Bernstein Medical Center for Hair Restoration - Donor Hair

Donor Hair

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Q: What is the problem with transplanting the crown too early? — P.L., Newark, NJ

A: If a person’s hair loss continues – which is almost always the case – the crown will expand and leave the transplanted area isolated, i.e. looking like a pony-tail. The surgeon can perform additional hair transplant procedures to re-connect the transplanted area to the fringe, but, as one can see from the photo below, this is a large area that can require a lot of hair. It is often impossible to determine when a person is young if the donor supply will be adequate. If there is not enough donor hair, then the island of hair may remain isolated. Most importantly, it uses up a lot of hair that might be better transplanted to the front and top of the scalp – areas that are far more important cosmetically.

Patient who visited us who had an early crown transplant

The front and top of the scalp are more important to one’s appearance than the crown, and these areas should be the first priority when planning hair restoration surgery.

As an exception, if a person has a family history of baldness limited to the crown, even at an advanced age, and the person in question is following this pattern, then earlier treatment of the crown may be considered.

Lastly, if you do treat the crown in a younger person, or one with whom the extent of hair loss is uncertain, the crown should be transplanted with light coverage only. That way a limited amount of hair will be used up in this area and there will be enough left over for the more cosmetically significant top and front of the scalp.

For a complete review of this topic please read: Follicular Transplantation: Patient Evaluation and Surgical Planning. Dermatol Surg 1997; 23: 771-84. A copy in PDF format, and other hair transplant publications, can be downloaded at the Bernstein Medical – Center for Hair Restoration Medical Publications page.

View the Crown (Vertex) topic, the Age topic or see posts tagged with Early Hair Loss for further reading.

View Before and After Photos of some of our crown hair transplant patients

Read about candidacy for a hair transplant in young patients

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Q: There is a famous hair transplant out there, Vice President, Joe Biden. How come it looks so unnatural? — W.S., Los Angeles, CA

A: With Joe Biden’s hair transplant a number of errors were made. Some were unavoidable due to the older technology and some were just poor planning. He had a hair transplant consisting mainly of large plugs because that was the way hair transplants were performed many years ago. But many of those plugs have now been fixed.

The persistent (but avoidable) problem is that Vice President Biden has a low, broad hairline. But when you see a low broad hairline one expects to see the rest of head to be covered with hair. But he didn’t have enough donor hair to accomplish this. With better planning, the hairline would have been more receded at the temples, producing a more natural, balanced look.

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Q: If a person is graying on the top and sides and you do a hair transplant from the back, will the top look darker after the hair restoration? — W.C., Houston, TX

A: The hair is taken from the back and sides of the scalp and the follicular units, once dissected from the donor strip, are randomly inserted into the recipient area. That way, the color of the harvested hair will be mixed and will match perfectly.

Usually, people’s hair is lighter on the top because of the sun, so when you move the hair from the back and sides to the top, it will actually lighten to match the surrounding hair, if it didn’t match already.

For further reading on how your hair performs after a transplant, visit the Growth After Hair Transplant topic.

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Q: I am considering having a hair transplant. Does my hair need to be cut? — I.S., New York, NY

A: In all hair transplant procedures, we are able to transplant into areas of existing hair without it having to be cut. The question of whether hair needs to be cut in the donor area depends upon the way the donor hair is obtained (harvested).

With a Follicular Unit Hair Transplant procedure using single strip harvesting method (FUT), only the strip of hair that is removed needs to be cut. When the procedure is finished, the hair above the incision lays down over the sutured area and it becomes undetectable.

In Follicular Unit Extraction (FUE), particularly in sessions over 600 grafts, large areas of the donor area must be clipped short (to about 1-2mm in length) in order to obtain enough donor hair.

View our page on the Pros & Cons of FUE hair transplantation

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Q: I have been reading about hair transplantation and I have a question concerning FUT (strip-harvesting). I understand, in this method, a strip is excised from the back of the scalp, the wound then closed. I wonder, then, is not the overall surface of the scalp reduced in this procedure? After two or three procedures, especially, (or even after one large session) will not a patient’s hairline also be shifted? That is, the front hairline would move back by the amount of scalp excised, or, more likely, the “rear hairline” (which ends at the back of the neck) must certainly be “moved upward.” At least, this is how I imagine it would be. Is my logic flawed? I’ve been trying to understand this in researching the procedure, but the point still evades me. — M.M., Great Falls, V.A.

A: The hair bearing area is much more distensible (stretchable) than the bald area and just stretches out after the procedure. As a result, the density of the hair in the donor area will decrease with each hair transplant session, but the position of the upper and lower margins of the donor area don’t move much – if at all. As a result, the major limitation of how much donor hair can be removed is the decreasing hair density, rather than a decrease in the size of the donor area.

With very low donor hair density the strip will yield so little hair that further sessions eventually become impractical. To say it another way, since a hair transplant decreases the donor density, in each succeeding hair transplant session, you need an increasingly larger donor strip to remove the same number of grafts.

This effect also explains why, in most instances, FUE will not allow the doctor to obtain any significant amount of additional hair, since the donor area is already too thin, and FUE would thin it further.

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Q: At what level of thinning should the hair transplant be done? — V.K., London, UK

A: A hair transplant should be considered in an area of thinning when:

  • The area has not responded to medical therapy (finasteride 1mg a day orally and minoxidil 5% topically for one year).
  • The thinning is significant enough that it can’t be disguised with simple grooming (i.e. is a cosmetic problem even when the hair is combed well).

Other factors that are important include:

  • the age of the patient
  • the donor supply
  • whether the thinning is in the front of the scalp or in the crown
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Bizymoms.com, the premier work-at-home community on the Internet with more than 5 million visitors per year, has interviewed Dr. Robert M. Bernstein in order to answer readers’ common questions about hair restoration and hair loss.

Below is a sample of the interview:

Q: Who would be a good candidate for hair transplant surgery?

In general, men and women age 30 and older can be candidates, but there are a host of factors that determine if a person is a good candidate…

Q: How does hair transplantation work?

Hair removed from the permanent zone in the back and sides of the scalp continues to grow when transplanted to the balding area in the front or top of one’s head…

Q: What can be done for people dissatisfied with previous mini/micrograft procedures?

If the grafts are too large they can be removed, divided into smaller units under a microscope, and re-implanted back into the scalp (the same day)…

Q: What are the possible harmful effects of Propecia and Rogaine?

The main side effect of Propecia (finasteride 1%) is sexual dysfunction, which occurs in about 2-4% of men taking the drug. Fortunately, these side effects are completely reversible when the medication is stopped. […] The main side effect of Rogaine (minoxidil) is scalp irritation. […] Both Propecia and Minoxidil can produce some hair shedding at the beginning of treatment, but this means that the medications are working…

Q: How many grafts/hairs are needed for hair transplant surgery?

An eyebrow restoration can require as few as 200 grafts, a hairline 800 and a scalp, with significant hair loss, 2,500 or more grafts. An equally important consideration is the donor supply…

Q: What are the advanced hair transplant techniques?

Follicular Unit Transplantation (FUT), where hair is transplanted exclusively in naturally occurring follicular units, is the state-of-the art. […] A more recent means of obtaining the donor hair, the follicular units are extracted individually from the back of the scalp. This procedure, called Follicular Unit Extraction (FUE) eliminates the need for a line-scar, but is a less efficient procedure for obtaining grafts…

Q: What are the new hair restoration treatments available for men and women?

Low-Level Laser Therapy (LLLT) utilizes cool lasers to stimulate hair growth and reduce shedding of hair. […] Latisse (Bimatoprost) is an FDA approved topical medication for eyelash growth.

Go to Bizymoms.com to read the full interview.

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Q: I never kept my hair really long, what length can I wear my hair after a hair transplant to hide that I had a procedure? — D.F., Chappaqua, N.Y.

A: Hair transplants, whether using the strip method to harvest the donor hair or by extracting individual follicular units one-by-one directly from the scalp, will leave some scarring. If the hair is long enough so that the underlying scalp is not visible, these scars will not be seen.

The quality and density of a person’s donor hair will affect this coverage and determine how short a person may keep his hair. In some cases the back and sides can be cut to a few millimeters, in others it would need to be kept longer. Since there is no scarring in the recipient area (the front and top of the scalp where the grafts are placed) the hair in these areas may be kept at any length.

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Q: Can the crown be transplanted first instead of frontal area? Why is the crown the last choice? Any reasons behind it? — H.H., Ladue, M.I.

A: The crown can be transplanted first in patients who have very good donor reserves (i.e., high density and good scalp laxity). Otherwise, after a hair restoration procedure to the crown you may not be left with enough hair to complete the front and top if those areas were to bald.

Cosmetically, the front and top are much more important to restore than the back. A careful examination by a trained hair restoration surgeon can tell how much donor hair there is available for a hair transplant.

For more information on this topic, see my publication on surgical planning of hair transplants, “Follicular Transplantation: Patient Evaluation and Surgical Planning.”

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Note from Dr. Bernstein: This article, by my colleague Dr. Rassman, is such important reading for anyone considering a hair transplant, that I felt it should be posted here in its entirety.

Areas of Unethical Behavior Practiced Today
William Rassman, MD, Los Angeles, California

I am disturbed that there is a rise in unethical practices in the hair transplant community. Although many of these practices have been around amongst a small handful of physicians, the recent recession has clearly increased their numbers. Each of us can see evidence of these practices as patients come into our offices and tell us about their experiences. When a patient comes to me and is clearly the victim of unethical behavior I can only react by telling the patient the truth about what my fellow physician has done to them. We have no obligation to protect those doctors in our ranks who practice unethically, so maybe the way we respond is to become a patient advocate, one on one, for each patient so victimized. The following reflects a list of the practices I find so abhorrent:

1. Selling hair transplants to patients who do not need it, just to make money. I have met with an increasing number of very young patients getting hair transplants for changes in the frontal hairline that reflect a maturing hairline, not balding. Also, performing surgery on very young men (18-22) with early miniaturization is in my opinion outside the “Standard of Care”. Treating these young men with a course of approved medications for a full year should be the Standard of Care for all of us.

2. Selling and delivering more grafts than the patient needs. Doctors are tapping the well of the patient’s graft account by adding hundreds or thousands of grafts into areas of the scalp where the miniaturization is minimal and balding is not grossly evident. I have even seen patients that had grafts placed into areas of the scalp where there was no clinically significant miniaturization present. Can you imagine 3,000-4,000 grafts in an early Class 3 balding pattern? Unwise depletion of a patient’s finite donor hair goes on far more frequently than I can say.

3. Putting grafts into areas of normal hair under the guise of preventing hair loss. There are many patients who have balding in the family and watch their own “hair fall” thinking that most of their hair will eventually fall out. A few doctors prey on these patients and actually offer hair transplantation on a preventive basis. This is far more common in women who may not be as familiar with what causes baldness and do not have targeted support systems like this forum. They become more and more desperate over time and are willing to do “anything” to get hair. They are a set-up for physicians with predatory practice styles.

4. Pushing the number of grafts that are not within the skill set of surgeon and/or staff. The push to large megasessions and gigasessions are driven by a limited number of doctors who can safely perform these large sessions. Competitive forces in the marketplace make doctors feel that they must offer the large sessions, even if they can not do them effectively. A small set of doctors promote large sessions of hair transplants, but really do not deliver them, fraudulently collecting fees for services not received by the patient. Fraud is a criminal offense and when we see these patients in consultation, I ask you to consider your obligation under our oaths and our respective state medical board license agencies to report these doctors.

5. Some doctors are coloring the truth with regard to their results, using inflated graft counts, misleading photos, or inaccurate balding classifications. False representation occurs not only to patients while the doctor is selling his skills, but also to professionals in the field when the doctor presents his results. Rigging patient results and testimonials are not uncommon. Lifestyle Lift, a cosmetic surgery company settled a claim by the State of New York over its attempts to produce positive consumer reviews publishing statements on Web sites faking the voices of satisfied customers. Employee of this company reportedly produced substantial content for the web.

The hair transplant physician community has developed wonderful technology that could never have been imagined 20 years ago. The results of modern hair transplantation have produced many satisfied patients and the connection between what we represent to our patient and what we can realistically do is impressive today. Unfortunately, a small handful of physicians have developed predatory behavior that is negatively impacting all of us and each of us sees this almost daily in our practices. Writing an opinion piece like this is not a pleasant process, but what I have said here needs to be said. According to the American Medical Association Opinion 9.031- “Physicians have an ethical obligation to report impaired, incompetent, and/or unethical colleagues in accordance with the legal requirements in each state……”

Rassman, WR: Areas of unethical behavior practiced today. Hair Transplant Forum Intl. Sep/Oct 2009; 19(5) 1,153.

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Q: Hi! I wanted to ask if after hair restoration surgery the transplanted hair will eventually fall out? Because the surgery is to restore hair mainly for people with genetic hair loss which results from DHT, won’t the DHT make the new follicles implanted fall out as well? — B.C., Stamford, C.T.

A: Hair loss is due to the action of DHT (a byproduct of testosterone) on hair follicles that cause them to shrink and eventually disappear (the process is called miniaturization). The follicles on the back and sides of the scalp are not sensitive to DHT and therefore don’t bald (miniaturize).

When you transplant hair from the back and sides to the bald area on the front or top of the scalp the hair follicles maintain their original characteristics (their resistance to DHT) and therefore they will continue to grow.

Read about Miniaturization

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Q: What’s the story with Joe Biden’s hair? — R.B., Inwood, N.Y.

A: Joe Biden — former Senator from Delaware and now the Vice President of the United States — apparently had a hair transplant many years ago using the older hair restoration techniques. This included not only transplanting hair in large plugs (corn rows), but using them to create a broad frontal hairline; a design that generally does not look natural as a person ages.

Also, the older grafts were transplanted in a vertical orientation giving a sprout-like, unnatural appearance.

The use of large plugs and the inefficiencies of the older procedures waste a considerable amount of donor hair, leaving Senator Biden with a dense rim of hair in the front part of his scalp and little coverage behind that.

The repair strategy would consist of removing the larger plugs, microscopically dividing them into smaller grafts (individual follicular units of 1 to 3 hairs each), and then placing the smaller grafts in a more forward direction and in a more natural distribution. This involves using the 1-hair units to soften the frontal hair line and the 2- and 3-hair units to extend the transplant further back on the scalp.

In addition to the hair transplant repair, Biden received significant cosmetic improvement from the natural graying of his hair over the years, as this tends to make the hair appear fuller and any irregularities less noticeable.

Read about Hair Transplant Repair techniques

View Before and After Hair Transplant Repair photos

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Q: I have had thinning eyebrows since my early twenties (I am now 32) and they have gotten to the point that I can’t make them look good with mascara anymore. I am considering an eyebrow hair transplant, how is it different from other hair transplants? — C.C., Williamsburg, N.Y.

A: Eyebrow hair restoration procedures are similar to hair transplants to the scalp in that the hair, once transplanted, is permanent. They differ both in the techniques used to perform them and in the results.

In eyebrow transplants, only individual hairs should be used, whereas follicular units containing from 1 to 4 hairs are used in a hair transplant to the scalp. In eyebrow transplants, the hairs must be positioned to lie as flat as possible to the surface of the skin. In hair transplantation to the scalp, the angle between the hair and the scalp surface can be as much as 45 degrees or more.

As with hair transplants to the scalp, the hair transplanted to eyebrows will continue to grow and must therefore be cut. However, in contrast to hair transplants where the donor hair is generally a perfect match for scalp hair, in eyebrow transplants the hair is taken from a different part of the body and will have slightly different characteristics both in growth rate and in appearance.

Visit our eyebrow transplant page for more information on eyebrow transplant and restoration procedures.

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Q: Some surgeons are doing hair transplants using 5,000 to 6,000 grafts in a single surgery. Looking at the cases in your photo gallery, it seems like your hair transplants involve many fewer grafts per surgery. Do you do such large graft numbers in a single hair restoration procedure? — H.P., Cranston, R.I.

A: The goal in surgical hair restoration should be to achieve the best results using the least amount of donor hair (the patient’s permanent reserves) and not simply to transplant the most grafts in one session. In my opinion, although large sessions are very desirable, the recent obsession with extremely large numbers of grafts in one session is misplaced. The focus should be on results.

For example, I would prefer to have full growth with a properly placed 2,500 – 3,000 graft hair transplant session than partial growth in a 5,000 graft session. Of course, the 5,000 graft session will look fuller than 2,500 grafts but, in my experience, never twice as full, and never as full as two 2,500 graft sessions.

The ability to perform large sessions is possible because of the very small recipient sites needed in Follicular Unit Transplantation (FUT). It is one of the main reasons that we developed this procedure in back in 1995. See the first paper on this subject: Follicular Transplantation.

However, like all good things, the technique loses some of its advantage when taken to extreme.

In “very” large sessions, the long duration of surgery, the increased time the grafts are outside the body, the increased amount of scalp wounding, risk of poor growth, wider donor scars, placing grafts where they are not needed, sub-dividing follicular units, and the decreased ability to plan for future hair loss, can all contribute to suboptimal results. These problems don’t always occur, but the larger the session, the greater the risk. Therefore, it is important to decide if one’s goal is simply to transplant the maximum amount of hair that is possible in one session, or to get the best long-term results from your hair restoration.

Follicular Unit Preservation

One of the most fundamental issues is that doctors using very large sessions are not always performing “Follicular Unit Transplantation” and, therefore, in these situations the patients will not achieve the full benefit of the FUT procedure. Although doctors who perform these very large sessions take the liberty of calling their surgery “Follicular Unit Transplantation,” in actuality it is not, since naturally occurring follicular units are not always kept whole. The procedure is defined as follows: “Follicular Unit Transplantation is a method of hair restoration surgery where hair is transplanted exclusively in its naturally occurring, individual follicular units.” (see Hair Transplant Classification)

By preserving follicular units, FUT maximizes the cosmetic impact of the surgery by using the full complement of 1 to 4-hairs contained in naturally occurring follicular units. A whole follicular unit will obviously contain more hair than a partial one and will give the most fullness. Keeping follicular units whole also insures maximal growth since a divided follicular unit loses its protective sheath and risks being damaged in the dissection.

It can sound impressive to claim that you performing very large hair transplants, but if the large numbers of grafts are a result dividing up follicular units, then the patient is being short-changed. The reason is that, although the number of grafts is increased, the total number of hairs transplanted is not. A 3-hair follicular unit that is split up into a 1-hair and 2-hair micro-graft will double the graft count, but not change the total number of hairs actually transplanted. In fact, due to the increased dissection, more fragile grafts, and all the other potential problems associated with very long hair transplant sessions, the total number of hairs that actually grow may be a lot less. Please look at the section “Limits to Large Hair Transplant Sessions” on the Graft Numbers page of the Bernstein Medical – Center for Hair Restoration website for a more detailed explanation of how breaking up follicular units can affect graft counts.

Donor Scarring

Since there are around 90 follicular units per cm2 in the donor scalp, one needs a 1cm wide by 28cm long (11inch) incision to harvest 2,500 follicular units. A 5,000 follicular unit procedure, using this width, would need to be 22 inches long, but the maximum length one can harvest a strip in the average individual is 13 inches (the distance around the entire scalp from one temple to the other).

In order to harvest 5,000 grafts, one would need 5,000 / 90 FU/cm2 = 55.6cm2 of donor tissue. If one takes the full 13 inch strip (33cm), then it would need to be 1.85 cm wide (55.6cm2 / (33cm long) = 1.85cm wide) or 1.85/2.54= ¾ of an inch wide along its entire length. However, one must taper the ends of a strip this wide (you can’t suture closed a rectangle) and, in addition, you can’t take such a wide strip over the ears. When you do the math again, it turns out that for most of the incision, the width must be almost an inch wide, an incredibly large amount of tissue to be removed in one procedure.

This large incision obviously increases the risk of having a wide donor scar – probably the most undesirable complication of a hair transplant. Needless to say, very large graft counts are achieved by sub-dividing follicular units rather than exposing the patient to the risk of an excessively large donor incision.

Popping

There are other issues as well. Large sessions go hand-in-hand with very high graft densities, since you often need these densities to fit the grafts in a finite area. The closer grafts are placed together, the greater the degree of popping. Popping occurs when a graft that is placed in the skin causes an adjacent one to lift-up. When a graft pops (elevates above the surface of the skin) it tends to dry out and die. Some degree of popping is a normal part of most hair transplant procedures and can be easily controlled by a skilled surgical team, but when it is excessive it can pose a significant risk to graft survival.

The best way to decrease the risk of popping being a significant problem is to not push large sessions (and the associated very dense packing) to the limit. In a patient’s first hair restoration procedure, it is literally impossible to predict the likelihood of excessive popping and once a very large strip is harvested, or the recipient sites are created in a very large session, it may be too late to correct for this. In addition, popping can vary at different times during the procedure and in different parts of the scalp adding to the problem of anticipating its occurrence.

Even if the distribution of grafts is well planned from the outset, a very large first session may force the surgeon to place hair in less-than-optimal regions of the scalp when popping occurs. This is because the surgeon must distribute the grafts further apart and thus over a larger area to prevent popping.

Blood Flow

Particularly where there is long-standing hair loss, the blood flow to the scalp has decreased making the scalp unable to support a very large number of grafts. This is not the cause of the hair loss, but the result of a decreased need for blood when the follicles have disappeared. In addition, persons that have been bald for a long time often have more sun damage on their scalp, a second factor that significantly compromises the scalp’s blood supply and may compromise the follicles survival when too many grafts are placed in one session. As with popping, the extent of photo-damage, as seen when the scalp gets a dusky-purple color during the creating of recipient sites, often only becomes evident once the procedure is well under way.

In the healing process following the first hair transplant, much of the original blood supply returns and this makes the scalp able to support additional grafts (this is particularly true if one waits a minimum of 8-10 months between procedures). This is another reason why it is better to not to be too aggressive in a first session when there is long-standing baldness or significant photo damage and where the blood supply may be compromised.

Limited Donor Supply

Another issue that is overlooked in performing a very large first session is that the average person only has about 6,000 movable follicular units in the donor area. When 5,000 grafts are used for the 1st procedure there will be little left for subsequent sessions and limit the ability of the surgeon to increase density in areas such as the frontal forelock or transplant into new areas when there is additional hair loss.

Conclusion

There are many advantages of performing large hair transplants, including having a natural look after one procedure, minimizing the number of times the donor area is accessed, and accomplishing the patient’s goals as quickly as possible. However, one should be cautious not to achieve this at the expense of a wider donor scar, poor graft growth, or a compromised ability to plan for future hair loss.

Achieving very high graft numbers should never be accomplished by dividing up the naturally occurring follicular units into smaller groups, as this increases the risk to the grafts, extends the duration of surgery, increases the cost of the procedure (when charging by the graft) and results in an overall thinner look.

For further discussion see:

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Q: In my first hair transplantation procedure, I wanted to be as conservative as possible and focus on thickening the thinning hair on top of my head and lowering the hairline minimally. Is it still possible to lower the hairline further in a second hair restoration procedure? Is there an “ideal” time period for a second hair transplant after the first? — B.B., Meatpacking, N.Y.

A: It is possible to lower the hairline with a second hair transplant, but the doctor must be certain that you have enough donor hair so that the transplanted pattern will look natural long-term.

Unless there is some pressing reason that you had to have a second session sooner, I would wait a minimum of 10-12 months between hair restoration procedures so that you can see the full cosmetic impact of the first session.

As a hair transplant matures and thickens, the hairline will look lower as the eye doesn’t see as far into the scalp.

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Q: I know that I can’t get all of my hair back, but what can I realistically expect from the best hair transplants? — S.A., Santa Monica, C.A.

A: You can expect the follicular unit hair transplant procedure to be perfectly natural, that the hair restoration will be completed in one or two sessions and you should anticipate a quick and easy post-op course.

The amount of coverage and density will depend upon your Norwood (balding) class, your donor reserves and your hair characteristics.

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Q: I am 22 and losing my hair all across the top of my head. How can I thicken my hair to its level a few years previously? — I.L., Kentfield, CA

A: If medication, such as finasteride, is successful it can thicken hair by increasing the diameter of the existing hair shafts. Although the cosmetic benefits can be dramatic in a person with significant hair loss, a hair transplant can not restore hair to its original density, since it only moves the existing hair around and does create new hair.

When hair cloning technology is available, this will change as a person’s donor supply will be increased.

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Q: There is such a big deal made on the chats about people getting Megasessions of over 4000 grafts per session. When I look at the pictures on your website, the results look great, but I am surprised that not many grafts were used compared to what is being talked about. — N.R., Poughkeepsie, N.Y.

A: My goal is not to transplant as many grafts as possible, but to get the best results possible without exhausting a person’s donor supply. It is important to keep reserves for future hair loss. Unnecessarily large sessions also risk poor growth and have a greater incidence of donor scarring.

View Before and After Hair Transplant Photos

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Q: When harvesting donor hair, how does the surgeon know when to stop? – D.D., Pleasantville, N.Y.

A: The patient must first decide the shortest length he/she is comfortable wearing his/her hair.

Donor hair can be removed — whether through Follicular Unit Transplantation (FUT) or Follicular Unit Extraction (FUE) — as long as, at this length, the back and sides do not look too thin (i.e. do not have a transparent look) and the donor scars are not visible. The surgeon needs to use his judgment when harvesting, so that this endpoint is not crossed.

Additionally, the surgeon must anticipate that the caliber of hair in the donor area will decrease slightly over time as a normal course of events. The actual number of grafts that can be harvested varies greatly from person to person. It depends on the patient’s donor density, scalp laxity, hair characteristics and size of the donor area.

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Q: Should you perform a hair transplant on a crown that is just starting to thin? — R.R. Philadelphia, Pennsylvania

A: A “thin” crown should first be treated with Propecia, as it may thicken the hair to a cosmetically acceptable degree without the need for surgery. If Propecia is ineffective in restoring enough hair, then surgical hair restoration can be considered.

The surgeon must also factor whether or not the patient has enough donor reserves to transplant the front and top part of the scalp if the patient becomes very bald. This is hard to predict in patients who are still in their twenties.

See the paper Follicular Transplantation: Patient Evaluation and Surgical Planning for a more complete discussion.

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Q: When a donor strip is taken out during a hair transplant and separated under the microscope, you can read on the internet that there is a wastage of grafts (about 15%), because of those unseen telogen hairs. What do you think about that and how does it affect the hair restoration? — T.B. Baldwin, New York

A: The Telogen phase of the hair cycle is about 3 months long and about 12% of follicles are in this phase at any one time. It is speculated that the follicles may be empty for perhaps 1/2 that time (this number may vary significantly between people). Therefore, approximately 6% of the hair follicles may be in telogen at any one time.

On average about 15% of the follicular units are 1-hair units (but this also may very greatly between patients). If 6% of all follicles are “empty” telogen follicles, then there should be .15 x .06 = .009 or about 1% of the patient’s 1-hair follicular units in the empty telogen phase that can’t be identified and will be missed on dissection.

The 1% isn’t very large. However, also consider that the remaining 5% of the empty follicles are associated with larger follicular units (i.e. those with 2-4 hairs). If these follicular unit grafts are closely trimmed, as is the practice with very dense packing, a much more significant number of follicles are at risk of being lost. With chubby follicular unit grafts (i.e., where the microscopic dissection leaves a protective sheath of tissue around the follicles) the risk should be closer to the 1%.

The lesson for hair transplantation is that over-trimming of grafts, for the sake of very dense packing, may waste telogen hairs as well as place the grafts at an unnecessary risk of mechanical trauma, drying and warming.

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Q: I’ll be traveling from New York to Cincinnati the week after my hair transplant. Will I be able to get through airport security if I have staples? — D.B. Fort Lauderdale, Florida

A: Yes. Although the staples that we use to close the donor area after hair transplant or restoration procedures are made of stainless steel, they are too small to be picked up by metal detectors.

I generally prefer staples, as they are superior to sutures in preserving donor hair.

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Q: I have fine hair. Is that a problem for a hair transplant? — N.R., Boston, MA

A: Fine hair will give a thinner look than thicker hair, but will look completely natural. Thin hair doesn’t prevent one from having surgical hair restoration, providing your donor density and scalp laxity are adequate. These would need to be measured.

Visit our Hair Transplant Photos section to see before and after photos of some of our patients who had hair transplants with fine hair.

Before after photos of patients with fine hair

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Q: Can you use beard hair for a hair transplant using Follicular Unit Extraction? — A.C., San Francisco, CA

A:It is possible to use beard hair for a hair transplant, but there are three main differences between harvesting from the donor area and harvesting from the beard that should be taken into account. These are: 1) scarring 2) ease of extraction and 3) hair quality. Let’s explore these differences in turn.

First, in FUE, although there is no linear scar, there are small white round scars from where the hair is harvested. Normally these marks are hidden in the donor area and are not visible, even if the hair is clipped very short. However, if the scalp is shaven, these marks will become visible. When the beard is used as the donor source for the hair transplant, the patient must continue to wear a beard after the restoration, even if it is tightly cropped, or the faint white marks will show. The tiny round scars from FUE will generally be visible on a clean shaven face. As each person heals differently, we would perform a test before doing the actual procedure to make sure the marks from the extraction are not noticeable at the length that the person wants to wear his beard.

Second, FUE performed on beard hair differs from extraction from the scalp because of the greater laxity — or looseness — of facial skin. This makes extraction with minimal transection more difficult in some cases. A test prior to the hair transplant is particularly important in beard FUE so that the ease of extraction may be determined in advance.

Third, beard hair is coarser than scalp hair. Although the hair seems to take on some of the characteristics of the original hair in the transplanted area, the transformation is not complete. This makes beard hair an imperfect substitute for scalp hair.

A solution to the problem is to transplant beard hair behind the hairline for volume and scalp donor hair at the hairline for naturalness.

Read about FUE Hair Transplants

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Q: If someone doesn’t have enough donor hair, do you ever perform an FUE hair transplant using donor hair from outside the permanent hair zone? — M.V., Nashville, TN

A: No. If hair was taken from outside the permanent zone as the surrounding hair continued to bald, the scars from FUE, although small, would become visible.

In addition, the transplanted hair would not be permanent, and over time would eventually fall out.

Read more about FUE hair transplant procedures

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Dr. Bernstein was interviewed by Skin & Allergy News in their article, “Microscopic Dissection Offers Superior Yield” The complete article is below:

Skin & Allergy News
February 1999

Skin & Allergy News - Microscopic Dissection Offers Superior Yield

Microscopic Dissection Offers Superior Yield
Articles by Anna Nidecker
Senior Writer

Washington — The dissecting microscope takes some getting used to, but using it makes more efficient use of donor hair during follicular unit transplantation than magnifying loupes with transillumination, reported Dr. Robert Bernstein of Columbia University Microscopic Dissection of follicular unitsCollege of Physicians and Surgeons, New York.

“A limiting factor in all hair restoration surgery is the patient’s finite donor supply. […] Meticulous stereomicroscopic dissection should help preserve the supply and ultimately provide the patient with the most transplantable hair,” he said at the annual meeting of the International Society of Hair Restoration Surgery.

Dr. Bernstein compared the follicular unit graft yields of dissections performed with stereoscopic microscopes and with loupes and backlighting. Initial sectioning of the intact strip was done with loupes, as the staff had not yet mastered the skill of slivering that is needed to section the intact strip under microscopic guidance.

“This method may be useful for a team in transition, a model for staffs in transition to using the microscope,” the hair transplant surgeon suggested.

Tips on Transition to Microscopes

The microscope offers a better yield with follicular transplantation, but some doctors feel that abruptly switching from loupe magnification may send an office into turmoil.

Microscopes will be well received by staff if they clearly understand the benefits and are eased into the transition, Dr. Bernstein said.

Dr. David Seager advised physicians planning the transition to the use of microscopes to let staff observe microscopic dissection at another clinic with an established program, and to send them somewhere to be trained before they start. The Toronto hair transplant surgeon also advised buying a couple of microscopes and letting the staff “play” with them for a while, cutting at their own leisurely rate before entering into a high-pressure transplant session.

Dr. Bernstein also recommended easing slowly into the transition by first training a small portion of staff, which will not affect the overall time of surgery.

Another option is to hire a couple of new technicians and train them from the beginning with microscopic dissection, Dr. Seager suggested.

“You’ll be amazed at the beautiful grafts they will be cutting in a couple of weeks. […] It may be only 40 grafts an hour, but these newcomers will be cut­ting better grafts than even your 8-year veterans,” he said. “Old staff will look at these new technicians and their grafts, and, if they take pride in their work, they will be quite jealous and will be re­ally eager to catch up.”

Dr. Bernstein agreed: “The value of the microscope may be more significant in the hands of less experienced dissectors. […] There’s some advantage even at the outset.”

Continued resistance from staff should be met with a deadline: ‘Anyone who can’t or won’t fit in, tell them they can do something else in the office, but they won’t be doing transplanting,” Dr. Seager said.

In 41 patients, the donor strip was harvested with a double-bladed knife from the midportion of the permanent zone in the back of the scalp.

The strip was divided into two equal parts along the midline; these were further divided into 2- to 3-mm wide vertical sections using loupes and a straight razor. Sections from one of these donor strip halves were further dissected into follicular units using a 10x power microscope; sections from the other donor strip half were dissected using magnifying loupes.

Follicular units cut using the microscope contained an average of 2.41 hairs; those cut using loupe magnification yielded 2.28 hairs. Use of the microscope also yielded 10% more follicular units and 17% more hair overall, compared with use of loupes.

The grafts were dissected and sorted into follicular units containing one to four hairs, and all hair and hair fragments judged to be potentially viable were counted towards the yield (Dermatol. Surg. 24[8]:875-80, 1998).

Microscopic dissection took from two to four times as long as loupe magnified dissection when technicians first began using the microscopes. After 3 months, the procedure still took twice as long with the microscopes. But by the end of the study 1 year later, it took only 10% longer, a rate they currently maintain, Dr. Bernstein said.

Hand-eye coordination was a factor which automatically improved, and the inefficient movement of grafts in and out of the microscopic field was solved with better organization, he said. Technicians with a tendency to obsessively sculpt grafts under the microscope can be educated to limit this sculpting, which does not affect the quality of the transplant.

Use of the microscope also led to fewer reports of back and neck strain by assistants. They also reported easier dissection when there was donor scarring, and with blond or light-colored hair.

Besides the benefit at the stage of dissecting the sections—as shown in this study—microscopes can improve yield by 5%-10% at the “slivering” stage. Yield can be improved an additional 15%-20% by avoiding use of the multibladed knife at the donor harvesting stage.

Loupe advocates argue that microscopes unduly slow down the procedure and that staff resistance to this new technology may be an insurmountable problem in some practices. They also lament the higher economic cost of purchasing the microscopes, training the staff, and slowing down dissection time with no clear benefits.

Dr. Bernstein said that the benefits of microscopic dissection far outweigh these minor inconveniences and should be incorporated into hair transplant procedures.

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Follicular Unit Transplantation (FUT) was first introduced to the medical community by Dr. Robert Bernstein in his 1995 publication “Follicular Transplantation.” Dr. Bernstein presented this paper at the Annual Meeting of the International Society of Hair Restoration Surgeons the following year. However, the procedure initially met with great resistance by hair transplant community and for the next three years, only a handful of physicians were actually using this new technique. That all changed in 1998.

At the 6th Annual 1998 Meeting of the International Society of Hair Restoration Surgeons held in Washington, D.C., Dr. Walter Unger (defending the “old guard”) debated Dr. Bernstein (representing this new technique) in front of an audience of over 450 hair restoration surgeons from around the world. Dr. Unger took the position that large grafts still had a place in surgical hair restoration, particularly for creating density. Dr. Bernstein took the position that the new procedure of Follicular Unit Transplantation could create that density while at the same time achieving a completely natural look – something large graft procedures were incapable of doing. He argued that the versatility and naturalness of Follicular Unit Transplantation rendered the older procedures obsolete.

Follicular Unit Hair Transplantation clearly won the day… and the rest is history. Within three years of this debate, there were hardly any doctors left in the United States still performing large-graft hair transplant techniques. A review of their discourse appeared in Dermatology Times.


Excerpts from the debate with Drs. Unger and Bernstein taken from presentations at the annual meeting of the International Society of Hair Restoration Surgery held in Washington, D.C., 1998.

Is There Still a Place for Standard Grafts in Hair Restoration Surgery?

Position: YES

Dr. Walter Unger

You have to use the hair transplant technique that will give you consistently good results. I can consistently produce very natural-looking results regardless of the type of grafts that I use. I have many patients come back who report that even their hairstylists can’t tell that they have had transplants.

It’s not that I don’t like follicular units or have a thing about big grafts; I know that all of these techniques can yield good results. I object to the “absolute” rules presented by speakers at hair restoration meetings, on the Internet, or in advertisements in order to promote one particular concept.

Of course, you can produce 80 hairs per square centimeter with Follicular Unit Transplantation, and you get good results. However, you shouldn’t remove any of the other graft options, including standard grafts, from your armamentarium.

This is what is wrong with our profession right now: there is too much “irrational exuberance.” If you can find something that works well in your hands, then use it, but do not tell other people that it is the only way they can do things.

There are costs to follicular unit-only hair transplantation that must be recognized. I get less density with follicular units than I can get with a session using several different graft sizes. Given, thin is often appropriate; you don’t want to use up all of your donor hair frontally if you have a limited or poor donor-recipient area ratio. You also don’t want to use it up in a young man.

However, there are some people who can well afford the donor hair and want great density. In these individuals, mixed grafts are the best option in my hands.

Furthermore, there is more tissue handling with follicular unit transplantation during both preparation and insertion of the grafts. A larger number of grafts have to be transplanted, and they have to be densely packed if you want a dense enough result per session, compared with standard grafting.

Follicular unit grafting also risks the loss of hairless follicles. You can lose up to 13% of follicles that are in the resting telogen phase. Even if you can see these hairless follicles, and I’m not sure that you can, technicians are not looking for them when they are slicing up donor tissue into follicular units.

Admittedly, you have to be an extraordinary surgeon to get good results with large grafts at the hairline. However, when I use larger grafts, I use them in a limited area posterior to the hairline zone, which is always created with micrografts and minigrafts anteriorly as well as posteriorly; on either side of the larger grafts; and in areas of existing hair that is likely to be lost with the progression of male pattern baldness.

Position: NO

Dr. Robert M. Bernstein

Finally, after 40 years, standard grafts are on the defensive.

Standard grafts exhibit a callous indifference to human tissue. Standard grafting causes significant damage to the donor area through the larger recipient wounds. They always require a “cover-up” using smaller, more appropriately sized grafts.

Proponents of standard grafting claim that large grafts are needed for density and that large grafts avoid the loss of telogen follicles.

They also lament the psychological toll of long hair transplant sessions using small grafts but ignore the effects of a protracted course of small multiple surgeries.

These hair restoration surgeons attempt to impress you with fancy terms like “maximum density” and dazzle you with hair counts approaching 200 hairs per square centimeter.

But traditional grafts often cause the scalp to feel unnatural and have an unnatural look when wet, when the hair is seen at different angles, or when the hair is not perfectly groomed. Other dangers include decreased perfusion after healing, an unnecessarily large number of procedures, and long-term problems with hair distribution.

All of us can achieve high density, but the final density is determined by the amount of hair moved, rather than the size of the grafts. Density is a somewhat misleading term since a transplanted density that approximates 50% of the original hair density is indistinguishable from one’s original hair.

Regardless, you can achieve as much density as you want with follicular transplantation while maintaining a totally natural look.

Moreover, telogen hairs are not necessarily lost when properly dissected during follicular unit harvesting because they often are part of a follicular unit that has visible hairs.

The risk therefore of any of them being lost is negligible, particularly if the dissection is performed with care.

The future of hair transplantation lies in the ability to preserve the blood supply and minimize scarring in the recipient area.

When standard large grafts are used centrally, multiple hair transplant sessions are required and there is a possibility that the blood supply can be compromised, resulting in poor growth and “doughnuting,” a condition where the hair in the center of large grafts does not survive.

Hair survival in larger grafts is highly exaggerated; doughnuting and other evidence of poor graft survival are evident regardless of technique.

Large grafts are very inefficient, seldom grow at 100%, and require a “screening” population of micrografts and minigrafts to look natural. As a result, they rapidly deplete donor supply.

Regardless, the primary reason for the decline of standard graft use is that even the best of 4-session standard graft cases appear pluggy upon close inspection. The rationale for using standard round grafts has been to achieve maximum density. However, appropriate density can now be achieved with a hair restoration procedure that looks totally natural and avoids the problem of these larger grafts. If doctors had the insight to use small grafts when hair transplantation first began in the 1950’s would we even be discussing the use of the larger standard graft procedures today?

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Cosmetic Surgery Times features Dr. Bernstein’s presentation to the 55th annual meeting of the American Academy of Dermatology in their April 1997 issue.

The article entitled, “Follicular Transplants Mimic Natural Hair Growth Patterns,” describes Dr. Bernstein’s introduction of his new procedure, Follicular Unit Transplantation, to the academy as well as the keys to making the technique successful. Find the complete article below:

Form Follows Function: Follicular Transplants Mimic Natural Hair Growth Patterns

By Neil Osterweil
Contributing Editor

SAN FRANCISCO – In recent years, many hair replacement surgeons have adopted the modem architecture philosophy that “less is more,” moving from the use of hair plugs, to split grafts, to minigrafts and, finally, micrografts. But at least one hair transplant specialist contends that a more appropriate architectural dictum is “form follows function.”

In other words, the surgeon should let the technique fit the head, and not the other way around, suggested Robert M. Bernstein, MD, at the 55th annual meeting of the American Academy of Dermatology.

Dr. Bernstein is an assistant clinical professor of dermatology at the College of Physicians and Surgeons, Columbia University in New York. He described his “follicular transplantation” technique in a meeting presentation and in an interview with COSMETIC SURGERY TIMES.

Natural Hair Groups Used

Dr. Robert M. Bernstein“Hair doesn’t grow singly it grows in naturally occurring groups of from one to four hairs. In follicular transplantation, we use these naturally occurring groups as the unit of the transplant,” he told CST.

The typical follicular unit consists of one to four terminal hairs, one or two vellus hairs, sebaceous glands, subcutaneous fat and a band of collagen which circumscribes and defines the unit. In the follicular transplant technique, the follicular unit is carefully dissected and removed, and then the intervening skin is discarded. This enables the donor site to be small, allowing implantation through a small needle poke. Because trauma to the recipient sites is minimal, the entire procedure can be performed at one time. Dr. Bernstein and colleagues have implanted as many as 3,900 follicular units in a single, 1 day session.

Keys to the follicular transplant technique are:

Identify the patient’s natural hair groupings and isolate the individual follicular units – Hair groupings are assessed with an instrument called a densitometer, and the average size of a person’s groups can be easily calculated. This information is critical in the planning of the transplant. The density of hairs in an individual measured as the number of hairs per square millimeter of skin is quite variable, but the density of follicular units is relatively constant within individual races.

Most people of Caucasian ancestry have a density of approximately one group per millimeter; people of Asian and African descent tend to have slightly less dense growth patterns, although the characteristics of the person’s hair (such as wavy or wiry hair), can give a full appearance even with low density.

If a patient has an average hair density of two, he will receive mostly two hair implants, with some one-hair and three hair implants mixed in. “If you try to make the groups larger than they occur naturally, they will look pluggy. If you try to make them smaller than they naturally occur, they’re not going to grow as well, because each group is actually a little biologic machine that makes the hair — it’s an anatomic unit. If you break it up it just doesn’t grow as well,” Dr. Bernstein observed.

Form Follows Function: Follicular Transplants Mimic Natural Hair Growth Patterns
A 38-year old man with a Norwood Class 5A/6 hair loss pattern undergoes a single procedure of 2,500 follicular implants. The result 11 months later. (Photos courtesy of Robert M. Bernstein, MD)

Harvest meticulously – The acquisition and preparation of grafts must be carefully performed to ensure success for this demanding technique. Highly trained, skilled assistants are essential to the success of the procedure. Dr. Bernstein noted that he uses a highly trained team of up to 10 assistants to produce the implants for a single case. “The assistants, who range from medical technicians to registered nurses, are such an integral part of the procedure that they must become expert in their specific tasks for the surgery to be successful.” The physician must be able to skillfully harvest the donor strip and must be able to make accurate judgments about the size of grafts intra-operatively and adjust the technique accordingly. Dissection and placing of the follicular units is the most labor intensive part of the procedure.

Design the recipient area well – The recipient sites are carefully distributed so that a natural looking pattern is maintained throughout the recipient area. An important consideration for this stage of the procedure is to “frame the face and spare the crown” so those facial features are kept in correct proportion. A common mistake in hair replacement, said Dr. Bernstein, is to create a hairline that is too high thereby elongating the forehead and accentuating, rather than minimizing, the patient’s baldness. It is also important to avoid or eliminate contrast between the implants and surrounding skin by creating a soft transition zone of single hairs and to have the hair emerge from the scalp at natural angles.

Procedure Lowers Cost

Although the procedure is highly labor intensive, it can actually be less expensive than conventional hair replacement surgery, because it can be performed in a single, but lengthy, session.

“It is also much more efficient and conserves donor hair much better than conventional hair transplants. Every time you make an incision in the person’s scalp you waste some hair and make the remaining hair more difficult to remove. Accessing the donor area just once or twice will increase the total amount of hair that is available for the transplant,” Dr. Bernstein told CST.

“In the very near future, the procedure will be improved and made more affordable with automated instruments that will enable the surgeon to make sites and implant the hair in a single motion. This will also decrease the possibility of injury to the implants by reducing handling and keeping the grafts uniformly cool and moist. It is possible that someday hair follicles may be cloned to provide a virtually unlimited supply of custom follicular units, but until then the finite nature of a person’s donor supply must be respected,” concluded the doctor.

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