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Robotic Hair Transplants & Hair Restoration
Flagship: 110 East 55th Street, New York, NY
212-826-2400 - [email protected]
Bernstein Medical - Center for Hair Restoration
Hair Restoration Answers

What Causes ‘Graft Popping’ During Surgical Hair Restoration?

Q: What causes graft popping during a hair transplant? G.K. – Carle Place, N.Y.

A: Popping, or the tendency for grafts to elevate after they have been placed into the recipient area, is caused by a number of factors including:

  • Packing the grafts too closely, particularly when they are placed on a very acute (sharp) angle with the skin
  • Rough placing techniques
  • Bleeding
  • Poor fit between the graft and recipient site
  • Natural characteristics of the patient’s skin, including the elasticity and stickiness of wound edges

The problem with popping is that it exposes grafts to drying (while they are elevated on the skin surface) and trauma (when they have to be re-inserted).

The judgment and experience of the surgeon performing hair transplants is extremely important in minimizing popping. It is important that the surgeon customize the site size to the different size follicular unit grafts and to test the recipient sites as they are made, to make sure that the “fit” is perfect.

Although it is important to place grafts close together to get the best cosmetic result possible, over-packing of the grafts risks popping and other factors (such as overwhelming the blood supply) that may lead to poor growth.

In the end, maximum growth of the transplanted hair should be the primary goal.

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Hair Restoration Answers

In an FUT Hair Transplant, What Percentage of Telogen Phase Follicles in Donor Strip are Wasted?

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.

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Hair Restoration Answers

In Hair Transplant, What is Effect of Dense Packing on Grafts?

Q: Does dense packing hurt grafts? — P.L., Rye, NY

A: There is no absolute answer to this question. In a hair transplant, dense packing has a risk of decreasing yield if there is a significant amount of photo damage to the scalp (which alters the blood supply) and if there is a tendency for the grafts to pop (this is difficult to predict pre-operatively). Very closely spaced grafts exacerbates the popping and exposes the grafts to desiccation (drying), hypoxia (lack of oxygen) and mechanical trauma from the necessary re-insertion.

That said, the skill of the hair transplant surgeon and placing team, the size of the recipient sites, and the way the grafts are dissected and trimmed all play important roles in determining graft survival in dense packing.

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