Bernstein Medical - Center for Hair Restoration

Tag Archive: Dermis

How Does the ARTAS Robot Work?

Q: How does the ARTAS^™ robotic hair transplant system actually work? — J.N., Fort Lee, NJ

A: The ARTAS System for Follicular Unit Extraction (FUE) combines several features including an interactive, image-guided robotic arm, special imaging technologies, small skin punches of two different sizes, and a computer monitor. After the system is positioned over the patient’s donor area of the scalp, ARTAS is capable of identifying and isolating follicular units from the surrounding scalp.

After the robotic arm is aligned with the follicular unit, a sharp 1-mm punch is used to cut through the upper part of the skin (the epidermis and upper dermis).

Immediately following this, a duller, 1.3mm punch is used to separate the deeper part of the follicular unit from the remainder of the dermis and subcutaneous fat. Once separated by the robot, the follicular units are manually removed from the scalp and stored until they are implanted into the patient’s recipient area.

Read about robotic FUE hair transplantation

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Posted by Robert M. Bernstein M.D. Updated 2015-12-04

Strategies for Follicular Cell Implantation

Follicular cell implantation (FCI) is based on the ability of the dermal papilla (DP) cells, found at the bottom of hair follicles, to stimulate new hairs to form. DP cells can be grown and multiplied in culture, so that a very small number of cells can produce enough follicles to cover an entire bald scalp.

In order to produce new follicles, two types of cells must be present. The first are Keratinocytes, the major cell type in the hair follicle, and the second are dermal papillae cells (DP) which lie in the upper part of the dermis, just below the hair follicle. It appears that the DP cells can induce the overlying keratinocytes to form hair follicles. There are a number of proposed techniques for hair regeneration that use combinations of cells that are implanted in the skin. The two major techniques involve either transplanting dermal papillae cells by themselves into the skin, or implanting them with keratinocytes.

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Posted by Robert M. Bernstein M.D. Updated 2017-11-15

Can Dermabrasion Repair "Pluggy" Hair Transplant Scars?

Q: Can dermabrasion help eliminate the circular edges of raised plug grafts caused by old hair transplants? Is this similar to the suturing and excision look?

A: Although dermabrasion can flatten elevated edges, it will not eliminate the round, white, circular scars that result from old punch graft hair transplants. The scarring in these procedures goes all the way through the dermis to the fat. Dermabrasion can only go down to the upper part of the dermis without causing further scarring.

Graft excision with suturing removes the plug as well as the underlying scar and eliminates the tell-tale circular marks of the older hair restoration procedures.

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Posted by Robert M. Bernstein M.D. Updated 2015-07-27

What Are Consequences of Trichophytic Closure in FUT Hair Transplant and Infection of Donor Area?

Q: Could you tell me in case there is an infection at the donor area following a hair transplant, will it prevent the hair to grow after healing if the donor area closed by Trichophytic Closure? What are the problems which may the infection cause? — S.S., Park Slope, NY

A: Infection may cause the donor incision to heal more slowly or with a widened scar after a hair transplant. It may affect any closure, Trichophytic or not.

The risk of infection after a hair restoration procedure is made worse by a tight closure, but not necessarily a Trichophytic closure, unless too much skin was removed at the edges leaving the dermis (deeper part of the skin) exposed.

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Posted by Robert M. Bernstein M.D. Updated 2017-12-01

Can I Have a Hair Transplant if My Scalp is Tight from Prior Surgery?

Q: What can be done if I want to have a hair transplant and my scalp is very tight from prior surgeries? — R.R., Long Island, N.Y.

A: Follicular Unit Extraction is ideal in very tight scalps, provided that there is enough hair to extract without leaving the donor area too thin and provided that the follicles are not too distorted from the scarring.

With strip harvesting, undermining techniques may be helpful to close the wound edges once the strip is removed.

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