The Density Issue in Hair Transplantation

    September 1997 in “ Dermatologic Surgery ”
    Bobby L. Limmer
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    TLDR Mini-micrografting in hair transplants can give similar density to older methods with fewer sessions.
    In the 1997 study by Bobby L. Limmer, MD, it was found that mini-micrografting could achieve comparable hair density to the older plug method in hair transplantation, with the added benefit of requiring fewer sessions. Hair counts per square centimeter from the author's practice indicated that the average density for plug graft cases was 59 terminal hairs per square centimeter. In contrast, mini-micrografted cases showed an increase in density with the number of sessions: one session averaged 41 hairs, two sessions averaged 50 hairs, three sessions averaged 63 hairs, and four sessions averaged 81 hairs per square centimeter. The study concluded that the density issue is not significant as long as a comparable number of hairs are transplanted per square centimeter, and that mini-micrografting is a more efficient technique in terms of sessions needed.
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