TLDR Researchers concluded that safe hair follicle extraction limits in FUE vary by individual characteristics and proposed a method to calculate these limits to maintain appearance.
In 2018, researchers investigated the factors that influence the aesthetic donor density in Follicular Unit Excision (FUE) hair transplant procedures. They found that the safe limit for hair follicle extraction was influenced by factors such as the patient's hair density, hair characteristics, and the size of the extraction tool. They proposed a method to maintain aesthetic donor density, which involved calculating the safe extraction limit based on the patient's specific characteristics. The researchers suggested that a safe single pass excision density could range from 10-25 FU/cm2, while the minimum residual donor FU density necessary for satisfactory donor area coverage after one or more surgeries could range from 40-50 FU/cm2. They concluded that while there is no single mathematical algorithm to incorporate all of the factors that contribute to donor area density, a weighted system may be possible to further enhance our ability to predict safe excision and residual donor densities.
7 citations,
November 2017 in “Plastic and reconstructive surgery. Global open” FUE and SMP together can effectively treat hair loss, needing fewer procedures.
9 citations,
March 2017 in “Dermatologic Surgery” Asian men with hair loss have different follicular densities: East/Southeast 61.1, South 63.5, West 63.6 FU/cm².
5 citations,
June 2016 in “Twin research and human genetics” Hair diameter and curvature are mostly determined by genetics.
83 citations,
April 1999 in “Dermatologic Surgery” The research found that for a typical hair density, about 11 square centimeters of donor scalp is needed to get 800 hair grafts for transplantation.
77 citations,
April 1999 in “Dermatologic Clinics” The document concludes that follicular unit transplantation offers more natural results and better graft survival than older hair transplant methods.
2 citations,
February 2020 in “Journal of Plastic Surgery and Hand Surgery” Good-looking donor sites for hair transplants usually have higher hair density and thicker hair.
July 2018 in “Hair transplant forum international” To prevent thinning in the donor area, harvest less than 50% of the original hair density in repeat hair transplants.
9 citations,
March 2020 in “Dermatologic Surgery” Both Follicular Unit Transplantation (FUT) and Follicular Unit Excision (FUE) are effective hair transplant methods; the best choice depends on the patient's needs and the surgeon's preference.
April 2019 in “Advances in Cosmetic Surgery” The document concludes that ongoing medical therapy is crucial for preventing hair loss, and surgical options can restore hair, with future treatments for hair loss being promising.
July 2021 in “Medical journal, Armed Forces India” Using platelet-rich plasma in hair restoration surgery significantly improves hair density after 6 months and is safe to use.
