Investigation of Optimum Transplant and Extraction Density Based on Data from the Donor Area of Chinese Androgenetic Alopecia Patients: A Multicenter, Retrospective Study

    April 2020 in “ Journal of Cosmetic and Laser Therapy ”
    Bensen Sun, Shu Zhang, Sushmita Pradhan, Wen-Bin Zhao, Yuxian Xu, Xiwang Zhang, Yongfeng Diao, Xian Jiang
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    TLDR Optimal transplant density for Chinese male hair loss patients is 35-50 hair/cm², with minimum 106.88 hair/cm² left in donor area for esthetic satisfaction.
    This document is a summary of a study that investigated the optimum transplant and extraction density for Chinese male androgenetic alopecia (AGA) patients. The study found that a density of 35.00-50.00 hair/cm² (20.00-30.00 FU/cm²) is adequate for most Chinese male AGA patients, and a mean extraction density of 25.93 ± 2.75 hair/cm² and a density of 112.93 ± 11.88 hair/cm² remaining in the safe donor area (SDA) were obtained. The study also found that the minimum HFs retention in the SDA should not be less than 106.88 hair/cm² to maintain an esthetic satisfaction unless the patient prefers a long-hair style. The study concluded that the formula may act as a tool to assist the surgeon in communicating effectively and freely with patients about the effects and outcome of hair transplantation.
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