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

May 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

androgenetic alopecia hair transplant extraction density donor area hair follicles esthetic satisfaction AGA

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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