Study on Hair Distribution in Healthy Males for Hair Restoration Design

October 2018 in “ Journal of Craniofacial Surgery ”

Yunqi Bao, Ke-Jia Wu, Jun Lin, Yuchong Chen, Wenyu Wu

hair loss hairline shapes linear hairline central protrusion round hairline vertex scalp occipital scalp anterior hairline hair density hair follicular units hair restoration hair transplant surgery

Studysummary In this study, researchers observed the patterns of hair distribution and scalp anatomy in Chinese young adult males, finding significant variations in hairline shape, hair density, and follicular unit structure.

Our plain-language summary. Not medical advice or a treatment recommendation. Consult a qualified healthcare professional before changing treatment. Full disclaimer

In 2018, a study was conducted on 1000 healthy Chinese males aged 18-25 to investigate hair distribution patterns. The study found a 21.3% incidence of hair loss and classified hairline shapes into four categories: linear (48.7%), linear with central protrusion (27.9%), round (9.8%), and round with central protrusion (13.7%). The average height of the median line was 6.78±0.75 cm, and the ratio of the median line and the forehead height was 0.333. Hair density was highest in the vertex scalp (171.12±18.32 hairs/cm²) and the occipital scalp (147.79±20.46 hairs/cm²), with the anterior hairline having a density of 124.76 ±19.98 hairs/cm². The structure of hair follicular units was mainly 1-hair in the anterior hairline area and 2-hair follicular units were dominant in the vertex and occipital scalp. These findings were suggested to assist in hair restoration design and provide a theoretical basis for hair transplant surgery.

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