Hair Diameter Measurement Methods: Micrometer Caliper Versus Phototrichogram

April 2023 in “ Archives of Aesthetic Plastic Surgery ”

Jae Hyun Park, Yeh Hong Ho, Kotchamol Manonukul

hair diameter measurement micrometer caliper phototrichogram Folliscope hair thickness scalp hair loss hair transplantation hair measurement hair thickness measurement hair loss assessment hair transplant evaluation

Studysummary This study found that measuring hair thickness with a phototrichogram provided significantly thicker readings than using a micrometer caliper, suggesting that the phototrichogram may be more clinically useful for evaluating hair in patients undergoing hair transplantation. Our plain-language summary of this paper — not a Tressless recommendation.

This study compared hair diameter measurement methods using a micrometer caliper and a Folliscope phototrichogram in 10 female volunteers. Hair thickness was measured at three scalp sites and at three positions along the hair length. Results showed that the phototrichogram consistently measured thicker hair diameters (average 108.78±19.97 μm) compared to the caliper (average 76.90±12.29 μm), with significant differences across all sites (P<0.001). The study concludes that the phototrichogram is clinically useful for assessing hair thickness in patients with hair loss and those undergoing hair transplantation.

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research Hair Diameter Measurements for Planning Follicular Unit Extraction Surgery: Is There a Correlation Between the Micrometer Caliper and Scanning Electron Microscopy Findings?

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This study found that donor sites with higher hair density and thicker hair diameter had a better appearance after follicular unit excision in men with androgenic alopecia.

research KEBOT: An Artificial Intelligence Based Comprehensive Analysis System for FUE Based Hair Transplantation

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research Hair Diameter Variation in Different Vertical Regions of the Occipital Safe Donor Area

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This study found significant differences in hair diameter between males and females across different zones of the safe donor area, which may aid in selecting optimal donor regions for hair transplantation surgeries.

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research Use of Nape and Peri-Auricular Hair by Follicular Unit Extraction to Create Soft Hairlines and Temples: My Experience With 128 Patients

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This article discusses the potential use of nape and peri-auricular hair for creating softer hairlines in transplants and reports no clinical results; the authors highlight concerns about their permanency.

research Contribution of Hair Density and Hair Diameter to the Appearance and Progression of Androgenetic Alopecia in Japanese Men

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In this study, hair loss in Japanese men with androgenetic alopecia was found to be primarily due to hair follicle miniaturization rather than hair shedding, particularly in those aged 25 and older.

research Phototrichogram Analysis of Normal Scalp Hair Characteristics with Aging

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In this study, researchers characterized the normal scalp hair properties in South Koreans, observing that hair density declined with age and varied across scalp sites, while hair thickness patterns remained relatively stable until later in life.