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GlossaryHair Diameter Measurement

process of determining width of individual hair strand

Hair Diameter Measurement, also known as Hair Thickness Measurement or Hair Width Measurement, refers to the process of determining the width of an individual hair strand. This measurement is typically done using tools like a micrometer or specialized imaging techniques. It is important for understanding hair health, diagnosing conditions like alopecia, and tailoring hair care treatments.

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

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

3 citations, April 2021 in “Journal of Cosmetic Dermatology”

The micrometer caliper is a reliable tool for measuring hair diameter for FUE surgery.

research Phototrichogram Analysis of Japanese Female Subjects with Chronic Diffuse Hair Loss

25 citations, June 2003 in “Journal of Investigative Dermatology Symposium Proceedings”

Phototrichogram and hair diameter measurements are effective, noninvasive ways to assess hair growth and detect early hair loss, with the most common pattern being reduced hair density.

research The Cross-Section Trichometer: A New Device for Measuring Hair Quantity, Hair Loss, and Hair Growth

29 citations, March 2008 in “Dermatologic Surgery”

The Cross-section Trichometer is a new tool that can measure hair quantity and detect hair loss and growth.

research Measurement of Hair Growth

26 citations, March 1986 in “Clinical and Experimental Dermatology”

Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.

research Cyproterone Acetate for Severe Hirsutism: Results of a Double-Blind Dose-Ranging Study

94 citations, July 1991 in “Clinical endocrinology”

Cyproterone acetate at 2mg daily is as effective as higher doses for treating excessive hair growth in women.

Donor Site of Follicular Unit Excision Hair Transplantation: The Relationship Between Appearance and Actual Hair Density, and Hair Diameter

research Donor Site of Follicular Unit Excision Hair Transplantation: The Relationship Between Appearance and Actual Hair Density, and Hair Diameter

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.

research Lack of Effect of Spironolactone on Hair Shaft Diameter in Hirsute Females

23 citations, July 1989 in “Postgraduate medical journal”

Spironolactone did not make hair thinner in women with excess hair growth.

research Hair Diameter in Systemic Lupus Erythematosus

6 citations, April 2006 in “Lupus”

People with lupus and rheumatoid arthritis have thinner hair than healthy people.

research Normal Head-Hair Length Is Correlated With Its Diameter

4 citations, November 2004 in “Clinical and Experimental Dermatology”

Hair length and thickness are related, with thickness peaking at about a quarter of the hair's maximum length.

research Scalp Hair Diameter Increases During Pregnancy

34 citations, August 2003 in “Clinical and Experimental Dermatology”

Pregnant women's hair gets thicker.

research The Effects of Lower vs Higher Cell Number of Platelet-Rich Plasma on Hair Density and Diameter in Androgenetic Alopecia: A Randomized, Double-Blinded, Placebo, Parallel-Group Half-Scalp IRB-Approved Study

6 citations, May 2021 in “Aesthetic Surgery Journal”

Higher cell number PRP improves hair density and diameter more than lower cell number PRP.

research Hair Follicle Transcriptome Analysis Reveals Genes Regulating Wool Fiber Diameter in Angora Rabbits

3 citations, March 2023 in “Biology”

Genes affecting wool fiber thickness in Angora rabbits were identified, which could help breed finer wool.

Reimagining Hair Science: A New Approach to Classify Curly Hair Phenotypes via New Quantitative Geometrical and Structural Mechanical Parameters

research Reimagining Hair Science: A New Approach to Classify Curly Hair Phenotypes via New Quantitative Geometrical and Structural Mechanical Parameters

April 2023

A new system for classifying curly hair types using precise measurements can improve hair care products and cultural inclusion.

research Assessment of Hair Density and Caliber in Caucasian and Asian Female Subjects with Female Pattern Hair Loss Using the Folliscope

24 citations, December 2011 in “Journal of The American Academy of Dermatology”

Caucasian hair is denser, but Asian hair is thicker in female pattern hair loss patients.

research Alternative Method for Creating Fine Hairs with Hair Removal Laser in Hair Transplantation for Hairline Correction

11 citations, January 2015 in “Annals of Dermatology”

Using a hair removal laser can make hairs finer for better hairline correction in hair transplants, with most patients happy and few side effects.

research The Action of a Cosmetic Hair Treatment on Follicle Function

1 citations, March 2018 in “bioRxiv (Cold Spring Harbor Laboratory)”

The hair treatment made hair grow faster and thicker and strengthened the hair roots.

research A Novel Cosmetic Approach to Treat Thinning Hair

29 citations, December 2011 in “British Journal of Dermatology”

A new hair treatment with caffeine and other ingredients makes hair thicker and less likely to break.

Microanatomical Observations of Hair Characteristics of Red Fox (Vulpes Vulpes), Golden Jackal (Canis Aureus), and Gray Wolf (Canis Lupus): A Comparative Study

research Microanatomical Observations of Hair Characteristics of Red Fox (Vulpes Vulpes), Golden Jackal (Canis Aureus), and Gray Wolf (Canis Lupus): A Comparative Study

1 citations, January 2021 in “Pakistan journal of zoology”

Red fox, golden jackal, and gray wolf hairs have similar features but differ in length, thickness, and inner structure.

research Transplants from Balding and Hairy Androgenetic Alopecia Scalp Regrow Hair Comparably Well on Immunodeficient Mice

17 citations, May 2003 in “Journal of The American Academy of Dermatology”

Hair from balding and non-balding areas regrows similarly on mice.

research Physical Properties of Human Hair: Evaluation of Bending Stress by Measuring the Major and Minor Axis of Human Hair

10 citations, January 2002 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi”

The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.

Platelet-Rich Plasma for Treatment of Non-Scarring Hair Loss: Systematic Review of Literature

research Visually Scoring Hirsutism

288 citations, June 2009 in “Human reproduction update”

The modified Ferriman-Gallwey method is a useful tool for diagnosing hirsutism.

research Examining Polyquaternium Polymers Deposition on Human Excised Hair Fibers

4 citations, November 2017 in “Journal of Cosmetic Dermatology”

Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.

research Morphological Approach to Hair Disorders

38 citations, June 2003 in “Journal of Investigative Dermatology Symposium Proceedings”

Accurate clinical, histological, and genetic methods are key for understanding and treating hair disorders.

How Different Is Human Hair? A Critical Appraisal of Global Hair Fibre Characteristics and Properties Towards Defining a More Relevant Framework for Hair Type Classification

research How Different Is Human Hair? A Critical Appraisal of Global Hair Fibre Characteristics and Properties Towards Defining a More Relevant Framework for Hair Type Classification

8 citations, November 2022 in “International Journal of Cosmetic Science”

Human hair varies widely and should be classified by curl type rather than race.