Document Detail


Biomechanical properties of human hair with different parameters.
MedLine Citation:
PMID:  18412556     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND/PURPOSE: Investigations on the mechanical properties of human hair are inadequate. This research explores the break force of anagen hair by forming criteria according to the diameter of hair, gender, age, strain, use of drugs and hair dyes and how these criteria affect the mechanical resistance of hair. METHODS: The resistances of anagen hair of 120 volunteers were investigated in our biomechanics laboratory. The relationship between the value of break force of hair and hair diameter, gender, age, strain, use of drugs and hair dyes was examined. Tensile tests were applied to each hair with a 50 N load cell device. RESULTS: The statistical evaluation demonstrated a significant difference between the break forces of hairs with different hair diameters. The hairs with a diameter of 51 mum and above had a significantly higher break force than those of 50 mum and below (P=0.000). An insignificant correlation was observed between break force and strain (P=0.554, r=-0.055) whereas the correlation between diameter and strain was statistically significant (P=0.000, r=0.361). CONCLUSION: The break force of hairs did not show any significant dependency on age, presence of hair dyes, gender and usage of drugs. Yet, a statistically significant difference was observed between the break forces of hairs when compared according to their diameters and strain. More research on the mechanical properties of human hair consistent with biological properties like protein structure, alpha keratin fibers and microfibril-matrix composite behaviors would guide dermatologists for diagnostic symptoms.
Authors:
Berivan Erik; Hasan Havitcioglu; Sebnem Aktan; Nuriye Karakus
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI)     Volume:  14     ISSN:  1600-0846     ISO Abbreviation:  Skin Res Technol     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-16     Completed Date:  2008-05-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9504453     Medline TA:  Skin Res Technol     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  147-51     Citation Subset:  IM    
Affiliation:
Department of Biomechanics, Health Sciences Institute, Dokuz Eylul University, Izmir, Turkey. berivan.erik@deu.edu.tr
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aging / physiology*
Anisotropy
Biomechanics / methods*
Computer Simulation
Elasticity
Female
Hair / physiology*
Humans
Male
Middle Aged
Models, Biological*
Sex Factors
Stress, Mechanical
Tensile Strength
Weight-Bearing / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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