Sexual dimorphisms in three-dimensional masticatory muscle attachment morphometry regulates temporomandibular joint mechanics

Temporomandibular joint (TMJ) disorders disproportionally affect females, with female to male prevalence varying from 3:1 to 8:1. Sexual dimorphisms in masticatory muscle attachment morphometry and association with craniofacial size, critical for understanding sex-differences in TMJ function, have n...

Full description

Saved in:
Bibliographic Details
Published in:Journal of biomechanics 2021-09, Vol.126, p.110623-110623, Article 110623
Main Authors: She, Xin, Sun, Shuchun, Damon, Brooke J., Hill, Cherice N., Coombs, Matthew C., Wei, Feng, Lecholop, Michael K., Steed, Martin B., Bacro, Thierry H., Slate, Elizabeth H., Zheng, Naiquan, Lee, Janice S., Yao, Hai
Format: Article
Language:English
Subjects:
Anthropometry
Arm
Asymmetry
Attachment
Biomechanics
Biting
Cadavers
Contact force
Correlation
Craniofacial morphology
Digitization
Disorders
Electromyography
Females
Force
Joints (anatomy)
Mandible
Mastication
Mathematical models
Morphology
Morphometry
Muscle attachment
Muscles
Musculoskeletal modelling
Physiology
Regression analysis
Sex
Sexual dimorphism
Statistical analysis
Statistical models
Temporomandibular joint
Temporomandibular joint disorders
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Temporomandibular joint (TMJ) disorders disproportionally affect females, with female to male prevalence varying from 3:1 to 8:1. Sexual dimorphisms in masticatory muscle attachment morphometry and association with craniofacial size, critical for understanding sex-differences in TMJ function, have not been reported. The objective of this study was to determine sex-specific differences in three-dimensional (3D) TMJ muscle attachment morphometry and craniofacial sizes and their impact on TMJ mechanics. Human cadaveric TMJ muscle attachment morphometry and craniofacial anthropometry (10Males; 11Females) were determined by previously developed 3D digitization and imaging-based methods. Sex-differences in muscle attachment morphometry and craniofacial anthropometry, and their correlation were determined, respectively using multivariate general linear and linear regression statistical models. Subject-specific musculoskeletal models of the mandible were developed to determine effects of sexual dimorphisms in mandibular size and TMJ muscle attachment morphometry on joint loading during static biting. There were significant sex-differences in craniofacial size (p = 0.024) and TMJ muscle attachment morphometry (p 
ISSN:0021-9290
1873-2380
DOI:10.1016/j.jbiomech.2021.110623