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Related Experiment Videos

Normal masticatory performance in young adults and children

K C Julien1, P H Buschang, G S Throckmorton

  • 1Baylor College of Dentistry, Dallas, TX 75246, USA.

Archives of Oral Biology
|January 1, 1996
PubMed
Summary

Masticatory performance, or chewing ability, differs significantly between sexes and age groups, with body size being a key factor. Adjusting for body size largely explains these differences.

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Area of Science:

  • Human biology
  • Physiology
  • Biomechanics

Background:

  • Masticatory performance development and sexual dimorphism are understudied.
  • Understanding these factors is crucial for assessing oral function across different demographics.

Purpose of the Study:

  • To measure and compare masticatory performance in adults and children.
  • To investigate the influence of covariates like body size, bite force, and dentition on chewing efficiency.

Main Methods:

  • Evaluated masticatory performance by analyzing the breakdown of a standardized bolus (Cuttersil) using sieve analysis.
  • Calculated particle size distribution with the Rosin-Rammler equation.
  • Measured covariates including dentitional surface area, bite force, and mandibular morphology.

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Main Results:

  • Significant differences in masticatory performance were observed: men > women > girls.
  • Body size was the most significant predictor of masticatory performance.
  • Accounting for body weight eliminated group differences.
  • Body size, occlusal contact area, and bite force explained 60-72% of performance variation.

Conclusions:

  • Masticatory performance exhibits sexual dimorphism and developmental changes, strongly influenced by body size.
  • While some sex-based differences are explained by occlusal and biomechanical factors, adult-child differences persist even after covariate adjustment.