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Related Experiment Videos

Muscular forces exerted on the normal deciduous dentition.

Wen-hua Ruan1, Min-dong Chen, Zhi-yuan Gu

  • 1Department of Stomatology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang province, China. ruanwh@hzcnc.com

The Angle Orthodontist
|November 11, 2005
PubMed
Summary

Forces on children's teeth are unbalanced during rest and swallowing, varying by sex and oral function. These findings may explain malocclusion in deciduous dentition.

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Area of Science:

  • Dental Science
  • Biomechanics
  • Pediatric Dentistry

Background:

  • Understanding forces on deciduous dentition is crucial for normal dental development.
  • Previous research has not fully elucidated the dynamic interplay of muscular forces, oral function, and sex in children.

Purpose of the Study:

  • To evaluate force distribution on normal deciduous teeth.
  • To investigate the relationship between muscular forces, sex, and oral function (rest vs. swallowing).

Main Methods:

  • Utilized a computer-aided perioral force-measuring system.
  • Measured forces in natural head position during rest and swallowing.
  • Analyzed pressure differences between lips, cheeks, and tongue.

Main Results:

Related Experiment Videos

  • Forces at rest ranged from 37-208 N/m2; during swallowing, 1009-1679 N/m2.
  • At rest, lip/cheek pressure exceeded tongue pressure (P < .05); during swallowing, tongue pressure was significantly higher (P < .001).
  • Boys exhibited higher cheek pressure at rest (P < .05) and higher labial pressure during swallowing (P < .01) compared to girls.

Conclusions:

  • Deciduous teeth experience unbalanced forces.
  • Force distribution and imbalance differ with oral function.
  • Significant lingual forces on mandibular anterior teeth may contribute to malocclusion.
  • Muscular forces show statistically significant differences between sexes.