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Evaluation of proximal contact strength by postural changes.

Hee-Sun Kim1, Hyun-Joon Na, Hee-Jung Kim

  • 1Graduate Student, Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju, Korea.

The Journal of Advanced Prosthodontics
|December 18, 2010
PubMed
Summary

Changes in body posture significantly affect posterior proximal contact strength (PCS) in the dental arch. This finding challenges the traditional view of PCS as a static dental feature, highlighting its dynamic nature.

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Area of Science:

  • Dental Science
  • Biomechanics
  • Occlusion Research

Background:

  • Proper proximal contact is crucial for dental arch stability.
  • Proximal contact strength (PCS) is variable and influenced by multiple factors.

Purpose of the Study:

  • To investigate the impact of postural variations on posterior proximal contact strength.
  • To determine if changes in body position affect the stability of teeth contacts.

Main Methods:

  • Twelve adults with normal occlusion were assessed.
  • Proximal contact strength was measured between canine and second molar in both arches.
  • Measurements were taken in upright, supine, and upright positions, with repetitions after 2 hours.

Main Results:

Keywords:
Proximal contact strengthSupine positionUpright position

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  • A general decrease in PCS was observed when moving from upright to supine posture.
  • PCS increased when returning to the upright position from supine.
  • Significant changes were noted in most areas, with exceptions in specific maxillary and mandibular contacts.

Conclusions:

  • Posterior proximal contact strength is significantly influenced by body posture.
  • This challenges the long-held belief that PCS is a static element of occlusion.
  • Posture should be considered a dynamic factor affecting dental arch integrity.