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A histomorphometric analysis on bone dynamics in denture supporting tissue under continuous pressure.

Y Imai1, T Sato, S Mori

  • 1Department of Removable Prosthodontics, Okayama University Dental School, Okayama, Japan. yasumasa@md.okayama-u.ac.jp

Journal of Oral Rehabilitation
|February 15, 2002
PubMed
Summary

Continuous pressure from dentures affects bone dynamics. Higher pressures (10.0 and 20.0 kPa) caused significant bone resorption, while lower pressures (0.0 and 1.0 kPa) inhibited bone formation without resorption.

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Area of Science:

  • Oral biology
  • Biomaterials science
  • Bone physiology

Background:

  • Denture use can lead to changes in underlying bone.
  • Understanding bone response to pressure is crucial for denture design.

Purpose of the Study:

  • To investigate bone dynamics under denture bases.
  • To correlate continuous pressure intensity with bone tissue changes.

Main Methods:

  • Wistar rats were divided into five groups, with four wearing dentures exerting 0.0, 1.0, 10.0, or 20.0 kPa pressure.
  • Palatal bone tissue was analyzed using fluorescent labeling and undecalcified grinding sections.

Main Results:

  • Low pressure (0.0-1.0 kPa) inhibited bone formation but did not cause resorption.

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  • High pressure (10.0-20.0 kPa) induced bone resorption, with amounts correlating to pressure intensity.
  • Post-resorption bone formation showed delayed mineralization compared to baseline.

    • Conclusions:

    • Bone dynamics under dentures are pressure-dependent.
    • Higher continuous pressure leads to greater bone resorption.
    • Bone recovery after resorption does not fully restore original bone levels.