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Tooth support in the human mandible.

W J Ralph1, C D Thomas

  • 1Department of Restorative Dentistry, Faculty of Dental Science, University of Melbourne, Australia.

Journal of Oral Rehabilitation
|September 1, 1988
PubMed
Summary
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Human mandible bone structure analysis reveals cortical plates offer primary anterior tooth support. Trabecular bone is minimal, and its arrangement challenges existing theories on functional load resistance.

Area of Science:

  • Oral biology
  • Dental anatomy
  • Biomechanics

Background:

  • Understanding the structural integrity of the human mandible is crucial for dental health.
  • Previous assumptions suggested trabecular bone alignment resists functional loads transmitted by the periodontal ligament.

Purpose of the Study:

  • To analyze the three-dimensional bone structure supporting anterior human teeth.
  • To investigate the distribution and arrangement of mandibular trabecular bone.
  • To evaluate the role of cortical and trabecular bone in supporting anterior teeth.

Main Methods:

  • Serial grinding of human mandible anterior sections at 0.2 mm intervals.
  • Anatomical feature tracing and computer-based reconstruction.
  • Calculation of bone porosity and periodontal space width.

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Main Results:

  • Cortical plates form the primary bony support for anterior teeth.
  • Trabecular bone is found in limited quantities, mainly in periapical regions.
  • The trabecular bone's arrangement appears random, not aligned for functional load resistance.

Conclusions:

  • The study challenges the traditional view of trabecular bone alignment in mandibular tooth support.
  • Cortical bone plays a more significant role than previously understood in supporting anterior teeth.
  • Further research is needed to fully elucidate the biomechanical function of mandibular bone structure.