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[Pathomorphology of wedge-shaped defects].

G Meyer1, E Dawid, P Schwartz

  • 1Zentrum ZMK Universität Göttingen.

Deutsche Zahnarztliche Zeitschrift
|September 1, 1991
PubMed
Summary

Wedge-shaped defects on permanent teeth likely stem from parafunctional forces, not brushing. These dental defects involve enamel fractures and gaps, indicating a dynamic process.

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Area of Science:

  • Dentistry
  • Dental Morphology
  • Biomaterials Science

Context:

  • Wedge-shaped defects are a common finding on permanent teeth.
  • The etiology of these defects remains incompletely understood.
  • Previous research has suggested various causes, including abrasion and erosion.

Purpose:

  • To investigate the etiology of wedge-shaped defects using scanning electron microscopy (SEM).
  • To analyze the microstructural characteristics of these defects.
  • To differentiate between parafunctional force-induced defects and those caused by other factors.

Summary:

  • SEM analysis of wedge-shaped defects revealed characteristic features such as marginal surface fractures, arch-shaped enamel tears, and axial enamel rod fractures with sagittal gaps.
  • These microstructural findings suggest a dynamic process of enamel fracture.
  • The observed patterns are inconsistent with damage typically caused by improper toothbrushing techniques.

Impact:

  • This study provides evidence supporting parafunctional force application as a primary cause of wedge-shaped defects.
  • Understanding the etiology is crucial for developing effective prevention and treatment strategies.
  • The findings contribute to the broader understanding of dental hard tissue pathologies.

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