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Related Experiment Videos

Pathologic change in soft tissues associated with radiographically 'normal' third molar impactions.

J W Glosser1, J H Campbell

  • 1Department of Oral Medicine, Pathology, and Surgery, University of Michigan, Ann Arbor, USA.

The British Journal of Oral & Maxillofacial Surgery
|September 4, 1999
PubMed
Summary

Histological examination revealed a higher incidence of dentigerous cysts in impacted third molar teeth than typically shown on radiographs alone. This highlights the importance of microscopic analysis for accurate diagnosis.

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Area of Science:

  • Oral pathology
  • Dentistry
  • Histopathology

Background:

  • Radiographs often fail to detect subtle pathological conditions.
  • Impacted third molars can harbor asymptomatic soft tissue abnormalities.

Purpose of the Study:

  • To determine the incidence of histological abnormalities in soft tissues surrounding impacted third molars.
  • To compare histological findings with radiographic assessments.

Main Methods:

  • Collected 96 dental follicles from impacted third molars in 63 patients.
  • Radiographic assessment showed no follicular space greater than 2.4 mm.
  • Three oral pathologists independently diagnosed specimens; only consistent cystic diagnoses were considered diseased.

Main Results:

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  • A dentigerous cyst diagnosis was confirmed in 31 of 96 specimens (32.3%).
  • Mandibular specimens showed a 37% incidence (22/60), while maxillary specimens showed a 25% incidence (9/36).
  • No other pathological conditions were identified.

Conclusions:

  • The incidence of dentigerous cysts associated with impacted third molars is significantly higher when assessed histologically compared to radiographic studies alone.
  • Microscopic evaluation is crucial for accurate diagnosis and understanding the true prevalence of dentigerous cysts.