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Related Experiment Videos

Changes in the mandibular angle in the edentulous state.

D M Casey1, L J Emrich

  • 1Department of Removable Prosthodontics, State University of New York, University at Buffalo, School of Dental Medicine.

The Journal of Prosthetic Dentistry
|March 1, 1988
PubMed
Summary

The mandibular angle slightly widens in the edentulous state, contrary to some textbook claims. This study quanties the slight increase in mandibular angle in edentulous individuals.

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Area of Science:

  • Dental Anatomy
  • Oral Surgery
  • Radiographic Analysis

Background:

  • Textbooks often state the mandibular angle widens in edentulous individuals, but evidence is conflicting.
  • Existing literature presents contradictory findings regarding mandibular angle changes after tooth loss.

Purpose of the Study:

  • To investigate and quantify changes in the mandibular angle in the edentulous state.
  • To address the disparity in scientific literature regarding mandibular angle widening.

Main Methods:

  • Analysis of Panelipse radiographs from 34 edentulous male patients who never wore dentures.
  • Measurement of 68 mandibular angles to assess changes in the edentulous state.

Main Results:

  • A statistically significant mean increase of 2.4 degrees in the mandibular angle was observed in the edentulous state (p = .001).

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  • The mean edentulous mandibular angle was 126.3 degrees, which is considerably less than the 140 degrees cited in some anatomical texts.
  • Preliminary findings suggest that dentures may not prevent mandibular angle widening.

    • Conclusions:

    • The mandibular angle shows a slight widening in the edentulous state.
    • Statements regarding mandibular angle widening in edentulism should be qualified as 'slight widening.'
    • Further research is needed to definitively refute or confirm the role of dentures in mandibular angle changes.