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Related Experiment Videos

Risk indicators for posterior tooth fracture.

James D Bader1, Daniel A Shugars, Jean A Martin

  • 1Department of Operative Dentistry, School of Dentistry, University of North Carolina, Chapel Hill 27599-7450, USA. jim_bader@unc.edu

Journal of the American Dental Association (1939)
|September 10, 2004
PubMed
Summary

The presence of a fracture line and a large restoration volume are key indicators of cusp fracture risk in posterior teeth. These findings help dentists better assess and manage fracture risk for improved patient outcomes.

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Area of Science:

  • Dental science
  • Restorative dentistry
  • Clinical risk assessment

Background:

  • Cusp fracture risk in posterior teeth is difficult to determine accurately.
  • Existing risk indicators lack controlled observational data, leading to variable dentist assessments.

Purpose of the Study:

  • To identify and validate clinical risk indicators for cusp fracture in restored posterior teeth.
  • To develop predictive models for cusp fracture risk.

Main Methods:

  • A case-control study involving 200 patients with fractures and 252 without.
  • Evaluation of 39 potential risk indicators, including patient characteristics and tooth-specific factors.
  • Logistic regression analysis to identify significant predictors of fracture.

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Main Results:

  • A detectable fracture line and a higher proportion of restoration volume significantly increased fracture odds (P < .001).
  • Subject age and measures of restoration size or loss of dentinal support were also associated with fracture.
  • Patient behaviors (clenching, grinding) and occlusal factors were not strong predictors.

Conclusions:

  • The presence of a fracture line and the proportional volume of the restoration are strongly linked to cusp fracture risk.
  • Dentists should consider these features as critical indicators of elevated fracture risk in posterior teeth with restorations.