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Mandibular third molars and angle fractures.

David R Halmos·Edward Ellis·Thomas B Dodson
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Abstract

PURPOSE: The study purpose was to measure associations between mandibular third molar (M3) status/position and risk for angle fracture. MATERIALS AND METHODS: We designed a multicenter retrospective cohort study composed of patients who presented for operative management of mandible fractures. The primary predictor variable was M3 (present/absent). The secondary predictor variable was M3 position classified using the Pell and Gregory system. The outcome variable was angle fracture (present/absent). Appropriate univariate, bivariate, and multivariate logistic regression analyses were computed. The level of statistical significance was set at P </=.05. RESULTS: The study sample was composed of 1,450 subjects with a mean age of 30.6 +/- 10.4 years (range, 2 to 87 years). The risk of an angle fracture with and without M3s was 30.1% and 13.7%, respectively (adjusted odds ratio, 2.8; 95% confidence interval, 2.3 to 3.4; P <.001). Based on the Pell and Gregory classification, varying M3 position was associated with varying risks of angle fracture (P <.001). CONCLUSION: The presence of M3s was associated with a 2.8-fold increased risk for angle fractures. M3 position was associated with a variable risk for angle fracture. Notably, the deep impactions were not associated with an increased risk for fracture.

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AdolescentAdultAge FactorsAgedAged, 80 and overAnalysis of VarianceBlack PeopleChildChild, PreschoolCohort StudiesFemaleHispanic or LatinoHumansInfantLogistic ModelsMaleMandibleMandibular FracturesMiddle AgedMolar, ThirdRetrospective StudiesRisk AssessmentTooth, ImpactedWhite PeopleJournal ArticleMulticenter StudyResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

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David R Halmos, Edward Ellis, Thomas B Dodson. 2004. Mandibular third molars and angle fractures.. https://doi.org/10.1016/j.joms.2004.04.012

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