The Prevalence of Torus Mandibularis in Young Healthy Dentate Subjects

Publication date: Available online 10 May 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Koji Morita, Hiroki Tsuka, Tomoaki Shintani, Mitsuyoshi Yoshida, Hidemi Kurihara, Kazuhiro Tsuga
PurposeThere have only been few reports on the prevalence of torus mandibularis (TM) among young subjects, and TM can have various adverse effects on oral/occlusal states in middle-aged patients. This study was designed to determine the association between TM status and the oral/occlusal state in young healthy dentate subjects.MethodsThis was a cross-sectional study; the sample population included students at Hiroshima University who participated for practice education. The predictor variables in this study included oral symptoms (temporomandibular joint noise, tooth clenching and grinding, buccal mucosa ridging, dental attrition, and tongue habit), oral anatomy (occlusal vertical dimension), and oral function (average occlusal pressure, occlusal contact area, and maximum voluntary tongue pressure). The outcome variable was TM status (present or absent). Additional variables were demographic in nature and included age, number of residual teeth, body weight, and gender. These variables were compared among subjects with and without TM using univariate analysis and multiple logistic regression analysis. Statistical analyses were carried out using SPSS Statistics version 19 for Windows; P < 0.05 was considered significant.ResultsOf 204 subjects included in the study, 50% were men and 50% were women. The mean age was 22.4 ± 2.7 years. TM was present in 119 (58.3%) subjects. The multiple logistic regression analysis revealed that TM status was associated with dental attrition and occlusal contact area (P < 0.05).ConclusionsThis study revealed that TM was present in over half of the young healthy dentate subjects and was closely associated with dental attrition and occlusal contact area. This study will provide readers with useful information to help prevent TM development before middle age.



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