Prevalence of torus mandibularis among a group of elderly Japanese and its relationship with occlusal force

Abstract

Objective To examine the prevalence of torus mandibularis (TM) and identify clinical factors associated with its presence. Materials and methods A total of 664 Japanese adults over age 60 were studied by means of a questionnaire and clinical examination. Results In all, 197 subjects (29.7%) had TM. We found a significant association between the presence of TM and torus palatinus (TP; 45.1% vs. 26.5%, p < 0.001). Moreover, occlusal force with TM was significantly higher than without TM (p < 0.05). Logistic regression adjusted for age and occlusal force revealed a significant relationship between TM and occlusal force and TP [p = 0.005, odds ratio (OR) = 2.44; p < 0.001, OR = 2.66, respectively]. Conclusion This study suggests that there is a relationship between TM and factors related to occlusal factor. © 2012 The Gerodontology Society and John Wiley & Sons A/S.