2465 Study on Bruxism Behavior of Temporomandiblar Disorder Patients
T. ISHIKAWA1, T. HAKETA1, K. KINO1, F. SATO1, M. SUGISAKI2, Y. AMEMORI1, Y. WATANABE1, T. SHIBUYA1, H. TANABE2, T. AMAGASA1, and H. WAKE1, 1Tokyo Medical & Dental University, Japan, 2Jikei University School of Medicine, Tokyo, Japan

Objectives: This study examined relationship between life, psychological and pain conditions and bruxism behaviour by analyzing results of multi-dimensional questionnaire. Methods: Consecutively selected 176 TMD patients were enrolled in this study. They were asked to fill out questionnaire regarding current pain intensity, Hospital Anxiety and Depression Scale for anxiety and depression, and 24 items about their habits, work environment and bruxism behavior. On the bases of bruxism related questionnaire, patients were divided into Bruxism group (n=147) and non-Bruxism group (n=29). Patients (1) who are aware of their bruxism by themselves, (2) whose family indicated their bruxism, (3) who had difficulty of mouth opening upon waking were categorized into bruxism patient group. Firstly, stepwise logistic regression analyses were conducted between dependent variables, which were Bruxism /non-Bruxism group and independent variables, which were age, sex, visual analogue scale of current pain, HADS score, and habits and work environment factors. Furthermore, in sleep disorder group (n=114) and in non-sleep disorder group (n=62) which were classified by the sleep related questionnaire, same analyses were performed respectively. Results: Observed significant factors which characterize bruxism group were sex (OR 0.214), current pain intensity (OR 0.784), HADS anxiety level (OR2.466) and stress caused by human relations (OR3.233). In sleep disorder group, HADS anxiety level (OR 3.166) and overwhelmed work (OR 0.179) and in non-sleep disorder group, teeth contacting habit (OR 4.761) and stress cased by human relations (OR 7.695) were revealed to be significant in patients with bruxism behavior. Conclusion: Bruxism behavior in TMD patients are more likely observed in patients with higher anxiety level, with higher life stress and in female. Moreover, teeth contacting habit would aggravate bruxism behavior in non-sleep disorder group. The study showed that influential factor towards Bruxism is different between sleep disorder group and non-sleep disorder group.

Seq #248 - Orofacial Sensory Motor Function
10:15 AM-11:30 AM, Friday, 12 March 2004 Hawaii Convention Center Exhibit Hall 1-2

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