1998 Volume 26 Issue 1 Pages 31-38
The purpose of this study was to evaluate the relationship between the behavioral and mental factors, and TMD signs and/or symptoms in orthodontic patients. A total of 208 orthodontic patients (68 males, 140 females, mean age : 23.6 years old) were selected as the subjects, and were divided into 3 groups ; NS group was 59 patients with no TMD symptoms, SNT group was 98 patients with TMD symptoms who haven't received TMD therapy, and ST group was 51 patients with TMD symptoms and have received TMD therapy. Further, the follow-up study was carried out excluding surgical cases in 93 patients (NS : 17, SNT : 47, ST : 29), and it was compared with the previous questionnaire survey. The results were as follows ; 1. The incidence of patients in SNT increased with age and that in NS decreased. ST did not change with age. 2. The prevalence of patients who had the history of three symptoms was 48.0% in SNT and 90.2% in ST. 3. Following the follow-up study, overall condition of TMD didn't become worse in 3 groups. But in most of SNT groups, TMD sounds still remained. 4. The questionnaire survey suggested that in SNT and ST groups, there was a relationship between TMD symptoms and mastication of big and hard food, unilateral chewing, grinding, clenching, resting one's cheek on one's hand, abnormal sleeping position, and insecurity and anxiety.
