The Relative Study Between the Bad Habit of the Adolescent and the TMD

Objective: To evaluate the relationship among oral bad habit ,malocclusion and TMD in children and adolescent. Methods: In this article ,oral bad habit and clinical findings from 106 children cases diagnosed as Temporomandibular Disorders(TMD)with malocclusion were investigated. Using standardized interview questionnaire, joint palpation and schuler position X-ray photography to evaluate TMJ condition. Results: The proportion of TMD patients within 15～17years old is the most. About 57.6% of TMD patients have distinctive bad habit and lip habit is the most. The occuring proporton of malocclusion and TMD adolescent is clearly high and the difference is prominence (P0.005). Conclusions: The interaction among oral bad habit ,malocclusion and TMD is significant. For the bad habit of the adolescent ,there is an imporent effect on development of malocclusion and the happenings of TMD.