Chen Wang1, Xinmin Yin. 1. Institute of Stomatology, Nanjing Medical University and Department of Prosthodontics, Stomatologic Hospital affiliated to Nanjing Medical University, Nanjing, China.
Abstract
OBJECTIVE: The aim of this study was to characterize occlusal stability in young adults with temporomandibular disorder (TMD). STUDY DESIGN: Thirty-one patients (aged 19-31 years) with complete natural dentition and Angle class I occlusion who exhibited TMD were compared with 31 age- and sex-matched healthy control subjects. The occlusal registrations were performed using the T-Scan II occlusal imaging and analysis system. Center of occlusal force, asymmetry index of occlusal force, maximal movement of COF, premature contacts, clusion time, and disclusion time were recorded. RESULTS: Compared with control subjects, TMD subjects had a significantly higher frequency of premature contacts (16/32, 50.0%) and greater bilateral asymmetry in the occlusal force. Furthermore, prolonged clusion time and disclusion time also were observed in TMD subjects. CONCLUSIONS: These results suggest that a significant association exists between occlusal stability and TMD in young adults.
OBJECTIVE: The aim of this study was to characterize occlusal stability in young adults with temporomandibular disorder (TMD). STUDY DESIGN: Thirty-one patients (aged 19-31 years) with complete natural dentition and Angle class I occlusion who exhibited TMD were compared with 31 age- and sex-matched healthy control subjects. The occlusal registrations were performed using the T-Scan II occlusal imaging and analysis system. Center of occlusal force, asymmetry index of occlusal force, maximal movement of COF, premature contacts, clusion time, and disclusion time were recorded. RESULTS: Compared with control subjects, TMD subjects had a significantly higher frequency of premature contacts (16/32, 50.0%) and greater bilateral asymmetry in the occlusal force. Furthermore, prolonged clusion time and disclusion time also were observed in TMD subjects. CONCLUSIONS: These results suggest that a significant association exists between occlusal stability and TMD in young adults.