Occlusal risk factors associated with temporomandibular disorders in young adults with normal occlusions

• Published in: Oral surgery, oral medicine, oral pathology and oral radiology Vol. 114; no. 4; pp. 419 - 423
• Main Authors: Wang, Chen, Yin, Xinmin
• Format: Journal Article
• Language: English
• Published: New York, NY Mosby, Inc 01.10.2012; Elsevier
• Subjects: Adult; Biological and medical sciences; Bite Force; Case-Control Studies; Chi-Square Distribution; Dental Occlusion; Diseases of the osteoarticular system; Facial bones, jaws, teeth, parodontium: diseases, semeiology; Female; Humans; Male; Malocclusion, Angle Class I - physiopathology; Medical sciences; Miscellaneous. Osteoarticular involvement in other diseases; Non tumoral diseases; Otorhinolaryngology. Stomatology; Risk Factors; Surgery; Temporomandibular Joint Disorders - physiopathology; Human; Occlusion; Stomatology; Diseases of the osteoarticular system; Young adult; Risk factor; Arthropathy; Temporomandibular joint dysfunction; Maxillary disease
• ISSN: 2212-4403; 2212-4411; 2212-4411
• DOI: 10.1016/j.oooo.2011.10.039

The aim of this study was to characterize occlusal stability in young adults with temporomandibular disorder (TMD). 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. 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. These results suggest that a significant association exists between occlusal stability and TMD in young adults.