Evaluation of the effects of fixed partial denture on the Temporomandibular joint dysfunction by using Cadiax compact 2

Abstract

Background: The controversy surrounding the role of occlusion in temporomandibular joint (TMJ) dysfunction led to this study. Temporomandibular joint (TMJ) dysfunction has been the subject of considerable study for decades, yet despite voluminous literature, the multifactorial aetiology of temporomandibular dysfunction, is even today a cryptic issue.The cause of the signs and symptoms of TMJ dysfunction is not clearly understood and various opinions on their aetiology have been offered. The aim of study was to evaluate the effects of the occlusal interference with fixed prosthesis on the position of the terminal hinge axis and to stady the role of the occlusal interference with fixed prosthesis in the etiology of Temporomandibular joint dysfunction by using cadiax compact 2. Material and methods this study was carried out on 32 patients who came to the teaching hospital in the college of dentistry at university of al Mustansiria suffering from missing teeth and need for substitution by fixed partial denture. Everyone of the selected sample was examined in three visits with a new computerized axiography technology for recording the transverse hinge axis and Bennett movement by cadiax compact 2 and an evaluation for TMD was done by Helkimo index which was used to collect the TMJ dysfunction data, The 1st record in the 1st visit at the starting date before dental preparation, the 2nd record immediately after cementation of fixed prosthesis and the 3rd recorded 1 month after the 2nd record. Result: The results of this study showed that no effect of occlusion adjustment on TMD by using fixed partial denture even if patients have change in position of hinge axis and Bennett angle .the comparison between the angle changes in the same side of treatment shows no significant changes (p value >0.05) and that is shown also by Helkimo index because there was no score for all the patients. Conclusion Occlusion interferance does not play a major role in the aetiology of TMD; the impact of occlusion is not zero, however, and should be determined in each individual case.