A case of articular disc displacement Improved by mandibular positioning appliance and occlusal treatment

MRI verification of IIIa and IIIb reduction

Abstract

More than 70％ of patients who visit to the dental office have temporomandibular joint (TMJ) symptoms such as TMJ noise, mouth opening limitation and pain in the masticatory muscles and TMJ area, often with internalized symptoms of clenching and bruxism grinding. We dentists cannot avoid this point. In papers and case reports on IIIa-with reduction and IIIbwithout reduction of the TMJ disc disorder (type III), it is said that it is difficult to improve the improvement of joint disc repositioning and reduction. Therefore, we examined this issue by MRI and found many cases of improvement in articular disc displacement reduction. In this paper, we would like to report a case in which bilateral articular discs on the left side (IIIa) and the right side (IIIb) were repositioned. Changing the occlusion altered the anterior and lateral guidance, and the anteriorly displaced articular discs were repositioned and continued to function normally afterwards.