An Orthodontic Approach to a Case of Malocclusion with Associated Abnormalities in Jaw Function

Abstract

In recent years there has been a tendency towards an increase in adult malocclusion patients. Many of these cases are associated with factors complicating treatment, such as abnormalities in jaw function, esthetic demands of the patient, and problems with the periodontium, anchor teeth, mechanics, and restoration of the teeth.
Considering Loisella's report that orthodontic treatment is one factor inducing abnormalities in jaw function, it becomes imperative to devise a treatment plan using adequate data gathering and planning, and to monitor the postoperative course by regular examinations after completitn of the active orthodontic treatment. Therefore, in order to accurately diagnose abnormalities of the jaw at our clinic, we endeavor to make maximum utilization of both MRI and standardized TMJ radiographs, the SAM system developed by Slavicek, and questionnaires given at the initial examination.
Treatment of abnormalities in jaw function is most often carried out by the two step method of using a splint to modify the position of the mandible and improve symptoms, followed by reconstruction of the occlusion to stabilize and maintain the mandibular position. Although occlusal reconstruction is generally carried out by prosthetic methods, the use of orthodontic treatment has been brought forward as an effective modality. Reports have been presented by Roth, Sato, Ishikawa, Matsumoto, Tsuzuki and Machiya.
In this paper we report and discuss the case of an adult with an anterior open bite treated by orthodontic methods. We investigated anterior guidance, posterior support, and posterior guidance, examined radiographs of both temporomandibular joints, and investigated the periodontal tissues and locatinn of missing teeth.