Magnetic resonance images of the temporomandibular joints of patients with acquired open bite
Journal
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
Journal Volume
99
Journal Issue
6
Pages
734-742
Date Issued
2005
Author(s)
Abstract
Acquired anterior open bites were reported as the consequence of condylar collapse, which was associated with inflammatory TMJ disorders. However, we have seen such malocclusion patients whose condylar changes seemed to be related to TMJ degeneration associated with internal derangement. The aims of this study were to review the clinical history and to study the TMJ MRI of these patients. TMJ MRIs of patients, who had presented acquired anterior open bite at first visit, were retrieved from the image database for the analysis. Clinical histories focused on internal derangement were collected retrospectively. The soft tissue and hard tissue changes disclosed by MRI were also studied. All patients had experienced common signs/symptoms of TMJ internal derangement. All affected TMJs had anteriorly displaced disks and degenerative changes. Horizontally destructed condylar forms were seen significantly more frequently in these patients. TMJ degeneration associated with displaced disks might be a cause leading to the development of acquired anterior open bite.
Type
journal article