Magnetic resonance images of the temporomandibular joints of patients with acquired open bite

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...

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Published in:Oral surgery, oral medicine, oral pathology, oral radiology and endodontics oral medicine, oral pathology, oral radiology and endodontics, 2005-06, Vol.99 (6), p.734-742
Main Authors: Chen, Yunn-Jy, Shih, Tiffany Ting-Fang, Wang, Juo-Song, Wang, Huey-Yuan, Shiau, Yuh-Yuan
Format: Article
Language:English
Subjects:
Adolescent
Adult
Biological and medical sciences
Dentistry
Female
Humans
Joint Dislocations - complications
Joint Dislocations - pathology
Magnetic Resonance Imaging
Medical sciences
Occlusal Splints
Open Bite - etiology
Open Bite - pathology
Osteoarthritis - complications
Osteoarthritis - pathology
Otorhinolaryngology. Stomatology
Retrospective Studies
Temporomandibular Joint - pathology
Temporomandibular Joint Disorders - complications
Temporomandibular Joint Disorders - pathology
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Summary: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.
ISSN:1079-2104
1528-395X
DOI:10.1016/j.tripleo.2004.10.020