Imaging of temporomandibular joint ankylosis. A new radiographic classification.
OBJECTIVE
To compare the pre-operative clinical and radiographic findings of temporomandibular joint (TMJ) ankylosis with those found at operation and propose new classification.


METHODS
Thirty-three patients were treated for TMJ ankylosis. There were 18 unilateral and 12 bilateral cases. All patients underwent pre-operative clinical and radiographic examination, (consisting of a panoramic radiograph, axial and coronal CT. The surgical findings were compared with the imaging features.


RESULTS
Post-contrast coronal CT was the best imaging modality for planning surgery as it displayed the anatomical relationship between the ankylosed segment and the surrounding vital structures, particularly where the sphenoid and temporal bones were involved.


CONCLUSIONS
Surgical planning should be based on coronal and axial CT. A new classification of TMJ ankylosis based on the CT findings is proposed.
El-Hakim
Ibrahim E
IE
Department of Oral and Maxillofacial Surgery, School of Dentistry, Ain Shams University, 6 El-Gendy Street, Hadayek Helwan 11433, Cairo, Egypt. imelhakim@hotmail.com
Metwalli
S A
SA
D000293:Adolescent; D000328:Adult; D000844:Ankylosis / Q000145:classification / Q000000981:diagnostic imaging* / Q000601:surgery; D001178:Arthroplasty; D002648:Child; D002675:Child, Preschool; D003287:Contrast Media; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008297:Male; D008335:Mandibular Condyle / Q000601:surgery; D008438:Maxillary Artery / Q000000981:diagnostic imaging; D010027:Osteotomy / Q000295:instrumentation; D010347:Patient Care Planning; D011300:Preoperative Care; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D013100:Sphenoid Bone / Q000000981:diagnostic imaging; D013701:Temporal Bone / Q000000981:diagnostic imaging; D013705:Temporomandibular Joint Disorders / Q000145:classification / Q000000981:diagnostic imaging* / Q000601:surgery; D000267:Tissue Adhesions / Q000601:surgery; D014057:Tomography, X-Ray Computed / Q000379:methods
D003287:Contrast Media