Magnetic resonance imaging diagnosis of the temporomandibular joint in patients with orthodontic appliances.
OBJECTIVE
The purpose of this study was to investigate the accuracy of magnetic resonance imaging diagnosis of the temporomandibular joint in those with orthodontic appliances by comparing magnetic resonance images of the temporomandibular joints with and without orthodontic appliances.


METHODS
Magnetic resonance imaging was performed in a total of 20 temporomandibular joints before and after the insertion of 6 kinds of orthodontic appliances (types 1-6), and the magnetic resonance images were compared.


RESULTS
With respect to disk position, the diagnostic accuracy was 80%, 75%, 70%, 70%, 65%, and 60% in order from type 1 through type 6. The distribution of stages for the assessment of condylar configurations was 80%, 55%, 40%, 40%, 20%, and 10% in order from type 1 through type 6. No significant changes were found in the condylar head marrow signals.


CONCLUSIONS
Magnetic resonance imaging is performed in orthodontic patients preferably by using ceramic brackets in the front teeth and direct bonding tubes in the molar teeth while removing arch wires.
Okano
Yoshie
Y
Nihon University at Matsudo, Department of Orthodontics, School of Dentistry, Sakaecho-Nishi, Matsudo, Chiba, Japan. okano@mascat.nihon-u.ac.jp
Yamashiro
Mitsuaki
M
Kaneda
Takashi
T
Kasai
Kazutaka
K
D000328:Adult; D016477:Artifacts; D002516:Ceramics; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology; D008670:Metals; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D012680:Sensitivity and Specificity; D019224:Temporomandibular Joint Disc / Q000473:pathology; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis*
D008670:Metals