Resorption of the lateral pole of the mandibular condyle in temporomandibular disc displacement.
OBJECTIVE
To assess the possible relationship between resorption of the superolateral pole of the mandible condyle (RSLC) and TMJ disk displacement.


METHODS
Two hundred and seventeen TMJs in 138 patients were studied. Displacement of the disc, degree of displacement and disc configuration were assessed using MRI. RSLC was assessed from a transorbital radiograph.


RESULTS
Seventy-two joints (37%) were considered to have RSLC. A significantly higher prevalence of RSLC was found in joints with disc displacement (goodness test of fit for chi-square, P<0.05). A significantly higher prevalence of RSLC was found in joints with advanced disc displacement and advanced disk deformation (Mann-Whitney U-test, P<0.01).


CONCLUSIONS
RSLC appears more likely to occur in joints with advanced disc displacement.
Kurita
H
H
Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Japan.
Ohtsuka
A
A
Kobayashi
H
H
Kurashina
K
K
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001862:Bone Resorption / Q000473:pathology*; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D008335:Mandibular Condyle / Q000473:pathology*; D008336:Mandibular Diseases / Q000150:complications; D008875:Middle Aged; D018709:Statistics, Nonparametric; D019224:Temporomandibular Joint Disc / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000150:complications / Q000473:pathology*