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KMID : 0355220130380030267
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Journal of Korean Academy Oral Medicine
2013 Volume.38 No. 3 p.267 ~ p.274
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Skeletal Factors Related to Open Lock of the Temporomandibular Joint
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Nam Ji-Na
Lee Jeong-Yoon
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Abstract
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This study was performed to investigate the skeletal factors related to open lock of the temporomandibular joint(TMJ). We compared the skeletal measurements on the cephalogram and transcranial radiograph among 3 groups, open lock group consisting of consecutively filed 50 patients with at least one open lock episode within recent 1 year, temporomandibular disorder(TMD) group of 50 TMD patients without open lock diagnosed by Research Diagnostic Criteria for TMD (RDC/TMD) Axis I, and normal group of 50 patients without TMD or open lock. The patients of TMD and normal group were randomly selected in an age-and-gender-matched way with ones of open lock group.
Open lock group showed smaller saddle angle than normal group on cephalograms and steeper inclination of the articular eminence than TMD and normal groups on transcranial radiographs. These results imply that the patients with the joint located more anterior and the articular eminence with steeper inclination might be riskier to TMJ open lock.
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KEYWORD
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Temporomandibular joint, Temporomandibular disorder, Open lock, Dislocation, Articular eminence
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