MR image findings on advanced internal derangement of the temporomandibular joints-Cases of disc position changed from anterior disc displacement with reduction to without reduction-:Cases of disc position changed from anterior disc displacement with redu

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This study was designed to evaluate the suggestion that the clinical findings and MR image findings of an teriordisc displacement with reduction cases could not reduce the disc displacement within the follow-up period.<BR>We selected 26 joints without remarkable bone chang esin the condylar head or glenoid fossa in which reduc tiondisappeared during follow-up. Clinical evaluation focused on temporomandibular pain, trismus, and joint sound. MR imaging was targeted for configuration of articular disc, degree of disc displacement, and condylar head position.<BR>Clinical signs observed with progression of the conditionwere disappearance of joint sound in 12/26 joints (46.1%), temporomandibular pain in 15/26 joints (57.6%), and decreased distance of opening mouth in 19/26 joints (73%). MR image findings were disc configuration changes in 12/26 joints (46.1%), increased degree of an teriordisplacement of disc in 20/26 joints (76.9%), and condylar head position changes in 9/26 joints (34.6%).<BR>It is suggested that the advanced stage of internal de rangementis closely associated with the degree of disc displacement.
特定非営利活動法人日本口腔科学会の論文