Study on conservative treatments for internal derangement of TMJ(closed lock). The relation between a duration of closed lock and arthrographic deformity of disk.:The relation between a duration of closed lock and arthrographic deformity of disk

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Internal derangement of temporomandibular joint has been studied mainly arthrographically about disk position, but it was reported that morphologic alterations and histochemical changes of disk were frequently observed in joints with internal derangement.<BR>In this study we analysed the relationship between a duration of closed lock and arthrographic deformity of disk, efficacy of conservative treatments. Arthrographic deformities of disk were seldom seen in cases of closed lock with a duration of less than 5 months, but they were frequently seen in cases with longer duration than 5 months. We recaptured the anterior displaced disks with conservative treatments. In these cases duration was less than 5 months, and we could not observe arthrographic deformity or disk of any other arthrographic abnormality.<BR>Consequently it is suggested that when the duration of closed lock passes about 5 months, the changes of the intracapsular tissue become severe until we cannot reduce the anterior displaced disk with any conservative treatments.
特定非営利活動法人日本口腔科学会の論文