下顎関節突起骨折治癒に関する実験的研究 : 小骨片非偏位例における短期顎間固定下での治癒過程について

概要

論文の詳細を見る
In cases of fracture of the condylar process of the mandible, especially those occurring unilaterally, conservative treatment consisting of short-term intermaxillary fixation ordinarilly achieves good results with a favorable prognosis.However, with regard to the indcations for this treatment, little detailed investigation or supporting experimental research has been reported.<BR>In this study, using mature rats, after one week of inter-maxillary fixation, the bone healing process was investigated in relation to performance of mastication movement.<BR>One week following bone fracture, that is, at the time of remove of intermaxillary fixation, all the cases of interior displacement of the minor fragment had recovered and showed normal positioning.However, from the second week following removal of intermaxillary fixation, shrinkage of the head of the mandibular condyloid process was evident, with this tendency continuing up to the sixth week.Formation of replacement bone did include some cartilaginous ossification, but consisted mostly of intramembranous ossification.At the time of removal of intermaxillary fixation, no healing of the bone fracture was evident, however during the second week following the bone fracture, or the first week following removal of intermaxillary fixation, the process began and bone healing was visible in some cases, and in third week it was visible in all cases.During the sixth week, normal medullary cavities and tissue were also seen.Observation at six months following bone fracture revealed some shrinkage of the head of the mandibular condyloid process in few cases, but for the most part, observations were normal.

下顎関節突起骨折治癒に関する実験的研究 : 小骨片非偏位例における短期顎間固定下での治癒過程について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク