家兎顎関節に対する円板後部組織の全層切開と縫合（関節円板整位術）後の修復過程と関節構造に及ぼす実験的研究

Abstract

Histological and morphologic changes after surgical incisions at the junction of the disk and retrodiscal tissue (disk plication surgery) on rabbit temporomandibular joint (TMJ) were studied. The experimental groups of a total of 20 animals were divided into three groups; i. e. disk plication surgery, simple arthrotomy on the upper joint cavity, and arthrotomy on both upper and lower joint cavity (sham operation group).The results were obtained as follows:1. In four weeks after surgery, the incision at the junction of the disk and retrodiscal tissue had healed without any abnormal episode on TMJ structure. At 24 weeks after surgery, neither significant morphologic change of the TMJ nor destructive change was observed.2. No significant abnormal change of TNIJ structures was induced by simple arthrotomy on both upper and lower joint cavities at the 24 weeks post-operative observation.