INTRACAPSULAR PATHOLOGICAL PROCESS CAUSED BY TMJ DISK DISPLACEMNT IN SHEEP

Research Project

Project/Area Number	07672201
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Surgical dentistry
Research Institution	AICHI-GAKUIN UNIVERSITY,SCHOOL OF DENTISTRY
Principal Investigator	KURITA Kenichi AICHI-GAKUIN UNIVERSITY SCHOOL OF DENTISTRY ASSOCIATE PROFESSOR, 歯学部, 助教授 (40133483)
Co-Investigator(Kenkyū-buntansha)	HONDA Yujiro GIFU UNIVERSITY SCHOOL OF MEDICINE ASSISTANT PROFESSOR, 医学部, 講師 (50165049) OGI Nobumi AICHI-GAKUIN UNIVERSITY SCHOOL OF DENTISTRY ASSISTNAT PROFESSOR, 歯学部, 講師 (90211127) KAWAI Tsuyoshi AICHI-GAKUIN UNIVERSITY SCHOOL OF DENTISTRY PROFESSOR, 歯学部, 教授 (50064788)
Project Period (FY)	1995 – 1996
Project Status	Completed (Fiscal Year 1996)
Budget Amount *help	¥2,200,000 (Direct Cost: ¥2,200,000) Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000) Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywords	TEMPORMANDIBULAR JOINT / DISK DISPLACEMENT / SHEEP / OSTEOARTHRITIS / 顎関節症 / 顎関節内障
Research Abstract	Purpose : Aim of this study was to find intracapsular pathological process caused by TMJ disk displacement in sheep. Method : In the first group the anterior, lateral and posterior margin of the disk was resected and left inside the capsule. In the second group the resected disk as performed in the first group was medially pushed. Frequency of disk displacement, disk deformity, disk perforation and osseous changes of the condyle were compared between the two groups. Six joints of three sheep were used in each group. Result : First group Second group Disk displacement 16% 67% Disk deformity 16% 67% Disk perforation 33% 83% Osseous changes 33% 83% It is possible to make animal model of disk displacement associated with osseous changes of the condyles by pushing the disk medially in sheep. This model is useful for further investigation about the pathogenesis of TMJ disk displacement and the following osseous changes.