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Adaptive alterations of elastic fibers in the bilaminar zone of rabbit temporomandibular joint following disc displacement

引用

Chinese Medical Journal 2002年第12期115卷 1772-1776,144页

作者：谷志远吴慧玲冯剑颖柴田考典胡济安张银凯谢志坚浙江大学医学院附属口腔医院口腔颌面外科杭州310006 浙江大学医学院附属第一医院外科杭州310006 日本山形大学医学部口腔颌面外科

OBJECTIVE: To study the adaptive alterations of elastic fibers in the bilaminar zone (BZ) of rabbit temporomandibular joint (TMJ) following disc displacement. METHODS: Twenty-eight Japanese white rabbits were used in this study. The right temporomandibular joints of 20 of 28 rabbits were subjected to the surgical procedure of anterior disc displacement (ADD). Four rabbits in the surgical group were sacrificed at 2, 4, 6, 8 and 12 weeks after operation. Their temporomandibular joints were studied histochemically. RESULTS: Elastic fibers were reduced in number and ran irregularly in the superior lamina of BZ from ADD rabbits. The jungly elastic fibers (EFs) could still be seen at 2 weeks after operation. At 4 weeks, the number of EFs decreased significantly; EFs lost their jungly arrangement and were shaped like rough dots, of which the arrangement and the lengths were different. Six weeks after operation, many EFs were replaced by distorted, uneven, non-oriented fine EFs, distributed unevenly and some thick or fine EFs that ran irregularly. The number of EFs decreased further and their arrangement was more deranged at 8 weeks. At 10 and 12 weeks, EFs in the superior lamina of BZ were similar to those at 8 weeks. CONCLUSION: Our results show that EFs lost their function as well as their distribution and arrangement after disc displacement.

关键词： Adaptation, Physiological Animals Behavior, Animal Dislocations Elastic Tissue Extracellular Matrix Rabbits temporomandibular joint disk temporomandibular joint Disorders

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