Chnnges of the ultrastructures of temporomandibular joint after removal of emotional stress factors in rats
10.3760/cma.j.issn.1002-0098.2009.01.006
- VernacularTitle:应激原去除后大鼠颞下颌关节超微结构的变化
- Author:
Jun LIANG
1
;
Min HU
;
Ling-Ling E
;
Wei-Sheng WEN
;
Dong-Sheng WANG
;
Ye-Hua HAN
Author Information
1. 解放军第518医院
- Keywords:
Temporemandibular joint;
Stress,psychological;
Ultragtructure
- From:
Chinese Journal of Stomatology
2009;44(1):19-23
- CountryChina
- Language:Chinese
-
Abstract:
Objective To examine the changes of the ultragtructures of temporomandibular joint after removal of the emotional stress factors in rats.Methods Thirty-two 12-week-old male Wistar rats were divided into two groups randomly,experimental group and control group.Each group was divided into two subgroups according to execution time,9-week subgroup and 12-week subgroup with eight rats in each subgroup.Chronic unpredictable stress animal model were firstly established in experimental group in the first 6 weeks,then all the stimulation factors removed and breed normally.After 9 weeks,rats in 9-week subgroup were killed.After 12 weeks,rats in 12-week subgroup were killed.All condyles and articular discs were dissected and observed by scanning electron microscope. Results There wag some recovery in condyles and articular discs in experimental group under scanning electron microscope.The gelatum on the surface of condyles increased,collagen fibrils became regular and deep layer collagen fibrils less exposed.There were no such obvious changes on the surface of condyles and articular discs in control group.Conclusions The ultrastructure injures of temporomandibular joint in rats induced by emotional stress could be reversed if the stress factors were removed.
