Biomechanical response of bovine temporomandibular joint disc to prolonged tensile stress

被引:4
|
作者
Tanaka, E
Aoyama, J
Tanaka, A
Watanabe, M
Hattori, Y
Hanaoka, K
Tanne, K
机构
[1] Hiroshima Univ, Fac Dent, Dept Orthodont, Minami Ku, Hiroshima 7348553, Japan
[2] Osaka Univ, Sch Engn Sci, Div Mech Sci, Dept Syst & Human Sci, Osaka 5608531, Japan
关键词
articular disc; biomechanics; creep; strain; temporomandibular joint; viscoelasticity;
D O I
10.1016/S0003-9969(02)00013-4
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
This study was designed to evaluate the influence of prolonged tensile stress on the viscoelasticity of the temporomandibular joint (TMJ) disc. Twenty discs from 10, 3-year-old cattles were used. Tensile stress of 1.5 MPa was applied to specimens from the discs for 10, 20, 40 and 60 min. Following the prescribed period of tension for creep, the specimens were removed from the tension device and any recovery observed for 20 min. In all specimens, strain increased at the onset of stress application and reached almost steady conditions after 5 min. Although, the strain became slightly larger when the creep time was longer, no significant differences were found in the strains between any two tests with different periods of creep. The residual strain increased significantly with creep duration, and similarly the degree of recovery decreased significantly. In 10- and 20-min creep tests, the residual strains were 0.1 and 1.0%, the specimens in 40- and 60-min tests revealed irreversible changes in length. It was concluded that continuous loading for >40 min causes creep damage in bovine TMJ disc, and that prolonged sustained tension affects the recovery of joint homeostasis. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:413 / 416
页数:4
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