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Viscoelastic properties of bovine retrodiscal tissue under tensile stress‐relaxation
Author(s) -
Tanaka Eiji,
Hanaoka Koichi,
Tanaka Masao,
Van Eijden Theo,
Iwabe Tatsunori,
Ishino Yoshihiro,
Sasaki Akiko,
Tanne Kazuo
Publication year - 2003
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.0909-8836.2003.00081.x
Subject(s) - viscoelasticity , stress relaxation , stress (linguistics) , relaxation (psychology) , ultimate tensile strength , materials science , condyle , strain (injury) , chemistry , composite material , creep , anatomy , biology , philosophy , linguistics , neuroscience
To test the hypothesis that the condylar part of the retrodiscal tissue of the temporomandibular joint exhibits resistance to tensile force, we investigated its viscoelastic properties and stress‐relaxation behavior under tension. Ten specimens were tested. Stress‐relaxation tests were conducted from four different initial stress levels. The tissue exhibited a non‐linear stress–strain relationship, which could be represented by a bilinear relation of two line segments. The stress‐relaxation curves showed a marked drop in load during the initial 10 s and after 2 min the stress reached an almost steady non‐zero level. This feature can be well represented by Kelvin's model. It is concluded that the condylar part of the retrodiscal tissue (a) exhibits a non‐linear strain‐dependent viscoelastic behavior (b), has a great capacity for energy dissipation and resistance to tensile forces, and (c) contributes to maintain the position of the disc relative to the condyle during jaw closing.