Non-linear Viscoelastic Model for Behaviour Characterization of Temporomandibular Joint Discs

作者：Lamela M J^*; Prado Y; Fernandez P; Fernandez Canteli A; Tanaka E

来源：Experimental Mechanics, 2011, 51(8): 1435-1440.

DOI：10.1007/s11340-011-9465-4

• TMJ
• Viscoelasticity
• Testing
• Non-linear behaviour
• Prony's series

Generally, the complex behaviour of the disc of the temporomandibular joint (TMJ) cannot be adequately represented using linear elastic or linear viscoelastic models. Since the disc is regularly subjected to large strain and stress levels, the study of its non-linear response under compression is of practical interest, especially for analysis of medical dysfunctions. With this aim, relaxation and creep tests were carried out using round specimens of diameters ranging between 4 and 6 mm cut off from the central, anterior, posterior, lateral and medial zones of porcine discs to investigate the regional mechanical properties differences. The experimental data results are fitted using Prony series, based on generalized Maxwell and Kelvin models, allowing the relaxation and creep moduli to be represented, respectively, as a function of the strain and stress. The results show that the non-linear material behaviour of this biological tissue is properly described by the proposed models, to be considered subsequently in numerical calculations.

• 出版日期2011-10