Strain-rate effect on the biomechanical response of bovine temporomandibular joint disk under compression

This study evaluates the effect of strain rate on the biomechanical responses of bovine temporomandibular joint (TMJ) disk under compression. Ten specimens derived from the central region of bovine TMJ disks were used for compression tests. Each specimen was loaded upto 20% of strain with seven diff...

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Bibliographic Details
Published in:Journal of biomedical materials research 2003-12, Vol.67A (3), p.761-765
Main Authors: Tanaka, Eiji, del Pozo, Rodrigo, Tanaka, Masao, Aoyama, Junko, Hanaoka, Koichi, Nakajima, Akira, Inuzuka, Shinichi, Tanne, Kazuo
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Biomechanical Phenomena
biomechanical response
Cattle
compression
Compressive Strength
Medical sciences
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Rheology
strain rate
Stress, Mechanical
Technology. Biomaterials. Equipments. Material. Instrumentation
Temporomandibular Joint Disc - physiology
temporomandibular joint disk
viscoelasticity
Water - metabolism
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Summary:This study evaluates the effect of strain rate on the biomechanical responses of bovine temporomandibular joint (TMJ) disk under compression. Ten specimens derived from the central region of bovine TMJ disks were used for compression tests. Each specimen was loaded upto 20% of strain with seven different strain rates: 1, 10, 20, 30, 40, 50, and 60%/s. Although the stress–strain curves presented similar patterns for all the specimens, the strain‐rate effect was obvious. The linear modulus by regression fit for the linear part of the curve was significantly larger at 60%/s of strain rate than at the lower strain rates. The “supplemental stress” ratio (SSR) obviously increased with the augmentation of the strain rate. At strain rates of 30–60%/s, the SSR was significantly larger than those at strain rates below 20%/s. These findings indicate that although water easily can move through the TMJ disk at the lower strain rates, the higher strain rates make such movement difficult. It is concluded that the secondary changes of the TMJ disk may be dependent on the pattern and velocity of masticatory mandibular movements directly associated with the dynamic strain rate in the TMJ disk. © 2003 Wiley Periodicals, Inc. J Biomed Mater Res 67A: 761–765, 2003
ISSN:1549-3296
0021-9304
1552-4965
1097-4636
DOI:10.1002/jbm.a.10019