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Analysis of the four parameter linear viscoelastic model on prosthetic nucleus and the influence of manufacture on parameters of this model / 生物医学工程学杂志
Journal of Biomedical Engineering ; (6): 356-359, 2007.
Article in Chinese | WPRIM | ID: wpr-357699
ABSTRACT
The purpose of this study is to characterize the stress relax properties of PVA-H prosthetic nucleus via the four-parameter linear viscoelastic model and to analyze the influence of swelling ratio and initial PVA content upon the properties of dissipating compressive stress. The four-parameter linear viscoelastic model can simulate the viscoelastic property of prosthetic nucleus well (corr > 0.99) and be more effective than the three parameter linear viscoelastic model. From the parameters of this model we have obtained the following

results:

the prosthetic nucleus of higher water content can dissipate compressive stress more quickly than that of lower water content can do, but the quantity of stress relax can not be influenced by water content; the higher the initial PVA content,the slower and smaller the dissipation of compressive stress;the relax time of prosthetic nucleus is similar to that of human nucleus.
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Physiology / Polyvinyl Alcohol / Prostheses and Implants / Viscosity / Linear Models / Chemistry / Weight-Bearing / Compressive Strength / Elasticity / Intervertebral Disc Language: Chinese Journal: Journal of Biomedical Engineering Year: 2007 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Physiology / Polyvinyl Alcohol / Prostheses and Implants / Viscosity / Linear Models / Chemistry / Weight-Bearing / Compressive Strength / Elasticity / Intervertebral Disc Language: Chinese Journal: Journal of Biomedical Engineering Year: 2007 Type: Article