| An elastic-viscoplastic model for excised facial tissues. | |
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MedLine Citation:
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PMID: 10412449 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Unified constitutive equations for elastic-viscoplastic materials were modified and used to model the highly nonlinear elastic and rate-dependent inelastic response exhibited in recent experiments on excised facial tissues. These included the skin and the underlying supportive tissue SMAS (the Superficial Musculoaponeurotic System). This study indicates a number of relevant results: The skin is more strain rate dependent than the SMAS; the nonlinearity of the elasticity of the skin is greater than that of the SMAS; both tissues exhibit a hardening effect indicated by increased resistance to inelastic deformation due to stress acting over a time period; the hardening effect leads to a decrease in time dependence and an increased elastic range, which is more pronounced for SMAS. Consequently, the SMAS can be viewed as the firmer elastic foundation of the more viscous skin. Moreover, the relaxation time for the skin is fairly short so the skin would be expected to conform to the deformation of the SMAS if it remained attached to the SMAS during stretching. This is relevant when it is undesirable to separate the skin from the SMAS for physiological reasons. |
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Authors:
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M B Rubin; S R Bodner; N S Binur |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of biomechanical engineering Volume: 120 ISSN: 0148-0731 ISO Abbreviation: J Biomech Eng Publication Date: 1998 Oct |
Date Detail:
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Created Date: 1999-08-05 Completed Date: 1999-08-05 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 7909584 Medline TA: J Biomech Eng Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 686-9 Citation Subset: IM |
Affiliation:
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Faculty of Mechanical Engineering, Technion-Israel Institute of Technology, Haifa, Israel. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Connective Tissue
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physiology* Elasticity Face* Humans Models, Biological* Muscle, Skeletal / physiology* Nonlinear Dynamics* Predictive Value of Tests Rhytidoplasty Skin Physiological Phenomena* Stress, Mechanical Time Factors Viscosity Weight-Bearing / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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