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An elastomeric material for facial prostheses: synthesis, experimental and numerical testing aspects

An elastomeric material for facial prostheses: synthesis, experimental and numerical testing aspects
An elastomeric material for facial prostheses: synthesis, experimental and numerical testing aspects
Current materials used for maxillofacial prostheses are far from ideal and there is a need for new improved materials which better simulate the tissues they are replacing. This study was based on a mixed experimental/analytical/numerical approach. A new polymeric material was developed to provide a better alternative to the materials currently used in maxillofacial prosthetics. A series of experimental tensile tests were performed in order to characterise the tensile properties of the material. A Mooney–Rivlin type hyperelastic formulation was chosen to describe the constitutive behaviour of the polymer which operates at the finite strain regime. The material parameters (two) of the constitutive law were identified with the experimental data. The Mooney–Rivlin material was found to be suitable to represent accurately the mechanical behaviour of the polymer up to 50% strain as shown by the excellent agreement between analytical and experimental results. An FE model reproducing all the characteristics of the experimental tensile tests was built and a series of three FE analyses were conducted and has proven the proper finite element implementation of the material model. This preliminary study will serve as a basis to introduce more complex features such as viscoelasticity and wrinkling of the soft polymeric structure in order to optimise the performances of the final prosthetic material.
maxillofacial prosthetics, silicone rubber, mooney–rivlin, finite element
0142-9612
5061-5066
Bellamy, Kathryn
f1bb3cd2-e891-4e53-9731-efd9ab165301
Limbert, G.
a1b88cb4-c5d9-4c6e-b6c9-7f4c4aa1c2ec
Waters, Mark G.
b8e80a5e-023a-46a6-810e-e4290339a260
Middleton, J.
e4b80942-03c3-44e8-a8cc-1cee2c925fd2
Bellamy, Kathryn
f1bb3cd2-e891-4e53-9731-efd9ab165301
Limbert, G.
a1b88cb4-c5d9-4c6e-b6c9-7f4c4aa1c2ec
Waters, Mark G.
b8e80a5e-023a-46a6-810e-e4290339a260
Middleton, J.
e4b80942-03c3-44e8-a8cc-1cee2c925fd2

Bellamy, Kathryn, Limbert, G., Waters, Mark G. and Middleton, J. (2003) An elastomeric material for facial prostheses: synthesis, experimental and numerical testing aspects. Biomaterials, 24 (27), 5061-5066. (doi:10.1016/S0142-9612(03)00412-5).

Record type: Article

Abstract

Current materials used for maxillofacial prostheses are far from ideal and there is a need for new improved materials which better simulate the tissues they are replacing. This study was based on a mixed experimental/analytical/numerical approach. A new polymeric material was developed to provide a better alternative to the materials currently used in maxillofacial prosthetics. A series of experimental tensile tests were performed in order to characterise the tensile properties of the material. A Mooney–Rivlin type hyperelastic formulation was chosen to describe the constitutive behaviour of the polymer which operates at the finite strain regime. The material parameters (two) of the constitutive law were identified with the experimental data. The Mooney–Rivlin material was found to be suitable to represent accurately the mechanical behaviour of the polymer up to 50% strain as shown by the excellent agreement between analytical and experimental results. An FE model reproducing all the characteristics of the experimental tensile tests was built and a series of three FE analyses were conducted and has proven the proper finite element implementation of the material model. This preliminary study will serve as a basis to introduce more complex features such as viscoelasticity and wrinkling of the soft polymeric structure in order to optimise the performances of the final prosthetic material.

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More information

Published date: December 2003
Keywords: maxillofacial prosthetics, silicone rubber, mooney–rivlin, finite element

Identifiers

Local EPrints ID: 68679
URI: http://eprints.soton.ac.uk/id/eprint/68679
ISSN: 0142-9612
PURE UUID: 33842acf-135c-452c-8d8d-fb88c4061a38

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Date deposited: 16 Sep 2009
Last modified: 13 Mar 2024 19:01

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Contributors

Author: Kathryn Bellamy
Author: G. Limbert
Author: Mark G. Waters
Author: J. Middleton

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