validation of an experimental polyurethane model for biomechanical studies on implant-supported prosthesis: compression tests

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ID: 194021
2011
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Abstract
OBJECTIVES: The complexity and heterogeneity of human bone, as well as ethical issues, most always hinder the performance of clinical trials. Thus, in vitro studies become an important source of information for the understanding of biomechanical events on implant-supported prostheses, although study results cannot be considered reliable unless validation studies are conducted. The purpose of this work was to validate an artificial experimental model based on its modulus of elasticity, to simulate the performance of human bone in vivo in biomechanical studies of implant-supported prostheses. MATERIAL AND METHODS: In this study, fast-curing polyurethane (F16 polyurethane, Axson) was used to build 40 specimens that were divided into five groups. The following reagent ratios (part A/part B) were used: Group A (0.5/1.0), Group B (0.8/1.0), Group C (1.0/1.0), Group D (1.2/1.0), and Group E (1.5/1.0). A universal testing machine (Kratos model K - 2000 MP) was used to measure modulus of elasticity values by compression. RESULTS: Mean modulus of elasticity values were: Group A - 389.72 MPa, Group B - 529.19 MPa, Group C - 571.11 MPa, Group D - 470.35 MPa, Group E - 437.36 MPa. CONCLUSION: The best mechanical characteristics and modulus of elasticity value comparable to that of human trabecular bone were obtained when A/B ratio was 1:1.
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Authors ;Rafael Tobias Moretti Neto;Daniel Afonso Hiramatsu;Valdey Suedam;Paulo César Rodrigues Conti;José Henrique Rubo
Journal journal of animal and plant sciences
Year 2011
DOI
10.1590/S1678-77572011000100010
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572011000100010
Keywords
validation studies

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