Estudo da causa de falhas dos aços inoxidáveis austeníticos utilizados em implantes ortopédicos

• Ano de defesa: 2010
• Autor(a) principal: Vitor, Everaldo
• Orientador(a): Carrió, Juan Alfredo Guevara
• Banca de defesa: Vatavuk, Jan , Mercadante, Marcelo Tomanik
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Presbiteriana Mackenzie
• Programa de Pós-Graduação: Engenharia de Materiais
• Departamento: Engenharia de Materiais
• País: BR
• Palavras-chave em Português: implantes; aços inoxidáveis austeníticos; corrosão
• Palavras-chave em Inglês: implants; austenitic stainless steels; corrosion
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: http://dspace.mackenzie.br/handle/10899/24208

Given the variety of metallic materials used in orthopedic implants, the austenitic stainless steel type 316L and F138 have been widely used in Brazil as biocompatible material. Used by the public health, mainly due to it is low cost of manufacture compared to other materials, and because of the good combination of properties of which can be highlighted: The biocompatibility, the mechanical strength and corrosion resistance. However, these materials in contact with physiological fluids of the human body, allow the emergence of mechanisms of degradation such as corrosion, causing adverse reactions to patients.This fact causing possible premature failure of these implants, thus causing inconvenience to them and an additional cost the Unified Health System (SUS) replacement in these products. This work was developed in partnership with the Department of Graduate Studies of Engineering Materials, University of Mackenzie and the Department of Orthopedics and Tramautolog, Santa Casa de Misericordia de São Paulo (DOT-SCM-SP), motivated to perform a research study of the quality of orthopedic surgical implants, particularly osteosynthesis (plates and screws), removed from patients to identify the causes and failures, and possibly to use these results in the prevention of future occurrences of errors. Following the criteria specified in ISO 5832-1 and ASTM F138 that use a methodology, which consists of techniques for visual inspection, chemical analysis, macro and micro-structural characterization and examination fractographic.