Reabilitações bucais com implantes curtos e coroas longas em mandíbula: análise pelo método de elementos finitos

• Ano de defesa: 2011
• Autor(a) principal: Medeiros, Antonio Carlos Quintão
• Orientador(a): Francischone, Leda Aparecida
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: IASCJ - Universidade Sagrado Coração
• Programa de Pós-Graduação: Implantologia
• Departamento: Ciências da Saúde e Biológicas
• País: BR
• Palavras-chave em Português: IMPLANTE CURTO; ELEMENTO FINITO; REABILITAÇÃO BUCAL E BIOMECÂNICA
• Palavras-chave em Inglês: SHORT IMPLANT; FINITE ELEMENT; ORAL REHABILITATION AND BIOMECHANICS
• Área do conhecimento CNPq: CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: http://localhost:8080/tede/handle/tede/63

The use of short implants has become increasingly common due to early tooth loss and subsequent bone resorption of alveolar processes of jaws. Thus, rehabilitation is usually obtained in these regions reached with the preparation of long prosthetic crowns, resulting in an unfavorable ratio of crown size relative to the implant size, making it a potential biomechanical risk. In partial rehabilitation is uncertainty the join of the prosthetic crowns or concoct them separately. The finite element analysis was used to measure the dissipation of forces in bone-implant interface of short implants prototypes in mandibular rehabilitations with unfavorable crown / implant ratio. Compared to virtually prototype implant systems Ankylos ® and Straumann ®, with a length of 6 and 8 mm, in single and partial, two elements, rehabilitations with 20 mm length dental crowns. Were applied an axial force in the occlusal center of the crowns of 382 N and a perpendicular force in the lingual surfaces of 8 N. Maximum stress values were measured in the dissipation of forces from each group. The results showed that the maximum dissipation of tension in the prototyped models Ankylos ® were lower than in the Straumann ®, the values in the model were smaller than 8 mm in 6 mm and similar values were observed in both rehabilitations, single and partial. Comparing the results obtained by this method, the prototypes of type Ankylos ® had better performance, considering the pattern of force dissipation, then Straumann ®prototypes, the largest implant length favors the biomechanical behavior of prosthetic crowns and the union does not represent adjacent improvement in terms of dissipation of masticatory forces.