Análise fotoelástica da distribuição das tensões ocorridas no tecido ósseo, ao redor de cinco diferentes desenhos de implante, quando submetidos ao carregamento axial / Photoelastic analysis of stress distributions occurring around the bone tissue of five different designs of implants when subjected to axial loading

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/09/2011

RESUMO

The design of the implant is a highly relevant factor in the distribution of stresses generated in the peri-implant tissues. The proposition of this study was to evaluate the stress distribution of five different designs of implants, when subjected to axial loads uniformly distributed. Were prepared five photoelastic jaws, in which the implants used in this research were inserted: Tappered Effect (TE-4.1X12mm Straumann Dental Implant System), Bone Level (BL-4.1X12mm Straumann Dental Implant System), Regular Neck Standard Plus (RNSP 4.1X12mm- Straumann Dental Implant System) Ankylos (AK-4.5X11mm Dentsply Ind e Com Ltda), Branemark MKIII (3.75mmX11.5mm MKIII, Nobel Biocare AB). The mandibles were positioned on the photoelastic skull, and axial loads, uniformly distributed in 2.3 and 4 bars were applied. Among the five implants used, the BL and AK have reduced platform and cylindrical, the TE has conical shape, and MKIII RNSP cylindrical shape, and these have regular platform. The results show that both implants showed tensions in the region where we find the threads of the implants. Implants BL and AK, were free of cervical tension. The MKIII implant showed the highest stresses in the apical region and along the implant there were no tensions dissipated. The implant RNSP showed greater tension in the neck of the implant. The TE showed tensions well distributed over the implant, but there was no relief of tension in the neck. We conclude that implants that have reduced platform (AK and BL) create tension distant from the cervical region. Despite RNSP TE implants have the same dimension platforms, the RNSP showed higher stress in the region of the platform, and may conclude that implants conical distribute favorably tensions. The MKIII showed higher stress in the apical region.

ASSUNTO(S)

dental implant desenhos de implantes distribuição de tensões implant design implantes dentários load plataform switching plataforma reduzida tension distribuition

ACESSO AO ARTIGO

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