The influence of different screw tightening forces on the vertical misfit of implant-supported frameworks
OBJECTIVES: The present in vitro study was designed to compare the differences in the vertical misfit of implant-supported frameworks using three different forces for tightening the bridge locking screws: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. METHODS:...
| Autores: | , , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2005 |
| País: | Brasil |
| Recursos: | Universidade de São Paulo (USP) |
| Repositório: | Journal of applied oral science (Online) |
| Idioma: | inglês |
| OAI Identifier: | oai:revistas.usp.br:article/3261 |
| Acesso em linha: | https://www.revistas.usp.br/jaos/article/view/3261 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Implantes dentários Osseointegração Prótese dentária fixada por implante Torque desadaptação Dental implants Osseointegration Implant-supported dental prosthesis misfit |
| Resumo: | OBJECTIVES: The present in vitro study was designed to compare the differences in the vertical misfit of implant-supported frameworks using three different forces for tightening the bridge locking screws: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. METHODS: The investigation was conducted based on the results given by 9 six-unit nickel-chromium (2 abutments/ 4 pontics) screw-retained implant-supported frameworks. The structures were exposed to simulated porcelain firings. The marginal misfit measurements were made using a traveling measuring microscope at selected screw tightening forces: fastening by hand until first resistance, and using torque drivers with 10 and 20Ncm. The results were submitted to one-way ANOVA with repeated measures on one factor, and post hoc pairwise comparisons using Tukey test (5%). RESULTS: The mean marginal misfit of the frameworks, fastening the screws by hand until first resistance, was 41.56µm (SD±12.45µm). The use of torque driver devices caused a significant reduction in marginal opening (p |
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