Marginal fit of implant-supported fixed prosthesis frameworks with prefabricated and calcinable cylinders

Authors

  • Fernando Rizzo Alonso PUC-RS
  • Diego Fernandes Triches PUC-RS
  • Eduardo Rolim Teixeira PUC-RS
  • Luciana Mayumi Hirakata PUC-RS

Keywords:

Dental implants, passive fit, manual rectification

Abstract

Purpose: The aim of this study was to evaluate the vertical marginal misfit of the metal framework of an implant-supported prosthesis. Methods: Ten frameworks were made of cobalt-chromium alloy (Co-Cr), simulating a three-element fixed prosthesis on two implants. Five frameworks were constructed using prefabricated cylinders, and the other five were constructed using calcinable cylinders. All frameworks were cast by the induction technique and laser-welded. Marginal misfit was measured by means of scanning electron microscopy with the frameworks subjected to the single-screw test. Twenty-five measurements of marginal fit were recorded per abutment and averaged for statistical analysis (ANOVA, α=0.05). Results: There was no statistically significant difference in marginal fit between the groups tested. The only difference found was when comparing the abutments with and without screw. Conclusion: It was concluded that there is no difference in marginal fit between frameworks cast in Co-Cr with calcinable and prefabricated cylinders using induction casting, laser-welding, and single-screw test. Key words: Dental implants; passive fit; manual rectification

Author Biographies

Fernando Rizzo Alonso, PUC-RS

Especialista em Implantodontia pelo Hospital de Reabilitação de Anomalias Craniofaciais – USP/Bauru, Mestrando em Prótese Dentária pela PUC/RS.

Diego Fernandes Triches, PUC-RS

Especialista em Prótese Dentária pela FOB/USP, Mestrando em Prótese Dentária pela PUC/RS.

Eduardo Rolim Teixeira, PUC-RS

Doutor em Implantodontia pela Universidade de Hiroshima – Japão. Cordenador do curso de Mestrado e Doutorado em Odontologia – Área de concentração Prótese Dentária – PUC/RS.

Luciana Mayumi Hirakata, PUC-RS

Doutora em Materiais Dentários pela Universidade de Tokushima – Japão. Professor Adjunto da Disciplina de Materiais Dentários da FO – PUC/RS

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Published

2008-07-14

Issue

Vol. 23 No. 4 (2008)

Section

Original Article

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