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

Fernando Rizzo Alonso, Diego Fernandes Triches, Eduardo Rolim Teixeira, Luciana Mayumi Hirakata


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


Dental implants; passive fit; manual rectification

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e-ISSN: 1980-6523

ISSN-L: 0102-9460


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