Analysis of the Marginal Fit and Dimensional Stability of Cast-to Cobalt-Chromium Implant Cylinders Cast from Different Alloys

作者:Fulginiti Roberta Limeira*; Grossi Marcio Lima; Ozkomur Ahmet; Rodrigues Neto Dimas Joao; Arai Shinkai Rosemary Sadami; Teixeira Eduardo Rolim
来源:International Journal of Prosthodontics, 2018, 31(4): 367-369.
DOI:10.11607/ijp.5720

摘要

Purpose: To evaluate the influence of cobalt-chromium (Co-Cr) casting alloys' melting temperatures on the cast-to Co-Cr implant cylinders' marginal fit. Materials and Methods: Co-Cr alloys with different melting ranges were cast into 20 Co-Cr cylinders: 10 in a high-melting temperature (HMT) group and 10 in a low-melting temperature (LMT) group. Ten cylinders were used as received as a control group. Cylinders' marginal misfit and dimensional stability were evaluated using scanning electron microscopy (x500). Results and Conclusion: HMT cylinders showed significant differences in marginal misfit (2.48 +/- 1.07 mu m(2)) compared to LMT (1.53 +/- 0.37 mu m(2)) and control (1.27 +/- 0.57 mu m(2)) cylinders, but there were no differences in dimensional stability. HMT Co-Cr alloys produce implant-supported prostheses with poor marginal fit.

  • 出版日期2018-8