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The International Journal of Prosthodontics
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Int J Prosthodont 31 (2018), Nr. 5     8. Okt. 2018
Int J Prosthodont 31 (2018), Nr. 5  (08.10.2018)

Seite 475-477, doi:10.11607/ijp.5800, PubMed:30180234, Sprache: Englisch


Comparing Retention and Internal Adaptation of Different Implant-Supported, Metal-Free Frameworks
Ghodsi, Safoura / Zeighami, Somayeh / Azad, Mojdeh Meisami
Purpose: This study was conducted to compare the fit and retention of implant-supported, metal-free copings fabricated from zirconia, polyetheretherketone (PEEK), or composite, as well as to evaluate the possible correlation between internal adaptation and retention.
Materials and Methods: A total of 36 copings were milled from zirconia, PEEK, or composite blanks (n = 12 in each group). Marginal and internal gap were evaluated by replica technique, and the pull-out test was used to evaluate retention. One-way analysis of variance, post hoc Tukey tests, and Pearson correlation coefficient test were used to analyze the data.
Results: Zirconia had significantly better marginal/internal adaptation (P < .05) than the other materials. There was no statistically significant difference in mean retention force between the different groups (P > .05). No correlation was found between internal adaptation and retention.
Conclusion: In the metal-free copings tested, zirconia showed the best adaptation. The retention of copings was not influenced by internal fit or material type.
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