We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
The International Journal of Prosthodontics



Forgotten password?


Int J Prosthodont 31 (2018), No. 5     8. Oct. 2018
Int J Prosthodont 31 (2018), No. 5  (08.10.2018)

Page 475-477, doi:10.11607/ijp.5800, PubMed:30180234

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.