Comparison of Marginal Fit of Zirconia Copings Produced by Different Systems and Materials

Purpose: The aim of this study was to compare marginal fit of zirconia copings produced by different systems and materials. Material and Methods: Tooth preparation with circumferential shoulder was performed on maxillary premolar acrylic tooth model. Copings (n=10) were produced with 5 different system-zirconia blocks (Cerec-InCoris ZI, Everest-BioZH, Celay-In-Ceram Zirconia, Zirkonzahn-IceZirkon ve Lava-Frame Zirconia) on prepared tooth model. Metal copings (Ni-Cr) were used as a control group. Marginal discrepancy of copings were measued with a stereomicroscope. Statistical analysis was performed with One-way ANOVA and Bonferonni test (p 0.05). Results: Marginal discrepancy mean values of goups were listed from lowest to highest as: Lava Cerec Everest Zirkonzahn Celay Metal casting. Ni-Cr group showed higher marginal discrepancy values compared with other systems and this difference was statistically significant (p 0.01). Mean values of Celay and Zirkonzahn groups were found to be statistically significantly higher than Cerec and Lava groups (p 0.05). Conclusion: Manufacturing technique and material were both found to be effective on marginal fit of zirconia copings.