Comparison of the Internal Adaptation of Restorations Manufactured with Different Materi-als and Techniques

Abstract

Purpose: This study aimed to evaluate and compare the internal adaptation of restorations produced with different materials and techniques.

Material and Method: In the study, tooth 36 was prepared on a dental training model (Kavo Basic study model, KavoGMBH, Germany) by an experienced prosthodontist. Using computer-aided manufacturing methods, 10 feldspathic ceramic crowns (Cerec Blocs, Sirona, Bensheim, Germany), monolithic zirconia crowns (Ceramill ZI CAM, Amann Girrbach, Germany), zirconia frameworks (Aidite, Superfect Zir, USA), metal frameworks (Bego, Germany) by laser sintering, and metal frameworks (using conventional methods) were fabricated. The metal and zirconia frameworks were completed with superstructure ceramics (VITA, Germany) by an experienced technician. The restorations were placed on the prepared teeth, and a silicone replica of the cement gap was obtained using the replica technique with additive-type silicone impression material (Heraeus Kulzer, Germany). Sections obtained from replicas were measured at 10 points using a light microscope. Statistical analysis of the data was performed using SPSS (ver. 21.0; SPSS, Inc., Chicago, IL, USA). ANOVA and post hoc Tukey HSD tests were applied to the obtained data.

Results: A statistically significant difference was observed only between axio-occlusal measurement points (p<0.05).

Conclusion: The internal range values were measured at a clinically acceptable range value of less than 200 micrometers. The highest internal range values were observed in the occlusal region and the lowest values in the axio-gingival region. The mean value of the highest internal range was measured at the occlusal measurement point in the monolithic zirconium group. The lowest mean value of internal range was measured at the axio-gingival measurement point in the zirconia-supported ceramic group.