Final Retention of Recemented Dental Casting Luted with Different Resin Cements

Background and Aim: Dislodgment of prosthetic crowns is a common occurrence. In such cases, recementation is a suitable treatment option. The aim of this study was to compare the retention in cementation and recementation using different resin ce-ments. Materials and Methods: In this in vitro, experimental study, 40 premolars were se-lected (n=10). They were standardized relative to some properties and then the wax patterns were prepared and cast. After 24 h, all specimens were decemented using In-stron universal testing machine. The castings were then re-cemented and stored under the same conditions. After 24 h, the cemented copings were dislodged, and the separa-tion load was recorded. Results: The highest and the lowest mean retention values belonged to Panavia F2 and Maxcem cements in both initial cementation and recementation groups, respectively. Paired sample t-test showed a significant difference in the retention of G-CEM group between initial cementation and recementation (P=0.009). The two-factorial repeated measures ANOVA showed the significant effect of cement type on retention (P=0.009), and there was a significant difference in retention between initial cementation and recementation (P=0.006). The Tukey’s HSD test re-vealed a significant difference in retentive strength between the Maxcem and Panavia F2 (P=0.011). The lowest mean difference was observed between Bifix SE and Maxcem groups (-16.75 kgf, P=0.89). Conclusion: The maximum and minimum mean retention values belonged to Panavia F2 cement and Maxcem in both initial cementation and recementation groups, respectively. There was a significant difference between the initial cementation and recementation in G-CEM group.