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 cements. materials and methods: in this in vitro, experimental study, 40 premolars were selected (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 instron 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 separation 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 revealed 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.