Effect of semipermanent cement on the tensile bond strength of implant-supported monolithic zirconia crowns
Merve Sena Ekinci, Prof. Asli Secilmis
Objectives
The purpose of this study was to evaluate the effect of semi-permanent cement on the tensile bond strength of implant-supported monolithic zirconia crowns.
Materials and Methods
Forty-eight implant analogs and abutments were placed in autopolymerizing acrylic resin material. Digital impressions were taken of each abutment. The crown for each abutment was designed in the shape of the maxillary 1st premolar. Monolithic zirconia crowns were prepared to fit the abutments. The crowns were divided into 4 groups (n=12) and cemented with different semi-permanent cements. After thermal cycling, tensile testing was performed using a universal testing device (5 mm/min) and the value at which decementation occurred was recorded (N). The type of fracture was assessed after decementation. The results were statistically analysed using one-way analysis of variance and Tamhane's multiple comparison test (α=0.05).
Results
There was a statistically significant difference between the bond strengths of the cements used (P<.05). The highest bond strength value was found for EsTemp Implant. This was followed by Dentotemp, GC Fuji Temp LT and Temp-Bond Clear, in order from highest to lowest. Residues were found on the abutment surface in 8 specimens in the EsTemp group and in 11 specimens in the Temp-Bond group. In the Dentotemp group, it remained on the crown in half of the specimens and on the abutment surface in only 3 specimens.
Conclusions
Urethane dimethacrylate and methacrylate based cements have higher bond strength than other cements.