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Influence of technique and manipulation on self-adhesive resin cements used to cement intraradicular posts
Fábio Kenji Shiratori1, Accácio Lins do Valle, Thiago Amadei Pegoraro
1Department of Prosthodontics, Bauru Dental School, University of Sao Paulo, Brazil.
Statement Of Problem:
Resin cements are widely used to cement intraradicular posts, but bond strength is significantly influenced by the technique and material used for cementation.
Purpose:
The purpose of this study was to evaluate the bond strength of 3 self-adhesive cements used to cement intraradicular glass fiber posts. The cements all required different application and handling techniques.
Material And Methods:
Forty-five human maxillary canines were selected and randomly divided into 3 groups n= 15 by drawing lots: Group BIS - Biscem, Group BRE - Breeze, and Group MAX - Maxcem. Each group was divided into 3 subgroups according to application and handling techniques: Sub-group A - Automix/Point tip applicator, Sub-group L - Handmix/Lentulo, and Sub-group C - Handmix/Centrix. Cementation of the posts was performed according to the manufacturers' instructions. The push-out test was performed with a crosshead speed of 0.5 mm/min, and bond strength was expressed in megapascals. The results were evaluated by 2-way ANOVA and the all pairwise multiple comparison procedures (Tukey test) (α=.05).
Results:
Breeze cement showed the highest average for the subgroups A, L, and C when compared to the Biscem cement and Maxcem Elite (P<.05). Statistically significant differences among the subgroups were only observed for Biscem.
Conclusions:
This study shows that application and handling techniques may influence the bond strength of different self-adhesive cements when used for intraradicular post cementation.
