Evaluation of the shear bond strength of various adhesive systems to calcium silicate based pulp capping materials

Abstract

Aim: This study aimed to evaluate the shear bond strength (SBS) values of different adhesive systems to calcium silicate and calcium hydroxide-based pulp capping materials. Methods: Cylinder-shaped cavities (2x5 mm) were prepared in the middle of 120 acrylic blocks. Three pulp capping materials (Biodentine, TheraCal LC, Kerr Life) were placed into the cavities. Single Bond 2 (SB2), Clearfil SE Bond (CSB), Clearfil Universal Bond (CUB), Tokuyama Self-cured Universal Bond (TUB) were applied for each pulp capping material (n=10). After composite resin cylinders were prepared, SBS tests were carried out. Data and failure modes were analyzed using two-way ANOVA, Tamhane’s T2 (p?0.05), and stereomicroscope, respectively. Results: TheraCal LC showed the highest SBS values, and there was a statistically significant difference amongst pulp capping materials for all adhesives (p?0.05). The lowest results were found in the Life+TUB (0.79±0.14), and the highest was TheraCal LC+CSB (8.55±1.73). In Biodentine, all adhesive systems showed lower results than TheraCal LC groups, whereas there was a statistically significant difference between SB2 and TUB compared to the Life. Conclusion: TheraCal LC, which has the highest bond strength value in different generation adhesive systems, can be preferred as a pulp capping agent for composite restorations.