Shear Bond Strength of an Endodontic Tricalcium Silicate-Based Putty to Different Adhesive Systems at Different Time Intervals
Author(s): Majedah Al-Homaidhi*
Introduction: New bioceramic products continue to be released into the market, with slight differences in formulation, manipulation, and manufacturer’s instructions. NeoPUTTY is a new fast setting bioceramic putty that is easy to manipulate, and final restoration can be placed immediately. Aim: This study aimed to evaluate the shear bond strength of resin-modified glass ionomer cement (RMGIC) and self-adhering flowable composite (SAFC) to the NeoPUTTY placed immediately or after 24 h. Materials and Methods: A total of 80 Teflon blocks with a central hole (4 mm in diameter and 2 mm in depth) were prepared and filled with NeoPUTTY. The blocks were then assigned to two groups (n=40) based on the restorative materials used (SAFC or RMGIC). Each group was subdivided into two subgroups (n=20) based on the evaluation intervals (immediately and 24 h after placing the NeoPUTTY. After the bonding procedures, the shear bond strengths of the samples were measured in MPa at a strain rate of 0.5 mm/min. Data were analysed using one-way ANOVA, post hoc test, and t-test (P<0.05). Results: A significant difference was found between all the groups, with the highest value obtained with SAFC placed after 24 h, whereas the lowest values were obtained with RMGIC when placed immediately. Conclusion: The bond strengths of SAFC immediately or 24 h after placing NeoPUTTY were significantly higher than those of RMGIC. Thus, SAFC is recommended for use with NeoPUTTY instead of RMGIC.