2024 Volume 24 Issue 2 Pages 13-17
Purpose: The purpose was to investigate the effect of simulated intra-oral temperature and humidity variations on dentin bonding performance of resin luting agents.
Methods: A self-cure resin luting agent (Super-Bond C&B, SB) and dual cure type resin luting agents (Panavia V5, PV; RelyX Ultimate, RU; Estecem II, E2) were used. The PV, RU, and E2 groups were divided into two sub-groups; light cured (LC) and self-cured (CC). Specimen preparation was performed at room temperature (LAB), supragingival finish line (SUP), and subgingival finish line (SUB) simulation occurred in a thermostatic device (31 ± 2℃/93 ± 3%). The SUB specimens were stored in water 10 s after bonding. Shear bond strength (SBS) values were measured and analyzed using Dunn's test with Bonferroni correction (P = 0.05).
Results: The bonding performance of SB was stable under all the environmental conditions. In contrast, the SBSs of PV, RU, and E2 significantly decreased in SUP and SUB (P < 0.05). The SBSs of PV, RU, and E2 were reduced in CC (except for PV/LAB).
Conclusion: The bonding performance under the three environmental conditions were resin luting agent dependent. SB provided the highest SBS regardless of the bonding environments. Light irradiation strongly influenced the bonding performance of the dual cure resin luting agents.
