Kinetics of pulpal temperature rise during light curing of 6 bonding agents from different generations, using light emitting diode and quartz-tungsten-halogen units: An in-vitro simulation

摘要: Background: Application of bonding agents (BA) into deep cavities and light curing them might increase pulpal temperature threaten its health. The purpose this study was to evaluate rise pulp by six BA using two different units (LCU), through a dent in wall 0.5 mm. Materials Methods: This vitro experiment carried out on 96 slices the same number human third molars (6 BAs × 2 LCUs 8 specimens each group). There were 6 groups BAs: N Bond, G-Bond, OptiBond XTR, Clearfi l SE, Adper Single Bond V Bond. Each group ( n = 16) had subgroups emitting diode (LED) quartz-tungstenhalogen cure 8). these 16 subjected for 20 s, once without any (control) later when applied surface disk. Temperature rises 140 s evaluated. Their mean change fi rst calculated analyzed two-way repeated-measures one-way analysis variance (ANOVA) Tukey (α 0.05). Furthermore rate material LCU. Results: Minimum maximum all 1.7 2.8°C, respectively. Repeated measures ANOVA showed that both adhesive LCU types signifi cant effect after application adhesives. post-hoc SE cantly higher comparison with bond P 0.047) 0.038). rose linear fashion during 30-40 it non-linear. Conclusion: seems safe health (with critical threshold 5.5°C). However, longer durations especially LED units, process should be broken sessions. Key Words: Composite resins, dental materials, differential thermal analysis, polymerization