■在牙髓治疗期间密封牙髓腔的牙本质,以避免干扰随后进行的修复治疗。
■目的是评估在不同粘合策略中应用的三种粘合剂系统的效果(蚀刻和冲洗,自蚀刻,和通用粘合剂)以及在混合层形成和牙本质穿透性上的时间点应用(紧接在腔通道准备之后或在牙髓闭塞之后)。
■根据所使用的粘合系统将48颗声磨牙随机分为六组(n=10):根据所使用的粘合系统和时间点应用:AdperScotchbond多用途(AS),将48颗声磨牙随机分为六组(n=10),ClearfilSE(CF)和ScotchbondUniversal(SU)在立即牙髓密封(IES)或延迟牙髓密封(DES)策略中。在IES-AS中,IES-CF,和IES-SU小组,在进入牙腔后立即进行牙本质密封,而在DES-AS中,DES-CF,和DES-SU,根管闭塞后。标本沿长轴剖切,在颊舌方向,使用共聚焦显微镜图像评估粘合剂系统的牙本质渗透性。通过扫描电子显微镜图像分析杂化层的形成。
■牙本质渗透性数据用ANOVA测试进行分析,并对混合层数据进行Kruskal-Wallis测试(α=0.05)。
■IES-CF显示最低的牙本质渗透性(P<0.05),其他方案相似(P>0.05)。在杂化层形成方面,组间差异无统计学意义(P>0.05)。即时和DES协议不影响混合层的形成,无论使用何种债券策略。
■在牙髓治疗之前密封牙髓腔牙本质可以提高最终修复体的粘结强度,但混合层的形成不受粘结策略的影响。
UNASSIGNED: Seal the dentin of the pulp chamber during endodontic treatment to avoid interfering with the restorative treatment performed afterward.
UNASSIGNED: The aim was to evaluate the effect of three adhesive systems applied in different bonding strategies (etch-and-rinse, self-etch, and universal adhesive) and time-point application (immediately after the cavity access preparation or after endodontic obturation) on the hybrid layer formation and dentinal penetrability.
UNASSIGNED: Forty-eight sound molars were randomly distributed into six groups (n = 10) according to the adhesive system used: Forty-eight sound molars were randomly distributed into six groups (n = 10) according to the adhesive system used and the time-point application: Adper Scotchbond Multi-purpose (AS), Clearfil SE (CF) and Scotchbond Universal (SU) in strategy of immediate endodontic sealing (IES) or delayed endodontic sealing (DES). In IES-AS, IES-CF, and IES-SU groups, dentin sealing was performed immediately after the cavity access, while in DES-AS, DES-CF, and DES-SU, after root canal obturation. The specimens were sectioned in the long axis, in a buccal-lingual direction, and the dentinal penetrability of the adhesive systems was evaluated using confocal microscopy images. Hybrid layer formation was analyzed by scanning electron microscopy images.
UNASSIGNED: Dentinal penetrability data were analyzed with the ANOVA test and the Kruskal-Wallis test was performed for hybrid layer data (α = 0.05).
UNASSIGNED: IES-CF showed the lowest dentinal penetrability (P < 0.05), while the other protocols were similar to each other (P > 0.05). No significant differences were found between groups regarding the hybrid layer formation (P > 0.05). Immediate and DES protocols do not influence the hybrid layer formation, regardless of the bond strategy used.
UNASSIGNED: Sealing the pulp chamber dentin before endodontic treatment can improve the bond strength of the final restoration but the formation of the hybrid layer was not influenced by the bond strategy.