Facultad de Ciencias de la Salud, Universidad Católica de Córdoba, Argentina; Círculo Odontológico de Rosario, Rosario, Argentina.
Facultad de Ciencias de la Salud, Universidad Católica de Córdoba, Argentina; Facultad de Odontología, Universidad Nacional de Córdoba, Argentina.
J Endod. 2023 Nov;49(11):1565-1569. doi: 10.1016/j.joen.2023.08.021. Epub 2023 Sep 5.
Gutta-percha combined with an endodontic sealer remains the most widely used obturation technique. Bioceramic sealers (BS) were developed for root canal obturation in combination with gutta-percha cones using the cold single-cone technique. Few studies have assessed the effect of thermal treatment on the performance of BS. The present study evaluated the effect of heat on BS adhesion to root dentine in the apical third of the root canal of extracted human lower premolars.
Three BS combined with a hydraulic condensation technique, a warm vertical compaction technique, and a carrier-based technique were evaluated. Sixty three lower premolars were prepared following the same surgical protocol to standardize root canal shape at the level of the apex, randomly assigned to one of nine groups, and obturated accordingly. One millimeter-thick sections were subjected to a push-out test using a universal testing machine and classified according to mode of failure. Two-way ANOVA was applied using SPSS software (IBM Corp).
No significant differences in maximum load or failure mode were observed among BS, techniques, or when considering the interaction between sealers and techniques.
The heat generated by the obturation techniques used here did not affect BS adhesion to the dentinal wall.
牙胶联合根管封闭剂仍然是最广泛使用的根管封闭技术。生物陶瓷封闭剂（BS）是为与牙胶尖联合使用冷单尖技术进行根管封闭而开发的。很少有研究评估热疗对 BS 性能的影响。本研究评估了热对 BS 与根管牙本质根尖三分之一处黏附性能的影响，使用的样本为离体人下颌前磨牙。
本研究评估了 3 种 BS，它们分别与液压冷凝技术、热垂直压实技术和载体基技术联合使用。63 颗下颌前磨牙按照相同的手术方案进行预备，以标准化根尖水平的根管形状，随机分为 9 组中的一组，并相应地进行根管封闭。使用万能试验机对 1 毫米厚的牙本质片进行推出试验，并根据失效模式进行分类。使用 IBM SPSS Statistics 软件进行双向方差分析。
BS、技术或考虑封闭剂和技术之间的相互作用时，最大负荷或失效模式没有显著差异。
本文所用根管封闭技术产生的热量不会影响 BS 与牙本质壁的黏附。
