Department of Endodontics, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, Texas, USA.
Department of Endodontics, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, Texas, USA.
J Endod. 2022 Jun;48(6):781-786. doi: 10.1016/j.joen.2022.02.009. Epub 2022 Feb 25.
The retrievability of calcium silicate-based sealers (CSSs) during nonsurgical retreatment has been equivocal. This study compared the retrievability of 3 different CSSs using 1 of 3 different solutions or no solution.
A total of 130 extracted teeth with a straight canal were decoronated to a standardized root length. The canals were instrumented to 35/.04 and divided into 3 groups (BC: EndoSequence BC sealer; EBC: EdgeBioceramic; NEO: NeoSEALERFlo), and each group was further divided into 4 subgroups (6% sodium hypochlorite; 5% acetic acid; carbonated water; no solution). After sealer placement, each master gutta-percha cone was placed intentionally 2 mm short of the working length (WL) to ensure the apical 2 mm was filled only with sealer. After storage for 21 days at 37°C and 100% humidity, retreatment was performed until apical patency was obtained. The operator was blinded to the CSS and solution used. Data were analyzed using analysis of variance to compare apical patency rates and the mock chair-times.
Overall success rates for apical patency in BC, EBC, and NEO were 63.64%, 69.77%, and 100%, respectively. There was significantly higher apical patency rate in NEO than BC and EBC. The chair-time for NEO was significantly shorter than BC (P < .05) and EBC sealer (P < .001). There was no significant difference in the chair-time between BC and EBC sealer groups.
BC, EBC, and NEO sealers in a straight canal were consistently retrievable when no solution was used. Compared with no solution, the retrievability of BC, EBC, and NEO decreased when solutions were used.
硅酸钙基封闭剂（CSS）在非手术再治疗中的可回收性尚无定论。本研究使用 3 种不同溶液中的 1 种或不使用溶液比较了 3 种不同 CSS 的可回收性。
共 130 颗具有直根管的离体牙被截冠至标准根长。根管采用 35/.04 器械扩大，分为 3 组（BC：EndoSequence BC 封闭剂；EBC：EdgeBioceramic；NEO：NeoSEALERFlo），每组进一步分为 4 个亚组（6%次氯酸钠；5%乙酸；碳酸水；无溶液）。放置封闭剂后，每个主牙胶尖故意放置在工作长度（WL）短 2mm 处，以确保根尖 2mm 仅填充封闭剂。在 37°C 和 100%湿度下储存 21 天后，进行再治疗，直到获得根尖通畅。操作人员对使用的 CSS 和溶液均不知情。使用方差分析比较根尖通畅率和模拟椅位时间来分析数据。
BC、EBC 和 NEO 的根尖通畅总成功率分别为 63.64%、69.77%和 100%。NEO 的根尖通畅率明显高于 BC 和 EBC。NEO 的椅位时间明显短于 BC（P<.05）和 EBC 封闭剂（P<.001）。BC 和 EBC 封闭剂组的椅位时间无显著差异。
在不使用溶液的情况下，直根管中的 BC、EBC 和 NEO 封闭剂均可回收。与不使用溶液相比，使用溶液时 BC、EBC 和 NEO 的可回收性降低。
