Department of Restorative Dentistry, School of Dentistry of Araraquara, São Paulo State University, Araraquara, SP, Brazil.
Researcher, School of Dentistry, Universidad Católica de Santa María-UCSM, Arequipa, Peru.
J Esthet Restor Dent. 2022 Oct;34(7):1077-1084. doi: 10.1111/jerd.12924. Epub 2022 May 14.
The aim of this study was to evaluate the effectiveness of cleansing protocols to remove sealer residues using different cleaning strategies and the effect of bond strength of two universal adhesives to dentin impregnated with epoxy resin-based sealer.
Fifty bovine dentin specimens were impregnated with epoxy resin-based sealer containing calcium hydroxide (Sealer Plus) and submitted to cleansing protocols (n = 10): negative control (NC), positive control (PC), 95% ethanol (ET), xylol (XI), and amyl acetate (AA). Specimens were evaluated by scanning electron microscope (SEM). Other 100 specimens were submitted to the same protocols (n = 20). Each protocol was divided into subgroups (n = 10) according to the universal adhesive system used: Scotchbond Universal (SU); Ambar Universal (AU). Bond strength was evaluated by micro-shear bond test (μSBT). Persistence of residues data were assessed with Kruskal-Wallis and Dunn's tests. μSBT data were analyzed with two-way ANOVA (α = 5%).
ET presented higher persistence of residues compared to AA and XI (p < 0.05). AA and XI were similar from each other (p > 0.05). AU and SU presented similar μSBT values, regardless of the cleansing solution (p > 0.05). SU-NC presented the highest μSBT among all conditions (p < 0.05).
The bond strength of universal adhesives was not affected by different amounts of sealer residues after different cleaning protocols.
Non-polar substances such as amyl acetate and xylol are effective for removing residues from epoxy resin-based endodontic sealers.
本研究旨在评估使用不同清洁策略清除含氢氧化钙的环氧树脂基密封剂残留的效果，并评估两种通用型粘结剂与用环氧树脂基密封剂浸渍的牙本质之间的粘结强度。
将 50 个牛牙本质样本用含有氢氧化钙的环氧树脂基密封剂（Sealer Plus）浸渍，并进行清洁方案（n=10）：阴性对照（NC）、阳性对照（PC）、95%乙醇（ET）、二甲苯（XI）和乙酸戊酯（AA）。用扫描电子显微镜（SEM）评估标本。另外 100 个标本也进行了相同的方案（n=20）。每个方案根据使用的通用粘结剂系统分为亚组（n=10）：Scotchbond Universal（SU）；Ambar Universal（AU）。用微剪切粘结试验（μSBT）评估粘结强度。用 Kruskal-Wallis 和 Dunn 检验评估残留数据的持久性。用双因素方差分析（α=5%）分析 μSBT 数据。
ET 与 AA 和 XI 相比，残留持久性更高（p<0.05）。AA 和 XI 彼此相似（p>0.05）。AU 和 SU 无论使用哪种清洁剂，其 μSBT 值均相似（p>0.05）。SU-NC 在所有条件中表现出最高的 μSBT（p<0.05）。
不同清洁方案后，通用粘结剂的粘结强度不受不同量的密封剂残留的影响。
非极性物质，如乙酸戊酯和二甲苯，可有效去除环氧树脂基根管封闭剂的残留。
