Lopes Fabiane Carneiro, Zangirolami Caio, Mazzi-Chaves Jardel Francisco, Silva-Sousa Alice Corrêa, Crozeta Bruno Monguilhott, Silva-Sousa Yara Teresinha Corrêa, Sousa-Neto Manoel Damião
Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Departamento de Odontologia Restauradora, Ribeirão Preto, São Paulo, Brasil.
Universidade de Ribeirão Preto, Faculdade de Odontologia, Ribeirão Preto, São Paulo, Brasil.
J Appl Oral Sci. 2019 Sep 9;27:e20180556. doi: 10.1590/1678-7757-2018-0556.
To evaluate the effect of ultrasonic and sonic activation on physicochemical properties of AH Plus, MTA Fillapex, ADSeal, GuttaFlow Bioseal, and GuttaFlow 2 sealers.
Three experimental groups were formed: no activation (NA), ultrasonic activation (UA), and sonic activation (SA). The sealers were manipulated according to the manufacturers' instructions. A 3-mL syringe was adapted to receive 1 mL of sealer. Activation was performed with a 20/.01 ultrasonic insert (20 s/1W) in the UA group. A size 35.04 sonic tip was used (20 s/10,000 cycles/min-1) in the SA group. The molds for physicochemical analysis were filled and evaluated according to ANSI/ADA specification no. 57: setting time (ST), flow (FL), dimensional change (DC), solubility (SB), and radiopacity (RD). Statistical analysis was performed by Kruskal-Wallis, one-way ANOVA, and Tukey's tests (P<0.05).
Regarding ST, only AH Plus and GuttaFlow 2 in the NA group met the ANSI/ADA standards. All FL values were greater than 20 mm in diameter, as determined by ANSI/ADA. The tested sealers and protocols did not comply with the ANSI/ADA standards for DC. As for SB, only MTA Fillapex, regardless of the activation protocol, did not follow the ANSI/ADA standards. All of the investigated sealers, regardless of the activation protocol, presented radiographic density higher than 3 mm Al, as proposed by ANSI/ADA.
UA and SA promoted changes in the physicochemical properties of the evaluated root canal sealers, mainly in ST and F. Thus, it is important to evaluate the physicochemical properties of endodontic sealers associated with activation techniques prior to clinical application in order to determine whether the properties follow the parameters set by ANSI/ADA, ensuring safety and quality of root canal filling.
评估超声激活和声波激活对AH Plus、MTA Fillapex、ADSeal、GuttaFlow Bioseal和GuttaFlow 2根管封闭剂物理化学性能的影响。
组建三个实验组：未激活组（NA）、超声激活组（UA）和声波激活组（SA）。根据制造商的说明操作封闭剂。将一个3 mL注射器改装后装入1 mL封闭剂。UA组使用20/.01超声插入头（20秒/1瓦）进行激活。SA组使用35.04号声波尖端（20秒/10000次循环/分钟）。根据ANSI/ADA规范第57号，填充并评估用于物理化学分析的模具：凝固时间（ST）、流动性（FL）、尺寸变化（DC）、溶解度（SB）和射线不透性（RD）。采用Kruskal-Wallis检验、单因素方差分析和Tukey检验进行统计分析（P<0.05）。
关于凝固时间，仅NA组中的AH Plus和GuttaFlow 2符合ANSI/ADA标准。根据ANSI/ADA测定，所有流动性值的直径均大于20 mm。测试的封闭剂和方案不符合ANSI/ADA关于尺寸变化的标准。至于溶解度，无论激活方案如何，只有MTA Fillapex不符合ANSI/ADA标准。所有研究的封闭剂，无论激活方案如何，其射线密度均高于ANSI/ADA建议的3 mm铝。
超声激活和声波激活促进了所评估的根管封闭剂物理化学性能的变化，主要是在凝固时间和流动性方面。因此，在临床应用前评估与激活技术相关的牙髓封闭剂的物理化学性能非常重要，以便确定这些性能是否符合ANSI/ADA设定的参数，确保根管充填的安全性和质量。
