Suzuki Thaís Yumi Umeda, Pereira Mariana Almeida, Gomes-Filho João Eduardo, Wang Linda, Assunção Wirley Gonçalves, Santos Paulo Henrique Dos
Department of Dental Materials and Prosthodontics, School of Dentistry, UNESP -Universidade Estadual Paulista, Araçatuba, SP, Brazil.
Department of Restorative Dentistry, Faculty of Dentistry, UFMG - Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Braz Dent J. 2019 Mar-Apr;30(2):106-116. doi: 10.1590/0103-6440201901963. Epub 2019 Apr 4.
The aim of this study was to evaluate the push-out bond strength and interface permeability of glass-fiber posts in different regions of post space (cervical, middle, and apical) submitted to different irrigation solutions. Ninety single-rooted human teeth were submitted to endodontic treatment and divided into five groups, according to irrigation solutions: distilled water, 5.25% NaOCl, 25% polyacrylic acid, 2% chlorhexidine, and 23 ppm Ag NP dispersion. Each group was divided in 3 subgroups (n=6) according to cementation: SBU: Adper Scotchbond Universal + RelyX ARC; U200: RelyX U200; MCE: MaxCem Elite. Bond strength and sealing ability were measured in different areas of post space. The data was subjected to ANOVA and Fisher's test (a=0,05). The silver nanoparticle solution showed highest bond strength values and lowest interface permeability in all thirds analyzed for SBU group. In the U200 group, the highest bond strength values were found for sodium hypochlorite solution, with significant difference between this solution and polyacrylic acid. A decrease in bond strength values in cervical to apical direction was found for MCE group and the same behavior were found for others groups. Regarding interface permeability, use of silver nanoparticle solution resulted in lower values in cervical and apical thirds. There was a decrease in bond strength in cervical to apical direction. Different irrigation solutions and intraradicular depth influenced the bond strength and interface permeability of adhesive material to dentin substrate. Silver nanoparticle solution can effectively be used as an irrigation agent in post space prior to fiber post cementation process.
本研究的目的是评估玻璃纤维桩在桩道不同区域（颈部、中部和根尖部），使用不同冲洗液后的推出粘结强度和界面渗透性。90颗单根人牙接受根管治疗，并根据冲洗液分为五组：蒸馏水、5.25%次氯酸钠、25%聚丙烯酸、2%氯己定和23 ppm银纳米颗粒分散液。根据粘结剂，每组再分为3个亚组（n = 6）：SBU组：Adper Scotchbond Universal + RelyX ARC；U200组：RelyX U200；MCE组：MaxCem Elite。测量桩道不同区域的粘结强度和封闭能力。数据采用方差分析和Fisher检验（α = 0.05）。对于SBU组，在所有分析的三段中，银纳米颗粒溶液显示出最高的粘结强度值和最低的界面渗透性。在U200组中，次氯酸钠溶液的粘结强度值最高，该溶液与聚丙烯酸之间存在显著差异。MCE组在颈部到根尖方向的粘结强度值降低，其他组也有相同表现。关于界面渗透性，银纳米颗粒溶液在颈部和根尖三分之一处的值较低。在颈部到根尖方向粘结强度降低。不同的冲洗液和根管内深度影响了粘结材料与牙本质基质的粘结强度和界面渗透性。在纤维桩粘结过程之前，银纳米颗粒溶液可有效地用作桩道冲洗剂。
