Garcia Paula-Pontes, da Costa Rogério-Goulart, Garcia André-Vivan, Gonzaga Carla-Castiglia, da Cunha Leonardo-Fernandes, Rezende Carlos-Eduardo-Edwards, Correr Gisele-Maria
Graduate Student, Graduate Program in Dentistry, Universidade Positivo, Rua Pedro Viriato Parigot de Souza, 5300, Curitiba, PR, Brazil.
Professor, Dental Prosthesis, Federal Institute for Science and Technology of Paraná, Rua João Negrão 1258, Curitiba, PR, Brazil.
J Clin Exp Dent. 2018 Jun 1;10(6):e591-e597. doi: 10.4317/jced.54904. eCollection 2018 Jun.
There is no ideal protocol for the surface treatment of fiber posts, especially when using a computer-aided design/computer-aided manufacturing (CAD/CAM) experimental fiberglass block. The purpose of this study was to evaluate the bond strength of a CAD/CAM customized glass fiber post and core after applying different surface treatment techniques.
Forty premolars were prepared to receive a customized CAD/CAM glass-fiber post and core obtained from an experimental block of glass fiber and epoxy resin. The specimens were randomly distributed in 4 groups (n=10) according to the post and core surface treatment: ETH - 70% ethanol; HP - 24% hydrogen peroxide for 1 minute; ETH/S - 70% ethanol + silane; HP/S - 24% hydrogen peroxide + silane. The universal adhesive containing silane was applied on the posts and prepared post spaces in all groups. The posts were cemented using dual cure resin cement. The specimens were stored in distilled water at 37°C for 24 h, cut (two slices of 1 mm for each root third - coronal, middle, and apical) and subjected to push-out test (0.5 mm/min). Data was subjected to two-way ANOVA (surface treatment and root third) and Tukey's test (α=0,05).
There was no significant difference of bond strength values among groups, regardless the surface treatment ( >0.05). There was significant difference on bond strength values for the different root thirds (<0.05) (coronal>middle=apical).
The different surface treatment and application of additional silane in the CAD/CAM customized glass-fiber post and core does not interfere on bond strength values. The root dentin third interfered on the bond strength, with higher values for the coronal third. Post and core technique, cad/cam, shear strength, hydrogen peroxide.
对于纤维桩的表面处理，尚无理想的方案，尤其是在使用计算机辅助设计/计算机辅助制造（CAD/CAM）实验性玻璃纤维块时。本研究的目的是评估应用不同表面处理技术后CAD/CAM定制玻璃纤维桩核的粘结强度。
准备40颗前磨牙，以容纳从玻璃纤维和环氧树脂实验块获得的定制CAD/CAM玻璃纤维桩核。根据桩核表面处理将标本随机分为4组（n = 10）：ETH - 70%乙醇；HP - 24%过氧化氢处理1分钟；ETH/S - 70%乙醇+硅烷；HP/S - 24%过氧化氢+硅烷。所有组均在桩上和预备的桩道中应用含硅烷的通用粘结剂。使用双固化树脂粘结剂粘结桩。将标本在37°C蒸馏水中储存24小时，切割（每个牙根三分之一 - 冠部、中部和根尖各切两片1mm厚的切片）并进行推出试验（0.5mm/分钟）。数据进行双向方差分析（表面处理和牙根三分之一）和Tukey检验（α = 0.05）。
无论表面处理如何，各组间粘结强度值均无显著差异（>0.05）。不同牙根三分之一的粘结强度值存在显著差异（<0.05）（冠部>中部 = 根尖部）。
CAD/CAM定制玻璃纤维桩核中不同的表面处理和额外硅烷的应用不会影响粘结强度值。牙根牙本质三分之一对粘结强度有影响，冠部三分之一的粘结强度值更高。桩核技术、CAD/CAM、剪切强度、过氧化氢。
