Vechiato-Filho Aljomar José, Matos Adaias Oliveira, Landers Richard, Goiato Marcelo Coelho, Rangel Elidiane Cipriano, De Souza Grace Mendonça, Barão Valentim Adelino Ricardo, Dos Santos Daniela Micheline
Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Univ. Estadual Paulista - UNESP, Aracatuba, Sao Paulo, Brazil.
Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo, Brazil.
Mater Sci Eng C Mater Biol Appl. 2017 Mar 1;72:284-292. doi: 10.1016/j.msec.2016.11.033. Epub 2016 Nov 24.
There is no established protocol for bonding zirconia (Y-TZP) with resin cements. Non-thermal plasma (NTP) may be an alternative for the clinical problems related to adhesion. The purpose of the present study was to characterize the surface of Y-TZP exposed to methane (CH) NTP or coated with a layer of primer for metal alloys and the association between the two methods and to evaluate the effect of NTP treatment on bond strength between Y-TZP and two resin cements. A total of 235 Y-TZP discs (8×2mm) were distributed into five groups: Co (no surface treatment), Pr (primer), NTP (methane plasma), Pr+NTP and NTP+Pr. The effect of the treatment type on the surface free energy, morphology, topography and chemical composition of the Y-TZP discs was investigated. The discs were cemented to composite resin substrates using Panavia F2.0 or RelyX U200. Shear bond strength (n=10) analyses were performed (1mm/min) before and after thermocycling (5-55°C, 2000cycles) on the bonded specimens. The data were analyzed with one and three-way ANOVAs and Bonferroni tests (α=0.05). NTP reduced the surface energy and roughness of the Y-TZP discs. SEM-EDS and XPS analyses showed the presence of the organic thin film, which significantly improved the bond strength results when Rely X U200 was used, whereas the primer treatment was more effective with Panavia F2.0. Thermocycling significantly reduced the bond strength results of the NTP and Pr+NTP groups cemented with Rely X U200 and the Pr and NTP+Pr groups cemented with Panavia F2.0. Nonthermal plasma improves the bond strength between Rely X U200 and Y-TZP and also seems to have water-resistant behavior, whereas Panavia F2.0 showed better results when associated with primer.
目前尚无将氧化锆（Y-TZP）与树脂水门汀粘结的既定方案。非热等离子体（NTP）可能是解决与粘结相关临床问题的一种替代方法。本研究的目的是表征暴露于甲烷（CH）NTP的Y-TZP表面或涂覆一层金属合金底漆后的表面情况，以及这两种方法之间的关联，并评估NTP处理对Y-TZP与两种树脂水门汀之间粘结强度的影响。总共235个Y-TZP圆盘（8×2mm）被分为五组：Co（无表面处理）、Pr（底漆）、NTP（甲烷等离子体）、Pr+NTP和NTP+Pr。研究了处理类型对Y-TZP圆盘表面自由能、形态、形貌和化学成分的影响。使用Panavia F2.0或RelyX U200将圆盘粘结到复合树脂基底上。在对粘结试样进行热循环（5-55°C，2000次循环）之前和之后，以1mm/分钟的速度进行剪切粘结强度（n=10）分析。数据采用单因素和三因素方差分析以及Bonferroni检验（α=0.05）进行分析。NTP降低了Y-TZP圆盘的表面能和粗糙度。扫描电子显微镜-能谱分析（SEM-EDS）和X射线光电子能谱分析（XPS）显示存在有机薄膜，当使用Rely X U200时，这显著改善了粘结强度结果，而底漆处理在使用Panavia F2.0时更有效。热循环显著降低了用Rely X U200粘结的NTP和Pr+NTP组以及用Panavia F2.0粘结的Pr和NTP+Pr组的粘结强度结果。非热等离子体提高了Rely X U200与Y-TZP之间的粘结强度，并且似乎具有防水性能，而Panavia F2.0与底漆联合使用时显示出更好的结果。
