Amaral Regina, Ozcan Mutlu, Bottino Marco Antonio, Valandro Luiz Felipe
São Paulo State University, Department of Dental Materials and Prosthodontics, São José dos Campos, Brazil.
Dent Mater. 2006 Mar;22(3):283-90. doi: 10.1016/j.dental.2005.04.021. Epub 2005 Jul 21.
This study evaluated the effect of three surface conditioning methods on the microtensile bond strength of resin cement to a glass-infiltrated zirconia-reinforced alumina-based core ceramic.
Thirty blocks (5 x 5 x 4 mm) of In-Ceram Zirconia ceramics (In-Ceram Zirconia-INC-ZR, VITA) were fabricated according to the manufacturer's instructions and duplicated in resin composite. The specimens were polished and assigned to one of the following three treatment conditions (n=10): (1) Airborne particle abrasion with 110 microm Al(2)O(3) particles + silanization, (2) Silica coating with 110 microm SiO(x) particles (Rocatec Pre and Plus, 3M ESPE) + silanization, (3) Silica coating with 30 microm SiO(x) particles (CoJet, 3M ESPE) + silanization. The ceramic-composite blocks were cemented with the resin cement (Panavia F) and stored at 37 degrees C in distilled water for 7 days prior to bond tests. The blocks were cut under coolant water to produce bar specimens with a bonding area of approximately 0.6mm(2). The bond strength tests were performed in a universal testing machine (cross-head speed: 1mm/min). The mean bond strengths of the specimens of each block were statistically analyzed using ANOVA and Tukey's test (alpha<or=0.05).
Silica coating with silanization either using 110 microm SiO(x) or 30 microm SiO(x) particles increased the bond strength of the resin cement (24.6+/-2.7 MPa and 26.7+/-2.4 MPa, respectively) to the zirconia-based ceramic significantly compared to that of airborne particle abrasion with 110-microm Al(2)O(3) (20.5+/-3.8 MPa) (ANOVA, P<0.05).
Conditioning the INC-ZR ceramic surfaces with silica coating and silanization using either chairside or laboratory devices provided higher bond strengths of the resin cement than with airborne particle abrasion using 110 microm Al(2)O(3).
本研究评估了三种表面处理方法对树脂水门汀与玻璃渗透氧化锆增强氧化铝基核陶瓷之间微拉伸粘结强度的影响。
按照制造商的说明制作30个（5×5×4mm）In-Ceram氧化锆陶瓷块（In-Ceram Zirconia-INC-ZR，维他公司），并在树脂复合材料中复制。将标本抛光并分配到以下三种处理条件之一（n = 10）：（1）用110微米Al₂O₃颗粒进行空气颗粒研磨+硅烷化处理；（2）用110微米SiOₓ颗粒进行二氧化硅涂层处理（Rocatec Pre和Plus，3M ESPE）+硅烷化处理；（3）用30微米SiOₓ颗粒进行二氧化硅涂层处理（CoJet，3M ESPE）+硅烷化处理。陶瓷-复合材料块用树脂水门汀（Panavia F）粘结，并在粘结测试前于37℃蒸馏水中储存7天。在冷却水下切割块体以制备粘结面积约为0.6mm²的条形标本。粘结强度测试在万能试验机上进行（十字头速度：1mm/分钟）。使用方差分析和Tukey检验（α≤0.05）对每个块体标本的平均粘结强度进行统计分析。
与用110微米Al₂O₃进行空气颗粒研磨（20.5±3.8MPa）相比，使用110微米SiOₓ颗粒或30微米SiOₓ颗粒进行硅烷化二氧化硅涂层处理显著提高了树脂水门汀与氧化锆基陶瓷之间的粘结强度（分别为24.6±2.7MPa和26.7±2.4MPa）（方差分析，P<0.05）。
使用椅旁或实验室设备通过二氧化硅涂层和硅烷化处理INC-ZR陶瓷表面，比使用110微米Al₂O₃进行空气颗粒研磨提供了更高的树脂水门汀粘结强度。
