Zhang Wei, Masumi Shin Ichi, Song Xiao Meng
Department of Prosthodontics, Research Institute of Stomatology, Nanjing Medical University, China.
Quintessence Int. 2010 Jul-Aug;41(7):e132-40.
To investigate whether a stable bond could be obtained between resin-reinforced glass-ionomer cement and zirconia ceramic.
Sixty disk specimens of a dental ceramic (Cercon zirconia ceramic, Dentsply) were made and treated by airborne-particle abrasion. They were divided into three groups and bonded to two resin-reinforced glass-ionomer cements (RelyX Luting [3M ESPE] and Fuji Plus [GC]) and one resin cement (Panavia F, Kuraray) as a control group. All bonded specimens of each group (n = 20) were stored in distilled water (37 degrees C) for 24 hours, and half were additionally aged by thermocycling (20,000 times). Shear bond strength test was performed to measure the bond strength. Statistical analyses were performed using one-way ANOVA and paired t test with a = .05. The interfacial morphology of debonded specimens was observed by using a scanning electron microscope, and the mode of bonding fracture was evaluated.
The initial shear bond strength (in 24 hours) of the two resin-reinforced glass-ionomer cements to zirconia ceramic was 17.33 +/- 3.53 MPa and 16.68 +/- 2.76 MPa, and it dropped significantly to 7.62 +/- 2.17 MPa and 4.65 +/- 2.02 MPa after thermocycling. In the control group, the initial shear bond strength was 26.25 +/- 5.61 MPa, and there was no obvious decrease after thermocycling. The bonding failure of resin-reinforced glass-ionomer cements was mostly adhesive failure between cement and ceramic.
Resin-reinforced glass-ionomer cement could not offer a stable bond to abraded zirconia ceramic after thermocycling, and there was no durable chemical or mechanical bond between resin-reinforced glass-ionomer cement and zirconia ceramic.
研究树脂增强型玻璃离子水门汀与氧化锆陶瓷之间能否形成稳定的粘结。
制作60个牙科陶瓷（Cercon氧化锆陶瓷，登士柏公司）圆盘试件，并进行空气颗粒喷砂处理。将它们分为三组，分别与两种树脂增强型玻璃离子水门汀（RelyX Luting[3M ESPE]和Fuji Plus[GC]）以及一种树脂水门汀（Panavia F，可乐丽公司）粘结作为对照组。每组所有粘结试件（n = 20）在蒸馏水（37℃）中储存24小时，其中一半试件额外进行热循环老化（20000次）。进行剪切粘结强度测试以测量粘结强度。采用单因素方差分析和配对t检验进行统计学分析，α = 0.05。使用扫描电子显微镜观察脱粘试件的界面形态，并评估粘结断裂模式。
两种树脂增强型玻璃离子水门汀与氧化锆陶瓷的初始剪切粘结强度（24小时时）分别为17.33±3.53MPa和16.68±2.76MPa，热循环后显著降至7.62±2.17MPa和4.65±2.02MPa。对照组的初始剪切粘结强度为26.25±5.61MPa，热循环后无明显下降。树脂增强型玻璃离子水门汀粘结失败主要是水门汀与陶瓷之间的粘结性失败。
树脂增强型玻璃离子水门汀在热循环后不能为磨损的氧化锆陶瓷提供稳定的粘结，树脂增强型玻璃离子水门汀与氧化锆陶瓷之间不存在持久的化学或机械粘结。
