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氧化物陶瓷与三种树脂粘接剂粘接强度研究
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摘要
目的:
     通过对两种牙科修复用氧化物陶瓷Al2O3及ZrO2与三种树脂粘接剂PanaviaTM F、SuperbondC & B以及RelyXTMUnicem的粘接剪切强度比较,探讨适合牙科氧化物陶瓷的最佳树脂粘接材料,为临床中氧化物全瓷修复体的粘接提供一定的理论依据,从而可以保证不同材料的修复体获得最好的粘接而达到较好的远期修复效果。
     方法:
     将经过筛选的10mm×5mm×3mm的ZrO2及Al2O3陶瓷条形试件各48片用丙酮清洗;然后依次用220目、400目、600目砂纸打磨5mm×3mm的粘接表面;再将打磨好暴露新鲜瓷面的陶瓷粘接面用110μm的Al2O3喷砂15s,喷砂时陶瓷试件距喷头10mm,压力调至0.4Mpa;最后用无水酒精和蒸馏水分别超声清洗10min并将两种瓷片各自随机分为三组,每组16片。分别用三种树脂水门汀SuperbondC&B.RelyXTMUnicem.PanaviaTM F与喷砂后的ZrO2及Al2O3陶瓷的粘接面粘接,37℃水浴24h后测试其粘接剪切强度,并将粘接破坏后的粘接断面做扫描电镜及光镜观察。
     结果:
     1.Al2O3陶瓷组间均有显著性差异(P<0.0001),SuperbondC & B粘接强度最高为(37.60±2.06)Mpa,RelyXTMUnicem粘接强度最低为(20.05±1.79)MPaZrO2陶瓷组中SuperbondC & B与PanaviaTM F的粘接强度差异无显著性(P>0.05),RelyXTMUnicem粘接强度最低为(13.29±3.05)MPa。
     2.Superbond C & B对Al2O3的粘接强度高于ZrO2(P<0.05),PanaviaTM F对两种陶瓷的粘接无显著性差异(P>0.05),RelyXTMUnicem对Al2O3的粘接强度显著高于ZrO2(P<0.0001)。
     结论:
     1.SuperbondC & B、PanaviaTM F与氧化物陶瓷均具有较高的粘接强度,完全可以满足临床需要。
     2.一步法自酸蚀粘接剂RelyXTMUnicem虽然操作简便、提高了工作效率,但不如多步法系统获得的粘接强度大。
     3.对于固位形不良的修复体如瓷贴面、瓷嵌体以及基牙固位形较差的全瓷冠等需要选择粘接强度较高的粘接剂,从而达到远期的修复效果。
Objective:
     The purpose of this study was to confirm which is the best cement to each oxide ceramics by comparison of shear bond strength between oxide ceramics and three resin cements in order to choose the best bond agents of different materials and achieve better long-term results for the clinical applications.
     Methods:
     The intact ceramic bars were screend and treated by the 220、400、600-grid sand papers and then sandblasted by 110μm in diameter aluminium sesquioxide.At last,each block was washed repetedly by alcohol and distilled water. After that,each block was bonded with three different type of luting cements respectively,then preserved in 37℃water for 24h,the shear bond strength of these specimens were tested and the data were analyzed by SAS9.12 software package.
     Results:
     1.There were significant differences among alumina ceramics which manifested that shear bond strength,SuperbondC & B was the highest (37.60±2.06)MPa. However, in zirconium dioxide groups,RelyXTM MUnicem was presented the lowest bond strength(13.29±3.05)MPa,but there was no difference between SuperbondC & B and PanaviaTM F.
     2.The shear bond strength between SuperbondC & B and Al2O3 was higher than that of ZrO2,and so were RelyXTM Unicem groups.But in PanaviaTM F groups,the difference was no significance.
     Conclusions:
     1.Both SuperbondC & B and PanaviaTM F show good shear bond strength with oxide ceramics.
     2.RelyX Unicem which is the one-step and selfetch adhesive was less reliable.
     3.When restorations require good retention and high bond strength such as porcelain venees、inlays and some crowns on smaller abutment teeth,select the reliable resin adhesive for long term success.
引文
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