Kitayama Yoshitaka, Komori Akira, Nakahara Rizako
Department of Orthodontics, The Nippon Dental University, Tokyo, Japan.
Angle Orthod. 2003 Aug;73(4):451-6. doi: 10.1043/0003-3219(2003)073<0451:TASBSO>2.0.CO;2.
The purpose of this study was to measure the tensile and shear bond strength of resin-reinforced glass ionomer cement (RGIC) to glazed porcelain, to evaluate the durability of RGIC by thermal cycling, and to examine the RGIC remaining on the surface of the porcelain after the bond strength test to evaluate bonding conditions. Three adhesives were used in this study: Concise (CO) as a chemically cured composite resin, Fuji ORTHO (FO) as a chemically cured RGIC, and Fuji ORTHO LC (FOLC) as a light-cured RGIC. Tensile and shear bond strengths were measured 24 hours after bonding orthodontic brackets and also after thermal cycling. Tensile bond strength after 24 hours was 6.6 +/- 3.2 MPa in CO, 7.3 +/- 1.4 MPa in FO, and 8.6 +/- 1.9 MPa in FOLC, and the strength significantly decreased after the thermal cycling test. Shear bond strength after 24 hours was 32.5 +/- 8.9 MPa in CO, 23.3 +/- 6.8 MPa in FO, and 24.7 +/- 6.5 MPa in FOLC, and in contrast to tensile bond strength, no decreases in the strength were detected after the thermal cycling test. CO showed significantly higher shear bond strength than did FO and FOLC. When using the shear bond strength test and CO, destruction of porcelain surfaces frequently occurred after 24 hours and was observed in every specimen after the thermal cycling. RGIC was found to be an advantageous alternative to resin adhesive for bracket bonding to porcelain and to enamel.
本研究的目的是测量树脂增强玻璃离子水门汀（RGIC）与釉质瓷的拉伸和剪切粘结强度，通过热循环评估RGIC的耐久性，并在粘结强度测试后检查瓷表面残留的RGIC以评估粘结情况。本研究使用了三种粘结剂：作为化学固化复合树脂的Concise（CO）、作为化学固化RGIC的Fuji ORTHO（FO）和作为光固化RGIC的Fuji ORTHO LC（FOLC）。在粘结正畸托槽24小时后以及热循环后测量拉伸和剪切粘结强度。24小时后的拉伸粘结强度在CO中为6.6±3.2MPa，在FO中为7.3±1.4MPa，在FOLC中为8.6±1.9MPa，热循环测试后强度显著降低。24小时后的剪切粘结强度在CO中为32.5±8.9MPa，在FO中为23.3±6.8MPa，在FOLC中为24.7±6.5MPa，与拉伸粘结强度相反，热循环测试后未检测到强度降低。CO显示出比FO和FOLC显著更高的剪切粘结强度。当使用剪切粘结强度测试和CO时，24小时后瓷表面经常发生破坏，热循环后在每个标本中均观察到。发现RGIC是用于托槽粘结到瓷和釉质的树脂粘结剂的有利替代品。
