Hewlett Sandra, Wadenya Rose O, Mante Francis K
Department of Restorative Dentistry, University of Ghana Dental School, Korle-bu, Ghana.
Compend Contin Educ Dent. 2010 Mar;31(2):140-6.
The purpose was to compare the shear bond strength of luting cements to foundation materials and to determine the effect of storage in lactate buffer solution.
Disks that were 8 mm in diameter and 2-mm thick were fabricated from foundation substrates: amalgam, composite resin, resin-modified glass ionomer, and glass ionomer (n = 20). Cylinders that were 2 mm in diameter and 4 mm in length of resin luting cement, resin-modified glass ionomer luting cement, and a glass ionomer luting cement were bonded to the foundation substrate materials. Shear bond strength of each foundation substrate material/cement pair was determined with a universal testing machine after 24 hours. A second set of specimens was tested after storage in a 0.01M lactate buffer solution for 24 hours. A three-way analysis of variance followed by pair-wise comparisons was performed to compare bond strengths (P < .05).
The resin cement provided the highest (P < .05) bond strengths to amalgam, composite resin, and resin-modified glass ionomer foundation materials while the glass ionomer cement showed the lowest bond strength (P < .05) to composite resin and glass ionomer foundation restoration materials. After immersion in a 0.01M lactate buffer solution, the shear bond strength of all the material combinations was significantly lower (P < .05) than nonimmersed specimens, except the bonds between composite resin foundation and resin luting cement, which significantly increased (P < .05) in strength.
The resin cement had the highest bond strength to most foundation substrates investigated. The highest bond was observed between the composite resin foundation and resin cement. This bond was also the most durable on immersion in lactic acid.
本研究旨在比较粘结水门汀与基底材料之间的剪切粘结强度，并确定乳酸缓冲溶液储存对其的影响。
用基底材料制作直径8mm、厚2mm的圆盘：汞合金、复合树脂、树脂改性玻璃离子水门汀和玻璃离子水门汀（n = 20）。将直径2mm、长4mm的树脂粘结水门汀、树脂改性玻璃离子粘结水门汀和玻璃离子粘结水门汀圆柱体粘结到基底材料上。24小时后，用万能试验机测定各基底材料/水门汀对的剪切粘结强度。将第二组试件在0.01M乳酸缓冲溶液中储存24小时后进行测试。采用三因素方差分析并进行两两比较以比较粘结强度（P < 0.05）。
树脂水门汀对汞合金、复合树脂和树脂改性玻璃离子基底材料的粘结强度最高（P < 0.05），而玻璃离子水门汀对复合树脂和玻璃离子基底修复材料的粘结强度最低（P < 0.05）。浸泡在0.01M乳酸缓冲溶液后，除复合树脂基底与树脂粘结水门汀之间的粘结强度显著增加（P < 0.05）外，所有材料组合的剪切粘结强度均显著低于未浸泡试件（P < 0.05）。
树脂水门汀对大多数研究的基底材料具有最高的粘结强度。复合树脂基底与树脂水门汀之间的粘结强度最高。这种粘结在乳酸浸泡中也是最持久的。
