Williams V D, Diaz-Arnold A, Aquilino S A
Department of Family Dentistry, University of Iowa, College of Dentistry, Iowa City.
J Prosthet Dent. 1992 Mar;67(3):289-92. doi: 10.1016/0022-3913(92)90231-x.
Recently, new luting materials have been claimed to have adhesion to metal and tooth structure. This study determined if rebonding the specimens affected their tensile bond strength. Ten samples each of Rexillium III metal cylinders (12 x 6.3 mm) were bonded and rebonded with Comspan Panavia and Super-bond materials. The film thickness was controlled with a micrometer device at 20 microns. The samples were stored for 24 hours in deionized water at 37 degrees C and were then thermocycled for 24 hours and tested for tensile failure on an Instron testing machine. A stereomicroscope was used to determine adhesive/cohesive failure. The results showed a significant difference at p greater than 0.01 in tensile bond strengths (bond versus rebond strength) for all three luting agents. Most of the failures were adhesive in nature.
最近，有声称新型粘结材料对金属和牙齿结构具有附着力。本研究确定重新粘结样本是否会影响其拉伸粘结强度。分别用Comspan Panavia和Super-bond材料对10个Rexillium III金属圆柱体样本（12×6.3毫米）进行粘结和重新粘结。使用测微仪将薄膜厚度控制在20微米。样本在37℃的去离子水中储存24小时，然后进行24小时热循环，并在英斯特朗测试机上测试拉伸破坏情况。使用体视显微镜确定粘结/内聚破坏。结果显示，所有三种粘结剂的拉伸粘结强度（粘结强度与重新粘结强度）在p大于0.01时存在显著差异。大多数破坏本质上是粘结性的。
