McInnes-Ledoux P M, Ledoux W R, Weinberg R
Department of Orthodontics, Louisiana State University School of Dentistry, New Orleans 70119.
J Dent Res. 1989 May;68(5):823-5. doi: 10.1177/00220345890680051401.
Accurate intracoronal castings can be produced using a castable ceramic--DICOR--for which there is a need to identify a suitable luting cement. The aim of this investigation was to evaluate the bond strength of three glass-ionomer luting cements and one resin cement to treated and untreated DICOR, enamel, and dentin surfaces. Forty "cerammed" DICOR specimens were assigned to four groups: (1-3) grit-blasting and bonding to each of the three glass-ionomer cements; and (4) acid-etching, silane coating, and bonding to the resin cement. Seventy enamel specimens were assigned to seven groups: (1-3) no etching and bonding to each of the glass-ionomer cements; (4-7) acid-etching and bonding to the glass-ionomer cements and the resin cement. Seventy dentin specimens were assigned to seven groups: (1-4) bonding to each of the three glass-ionomer cements and the resin cement; (5-7) polyacrylic acid preconditioning and bonding to each of the three glass-ionomer cements. The mean resin cement bond strengths (MN/m2) to DICOR (9.4) and to etched enamel (10.7) were significantly greater (p less than 0.01) than those of the glass-ionomer cements (DICOR, 0.8-1.2; enamel, 0.4-0.9). Preconditioning of enamel and dentin significantly increased (p less than 0.05) the bond strengths to the glass-ionomer cements. The mean bond strength of the resin cement to untreated dentin (4.3) was significantly higher (p less than 0.05) than the glass-ionomer bond strengths to untreated dentin (1.0-1.7) and to preconditioned dentin (2.1-3.3). The high bond strengths achieved with the resin cement are encouraging. Selected surface treatment of DICOR, enamel, and dentin prior to luting should be clinically useful.
使用可铸型陶瓷——DICOR可以制作出精确的冠内铸造体，为此需要确定一种合适的粘结水门汀。本研究的目的是评估三种玻璃离子粘结水门汀和一种树脂水门汀与经过处理和未经处理的DICOR、牙釉质及牙本质表面之间的粘结强度。四十个“陶瓷化的”DICOR标本被分为四组：（1 - 3）喷砂处理并分别与三种玻璃离子水门汀粘结；（4）酸蚀、硅烷涂层处理并与树脂水门汀粘结。七十个牙釉质标本被分为七组：（1 - 3）不进行酸蚀处理并分别与三种玻璃离子水门汀粘结；（4 - 7）酸蚀处理并分别与三种玻璃离子水门汀及树脂水门汀粘结。七十个牙本质标本被分为七组：（1 - 4）分别与三种玻璃离子水门汀及树脂水门汀粘结；（5 - 7）用聚丙烯酸预处理并分别与三种玻璃离子水门汀粘结。树脂水门汀与DICOR（9.4）以及与酸蚀牙釉质（10.7）之间的平均粘结强度（MN/m²）显著高于（p小于0.01）玻璃离子水门汀的粘结强度（DICOR，0.8 - 1.2；牙釉质，0.4 - 0.9）。牙釉质和牙本质的预处理显著提高了（p小于0.05）与玻璃离子水门汀的粘结强度。树脂水门汀与未经处理牙本质之间的平均粘结强度（4.3）显著高于（p小于0.05）玻璃离子水门汀与未经处理牙本质（1.0 - 1.7）以及与预处理牙本质（2.1 - 3.3）之间的粘结强度。树脂水门汀所获得的高粘结强度令人鼓舞。在粘结之前对DICOR、牙釉质和牙本质进行选定的表面处理在临床上应该是有用的。
