McCaghren R A, Retief D H, Bradley E L, Denys F R
Department of Biomaterials, University of Alabama School of Dentistry, Birmingham.
J Dent Res. 1990 Jan;69(1):40-5. doi: 10.1177/00220345900690010601.
The shear bond strengths of a light-cured glass-ionomer cement to enamel and dentin were determined with use of extracted human maxillary permanent canines and molars. Bonding sites on the ground, etched enamel and ground dentin surfaces were demarcated by the punching of a hole, 3 mm in diameter, in an adhesive tape. The mixed glass-ionomer cement was transferred to the demarcated site, cured by exposure to visible light for 30 s, and the cement surface treated with Scotchprep Dentin Primer followed by Scotchbond 2 Light Cure Dental Adhesive. The embedded teeth were positioned in an assembly apparatus, and Silux composite was bonded to the glass-ionomer-cement surfaces. The specimens were disassembled after 15 min and subjected to a shear load (in an Instron machine) immediately after disassembly; after storage in water at 37 degrees C for 24 h, without and with temperature cycling; and after storage in water for four weeks, without and with temperature cycling. The shear bond strength of the glass-ionomer cement to etched enamel was in the order of 12 MN.m-2, and to dentin it was 9 MN.m-2. Temperature cycling and duration of storage had no adverse effect on the shear bond strength. The enamel and dentin aspects of fractured test specimens were examined, and the percentage of the bonding area that failed in the cement was estimated. Most of the test specimens failed partly at the enamel and dentin interfaces and within the glass-ionomer cement.
利用拔除的人类上颌恒尖牙和磨牙，测定了光固化玻璃离子水门汀与釉质和牙本质之间的剪切粘结强度。在经过打磨、酸蚀处理的釉质表面和打磨过的牙本质表面上，通过在胶带上冲一个直径3毫米的孔来划定粘结区域。将混合好的玻璃离子水门汀转移至划定区域，通过可见光照射30秒进行固化，然后用Scotchprep牙本质底漆处理水门汀表面，接着使用Scotchbond 2光固化牙科粘合剂。将嵌入的牙齿放置在一个组装装置中，然后将Silux复合树脂粘结到玻璃离子水门汀表面。15分钟后将标本拆解，并在拆解后立即（在Instron机器上）施加剪切载荷；在37摄氏度的水中储存24小时后，分别在未进行和进行温度循环的情况下施加剪切载荷；以及在水中储存四周后，同样在未进行和进行温度循环的情况下施加剪切载荷。玻璃离子水门汀与酸蚀釉质之间的剪切粘结强度约为12 MN.m-2，与牙本质之间的剪切粘结强度为9 MN.m-2。温度循环和储存时间对剪切粘结强度没有不利影响。检查断裂测试标本的釉质和牙本质部分，并估算在水门汀中失效的粘结面积百分比。大多数测试标本部分在釉质和牙本质界面以及玻璃离子水门汀内部失效。
