Bond strength of resin luting cements with various film thickness

本研究的目的是建立树脂粘结剂的膜厚与粘结强度之间的关系，并确定临床上最可接受的树脂粘结剂的膜厚。采用树脂胶结剂（Super Bond C&B, Panavia EX, chemistry）和磷酸锌胶结剂（Elite cement 100）分别将锥形的制备物胶结在不锈钢板的孔中。随着固井的进行，膜厚在30 ~ 250mum范围内变化，并测量了固井截留量。并对热循环试验的影响进行了研究。研究结果如下：经对数回归分析，所有材料的胶结膜厚度与固位呈负相关。2. Elite水泥100、Panavia EX、chemace的固位率随膜厚的增加而显著降低，且在膜厚的宽度下，热循环试验的影响很小。3. 在不进行热循环的情况下，随着膜厚的增加，Super Bond C&B的保留率仅略有下降。热循环条件下，膜厚越窄，固载率越高，随着膜厚的增加，固载率显著降低。4. 用Panavia EX和Super Bond C&B分别对铸件进行热处理和喷砂后镀锡，固相率提高了20 ~ 30%。

The purpose of this study was to establish the relationship between film thickness of resin luting cements and bond strength and to determine what film thickness of the resin luting cements is most acceptable in the clinic.The cone-shaped preparation was cemented into the hole of the stainless steel plate with the resin luting cements (Super Bond C&B, Panavia EX, Chemiace) and the zinc phosphate cement (Elite Cement 100), respectively. With the cementing, the film thickness changed in a range of 30-250mum and the retentions were measured. The effect of thermal cycling test was also investigated. The results are as follows;1. All the materials tested showed a negative correlation between film thickness of the cements and the retention as calculated by logarithmic regression analysis. 2. The retention of Elite cement 100, Panavia EX, Chemiace decreased greatly with an increase of film thickness and the effect of the thermal cycling test was only slight in spite of the width of film thickness. 3. Super Bond C&B showed only a slight decrease in retention with an increase of film thickness without thermal cycling. However, with thermal cycling the retention was high with a narrow film thickness and decreased significantly with an increase of film thickness. 4. With the heat-treatment and the Sn plating after sand blasting of the cast cemented with Panavia EX and Super Bond C&B respectively, the retention increased 20 - 30 %.