Acharya Gouri Smita, Manjunath Mk
Department of Conservative Dentistry and Endodontics, JSS Dental College, Mysore, India.
J Conserv Dent. 2012 Oct;15(4):383-7. doi: 10.4103/0972-0707.101919.
To assess the microtensile bond strength of repaired composite resin that was surface treated by diamond point or silicon carbide followed by bonding using either only total- etch bonding regimen or silane coupling agent with adhesive resin.
Fourteen composite blocks were aged under deionized water for 14 days. The bonding surface was prepared with coarse diamond point or silicon carbide. Two blocks with no surface treatment were used as control groups. The bonding regimen was either total-etch bonding regimen or silane coupling agent and bonding agent. The aged samples were then bonded to new composite. Five sections per block (each 1mm thick) were prepared; cut to obtain an adhesive zone of approximately 1mm(2) and subjected to microtensile bond strength testing.
The highest bond strength was obtained by surface treatment by coarse diamond point and total etch bonding regimen and least by silicon carbide and silane. A statistically significant difference was seen in all the four groups.
Surface treatment by a coarse diamond point and total-etch bonding regimen provides highest bond strength. Thus, a simpler treatment regimen can contribute to a better bond strength in repaired composites.
评估经金刚石磨头或碳化硅表面处理后，仅使用全酸蚀粘结方案或硅烷偶联剂与粘结树脂进行粘结的修复复合树脂的微拉伸粘结强度。
14个复合树脂块在去离子水中老化14天。用粗金刚石磨头或碳化硅制备粘结表面。将两个未进行表面处理的复合树脂块用作对照组。粘结方案为全酸蚀粘结方案或硅烷偶联剂与粘结剂。然后将老化后的样本与新的复合树脂进行粘结。每个复合树脂块制备5个切片（每个切片厚1mm）；切割以获得约1mm²的粘结区域，并进行微拉伸粘结强度测试。
通过粗金刚石磨头表面处理和全酸蚀粘结方案获得的粘结强度最高，而通过碳化硅和硅烷处理获得的粘结强度最低。四组之间存在统计学显著差异。
粗金刚石磨头表面处理和全酸蚀粘结方案可提供最高的粘结强度。因此，更简单的处理方案有助于提高修复复合树脂的粘结强度。
