Sorake Abhinay, Rai Rohan, Hegde Gautham, Suneja Ridhima, Kumar Naveena, Skaria Jibin
Reader, Department of Orthodontics and Dentofacial Orthopaedics, A.J. Institute of Dental Sciences, Mangalore, Karnataka, India.
Professor & Head, Department of Orthodontics and Dentofacial Orthopaedics, A.J. Institute of Dental Sciences, Mangalore, Karnataka, India.
J Int Oral Health. 2015 Jul;7(7):17-21.
In the past few years, there has been a major research drive to increase bond strength between dental materials and dental hard tissue and to reduce the associated demineralization around fixed orthodontic appliances. Thus, a recent approach is to incorporate an antibacterial agent into the primer to reduce the demineralization and enhance bond strength. The objective of this study was: (1) To evaluate the shear bond strength of orthodontic preadjusted edgewise appliance brackets bonded to extracted premolar teeth with antimicrobial self-etch primer (Reliance self-etching primer, Clearfil Protect Bond) and self-etching primer without antimicrobial agent (Clearfil SE bond). (2) To compare the mean shear bond strength values of the tested materials to conventional self-etching primer Transbond Plus.
A total of 125 extracted human premolar teeth were randomly divided into five groups of 25 teeth each. Each sample was embedded in an acrylic block of polymethyl meth acrylate resin till coronal portion. Instron testing machine model LR LOYD 50 K was used for testing the shear bond strength of individual samples.
The results of the study showed that all five groups had adequate clinically acceptable bond strength. In intergroup comparison, there was statistically significant difference in bond strength of Reliance self-etching primer, Promt L pop, Clearfil Protect Bond, clearfil SE bond and Transbond Plus.
Reliance self-etching primer showed highest bond strength, followed by Clearfil Protect Bond, clearfil SE bond, and Transbond Plus. Clearfil Protect Bond primer containing methacryloxy dodecyl pyridium bromide have been demonstrated to kill Streptococcus mutans within a short time of contact and also exhibits an inhibitory effect on the growth of bacteria on its surface.
在过去几年中，为了提高牙科材料与牙齿硬组织之间的粘结强度，并减少固定正畸矫治器周围相关的脱矿现象，已经开展了一项重大的研究工作。因此，最近的一种方法是在底漆中加入抗菌剂，以减少脱矿并提高粘结强度。本研究的目的是：（1）评估使用含抗菌自酸蚀底漆（信靠自酸蚀底漆、可乐丽保护粘结剂）和不含抗菌剂的自酸蚀底漆（可乐丽SE粘结剂）将正畸预调直丝矫治器托槽粘结到拔除的前磨牙上的剪切粘结强度。（2）将测试材料的平均剪切粘结强度值与传统自酸蚀底漆Transbond Plus进行比较。
总共125颗拔除的人类前磨牙被随机分为五组，每组25颗牙齿。每个样本嵌入聚甲基丙烯酸甲酯树脂的丙烯酸块中，直至冠部。使用LR LOYD 50K型英斯特朗测试机测试单个样本的剪切粘结强度。
研究结果表明，所有五组的粘结强度在临床上都足够可接受。在组间比较中，信靠自酸蚀底漆、Promt L pop、可乐丽保护粘结剂、可乐丽SE粘结剂和Transbond Plus的粘结强度存在统计学上的显著差异。
信靠自酸蚀底漆显示出最高的粘结强度，其次是可乐丽保护粘结剂、可乐丽SE粘结剂和Transbond Plus。含有甲基丙烯酰氧基十二烷基溴化吡啶的可乐丽保护粘结剂底漆已被证明在短时间接触内可杀死变形链球菌，并且对其表面细菌的生长也具有抑制作用。
