Korbmacher H, Huck L, Adam T, Kahl-Nieke B
Department of Orthodontics, Centre of Dental and Oral Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Eur J Orthod. 2006 Oct;28(5):457-61. doi: 10.1093/ejo/cjl013. Epub 2006 Jun 8.
The enhanced risk of dental caries is one negative side-effect of fixed appliances. A new antimicrobial and fluoride-releasing self-etching bonding system (Clearfil Protect Bond) has been introduced in restorative dentistry and clinical studies have already shown the potential for this primer to be used clinically with effective antiplaque properties. Therefore, this in vitro study was conducted in order to evaluate the new primer in comparison with a conventional bonding preparation. One hundred and twenty extracted human teeth were randomly divided into three groups of 40 specimens each (20 incisors, 20 premolars). In group 1 a conventional bonding procedure was used (etching, Transbond XT), in group 2 the new primer was used according to the manufacturer's recommendations when bonding to intact enamel, while in group 3 the new primer was used without prior etching. Shear bond strength (SBS) was measured with a universal testing machine and the adhesive remaining after debonding was determined using an optical microscope at x10 magnification. The adhesive remnant index was used in order to assess the mode of failure. No enamel fractures were detected in any of the specimens. In all groups acceptable bond strengths were observed. The only statistically significant difference (P = 0.004) was found for the incisors in group 2, which showed the highest mean SBS (17.46 MPa). Considering the acceptable bond strength and the mode of failure, use of the new primer without prior etching is recommended in patients with fixed appliances. Further in vivo studies will be carried out in order to evaluate clinical performance.
龋齿风险增加是固定矫治器的一个负面副作用。一种新型抗菌且能释放氟化物的自酸蚀粘结系统（Clearfil Protect Bond）已被引入修复牙科领域，临床研究已表明这种底漆具有在临床上用于有效防牙菌斑的潜力。因此，进行了这项体外研究，以评估这种新型底漆与传统粘结制剂相比的效果。120颗拔除的人牙被随机分为三组，每组40个样本（20颗切牙，20颗前磨牙）。第1组采用传统粘结程序（酸蚀，Transbond XT），第2组在粘结完整釉质时按照制造商的建议使用新型底漆，而第3组在未预先酸蚀的情况下使用新型底漆。用万能试验机测量剪切粘结强度（SBS），并使用10倍放大倍数的光学显微镜确定脱粘后残留的粘结剂。使用粘结剂残留指数来评估失败模式。在任何样本中均未检测到釉质骨折。在所有组中均观察到了可接受的粘结强度。唯一具有统计学显著差异（P = 0.004）的是第2组的切牙，其平均SBS最高（17.46 MPa）。考虑到可接受的粘结强度和失败模式，建议在使用固定矫治器的患者中使用未预先酸蚀的新型底漆。将进行进一步的体内研究以评估临床性能。
