Grubisa Helen S I, Heo Giseon, Raboud Don, Glover Kenneth E, Major Paul W
Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada.
Am J Orthod Dentofacial Orthop. 2004 Aug;126(2):213-9; quiz 255. doi: 10.1016/j.ajodo.2004.01.016.
The bonding of orthodontic brackets to enamel is a multistep process. To simplify bonding and decrease chair time, Transbond Plus Self-Etching Primer (3M Unitek, Monrovia, Calif) has been introduced; the primer combines the etching, rinsing, and priming steps. This in vitro study evaluated the shear bond strengths and interoperator variability of self-etching primer, as compared with conventional phosphoric acid etching with 2 common orthodontic resins. A total of 214 teeth were bonded, according to the following protocols: group A: self-etching primer plus Transbond XT light-cured resin (3M Unitek); group B: 35% phosphoric acid (15 seconds) plus Transbond XT resin; and group C: 37% phosphoric acid (15 seconds) plus Enlight bonding resin (Ormco, Glendora, Calif). Significantly higher bond strengths were seen in group B than in group A (P =.004) and group C (P =.002). The mean shear bond strengths of group A were not significantly different from those of group C (P =.99). When 3 orthodontists bonded a total of 60 premolars using the protocols of groups A and B, significant differences in shear bond strengths and strength ranking were found. The mean values they obtained using the self-etching primer were not significantly different, but significant differences in mean values were found between operators when the phosphoric acid-etching technique was used.
正畸托槽与牙釉质的粘结是一个多步骤过程。为简化粘结并减少就诊时间，已推出Transbond Plus自酸蚀底漆（3M Unitek，加利福尼亚州蒙罗维亚）；该底漆将酸蚀、冲洗和底漆步骤结合在一起。本体外研究评估了自酸蚀底漆的剪切粘结强度和不同操作人员之间的差异，并与使用两种常见正畸树脂的传统磷酸酸蚀法进行了比较。根据以下方案，共粘结了214颗牙齿：A组：自酸蚀底漆加Transbond XT光固化树脂（3M Unitek）；B组：35%磷酸（15秒）加Transbond XT树脂；C组：37%磷酸（15秒）加Enlight粘结树脂（奥美科，加利福尼亚州格伦多拉）。B组的粘结强度显著高于A组（P = 0.004）和C组（P = 0.002）。A组的平均剪切粘结强度与C组无显著差异（P = 0.99）。当3名正畸医生按照A组和B组的方案粘结总共60颗前磨牙时，发现剪切粘结强度和强度排名存在显著差异。他们使用自酸蚀底漆获得的平均值无显著差异，但使用磷酸酸蚀技术时，不同操作人员之间的平均值存在显著差异。
