Attar Nuray, Taner Tulin Ugur, Tülümen Erhan, Korkmaz Yonca
Department of Conservative Dentistry, School of Dentistry, Hacettepe University, 06100, Shhiye, Ankara, Turkey.
Angle Orthod. 2007 May;77(3):518-23. doi: 10.2319/0003-3219(2007)077[0518:SBSOOB]2.0.CO;2.
To assess and compare the effects of one- and two-step self-etching primer and adhesive with conventional acid-etching and bonding system on the shear bond strength of orthodontic brackets.
The one-step self-etching primer and adhesive used was Clearfil tri-S bond, the two-step fluoride-releasing antibacterial self-etching primer and adhesive was Clearfil Protect Bond, and the fluoride-releasing conventional acid-etching and bonding system was Kurasper F Bond. Brackets were bonded to defect-free human premolars (n = 14 per group) according to each manufacturer's recommendations by using light-cured bracket adhesive Kurasper F Paste with a light-emitting diode of a light-curing unit. The specimens were stored in deionized water at 37 degrees C for 48 hours and then tested in shear with a universal testing machine at a crosshead speed of 5 mm/min until the brackets debonded. The mode of failure of the brackets was determined by a modified adhesive remnant index.
Mean shear bond strength values were 9.00 MPa for Kurasper F Bond, 9.55 MPa for Clearfil Protect Bond, and 9.48 MPa for Clearfil tri-S Bond. One-way analysis of variance detected no statistically significant difference among groups (P = .98, P > .05). The predominant failure for the three groups was at the bracket-adhesive interface leaving less than 25% of the adhesive on the bracket base.
One-step self-etching adhesive and two-step fluoride-releasing antibacterial self-etching adhesive have sufficient mechanical properties for the bonding of orthodontic brackets.
评估并比较一步法和两步法自酸蚀底漆及粘合剂与传统酸蚀粘结系统对正畸托槽剪切粘结强度的影响。
使用的一步法自酸蚀底漆及粘合剂为Clearfil tri-S bond，两步法含氟抗菌自酸蚀底漆及粘合剂为Clearfil Protect Bond，含氟传统酸蚀粘结系统为Kurasper F Bond。根据各制造商的建议，使用光固化托槽粘合剂Kurasper F Paste和光固化单元的发光二极管，将托槽粘结到无缺陷的人类前磨牙上（每组14颗）。将标本在37℃的去离子水中储存48小时，然后用万能试验机以5mm/min的十字头速度进行剪切测试，直至托槽脱粘。通过改良的粘合剂残留指数确定托槽的失效模式。
Kurasper F Bond的平均剪切粘结强度值为9.00MPa，Clearfil Protect Bond为9.55MPa，Clearfil tri-S Bond为9.48MPa。单因素方差分析未检测到组间有统计学显著差异（P = 0.98，P>0.05）。三组的主要失效发生在托槽-粘合剂界面，托槽底座上残留的粘合剂不到25%。
一步法自酸蚀粘合剂和两步法含氟抗菌自酸蚀粘合剂具有足够的机械性能用于正畸托槽的粘结。
