Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, USA.
J Esthet Restor Dent. 2011 Dec;23(6):390-6. doi: 10.1111/j.1708-8240.2011.00465.x. Epub 2011 Oct 17.
statement of problem: Self-etch adhesives typically are mildly acidic and therefore less effective than etch-and-rinse adhesives for bonding to enamel.
The purpose of this study was to evaluate the enamel and dentin shear bond strengths of a new two-step self-etch adhesive system, OptiBond XTR (Kerr Corporation, Orange, CA, USA).
The labial surfaces of 80 bovine teeth were ground to create flat, 600-grit enamel or dentin surfaces. Composite was bonded to enamel or dentin using the new two-step self-etch system or a three-step etch-and-rinse (OptiBond FL, Kerr), two-step self-etch (Clearfil SE Bond, Kuraray America, Houston, TX, USA), or one-step self-etch adhesive (Xeno IV, Dentsply Caulk, Milford, DE, USA). Following storage in water for 24 hours, shear bond strengths were determined using a universal testing machine. The enamel and dentin data sets were subjected to separate analysis of variance and Tukey's tests. Scanning electron microscopy was used to evaluate the effects of each system on enamel.
Mean shear bond strengths to enamel ranged from 18.1 MPa for Xeno IV to 41.0 MPa for OptiBond FL. On dentin, the means ranged from 33.3 MPa for OptiBond FL to 47.1 MPa for Clearfil SE Bond. OptiBond XTR performed as well as Clearfil SE Bond on dentin and as well as OptiBond FL on enamel. Field emission scanning electron microscope revealed that OptiBond XTR produced an enamel etch pattern that was less defined than that of OptiBond FL (37.5% phosphoric acid) but more defined than that of Clearfil SE Bond or Xeno IV.
The new two-step self-etch adhesive system formed excellent bonds to enamel and dentin in vitro.
OptiBond XTR, a new two-step self-etch adhesive system, is a promising material for bonding to enamel as well as to dentin.
本研究旨在评估一种新型两步自酸蚀粘结剂 OptiBond XTR（ Kerr 公司，美国加利福尼亚州奥兰治）的牙釉质和牙本质剪切粘结强度。
80 颗牛牙的唇面被研磨成平整的 600 粒度牙釉质或牙本质表面。使用新型两步自酸蚀系统或三步酸蚀-冲洗（OptiBond FL，Kerr）、两步自酸蚀（Clearfil SE Bond，Kuraray America，德克萨斯州休斯顿）或一步自酸蚀粘结剂（Xeno IV，Dentsply Caulk，特拉华州米尔福德）将复合树脂粘结到牙釉质或牙本质上。水储存 24 小时后，使用万能试验机测定剪切粘结强度。对牙釉质和牙本质数据集进行了单独的方差分析和 Tukey 检验。使用扫描电子显微镜评估每种系统对牙釉质的影响。
Xeno IV 的牙釉质平均剪切粘结强度为 18.1MPa，OptiBond FL 为 41.0MPa。在牙本质上，OptiBond FL 的平均值为 33.3MPa，Clearfil SE Bond 的平均值为 47.1MPa。OptiBond XTR 在牙本质上的性能与 Clearfil SE Bond 相当，在牙釉质上与 OptiBond FL 相当。场发射扫描电子显微镜显示，OptiBond XTR 产生的牙釉质蚀刻图案不如 OptiBond FL（37.5%磷酸）清晰，但比 Clearfil SE Bond 或 Xeno IV 更清晰。
新型两步自酸蚀粘结剂系统在体外对牙釉质和牙本质形成了极好的粘结。
OptiBond XTR 是一种新型两步自酸蚀粘结剂系统，是一种有前途的牙釉质和牙本质粘结材料。
