Banomyong Danuchit, Palamara Joseph E A, Burrow Michael F, Messer Harold H
Restorative Dentistry Section, School of Dental Science, The University of Melbourne, Melbourne, Vic, Australia.
Eur J Oral Sci. 2007 Dec;115(6):502-9. doi: 10.1111/j.1600-0722.2007.00483.x.
The purpose of this study was to compare fluid flow rates across dentin surfaces treated with four conditioners. The effect of conditioning on the micro-shear bond strengths of glass ionomer cement (Fuji IX GP) and resin-based adhesives (Single Bond 2 or Clearfil SE Bond) were also investigated. Under a simulated pressure of 1.3 kPa, two dentin conditioners, phosphoric acid, and a self-etching primer were applied to the dentin surfaces. Dentinal fluid flows at baseline and after conditioning were recorded for 15 min each. The conditioned surfaces were examined using a scanning electron microscope. The micro-shear bond strengths of the glass ionomer cement and of the resin-based adhesives bonded to conditioned dentin surfaces were evaluated while simulated intrapulpal pressure was maintained at 0 or 1.3 kPa. Only the dentin surface etched with phosphoric acid showed a significant increase in permeability. Micro-shear bond strengths of Fuji IX GP were not affected by conditioning the dentin surfaces or by bonding at different intrapulpal pressures (0 or 1.3 kPa). The effects on bond strengths of resin-based adhesives depended on the system used. The simulated positive intrapulpal pressure during bonding significantly affected the adherence of Single Bond 2, whereas Clearfil SE Bond was unaffected.
本研究的目的是比较经四种调节剂处理的牙本质表面的液体流速。还研究了调节对玻璃离子水门汀（Fuji IX GP）和树脂基粘合剂（Single Bond 2或Clearfil SE Bond）微剪切粘结强度的影响。在1.3 kPa的模拟压力下，将两种牙本质调节剂、磷酸和一种自酸蚀底漆应用于牙本质表面。分别记录基线时和调节后的牙本质液流动15分钟。使用扫描电子显微镜检查经调节的表面。在模拟牙髓腔内压力保持在0或1.3 kPa的情况下，评估粘结到经调节牙本质表面的玻璃离子水门汀和树脂基粘合剂的微剪切粘结强度。只有用磷酸蚀刻的牙本质表面显示出渗透性显著增加。Fuji IX GP的微剪切粘结强度不受牙本质表面调节或在不同牙髓腔内压力（0或1.3 kPa）下粘结的影响。对树脂基粘合剂粘结强度的影响取决于所使用的体系。粘结过程中模拟的正牙髓腔内压力显著影响Single Bond 2的粘结，而Clearfil SE Bond不受影响。
