A New Non-Acidic Pretreatment of Dentinal Smear Layr

提高牙科用树脂（如复合树脂）的粘附性在临床上是必不可少的。如何在粘接前对牙本质表面进行处理是提高粘接强度的关键。我们最近尝试使用无机非酸性盐溶液对牙本质进行预处理。我们注意到硫氰酸盐的盐溶作用，它促进胶原蛋白和明胶的溶胀。对于预处理，我们使用硫氰酸钾（KSCN）溶液。硫氰酸钾通常被称为硫氰化钾，通常存在于人类静息唾液中，浓度为15 mg/100 ml。本研究从形态学上评价了硫氰酸盐与三氯化铁等交联剂联合应用对牙本质玷污层的治疗效果。用800粒度的碳化硅纸在牛牙唇面上研磨制备均匀的玷污层，用10%、5%和1%的KSCN溶液处理60秒。然后用蒸馏水冲洗样品，并干燥，在扫描电子显微镜下观察。使用添加有3%或0.3%FeCl_3的这些KSCN溶液进行相同的实验。扫描电镜观察显示，治疗后牙本质表面玷污层得到有效清除，牙本质栓形成。在KSCN溶液中加入0.3%FeCl_3预处理效果较好。

Enhancement of the adhesiveness of dental restoratives, such as composite resins, has been clinically essential. A key point in enhancing adhension is how to treat the dentin surface before bonding. We recently attempted to use an inorganic and non-acidic salt solution for pretreatment to dentin. We paid attention to the salting-in effect of rhodanides which promotes swelling of collagen and gelatin. For pretreatment, we used potassium thiocyanate (KSCN) solution. Potassium thiocyanate is frequently called potassium rhodanides which is normally found in human resting saliva at a concentration of 15mg/100ml. This study morphologically evaluted the effect of treatment of dentinal smear layr with rhodanides in combination with cross-linking agents such as ferric chloride. The homogeneous smear layr prepared on the labial surface of bovine tooth by grinding with silicon carbide paper (grit 800) was treated with 10, 5 and 1 % KSCN solutions for 60 seconds. The specimen was then rinsed with distillled water and dried for observation under a scanning electron microscope. The same experiment was performed using these KSCN solution added with 3% or 0.3% FeCl_3. Scanning electron microscopy revealed effective removal of the smear layr on the treated dentin surface and obturation of dentinal plugs. Addition of 0.3% FeCl_3 to KSCN solution was more effective for pretreatment.