A New Non-Acidic Pretreatment of Dentinal Smear Layr

增强牙科修复体的粘连性，如复合树脂，在临床上是必不可少的。提高牙本质粘接的关键是在粘接前如何处理牙本质表面。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rhodanides的盐化作用，它促进胶原蛋白和明胶的膨胀。预处理采用硫氰酸钾（KSCN）溶液。硫氰酸钾通常被称为rhodanides钾，通常在人类静息唾液中发现，浓度为15mg/100ml。本研究从形态学上评价罗丹尼酯与氯化铁等交联剂联合治疗牙本质涂片层的效果。分别用10%、5%和1%的KSCN溶液处理60秒后，用800粒碳化硅纸在牛牙唇表面研磨制备均匀的涂抹层。然后用蒸馏水冲洗标本，晾干，在扫描电子显微镜下观察。在KSCN溶液中分别添加3%或0.3% FeCl_3进行同样的实验。扫描电镜显示处理后牙本质表面的涂抹层有效去除，牙本质塞封闭。KSCN溶液中添加0.3% FeCl_3的预处理效果较好。

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.