New adhesive methods of direct metal restorative materials

利用银镜反应进行表面处理：采用新的表面处理方法，促进直接金属修复材料与牙体的结合，而不需要粘结剂。利用甲醛中醛基的还原作用，使硝酸银氨溶液在室温下短时间内在牙齿表面发生银镜反应。由于金属银在牙体表面析出后，与金属汞或镓反应形成液态金属，直接金属修复材料不需要粘接剂就能牢固地固定在牙体上。银汞合金粘结方法的改进：银汞合金（Dispersalloy：DA）和镓合金（Gallium alloy GF：Ga-GF）的抗压剪切粘结强度（CSBS）分别为0.001、0.0001、0 关于我们 测定了市售粘结剂和树脂粘结剂对牛牙本质的粘结强度。特别是，它是检查的方法，牙本质表面处理与酸作为羟基磷灰石增溶剂和次氯酸钠作为胶原增溶剂。牙本质表面由富含胶原向富含羟基磷灰石的状态转变，可显著改善牙本质的粘附性。DA和Ga-GF与Panavia EX（+ Clearfil new bond）对牙本质的CSBS分别为9.7Mpa和30 Mpa。在树脂粘固剂与牙本质的界面处，内应力对树脂粘固剂聚合收缩的松弛作用对Ga-GF的固化膨胀有松弛作用，这是Ga-GF比DA具有粘接优势的主要原因。该底漆含有N，N ′-二甲基丙烯酰胱氨酸作为多官能单体，与二硫和羧基用于表面处理牙齿硬组织（牙釉质和牙本质）和牙科金属合金改善粘接剂和树脂粘固剂的粘附。该底漆有效地提高了Superbond（TBBO引发剂）与贵金属、半贵金属和非贵金属合金的结合强度。然而，底漆不能有效地增强Panavia-21（含BPO-胺的三元引发剂）与牙科金属合金的粘结强度。少

Surface treatment by the use of silver-mirrorreaction : New surface treatment method for promoting the bonding of direct metal restorative materials and tooth substance without cementing agent was applied. The silver-mirror reaction of ammoniacal silver nitrate solution by the use of rducing power of aldehyde group in formaldehyde enabled on the tooth surface at the room temperature and short time. As the resuts of metallic silver, which phates out on the tooth surface, reacts with mercury and/or gallium as a liquid metals in the direct methal restorative materials, direct methal restorative materials were fixed tightly without cementing agent on the tooth substance. Furthermore, there is no construction gap at the interface of direct metal restorative materials and tooth substance through metallic silver on the tooth surface.Improvement of amalgam-bonding method : The compressive shear bond strength (CSBS) of amalgam (Dispersalloy : DA) and gallium alloy (Gallium alloy GF : Ga-GF) wit … More h commercial bonding agents and resin cements to the bovine tooth substance were determined. Especially, it was examined the method of the dentin surface treatment with acid as a hydroxyapatite solubilizer and sodium hypochlorite as a collagen solubilizer. Changing in state from the collagen rich to the hydroxyapatite rich on the dentinal surface took remarkable improvement in adhesion. The CSBS of DA and Ga-GF with Panavia EX (+ Clearfil new bond) to the dentin was 9.7Mpa and 30Mpa, respectively. The relaxation on setting expansion of Ga-GF of the internal stress on the polymerization shrinkage of the resin cement at the interface between resin cement and tooth substance was main reason that could be explained the advantage to Ga-GF to DA in adhesion.New adhesive monomer : The primer containing N,N'-dimethacryloylcystine, as a multifunctional monomer, with disulfide and carboxyl groups was utilized for surface treatment of tooth hard tissues (enamel and dentin) and dental metal alloys improve the adhesion of bonding agents and resin cements. The primer effectively enhanced the bond strength of Superbond (TBBO iniciator) to precious, semi-precious and nonprecious metal alloys. However, the primer ineffectively enhanced the bond strength to Panavia-21 (ternary iniciator with BPO-amine) to dental metal alloys. Less