Baier R E
State University of New York at Buffalo.
Oper Dent. 1992;Suppl 5:1-9.
Understanding interfacial phenomena has been of direct relevance and practical benefit to extending the use of dental adhesives. Both surface physics, which describes properties of the inorganic materials' interfacial zones from their actual phase boundaries toward the bulk phases of the solids, and surface chemistry, which describes phenomena at the solid/biological interface and beyond it into the variable organic environment, have been important. High-energy materials include solids that are very hard, have high melting points, strong intermolecular forces, and basically crystalline structures, such as dental enamel. Low-energy materials, such as dentinal collagen, salivary films, and the organic resins of restorative materials, are softer, lower melting, and have weaker intermolecular forces, poorer crystallinity, and surface energies generally less than 100 ergs/cm. It has been a properly renewed emphasis on wetting of dental surfaces and their modification by primer coats, displacing or mixing with water and adsorbed proteinaceous films, that has promoted the success of many recently developed fourth-generation dentin adhesives. Their improved wettability for biological phases correlates directly with their better infiltration and anchoring of composites.
理解界面现象对于扩展牙科粘合剂的应用具有直接的相关性和实际益处。表面物理学描述了无机材料界面区域从其实际相界到固体本体相的性质，而表面化学描述了固体/生物界面及其之外进入可变有机环境的现象，这两者都很重要。高能材料包括非常硬、熔点高、分子间力强且基本为晶体结构的固体，如牙釉质。低能材料，如牙本质胶原蛋白、唾液膜和修复材料的有机树脂，较软、熔点较低、分子间力较弱、结晶度较差且表面能通常小于100尔格/平方厘米。正是对牙科表面的湿润及其通过底漆涂层进行改性、取代或与水和吸附的蛋白质膜混合的适当重新重视，推动了许多最近开发的第四代牙本质粘合剂的成功。它们对生物相改善的润湿性与其对复合材料更好的渗透和锚固直接相关。
