Mount G J
Am J Dent. 1990 Apr;3(2):79-84.
The polyacrylic cements were first introduced to dentistry in the middle 1960's when Smith showed the value of the polyacids, in developing adhesion to enamel and dentine. Within 10 years, Wilson had advanced the concept by changing the powder from a zinc oxide to glass and at the same time varying the poly-acid used. Both cements depend on the development of complex polyacrylate chains which can be linked with metal ions and in turn can form dynamic linkages with both enamel and dentine. The original polycarboxylate cement has many desirable characteristics and is still a useful cement for luting crowns and bridges and for lining cavities. However it is no longer widely used because it has been somewhat overshadowed by the glass ionomer cements which are even more versatile and have superior physical properties. By varying the type of glass, the fluoride content of the glass and the powder/liquid ratio as well as adding inclusions of other metals such as silver they can fulfil a variety of roles in restorative dentistry. However, as with any restorative material, it is essential that the operator fully understand the requirements for successful placement. The basic rules are reviewed for each of the types currently available and the steps for clinical success are detailed.
聚丙烯酸类水门汀于20世纪60年代中期首次被引入牙科领域，当时史密斯展示了多元酸在形成与牙釉质和牙本质的黏附方面的价值。在10年之内，威尔逊推进了这一概念，他将粉剂从氧化锌改为玻璃，同时改变了所使用的多元酸。这两种水门汀都依赖于复杂聚丙烯酸酯链的形成，这些链可以与金属离子相连，进而与牙釉质和牙本质形成动态连接。最初的聚羧酸锌水门汀有许多理想的特性，仍然是用于黏固冠和桥以及衬洞的有用水门汀。然而，它不再被广泛使用，因为它在某种程度上已被玻璃离子水门汀所掩盖，玻璃离子水门汀用途更广且具有更优越的物理性能。通过改变玻璃的类型、玻璃的氟含量、粉液比以及添加其他金属（如银）的夹杂物，它们可以在修复牙科中发挥多种作用。然而，与任何修复材料一样，操作人员充分了解成功应用的要求至关重要。针对目前可用的每种类型，回顾了基本规则，并详细介绍了临床成功的步骤。
