STUDY OF SURFACTANT USE IN RESTORATIVE MATERIALS

界面现象和粘附是两个重要的研究领域 对修复牙科感兴趣。 的长期目标 本申请人的目的是增强 修复材料。 拟议的研究涉及使用 表面活性剂，以提高牙科的界面和粘合性能 水泥 该提案的中心假设是， 添加可增强润湿和界面相互作用， 使粉体在液体中（通过减少团聚）而提高触变性 和牙科粘固剂的微观结构特征。 阴离子效应 和非离子表面活性剂。 表面活性剂将是 作为涂层或与粘合剂的混合物结合到牙科粘固剂中， 水泥粉末或与液体介质的溶液。 的影响 不同浓度的表面活性剂对磷酸锌性能的影响 和聚羧酸盐进行了研究。 待研究的性质 包括稠度、崩解性、溶解性、凝固时间、粘合剂 性能和断口特征。 此外，本发明还提供了一种方法， 具有和不具有表面活性剂的水泥的微观结构特征将 也被研究。 润湿性、分散性、粘附性和耐腐蚀性的增强， 表面活性剂掺入所预期的触变性预期导致 用于临床应用的改进的水泥制剂。

Interfacial phenomena and adhesion are two important areas of research interest in restorative dentistry. The long term objectives of the applicant are the enhancement of the interfacial and adhesive properties of restorative materials. The proposed research deals with the use of surfactants to enhance the interfacial and adhesive properties of dental cements. The central hypothesis of the proposal is that surfactant addition may enhance wetting and interfacial interactions, dispersion of the powder in the liquid (by reducing clustering) and improve thixotropic and microstructural characteristics of dental cements. Effect of anionic and nonionic surfactants will be studied. The surfactants will be incorporated into the dental cements as a coating or admixture with the cement powder or in solution with the liquid medium. The effect of different concentrations of surfactants on the properties of zinc phosphate and polycarboxylate will be studied. The properties to be investigated include consistency, disintegration, solubility, time of setting, adhesive properties, and fractographic characteristics. In addition, microstructural features of the cements with and without surfactants will also be studied. The enhancement of wetting, dispersion, adhesion, and thixotropy expected from surfactant incorporation is expected to lead to improved cement formulations for clinical applications.