STUDY OF SURFACTANT USE IN RESTORATIVE MATERIALS

界面现象和粘着是研究的两个重要领域 对修复性牙科的兴趣。该计划的长远目标 申请者是增强了界面和粘接性能 修复材料。这项拟议的研究涉及使用 表面活性剂增强牙体界面和粘接性能的研究 水泥。该提案的中心假设是表面活性剂 添加可能会增强润湿和界面相互作用，分散 液体中的粉末(通过减少聚集)和改善触变性 牙科粘固剂的微观结构特征。阴离子效应 以及非离子表面活性剂的研究。表面活性剂将是 作为涂层或混合物加入到牙科粘固剂中 水泥粉或在溶液中加入液体介质。的影响 不同浓度表面活性剂对磷酸锌性能的影响 和多羧酸盐将被研究。待调查的属性 包括稠度、崩解度、溶解度、凝结时间、粘合力 特性和断口特征。此外, 添加表面活性剂前后水泥的微观结构特征 也有待研究。提高润湿性、分散性、附着力和 表面活性剂掺入预期的触变性预计将导致 用于临床应用的改进的水泥配方。

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.