OPTIMIZATION OF SMALL PARTICLE COMPOSITES

小颗粒复合材料的优化

• 批准号: 3221803
• 负责人: TRITALA K VAIDYANATHAN
• 金额: $ 13.22万
• 依托单位: UNIV OF MED/DENT OF NJ-NJ MEDICAL SCHOOL
• 依托单位国家: 美国
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3221803
• 关键词: barium; biomaterial evaluation; biomechanics; composite resins; computer data analysis; mathematics; particle; silicates; strontium; tensile strength

Despite the advances in the field of composite technology and its use in restorative dentistry, there has been no reported systematic study of the role of filler parameters on the properties of composite materials. Among these parameters arefiller material composition, filler volume fraction and average filler particle size. There is a need to understand the role of each of these parameters on the properties of composites under conditions of known particle size distribution and fixed resin matrix composition. This proposal seeks to determine the relationship between variations in filler material composition, average filler particle size and filler volume fractions and the corresponding changes in several properties of composite resins. For this purpose, filler material composition, filler volume fractions and average filler particle size will be varied in a series of experimental composite formulations. A 4x5x5 factorial design will be used for the layout. Four filler compositions to be studied are Barium borosilicate; strontium borosilicate; Borosilicate and quartz. Five different average particles sizes in the size range 1 - 10 um and five different volume fractions in the range 0.4 less than or equal to Vf less than or equal to 0.75 will be used in the study. The following properties will be evaluated: (1) compressive strengths, (2) Diametral tensile strenght, (3) Barcol hardness, (4) Depth of cure of visible light cured formulation, (5) wear, (6) polishability and (7) watersorption. One chemical cure and one light cure resin composition will be used as the matrix phase. Analysis of the data will involve testing of the null hypothesis by multivariate analysis of variance (MANOVA) followed by regression analysis if the null hypotheses are rejected. Microstructural analysis of optimized and other selected formulations will be focused o the presence of voids and particle- matrix interfacial integrity.

尽管复合材料技术领域取得了进展， 在牙科修复中使用，没有报告 系统研究填料参数对性能的影响 复合材料。 在这些参数中， 材料组成、填料体积分数和平均填料 颗粒大小 有必要了解每个人的作用， 这些参数对复合材料性能的条件下 已知粒度分布和固定树脂基质 混合物. 该提案旨在确定 在填料组成、平均填料 颗粒尺寸和填料体积分数以及相应的 复合树脂几种性能的变化。为此 目的、填料材料组成、填料体积分数和 平均填料粒度将在一系列的 实验复合制剂。 4x 5x 5析因设计 将用于布局。 待研究的四种填料组合物 是硼硅酸钡;硼硅酸锶;硼硅酸盐和 石英。 在尺寸范围内有五种不同的平均粒径1 - 10 μ m和五种不同的体积分数，范围为0.4以下 小于或等于Vf小于或等于0.75将用于 study. 将评估以下属性：（1） 抗压强度，（2）径向抗拉强度，（3）巴氏硬度 硬度，（4）可见光固化制剂的固化深度，（5） 磨损，（6）抛光性和（7）吸水性。 一次化学治疗 并且一种光固化树脂组合物将用作基质 相位 数据的分析将涉及空值的测试 多变量方差分析假设 如果零假设被拒绝，则进行回归分析。 优化的和其他选择的微结构分析 配方将集中在空隙和颗粒的存在下， 基质界面完整性。