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Development of dental composition resin utilizing low shiriening and low viscous urethane monomears

利用低光泽和低粘度聚氨酯单体开发牙科组合物树脂

基本信息

批准号：
15592074
负责人：
OKAMURA Hiroyuki
金额：
$ 1.6万
依托单位：
The Nipponn Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2006
项目状态：
已结题

项目摘要

To evaluate the application of the new low viscosity monomeric mixture, in which newly developed four-functional urethane-acrylate monomer was used as the base material, its mechanical and physical properties were investigated focusing on lowering the viscosity of monomer, and the following conclusions were obtained comparing with CR produced using bis-GMA monomeric mixture :The new monomeric mixtures showed relatively lower viscosity of 300-600 mPa-s in comparison with the bis-GMA-TEGDMA monomer system of 10,000 mPa-s.1) The mechanical strength of polymers obtained from new monomeric mixtures without fillers was similar to those of bis-GMA based polymers.2) The composites consisting of new monomeric mixtures possessed similar compressive strength to the bis-GMA based composites, although the viscosity of composite pastes even in high filler contents was markedly lower than that of bis-GMA based composites. The compressive strength of the composites increased with the filler content.3) The diametral tensile strength of the composite consisting of a new monomeric mixture was significantly smaller than those of other monomeric systems. Diametral tensile strength increased with the filler content.4) The bending strength of the composites increased with the filler content, although the composite consisted of a new monomeric system showed a different bending strength tendency.5) The setting shrinkage of the composites consisting of new monomeric mixtures were significantly smaller than those of the bis-GMA based composites. The setting shrinkage decreased with an increase of the filler contents.6) The setting shrinkage of the composites considerd of new monomer mixtures wear significantly smaller then that of the. bis-GMA based composite The setting shrinkage increased with the decrease of the filler contents.

为评价以新开发的四官能团氨基甲酸酯-丙烯酸酯单体为基料的新型低粘度单体混合物的应用，以降低单体粘度为重点，对其力学和物理性能进行了研究。并与用双-GMA单体混合物制得的CR进行了比较，得出以下结论：与10,000 mA-1的双-GMA-TEGDMA单体体系相比，新单体混合物的粘度相对较低，为300-600 mpa-S。1)不加填充剂的新单体混合物得到的聚合物的机械强度与双-GMA基聚合物相近。复合材料的压缩强度随填料含量的增加而增加。3)由新型单体混合物组成的复合材料的径向拉伸强度明显小于其他单体体系。径向拉伸强度随填料含量的增加而增加。4)尽管由新单体组成的复合材料呈现不同的弯曲强度趋势，但复合材料的弯曲强度随填料含量的增加而增加。5)由新单体混合物组成的复合材料的凝结收缩明显小于双GMA基复合材料。随着填料含量的增加，复合材料的凝结收缩减小。6)考虑新单体混合物的复合材料的凝结收缩磨损明显小于加入新单体混合物的复合材料。BIS-GMA基复合材料的凝结收缩随填料含量的减少而增大。