牙根根尖充填材料及其制备方法技术

一种牙根根尖充填材料，包括：天然羟基磷灰石、粒径为0～50?m且平均粒径为2～8?m的磷酸四钙、平均分子量为3万～5万聚丙烯酸、柠檬酸及柠檬酸钠，其质量百分比为35%～44%：35%～44%：7%～9%：1.5%～2.5%：1.5%～2.5%，天然羟基磷灰石、磷酸四钙、聚丙烯酸、柠檬酸及柠檬酸钠经混合、研磨并过200目筛后形成牙根根尖充填材料。制备方法，将天然羟基磷灰石、磷酸四钙、聚丙烯酸、柠檬酸及柠檬酸钠进行混合、研磨并过200目筛后得到牙根根尖充填粉体，隔湿保存，备用；以离子水、PEG400或甘油为液相，将制备的粉体与液相按照4～5：1的质量比调拌、充填模具，制备出牙根根尖充填材料。

Root tip filling material and preparation method thereof

A tooth root canal filling material, including: natural hydroxyapatite, particle size of 0 to 50? M and the average particle size of 2 to 8? Four calcium phosphate, the average molecular weight of M is 30 thousand ~ 50 thousand polyacrylic acid, citric acid and sodium citrate, the mass percentage of 35% ~ 44%:35% ~ 44%:7% ~ 9%:1.5% ~ 2.5%:1.5% ~ 2.5%, hydroxyapatite, calcium, phosphate four polyacrylic acid, citric acid and sodium citrate by mixing, grinding and sieving with 200 mesh sieve after the formation of root apical filling material. Preparation method of natural hydroxyapatite and calcium phosphate four, polyacrylic acid, citric acid and sodium citrate were mixed and milled and 200 mesh is obtained after the root apical filling powder, wet storage, backup; to ionic water, PEG400 or glycerol as the liquid phase, the powder and liquid phase preparation according to the 4 and the mass ratio of 5:1 mixing and filling mold, prepared tooth root canal filling material.

【技术实现步骤摘要】

【技术保护点】
１．一种牙根根尖充填材料，其特征在于，包括：天然羟基磷灰石、粒径为０～５０μｍ且平均粒径为２～８μｍ的磷酸四钙、平均分子量为３万～５万聚丙烯酸、柠檬酸及柠檬酸钠，其质量百分比为３５％～４４％：３５％～４４％：７％～９％：１．５％～２．５％：１．５％～２．５％，所述天然羟基磷灰石、磷酸四钙、聚丙烯酸、柠檬酸及柠檬酸钠经混合、研磨并过２００目筛后形成牙根根尖充填材料。

【技术特征摘要】

【专利技术属性】
技术研发人员：吕晓迎，陈耀忠，
申请(专利权)人：东南大学，
类型：发明
国别省市：84