磷酸三钙生物陶瓷在牙周植骨术中的初步应用

在细胞毒性试验与动物实验基础上,选用国内试制的磷酸三钙陶瓷(TPC)粉末,植人4名牙周病患者的6个骨缺损内。结果术后24周内,植入部牙周组织无明显炎症与材料排异迹象,牙周袋均变浅,附着水平均增加。X线片示植入缺损内皆有新骨形成,骨吸收阴影面积减少均效为41.69%,牙槽骨高度冠向净增加为根长的30.90%(p<0.05)。TPC具有促进牙周病骨缺损修复的潜能,TPC材料来源充足,使用与保存简便,能重复消毒利用,可作为牙周植骨术的骨材。     

玻璃离子体粘固粉

<正> 玻璃离子体粘固粉是近代发展起来的一种新型齿科充填材料。它主要是由富含碱土金属钙离子的铝硅酸盐玻璃所组成,能与有机聚合酸结合固化,与原有齿科材料如银汞合金,磷酸锌粘固粉相比,不仅在使用上方便,而且具有凝结时间快、强度大、有韧性、耐磨、无毒、稳定性良好等特点。因此,受到了口腔     

EXPERIMENTAL STUDY ON APPLICATION OF CALCIUM PHOSPHATE BIOCERAMIC IN PERIODONTAL OSSEOUS DEFECTS

After cytotoxicity test of materials, the application of tricalcium phosphate ceramic (TPC) powder and calcium pyrophosphate ceramic (CPC) powder were evaluated histopathologically in dogs. 2-wall defects (crater) were created surgically in eighteen adult mongrel dogs and ceramic materials were placed into the dejects. On each side of jaw there remained a defect not filling with ceramic and served as control. The dogs were sacrificed at 2nd. 4th, 8th, 16th, 24th and 32nd postoperative week for histological evaluation. Histologically, all materials showed excellent biocompatibility and bone affinity. New bone was found directly deposited on the ceramic particles, and new bone grew more coronally in implant sites than in control sites. The bone affinity of TPC was better than that of CPC. These materials appeared to have osteoconductive effect. At 32nd postoperative week, there was still some remnants of ceramic. According to the results, the authors believe that calcium phosphate ceramic, especially TPC. has the potential to be an alternative to bone graft. The biocompatibility, function and bioresorbability of bioceramic are discussed.     

磷酸钙基生物陶瓷人工骨的动物实验及临床应用（附30例报告）

磷酸钙基生物陶瓷人工骨的动物实验及临床应用（附３０例报告）李洪恩，丛杰，李学举，李伟，赵旭，高成贤，徐茂东，孙亚伟，刘祥清，王次俭，张晓光，王学春，张金池，诸培南，陈宗，戴淞，吕瑞昌磷酸钙基生物陶瓷人工骨（ＴｒｉｃａｌｃｉｕｍＰｈｏｓｐｈａｔｅＢａｓ...     

氧化物掺杂对Ba(Ti,Sn)O_3系列高介材料的改性

采用草酸液相共沉淀法,制得了粒径为0.08～0.14μm的BaTiO_3和BaSnO_3超细、高纯和高活性粉料。并以所制超细粉为基本原料,按Ba(Ti,Sn)O_3固溶体为基体,添加Dy_2O_3、Nb_2O_s和ZnO,利用添加物的移峰、展宽和抑制晶粒长大等效应,得到了一系列在工作温区内介电常数高ε=10370、损耗低tanδ=1.24%、抗电强度高E=2.8kV/mm、温度稳定性好、晶粒尺寸小的材料。并对瓷件的组成、结构与性能的关系作了讨论。