部分烧结氧化锆陶瓷的齿科修复体磨削加工  

Grinding dental prosthesis using partial sintered zirconia ceramics

作　　者：雷小宝[1] 廖文和[1] 张霖[1] 戴宁[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《重庆大学学报（自然科学版）》2011年第8期80-85,共6页Journal of Chongqing University

基　　金：国家科技支撑计划资助项目(2009BAI81B02);教育部博士点基金资助项目(20070287055);南京航空航天大学基本科研业务费专项科研资助项目(NS2010143)

摘　　要：介绍了口腔修复用部分烧结氧化钇稳定四方相氧化锆(Y-TZP)陶瓷的材料性能及切削性能,分析了齿科CAD/CAM修复的技术流程和磨削加工齿科修复体所需具备的一些基础理论与技术装备,给出了一个基于部分烧结氧化锆材料的磨牙冠磨削加工实例,其具体加工分2步:1)采用Ф1.6 mm的柱形标准金刚石磨针,以较大材料去除率的磨削参数(主轴转速40 000 r/min,磨削深度0.2 mm,进给速度300 mm/min)快速加工出磨牙冠的型面,以提高齿科修复的效率。2)因磨牙冠表面形状复杂,故采用Ф0.8 mm的球头锥形磨针,精磨参数采用:主轴转速40 000r/min,磨削深度0.06 mm,进给速度100 mm/min,加工出光洁的磨牙冠表面,形貌检测表明其表面质量高,符合医学齿科修复的要求。The properties and cutting performance of partial sintered Y2O3-stabilized tetragonal zirconia polycrystal（Y-TZP） have been introduced.Then,the CAD/CAM technological chain in the field of dental restoration,the basic grinding theory and technical equipment which are necessary for dental restoration have also been analyzed.Finally,an example for grinding molar crown using partial sintered zirconia has been provided,the specific processing are divided into two steps：1）using standard cylindrical dental diamond burs which is Ф1.6 mm to fabricate the molar crown with grinding parameters（spindle speed 40 000 r/min,grinding depth 0.2 mm,feed rate 300 mm/min）that have high material removal rate;2）using dental diamond burs with ball-end cone wheel,whose diameter is 0.8 mm,with spindle speed 40 000 r/min,grinding depth 0.06 mm,feed rate 100 mm/min,to fine grinding the surface of molar crown.After processing,the surface quality of the molar crown has been tested high and is consistent with the requirements of dental restoration.

关 键 词：四方相氧化锆 部分烧结 牙科陶瓷 牙科修复体 假牙 磨削加工 磨牙冠 

分 类 号：TH-122[机械工程] R782[医药卫生—口腔医学]