RF型氧化锆陶瓷可切削性能的研究  

Analysis of machinability of the RF zirconia ceramics

作　　者：秘婷婷[1] 武天逾 何惠明[1] 梁猛猛[1] 

机构地区：[1]第四军医大学口腔医学院,陕西西安710032 [2]深圳金悠然科技有限公司,广东深圳518129

出　　处：《牙体牙髓牙周病学杂志》2011年第2期98-100,113,共4页Chinese Journal of Conservative Dentistry

基　　金：深圳龙岗区科技计划项目(CX2008001);陕西省社发攻关项目(2009K01-87)

摘　　要：目的:以IPS e.max ZirCAD(ZirCAD)、VITA In-Cream YZ for inlab(YZ)陶瓷可切削性能做为对比,分析RF型氧化锆陶瓷(RF)的可切削性能。方法:测量RF、ZirCAD、YZ 3种陶瓷的维氏硬度和断裂韧性,计算出3种陶瓷的可加工指数;另将3种陶瓷放置于Sirona inLab MC XL型CAD/CAM机上加工同一左侧下颌第一前磨牙基底冠,测量切削时间;用体视显微镜观察冠表面情况。结果:RF、ZirCAD、YZ 3种陶瓷的可加工指数(μm1/2)分别为2.88±0.02、2.87±0.03、2.90±0.02;切削时间分别为512.6±1.82、517.2±1.92、510.2±1.92。其中RF与YZ陶瓷的可加工指数和切削时间无显著差异(P>0.05),而ZirCAD与其余2种陶瓷有显著差异(P<0.05)。3种陶瓷所切削的冠外形完整,边缘光滑,无崩口、无裂纹。结论:RF型可切削氧化锆陶瓷具有较良好的可切削性能,可以满足牙科CAD/CAM加工的需要。AIM： To investigate the machinability of the RF zirconia ceramics（RF） by comparing it with IPS e.max ZirCAD（ZirCAD） and VITA In-Cream YZ for inlab（YZ） ceramics.METHODS： Specimens of RF,ZirCAD and YZ were prepared.A Vickers Hardness Tester was used for calculation of the surface oughness and fracture toughness,and then Milling index（M） was calculated.The frameworks of mandibular first premolar were obtained by RF,ZirCAD and YZ blocks with Sinona inlab MC XL CAD/CAM system.The miling time was recoded.All the frameworks were observed with an optical microscope.RESULTS： The Milling index（M） and milling time were： RF（2.88±0.02）μm1/2,（512.6±1.82）s;ZirCAD（2.82±0.02）μm1/2,（517.2±1.92）s;YZ（2.90±0.02）μm1/2,（510.2±1.92）s.The Milling index（M） and milling time results showed that there were no significant statistical difference between RF and YZ ceramics,but ZirCAD showed significant difference with the other two groups（P0.05）.All the frameworks had complete configuration without cracks.CONCLUSION： The RF zirconia ceramics has a satisfactory machinability,and the material can meet the need of CAD/CAM system in dentistry.

关 键 词：陶瓷 氧化锆 可切削性 

分 类 号：R783.1[医药卫生—口腔医学]