CAD/CAM氧化锆全瓷冠桥随访4年的临床分析  

Clinical retrospective analysis of All-ceramic crowns and bridges with CAD/CAM Zirconia-base: A Four-year Follow up

作　　者：孙凤[1] 张相皞[1] 晁春良[1] 杜阳[1] 李祎[1] 

机构地区：[1]北京大学口腔医学院门诊部,副主任主任医师北京100034

出　　处：《口腔颌面修复学杂志》2011年第1期22-25,共4页Chinese Journal of Prosthodontics

摘　　要：目的:回顾分析评价CAD/CAM氧化锆全瓷冠桥的修复效果。方法:为267位患者制做CAD/CAM氧化锆全瓷冠或桥681件,随访了205例患者的562件全瓷冠桥,随访时间2-6年。对修复体的崩瓷、全瓷冠的颜色与修复体的边缘密合度进行评价。结果:CAD/CAM氧化锆全瓷冠的崩瓷率3.31%,与修复体部位有明显相关性(P<0.01),不同技术员完成的CAD/C氧化锆全瓷冠的颜色效果有明显不同(P<0.001),不同颜色预备体的修复体后颜色效果没有明显差异(P>0.05),CAD/CAM全瓷冠颜色达到好以上90.8%,CAD/CAM全瓷修复体的边缘密合度达到好的99.2%,长桥边缘密合度欠佳,修复体松动脱落0.35%,随访期间没有发现CAD/CAM全瓷修复体基底冠或桥支架折断。结论:CAD/CAM全瓷冠颜色接近天然牙,特别是预备体变色时是临床首选的美学修复体,CAD/CAM全瓷冠边缘密合度好,整体崩瓷率可接受,但长桥边缘密合度需进一步提高,且磨牙的崩瓷率须进一步研究降低。Objective： To evaluate the clinical performance of CAD/CAM zirconia all-ceramic crowns and fixed partial dentures（FPDs）.Methods： 681 all-ceramic crowns or FPDs were fabricated for 267 patients.562 restorations of 205 patients were clinically followed for 2-6 years.Recalls were made 3 months after cementation.Porcelain fracture performance was compared between restorations in anterior and premolar and molar.Using modified US Public Health Service criteria,judgments were made on marginal integrity and shade and color.Loose or dislodgement,fracture and breakage were reviewed in the annually follow up.Results： Chipping rate is 3.31%,Chipping of restorations in molars were higher than the restorations in premolars and in anterior teeth（χ 2 test,P 0.01）.Different technicians had significant influence（χ 2 test,P 0.001） on color match of crowns,while different color of abutments did not（χ 2 test,P 0.05）.The authors rated 90.8% as good or better in regard to color match,99.2% of the restorations were ranked as good or better on marginal integrity,Loose or dislodgement0.35%,0% for fracture of Zirconia-based.Conclusion： Zirconia-based all-ceramic crowns with CAD/CAM show good marginal integrity and shade compatibility with nature teeth,with a clinically acceptable chipping rate,This material can be used in conventional and esthetic prosthetic dentistry and especially is the preferred esthetic restorations in case of abutment teeth discoloration.Further studies are needed to reduce the chipping in molars and to improve the marginal integrity of long bridges.

关 键 词：氧化锆 全瓷 计算机辅助设计与计算机辅助制作 崩瓷 颜色 

分 类 号：R783[医药卫生—口腔医学]