摘要
目的评价运用牙科计算机辅助设计与制作（CAD—CAM）氧化锆全瓷固定冠桥修复体的临床应用效果。方法选择2010年1月至5月接受氧化锆全瓷冠桥修复的患者113例，共计167件修复体，通过计算机印模采集系统获取工作模型及对猞牙咬合记录的三维数据，将两者虚拟拼合后，采用inLab V3．85软件的Reduced程序设计并制作氧化锆内冠支架，经二次烧结结晶后表面堆塑饰瓷（Vita-VM9）完成最终修复体。于修复后即刻、6和12个月按照改良的美国公共卫生署评价标准评价修复体临床使用效果。结果经过6—12个月的短期随访观察，氧化锆全瓷冠桥修复体总体成功率为96．1％（147／153），临床检查边缘密合，未出现崩瓷或折裂现象，所有患者对修复体的外形与颜色满意。结论运用改良方法设计与制作的氧化锆全瓷冠桥内冠厚度合理，为饰瓷预留空间适中，可提高氧化锆全瓷修复体质量。
Objective To evaluate the clinical behavior of zirconia restorations fabricated by computer aided design and computer aided manufacture （ CAD-CAM ） system. Methods One hundred and thirteen patients with 167 unit restorations were enrolled in the study. First, the shape of abutment teeth and occlusion record was captured and digitized by Sirona inEos system. Then, each individually shaped framework was created using the cut-back program of inLab V3.85 software to leave a uniform thickness to the ceramic veneer. All restorations were veneered with Vita-VM9 and evaluated at baseline, 6, 12 months after delivery using the modified U S Public Health Service Criteria （USPHS）. Results During the 6 to 12 months＇ follow-up visit, the success rate of the restorations was 96. 1% （147/153）, none was replaced due to framework fracture or unrestorable delamination of the ceramic veneer, and all patients were satisfied with the shape and color of their restorations. Conclusions Based on the results of this study, it can be concluded that zirconia frameworks demonstrated sufficient stability for all-ceramic fixed partial denture using individual-design processing technology.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2011年第12期751-754,共4页
Chinese Journal of Stomatology
关键词
计算机辅助设计
氧化锆
全瓷修复体
Computer-aided design
Zirconia
All-ceramic restorations
