›› 2015, Vol. 35 ›› Issue (9): 783-785.

• 临床研究 • 上一篇    下一篇

CAD/CAM氧化锆全瓷单冠抗折裂随访4年临床分析

郑茜聪,蔡志斌   

  1. 温州医科大学附属口腔医院
  • 收稿日期:2014-05-15 修回日期:2014-06-18 出版日期:2015-09-28 发布日期:2015-09-14
  • 通讯作者: 郑茜聪 E-mail:zxcong@zju.edu.cn

Clinical retrospective analysis of all-ceramic single crown in terms of fracture resistance with CAD/CAM Zirconia-base: a four-year follow-up

  • Received:2014-05-15 Revised:2014-06-18 Online:2015-09-28 Published:2015-09-14

摘要: 目的 回顾分析评价CAD/CAM氧化锆全瓷单冠抗折裂性能。 方法 为189例患者制作CAD/CAM氧化锆全瓷冠284颗,随访到156例患者的226颗全瓷冠,随访2.5~5.5年,对修复体的位置、崩瓷、基底冠折断、修复体松动脱落等情况进行观察。 结果 CAD/CAM全瓷冠1年的折裂率0.9%,2年的折裂率为2.1%,3年的折裂率为3.3%,4年的折裂率为7.1%,观察期间全瓷冠的总折裂率为9.7%。其中2例患者发生基底冠折裂。当对颌分别为天然牙或瓷修复体时,全瓷冠的折裂率有显著性差异(P=0.034)。全瓷冠的折裂后牙明显高于前牙区(P<0.01)。 结论 CAD/CAM氧化锆全瓷冠整体抗折裂性能临床可接受,可作为临床首选的美学修复体。

关键词: 计算机辅助设计/计算机辅助制造, 氧化锆, 全瓷冠 , 抗折裂

Abstract: Objective To evaluate the fracture resistance of CAD/CAM zirconia all-ceramic crowns.Methods 284 all-ceramic crowns were fabricated for 189 patients.226 restorations of 156 patients were clinically followed up for 2.5-5.5 years.The site of crown,fracture or breakage,loose or dislodgement were observed.Results The fracture rate was 0.9% at 1 year after the insertion date,2.1% after two years,3.3% after three years,7.1% after four years.Overall the fracture rate was 9.7% with 226 restorations.Base crown fracture took place in two cases.A statistically significant difference was found for fractures when the opposing dentition of natural teeth and fixed restorations were compared (P=0.034).The fractures were most commonly noted when the opposing dentition was a fixed metal ceramic or other ceramic restorations.Conclusions The fracture resistance of CAD/CAM zirconia all-ceramic crowns was acceptable clinically and it can be a preferred esthetic restoration.

Key words: CAD/CAM, Zirconia-base, all-ceramic, fracture resistance

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