计算机辅助设计与制作瓷睿刻长石质玻璃陶瓷全瓷修复体短期临床疗效观察

Short-term clinical performance of all ceramic restorations with CAD/CAM CEREC Blocs

目的探讨计算机辅助设计与制作瓷睿刻长石质玻璃陶瓷全瓷修复体的短期修复效果及临床失败原因。方法对2013年3月-2016年5月于山东省千佛山医院口腔科就诊的142例患者(193件CAD/CAM CEREC Blocs全瓷修复体)进行随访研究,参照改良美国公共卫生署(USPHS)标准进行修复体临床效果的评价,并分析其失败的可能影响因素;通过KaplanMeier生存分析、Log-Rank检验、χ2检验,统计分析全瓷修复体及不同类型、牙位的累积生存率,修复体基牙桩核对修复体生存率的影响。结果在7~39个月的观察期内,2件修复体完全脱落,4件修复体部分崩瓷折断,2件修复体出现裂纹但仍完整;193件CEREC Blocs全瓷修复体累积生存率为93.2%;各修复体类型以及各修复牙位的累积生存率均较高;修复体基牙桩核组与非桩核组的修复体生存率差异无统计学意义(P>0.05)。结论 CEREC AC系统制作的CEREC Blocs全瓷修复体短期内可取得良好的修复效果,修复体基牙桩核对其生存率无显著影响。

Objective To investigate the short-term effect of CAD/CAM CEREC Blocs restorations and its failure modes. Methods Total of 142 cases （193 CEREC Blocs） who had undergone CEREC CAD/CAM Blocs restorations in Qianfoshan Hospital from March 2013 to May 2016 were followed up. According to the modified United States public health service （USPHS）, the clinical performance of the restoration were evaluated and its failure modes were analyzed. The cumulative survival rate of all-ceramic restoration, type and position of fixed prostheses, and the influence of dowel core on survival rate of fixed prostheses were analyzed by Kaplan-Meier survival analysis. Results During the observation period of 7-39 months, two restorations fell off completely, four restorations partially broken, and another two restorations cracked but remained intact. The cumulative survival rate of 193 CEREC Blocs restorations was 93.2%, the survival rates of restorations of different types and different positions showed no significant difference （All P 〉 0.05）, and there was no significant difference in the survival rate between with dowel core group and without dowel core group （P 〉 0.05）. Conclusion CEREC CAD/CAM Blocs may achieve good restoration effect in short term, while there is no significant difference in the survival rate between with dowel core group and without dowel core group.