[A 5-year retrospective study of computer aided design and computer aided manufacturing ceramic endocrowns in endodontically treated posterior teeth].

抄録

To evaluate the clinical outcomes of computer aided design and computer aided manufacturing (CAD/CAM) ceramic endocrowns in endodontically treated posterior teeth after five years by a retrospective study. Patients who received CAD/CAM ceramic endocrowns after endodontically treatment in Department of Endodontics, School of Stomatology, The Fourth Military Medical University between January 2016 and June 2017 were invited for this clinical study. Clinical performance was evaluated in the aspect of color match, anatomic form,marginal adaptation, restoration integrity and secondary caries. Survival rate of the restorations was calculated by the use of Kaplan-Meier method. Log-rank test was applied as well for the sake of analyzing the effect of tooth position, sex and materials to the survival rate of the restorations. Seventy-four patients, 25 men and 49 women with age of (38.8±10.2) years, participated in this study for a total of 101 CAD/CAM ceramic endocrowns after observation period of (62.8±12.0) months. There were 8 failed cases among 101 restorations, 5 were loss of retention, 2 were ceramic fracture and 1 was secondary caries respectively. In particular, 93% (89/96) restorations got score A on anatomic form and 95% (91/96) restorations got score A on marginal adaptation, while 38% (36/96) restorations showed the good color match compared with the abutment teeth. The estimated cumulative survival rate of CAD/CAM ceramic endocrowns in endodontically treated posterior teeth after 5 years was 93.0% (95%: 87.9%-98.1%). The single-factor Log-rank analysis demonstrated that there was no statistically significant difference in the survival rate of CAD/CAM ceramic endocrowns among men and women, premolars and molars, position in the dental arch, or different materials (χ²<0.01, 0.957; χ²=0.64, 0.422; χ²=0.69, 0.407; χ²=0.88, 0.349). Based on this clinical study, the clinical performance of CAD/CAM ceramic endocrowns in endodontically treated posterior teeth after five years is reliable, which could be a general option to restore nonvital teeth.

通过回顾性研究评价计算机辅助设计与辅助制作（computer aided design and computer aided manufacturing，CAD/CAM）全瓷嵌体冠修复无髓后牙的中长期效果，为临床提供参考。 对2016年1月至2017年6月于第四军医大学口腔医学院牙体牙髓病科就诊并行无髓后牙CAD/CAM全瓷嵌体冠修复的患者进行回访，从颜色、形态、边缘适合性、修复体完整性、继发龋5个方面对未脱落的修复体进行评价。利用Kaplan-Meier生存曲线法计算修复体5年总体生存率。采用Log-rank检验比较各因素对修复体生存率的影响。 共纳入74例患者，其中男性25例，女性49例，年龄（38.8±10.2）岁，共计101件全瓷嵌体冠，随访（62.8±12.0）个月。101件修复体中5件脱落，2件折裂，1件边缘发生继发龋。93%（89/96）的修复体形态评价和95%（91/96）的修复体边缘适合性评价为修复体效果理想，38%（36/96）的修复体颜色与基牙一致。CAD/CAM全瓷嵌体冠修复无髓后牙的5年总体生存率为93.0%（95%：87.9%~98.1%）。单因素分析显示，不同修复体材料、牙位、性别以及颌位对修复体生存率的影响差异均无统计学意义（χ²=0.88，0.349；χ²=0.64，0.422；χ²<0.01，0.957；χ²=0.69，0.407）。 本组CAD/CAM全瓷嵌体冠修复无髓后牙的5年临床效果较好。.