Monaco Carlo, Caldari Mauro, Scotti Roberto
Int J Prosthodont. 2015 May-Jun;28(3):239-42. doi: 10.11607/ijp.4038.
The aim of this retrospective cohort study was to evaluate the clinical performance of zirconia-based implant-supported single crowns and fixed dental prostheses (FDPs) made by 15 members of the Italian Academy of Prosthetic Dentistry (AIOP) over a time period of up to 5 years.
One hundred thirty-one patients were treated with a total of 210 zirconia-based single crowns and FDPs on implants in anterior and posterior regions. A cohort group with parafunctional habits was compared with patients without parafunctional habits according to the esthetic, functional, and biologic United States Public Health Service criteria modified by the FDI World Dental Federation.
The estimated cumulative survival (ECS) and standard error (SE) of all restorations on implants was 91.95% ± 1.39%, and the estimated cumulative success (ECSs) and SE was 88.37% ± 1.72%. The ECS of single crowns and FDPs was 91.25% ± 3.69% and 95.23% ± 2.28%, respectively, and the estimated cumulative success rates were 88.84% ± 2.05% and 87.96% ± 3.16%, respectively. Mechanical failures, including four zirconia core fractures, three hairline cracks, four chippings, and five delaminations of the ceramic veneering material, were recorded during a 1- to 5-year observation period. The odds ratio of 3.39 (95% confidence interval: 1.18 to 9.73) showed a moderate association between parafunction and failure.
Zirconiabased implant-supported restorations showed encouraging clinical results over a period of up to 5 years, but more clinical data are needed before these restorations can be considered a viable treatment alternative. Mechanical failures were primarily observed in patients with parafunctions.
这项回顾性队列研究的目的是评估由意大利口腔修复学会（AIOP）的15名成员制作的氧化锆基种植体支持的单冠和固定义齿（FDP）在长达5年的时间段内的临床性能。
131例患者在前牙区和后牙区的种植体上共接受了210个氧化锆基单冠和FDP修复。根据由国际牙科联盟（FDI）修改的美国公共卫生服务部的美学、功能和生物学标准，将有异常功能习惯的队列组与无异常功能习惯的患者进行比较。
种植体上所有修复体的估计累积生存率（ECS）和标准误差（SE）为91.95%±1.39%，估计累积成功率（ECSs）和SE为88.37%±1.72%。单冠和FDP的ECS分别为91.25%±3.69%和95.23%±2.28%，估计累积成功率分别为88.84%±2.05%和87.96%±3.16%。在1至5年的观察期内记录到机械故障，包括4例氧化锆核断裂、3例细微裂纹、4例崩瓷和5例陶瓷贴面材料分层。3.39的优势比（95%置信区间：1.18至9.73）表明异常功能与修复体失败之间存在中度关联。
氧化锆基种植体支持的修复体在长达5年的时间里显示出令人鼓舞的临床结果，但在这些修复体被视为一种可行的治疗选择之前，还需要更多的临床数据。机械故障主要在有异常功能的患者中观察到。
