Tartaglia Gianluca M, Sidoti Ernesto, Sforza Chiarella
Functional Anatomy Research Center (FARC), Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Scienze Biomediche per la Salute, Facoltà di Medicina e Chirurgia, Università degli Studi di Milano, via Mangiagalli 31, 20133, Milan, Italy.
Clin Oral Investig. 2015 Jun;19(5):1137-45. doi: 10.1007/s00784-014-1330-2. Epub 2014 Oct 12.
Zirconia-based prostheses are used for esthetic crown and fixed restorations, but follow-ups are still limited. The authors evaluated the 7-year clinical results of 303 zirconia core restorations, performed in a general dental private practice.
Clinical events (fracture and loss of retention, gingivitis, tenderness, excess cement, and temporary pain) were recorded in 303 zirconia core restorations positioned in 88 patients. Kaplan-Meier survival probability estimates were computed for failures (needed the replacement or removal of the prosthesis) and complications (resolved without replacing the prosthesis).
One hundred and fifty single crowns (130 tooth-supported, 20 implant-supported) and 153 multiple units up to 6 elements (49 tooth-supported, 104 implant-supported) were followed-up for 7 years in 88 patients (40 men, 48 women), aged 35-89 years (mean 57). During the follow-up period, there were no complications for 287 (95 %) of the restorations. Sixteen restorations/abutment teeth (5 %) had some complication: extraction of abutment tooth (7, 2 %); caries (2, 1 %), porcelain veneer fracture (3, 1 %), loss of retention (4, 1 %). Nine (3 %) restorations were recorded as failures. The overall 7-year survival probability estimate for failures was 0.966 (95 % confidence limits, 0.932 and 0.983), for complications was 0.976 (95 % confidence limits 0.947 and 0.989), with a cumulative survival rate of 94.7 %.
Within the analyzed follow-up, zirconia core restorations appear a good clinical solution, with favorable functional properties.
All ceramic restorations can be successfully used for both single-and multiple-unit prostheses, either teeth or implants supported.
氧化锆基修复体用于美观牙冠和固定修复，但随访研究仍然有限。作者评估了在一家普通牙科私人诊所进行的303例氧化锆核修复体的7年临床结果。
记录了88例患者的303例氧化锆核修复体的临床事件（折断、固位丧失、牙龈炎、压痛、多余粘固剂和暂时性疼痛）。计算了失败（需要更换或移除修复体）和并发症（无需更换修复体即可解决）的Kaplan-Meier生存概率估计值。
对88例年龄在35 - 89岁（平均57岁）的患者（40名男性，48名女性）的150个单冠（130个牙支持，20个种植体支持）和153个多达6个单元的多单位修复体（49个牙支持，104个种植体支持）进行了7年的随访。在随访期间，287个（95%）修复体无并发症。16个修复体/基牙（5%）出现了一些并发症：基牙拔除（7个，2%）；龋齿（2个，1%），烤瓷贴面折断（3个，1%），固位丧失（4个，1%）。9个（3%）修复体被记录为失败。失败的总体7年生存概率估计值为0.966（95%置信区间，0.932和0.983），并发症的为0.976（95%置信区间0.947和0.989），累积生存率为94.7%。
在分析的随访期内，氧化锆核修复体似乎是一种良好的临床解决方案，具有良好的功能特性。
全瓷修复体可成功用于单单位和多单位修复体，无论是牙支持还是种植体支持。
