Adjunct Professor, Department of Dental Medicine, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain.
Postgraduate student, Department of Dental Medicine, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain.
J Prosthet Dent. 2022 Jun;127(6):846-851. doi: 10.1016/j.prosdent.2020.09.046. Epub 2021 Jan 23.
Anterior veneered zirconia partial fixed dental prostheses (FDPs) have substituted for metal-ceramic to improve esthetics and biocompatibility. However, the material is susceptible to aging or hydrothermal degradation and to chipping of the feldspathic veneer. Whether these susceptibilities limit the clinical performance of anterior veneered zirconia FPDs is unclear.
The purpose of this prospective clinical study was to analyze the mechanical and biologic behavior of zirconia partial FDPs in the anterior region over a 12-year follow-up period.
Twenty-seven 3- to 6-unit FDPs fabricated from zirconia veneered with feldspathic porcelain were placed in the anterior region and examined clinically at 1 month, 6 months, and then annually for 12 years, recording mechanical and biologic outcomes. Raw complication rates and time-to-event Kaplan-Meier analysis was conducted and compared as per the partial fixed dental prosthesis type.
Five FDPs had biologic complications (3 with secondary caries, 1 with periapical pathology, 1 with periodontal disease) and 9 had mechanical complications (7 with chipping and 2 with decementation). Chipping was the most prevalent complication and increasingly found with longer-span fixed partial prostheses (P=.007). Five FDPs had to be replaced because of complete failure, the most frequent cause of failure being secondary caries (P=.003). The mean survival rate (no failures) was 11 years 4 months (95% confidence interval, 10.3-12.7).
Zirconia FDPs had an 81.5% survival rate over 12 years. A higher incidence of complications took place during the first 3 years, the most common being chipping.
为改善美观和生物相容性，前牙贴面氧化锆局部固定义齿（FDP）已替代金属-陶瓷。然而，该材料易发生老化或热-水降解，以及长石质贴面剥落。这些易感性是否限制了前牙贴面氧化锆 FDP 的临床性能尚不清楚。
本前瞻性临床研究的目的是分析在前牙区域使用氧化锆制作的局部 FDP 在 12 年随访期间的机械和生物学行为。
在前牙区域共放置 27 个由长石质瓷贴面氧化锆制作的 3-6 单位 FDP，在 1 个月、6 个月和随后每年进行临床检查，记录机械和生物学结果。进行原始并发症发生率和生存时间 Kaplan-Meier 分析，并按局部固定义齿类型进行比较。
5 个 FDP 出现生物学并发症（3 个继发龋，1 个根尖周病变，1 个牙周病），9 个出现机械并发症（7 个出现崩瓷，2 个出现脱粘）。崩瓷是最常见的并发症，且随着固定桥跨度的增加发生率也随之增加（P=.007）。5 个 FDP 因完全失败而需要更换，失败的最常见原因是继发龋（P=.003）。平均无失败生存率为 11 年 4 个月（95%置信区间，10.3-12.7）。
氧化锆 FDP 在 12 年内的生存率为 81.5%。在前 3 年发生并发症的几率更高，最常见的是崩瓷。
