University of Bern, Bern, Switzerland.
Int J Prosthodont. 2012 Jul-Aug;25(4):360-7.
The aims of this study were to reexamine patients who had received fixed dental prostheses (FDPs) more than 10 years prior, list the frequencies of observed technical and biologic failures and complications, and calculate the estimated failure and complication rates at 10 and 15 years.
Fifty-six of 195 patients who were treated by undergraduate students during their state board examinations in fixed prosthodontics between 1990 and 1999 at the School of Dental Medicine, University of Bern, Bern, Switzerland, were recalled successfully.
At reexamination, it was determined that 56 patients with a mean age of 62 years (range: 41 to 85 years) had received 95 metal-ceramic FDPs supported by 202 abutment teeth. Prostheses had been in function for 7 to 19 years (mean: 14 years). The FDPs demonstrated a high estimated survival rate of 90.4% after 10 years and 80.5% after 15 years, although 17 of the 202 abutment teeth had been lost. The probability to remain free from any complication/failure was 79.7% at 10 years and 34.6% at 15 years. The risk of FDPs being affected by a biologic complication or failure after 10 years was 14.9%; the risk was 5.34% for a technical complication or failure. After 15 years, the risks of a biologic or technical complication or failure were 45.7% and 19.7%, respectively.
The survival rates of FDPs decreased gradually with time. Freedom from complications and failures was drastically decreased for FDPs that had been in function for longer than 10 years.
本研究旨在重新检查 10 年前接受固定义齿修复（FDPs）的患者，列出观察到的技术和生物学失败及并发症的频率，并计算 10 年和 15 年时的预计失败和并发症发生率。
1990 年至 1999 年期间，瑞士伯尔尼大学牙医学院的本科生在州立考试中治疗的 195 名患者中有 56 名成功召回。
在复查时，确定 56 名平均年龄为 62 岁（范围：41 至 85 岁）的患者接受了 95 个金属-陶瓷 FDPs 的修复，由 202 个基牙支撑。修复体的使用时间为 7 至 19 年（平均：14 年）。尽管 202 个基牙中有 17 个缺失，但 FDPs 在 10 年后的预计生存率为 90.4%，在 15 年后为 80.5%。在 10 年时，无任何并发症/失败的概率为 79.7%，在 15 年时为 34.6%。FDPs 在 10 年后发生生物学并发症或失败的风险为 14.9%；技术并发症或失败的风险为 5.34%。15 年后，生物学或技术并发症或失败的风险分别为 45.7%和 19.7%。
FDPs 的生存率随时间逐渐下降。对于使用时间超过 10 年的 FDPs，并发症和失败的风险急剧降低。
