Department of Prosthodontics, School of Dental Medicine, Justus-Liebig-University, Giessen, Germany.
Int J Prosthodont. 2013 Mar-Apr;26(2):147-50. doi: 10.11607/ijp.2959.
This retrospective clinical study aimed to evaluate the long-term outcomes of clasp-retained, metal-framework removable partial dentures (RPDs) and their clasped teeth, the influencing factors on survival, and the type and number of repairs needed during the observation period.
The study is based on a convenience sample of 52 patients who received 65 RPDs with a total of 207 clasped teeth. The mean observation period was 3.11 ± 0.29 years (maximum: 10 years). Patient gender, prosthesis location (maxilla/mandible), number and distribution (Kennedy class) of abutment teeth, and impact of a continuous follow-up program on a favorable outcome probability were analyzed. Statistical analysis was performed using the Kaplan-Meier method (P < .05) in combination with Cox regression analysis.
During the observation period, 9.2% of the RPDs ceased to function and 5.8% of the abutment teeth were extracted. Mean RPD survival time was 8.07 ± 0.66 years, with a positive outcome probability of 90% after 5 years. Prosthesis location was the only parameter that significantly (P < .05) impacted this probability.
Overall, the high survival probability and low extraction rate of the abutment teeth reported in this study indicate that RPDs designed according to hygienic pronciples are clinically successful.
本回顾性临床研究旨在评估卡环固位金属框架式可摘局部义齿（RPD）及其卡环牙的长期疗效、影响生存的因素，以及在观察期内需要的修复类型和数量。
该研究基于 52 名患者的便利样本，这些患者共接受了 65 个 RPD，其中共有 207 个卡环牙。平均观察期为 3.11 ± 0.29 年（最长 10 年）。分析患者性别、义齿位置（上颌/下颌）、基牙数量和分布（Kennedy 分类）以及连续随访方案对良好结局概率的影响。使用 Kaplan-Meier 方法（P <.05）结合 Cox 回归分析进行统计分析。
在观察期间，9.2%的 RPD 停止功能，5.8%的基牙被拔除。RPD 的平均生存时间为 8.07 ± 0.66 年，5 年后的良好结局概率为 90%。义齿位置是唯一显著影响这一概率的参数（P <.05）。
总体而言，本研究报告的 RPD 高生存率和低基牙拔除率表明，按照卫生原则设计的 RPD 在临床上是成功的。
Zotero 插件