Int J Prosthodont. 2021 November/December;34(6):703–711. doi: 10.11607/ijp.7090. Epub 2021 Feb 23.
PURPOSE: To compare in a randomized controlled trial the 5-year clinical outcomes of (1) 3-unit fiber-reinforced resin-bonded fixed dental prostheses (RBFDPs) to 3-unit metal-ceramic RBFDPs; and (2) 3-unit fiber-reinforced RBFDPs to 2-unit cantilevered metal-ceramic RBFDPs. MATERIALS AND METHODS: A consecutive sample of 50 young adult patients with tooth agenesis or trauma in the anterior region was included. The recruitment period was from 2005 to 2009, during which a total of 62 RBFDPs were inserted. In group A, 27 participants were randomly treated with 18 metal-ceramic 3-unit RBFDPs and 15 3-unit fiber-reinforced RBFDPs. In group B, 23 participants were randomly treated with 16 metal-ceramic 2-unit RBFDPs and 13 3-unit fiber-reinforced RBFDPs. All patients were followed up at baseline registration and at 1, 3, and 5 years. The primary outcome parameter was survival rate of the RBFDPs, and the secondary outcome parameters were periodontal and technical/esthetic outcomes and patient-reported evaluation of the RBFDPs. RESULTS: Seven patients dropped out of the study during the 5-year observation period. In group A, the fiber-reinforced RBFDPs had a cumulative survival rate of 23% after 5 years, which was significantly less than for the 3-unit metal-ceramic RBFDPs. In group B, the cumulative 5-year survival rate was 36% for the fiber-reinforced RBFDPs and 91% for the 2-unit cantilevered metal-ceramic RBFDPs. CONCLUSION: The 3- and 2-unit metal-ceramic RBFDPs had a significantly higher 5-year survival rate than the 3-unit fiber-reinforced RBFDPs. The accessibility for oral hygiene practice was better with 2-unit compared to 3-unit RBFDPs, and the degree of gingivitis was lower. The esthetic outcome was better for the RBFDPs with ceramic pontics than the composite ones.
目的：在一项随机对照试验中比较（1）3 单位纤维增强树脂粘结固定义齿（RBFDP）与 3 单位金属陶瓷 RBFDP 的 5 年临床结果；（2）3 单位纤维增强 RBFDP 与 2 单位悬臂金属陶瓷 RBFDP 的 5 年临床结果。
材料和方法：纳入了 50 名因先天缺失或外伤导致前牙缺失的年轻成年患者。招募期为 2005 年至 2009 年，在此期间共植入 62 个 RBFDP。在 A 组中，随机治疗 27 名参与者，其中 18 名接受金属陶瓷 3 单位 RBFDP 治疗，15 名接受 3 单位纤维增强 RBFDP 治疗。在 B 组中，随机治疗 23 名参与者，其中 16 名接受金属陶瓷 2 单位 RBFDP 治疗，13 名接受 3 单位纤维增强 RBFDP 治疗。所有患者在基线登记时以及 1、3 和 5 年时进行随访。主要结局参数是 RBFDP 的生存率，次要结局参数是牙周和技术/美观结果以及患者对 RBFDP 的评价。
结果：在 5 年观察期内，有 7 名患者退出研究。在 A 组中，纤维增强 RBFDP 在 5 年后的累积生存率为 23%，显著低于 3 单位金属陶瓷 RBFDP。在 B 组中，纤维增强 RBFDP 的 5 年累积生存率为 36%，2 单位悬臂金属陶瓷 RBFDP 的生存率为 91%。
结论：3 单位和 2 单位金属陶瓷 RBFDP 的 5 年生存率明显高于 3 单位纤维增强 RBFDP。与 3 单位 RBFDP 相比，2 单位 RBFDP 的口腔卫生维护更方便，牙龈炎程度更低。陶瓷桥体的 RBFDP 美观效果优于复合材料桥体。
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