ObjectivesTo evaluate the effect of different cement types on the incidence of failure and loss of retention of zirconia and metal‐ceramic single crowns (SCs) cemented on implant abutments.MethodsWe placed 567 implant‐supported SCs in 358 patients and retrospectively evaluated long‐term retention for up to 12.8 years. The frameworks were made from metal alloy (n = 307) or zirconia (n = 260). SCs were cemented with permanent (glass‐ionomer cement; n = 376) or semipermanent cement (zinc oxide non‐eugenol cement; n = 191) on standardized (n = 446) or customized (n = 121) abutments. Kaplan–Meier curves were used to calculate the incidence of decementation. Differences between survival curves were assessed with log‐rank tests. Cox‐regression analysis was performed to evaluate multiple risk factors.ResultsOf the 567 SCs, 22 failed because of technical complications and four because of implant loss. Loss of retention was observed in 50 SCs. Analysis revealed a 7% probability of loss of retention for zirconia and 16% for metal‐ceramic SCs after 10 years (p = .011). After 5 years, loss of retention was higher for standardized abutments than for customized abutments (p = .014). The probability of loss of retention was higher with semipermanent than with permanent cement (p = .001). Cox‐regression analysis revealed semipermanent cement as the only significant risk factor for SC failure (p = .026).ConclusionsIn contrast to semipermanent cement, permanent cement provides acceptable long‐term retention of cemented implant‐supported SCs. These possible positive effects of customized abutments have to be controlled with larger sample sizes.

中文翻译：

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骨水泥种植体支撑氧化锆和金属陶瓷单牙冠的长期保留和存活：一项回顾性研究


目的评价不同骨水泥类型对种植体基台上粘接的氧化锆和金属陶瓷单牙冠 （SCs） 失效和保留损失的影响。方法我们在 358 例患者中放置了 567 个种植体支持的 SCs，并回顾性评估了长达 12.8 年的长期保留。框架由金属合金 （n = 307） 或氧化锆 （n = 260） 制成。在标准化 （n = 446） 或定制 （n = 121） 基台上用永久性 （玻璃离子粘接剂;n = 376） 或半永久性粘接剂 （氧化锌非丁香酚粘接剂;n = 191） 粘接 SCs。使用 Kaplan-Meier 曲线计算脱胶的发生率。用对数秩检验评估生存曲线之间的差异。进行 Cox 回归分析以评估多个危险因素。结果在 567 例 SCs 中，22 例因技术并发症而失败，4 例因植入物丢失而失败。在 50 个 SCs 中观察到保留性丧失。分析显示 10 年后氧化锆保留性丧失的概率为 7%，金属陶瓷 SCs 的保留率为 16% （p = .011）。5 年后，标准化基台的固位损失高于定制基台 （p = .014）。半永久性水泥的保留作用丧失的可能性高于永久性水泥 （p = .001）。Cox 回归分析显示半永久性水泥是 SC 失败的唯一重要危险因素 （p = .026）。结论与半永久性骨水泥相比，永久性骨水泥为骨水泥种植体支撑的 SCs 提供了可接受的长期保留。定制基台的这些可能的积极影响必须通过更大的样本量来控制。