Survival time of cast post and cores:: A 10-year retrospective study
Survival time of cast post and cores:: A 10-year retrospective study
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DOI：
10.1016/j.jdent.2006.04.004
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发表时间：
2007-01-01
影响因子：
4.4
通讯作者：
Ferger, Paul
中科院分区：
文献类型：
--
作者：
Balkenhol, Markus;Woestmann, Bernd;Ferger, Paul
目的：这项回顾性纵向研究的目的是检查定制铸造桩核的生存时间，并根据一个大型患者群体评估影响失败风险的协变量，时间长达10年。方法：对565例患者的档案进行了分析，这些患者使用标准化技术安装了总共802个定制的铸造桩核。评价中使用了以下参数：桩核的年龄，制造技术（直接，间接），修复类型，位置（上，下颌），牙齿类型（前牙，前磨牙，磨牙），根桩数量，粘接材料，桩核合金和失败原因。使用Kaplan-Meyer分析评估生存概率。使用考克斯回归来评估失败风险并识别可能的协变量。结果：桩核的平均生存时间为7.3年。累积失败率为11.2%。最常见的并发症是桩核固位丧失。高金含量的桩比半贵金属制成的桩失效的风险低。安装修复的类型有显着的影响生存probability.Conclusions：后和核心定制制造使用标准化的制造技术有一个良好的长期预后。失败的最常见原因是保持力丧失。试戴阶段低摩擦桩的耐久性不能通过使用玻璃离子水门汀作为粘接材料来补偿。(C)2006爱思唯尔有限公司保留所有权利。
Objectives: The aim of this retrospective, longitudinal study was to examine the survival time of custom-fabricated, cast post and cores and to evaluate, which covariates influence the risk of failures over a period of up to 10 years based on a large patient collective.Methods: The files of 565 patients, who had been fitted with a total of 802 custom-fabricated, cast post and cores using a standardised technique, were analysed. The following parameters were used in the evaluation: age of the post and cores, fabrication technique (direct, indirect), type of prosthetic restoration, location (upper, lower jaw), type of tooth (anterior, premolar, molar), number of root posts, luting material, post and core alloy and cause of failure. The survival probability was assessed using Kaplan-Meyer analysis. Cox regression was used to assess the risk of failure and identify possible covariates.Results: The average survival time of the post and cores was 7.3 years. The cumulative failure rate was 11.2%. The most common complication was loss of retention of the post and cores. High-gold-content posts had a lower risk of failure than posts made from semiprecious alloy. The type of restoration fitted had a significant influence on the survival probability.Conclusions: Post and cores custom-fabricated using a standardised fabrication technique have a good long-term prognosis. The most common cause of failure is loss of retention. The durability of posts with low friction at the try-in stage cannot be compensated for by using glass ionomer cement as the luting material. (C) 2006 Elsevier Ltd. All rights reserved.