Lucarotti P S K, Burke F J T
NHS Business Services Authority (Dental Services Division), Eastbourne, East Sussex, BN20 8AD, UK.
J Dent. 2009 Jan;37(1):4-11. doi: 10.1016/j.jdent.2008.03.018. Epub 2008 Jun 11.
This paper describes the database used to assess the survival of indirect restorations and presents general data on survival of these restorations.
Data, based on the complete attendance and treatment history, over the 11 years from 1991 to 2001, of a statistically representative sample of 23,165 General Dental Services' (GDS) patients in England and Wales, all of whom received at least one indirect restoration during the observation period, have been analysed. The patients on the database received a total of 36,397 courses of treatment, and there were 52,481 indirect restorations placed. The method of analysis involved the estimation of the probability that the patient will eventually return, given an interval without attending, by analysing the observed patterns of re-attendance. This estimated probability of re-attendance was then used to modify the standard Kaplan-Meier procedure to produce realistic estimates of the hazard of re-intervention.
Overall, 75% of indirect restorations remained without re-intervention after 5 years, and 61% after 10. Crowns outperformed other types of indirect restoration. Multi-surface metal inlays, by contrast, had a median interval to re-intervention of less than 8 years.
The times to re-intervention for different types of indirect restoration have been successfully estimated and crowns shown to outperform veneers and inlays.
本文描述了用于评估间接修复体存留情况的数据库，并呈现了这些修复体存留情况的一般数据。
分析了基于1991年至2001年这11年间英格兰和威尔士23165名国民牙科服务（GDS）患者的具有统计学代表性样本的完整就诊和治疗史的数据，所有这些患者在观察期内至少接受了一次间接修复。数据库中的患者共接受了36397个疗程的治疗，共放置了52481个间接修复体。分析方法包括通过分析观察到的再次就诊模式来估计患者在未就诊一段时间后最终再次就诊的概率。然后，这个估计的再次就诊概率被用于修改标准的Kaplan-Meier程序，以得出再次干预风险的实际估计值。
总体而言，75%的间接修复体在5年后无需再次干预，10年后这一比例为61%。全冠修复体的表现优于其他类型的间接修复体。相比之下，多面金属嵌体再次干预的中位间隔时间不到8年。
已成功估计出不同类型间接修复体的再次干预时间，并且全冠修复体的表现优于贴面和嵌体。
