Burke F J T, Lucarotti P S K
Primary Dental Care Research Group, University of Birmingham School of Dentistry, St. Chad's Queensway, Birmingham B4 6NN, UK.
J Dent. 2009 Jan;37(1):12-24. doi: 10.1016/j.jdent.2008.03.017. Epub 2008 May 19.
It is the aim of this paper to consider the factors associated with the need for re-intervention on a crown, and the times to re-intervention.
A data set was established consisting of patients, 18 years or older, whose birthdays were included within a set of a randomly selected dates, one of which was chosen in each possible year of birth and whose restoration records contained the placement of one or more indirect restorations on courses of treatment with last date on the claim form after 31st December 1990, and with date of acceptance after September 1990 and before January 2002. For each tooth treated with a crown, the subsequent history of intervention on that tooth was consulted, and the next date of intervention, if any could be found in the extended data set, was obtained. Thus, a data set was created of crowns which have been placed, with their dates of placement and their dates, if any, of re-intervention.
Data for over 80,000 different adult patients were analysed, of whom 46% were male and 54% female. A total of 47,474 crown restoration occasions were obtained from the data over a period of 11 years. Metal crowns were found to have the longest survival-68% at 10 years, and all-porcelain crowns the shortest-48% at 10 years. Factors which were found to influence outcome of crowns included type of crown, age of patient, patient payment exemption status, patient attendance pattern and placement of a root filling in the same course of treatment as a crown.
Full-coverage all-metal crowns have longer survival times before re-intervention than metal-ceramic crowns and all-ceramic crowns. Root fillings are associated with reduced survival time of the crowns examined in this study.
本文旨在探讨与牙冠再次干预需求相关的因素以及再次干预的时间。
建立一个数据集，纳入18岁及以上患者，其生日包含在一组随机选择的日期中，每个可能的出生年份选择一个日期，且其修复记录包含在1990年12月31日之后索赔表上最后日期的治疗过程中一个或多个间接修复体的放置情况，以及1990年9月之后至2002年1月之前的接受日期。对于每颗接受牙冠治疗的牙齿，查阅该牙齿随后的干预历史，并在扩展数据集中找到下一次干预日期（若有）。由此创建了一个已放置牙冠的数据集，包括其放置日期以及再次干预日期（若有）。
分析了超过80,000名不同成年患者的数据，其中46%为男性，54%为女性。在11年期间从数据中获得了总共47,474次牙冠修复情况。发现金属牙冠的存留时间最长——10年时为68%，全瓷牙冠最短——10年时为48%。发现影响牙冠结果的因素包括牙冠类型、患者年龄、患者付费豁免状态、患者就诊模式以及与牙冠在同一治疗过程中进行的根管充填。
全金属覆盖牙冠在再次干预前的存留时间比金属烤瓷牙冠和全瓷牙冠更长。根管充填与本研究中所检查牙冠较短的存留时间相关。
