Department of Endodontics, Malmö University, Malmö, Sweden.
Department of Endodontology, University of Gothenburg, Gothenburg, Sweden.
J Dent Res. 2021 Jun;100(6):608-614. doi: 10.1177/0022034520982962. Epub 2021 Jan 5.
Essentially, root fillings are performed to preserve natural teeth. Over time, however, some root-filled teeth will inevitably be extracted. The aim of this historical prospective cohort study in the adult Swedish population was to identify factors associated with extractions within 5 y of registration of a root filling. The cohort consisted of all those whose root fillings had been reported to the tax-funded Swedish Social Insurance Agency (SSIA) in 2009. Demographic data on the individuals registered with a root filling (sex, age, country of birth, disposable income, educational level, and marital status) were received from Statistics Sweden or the SSIA. Dental care setting, tooth type, and any registration of subsequent restorations within 6 mo were received from the SSIA. Multivariable regression analysis was used, and < 0.05 was considered statistically significant. In total, 216,764 individuals had been registered with at least 1 root filling. Individuals ( = 824) without complete data were excluded from the analyses. After 5 y, 9.3% of the root-filled teeth had been registered as extracted. Logistic regression analysis found significant associations for all variables except country of birth, disposable income, and educational level. The highest odds ratios for extractions were associated with the type of restoration: teeth with no registration of any restoration and teeth with a direct restoration combined with a post were 3 times more likely to undergo extraction than teeth restored with an indirect restoration combined with a post and core. Overall, high odds ratios for extractions were associated with any type of composite restoration, including composite fillings and crowns combined with or without any post. In summary, after root filling in the Swedish adult population, several individual- and tooth-specific variables were associated with extraction. The reasons for the extractions remain to be studied further.
本质上，根管填充是为了保存天然牙齿。然而，随着时间的推移，一些根管填充的牙齿不可避免地需要被拔除。本项在瑞典成年人群中进行的回顾性队列研究旨在确定与根管填充后 5 年内拔牙相关的因素。该队列包括所有于 2009 年向瑞典税收资助的社会保险局（SSIA）报告根管填充的患者。个体的人口统计学数据（性别、年龄、出生地、可支配收入、教育程度和婚姻状况）由瑞典统计局或 SSIA 提供。牙体治疗场所、牙齿类型和 6 个月内任何后续修复的记录均来自 SSIA。采用多变量回归分析， < 0.05 被认为具有统计学意义。总共登记了 216764 名至少有 1 次根管填充的患者。由于缺乏完整数据，将 824 名患者排除在分析之外。5 年后，9.3%的根管填充牙被登记为已拔除。逻辑回归分析发现，除了出生地、可支配收入和教育程度外，所有变量均与拔牙显著相关。与修复类型相关的拔牙比值比最高：未进行任何修复的牙齿和直接修复联合桩的牙齿比间接修复联合桩和核的牙齿更有可能被拔除。总的来说，任何类型的复合修复（包括复合填充和冠）与高拔牙比值比相关，包括单独使用或联合使用桩。综上所述，在瑞典成年人中进行根管填充后，几个个体和牙齿特异性变量与拔牙相关。拔牙的原因仍需进一步研究。
