Federal University of Pelotas - UFPel, Graduate Program in Dentistry, Pelotas, RS, Brazil.
Federal University of Santa Catarina - UFSC, Post-Graduate Program in Public Health, Florianópolis, SC, Brazil.
Braz Oral Res. 2019 Jul 29;33:e54. doi: 10.1590/1807-3107bor-2019.vol33.0054.
The aim of present study was to estimate the occurrence and associated factors for replacement of amalgam posterior restorations. A representative sample of all 5,914 births from the 1982 in Pelotas birth cohort study was prospectively investigated, and the posterior restorations were assessed at 24 (n = 720) and 31 years of age (n = 539). Individual-level variables, i.e., demographic characteristics, socio-economic factors, oral health conditions and use of dental services, were collected from different waves of the cohort. Tooth-level variables included dental group, estimated time in mouth of each amalgam restoration, and number of restored dental surfaces. Thus, 246 individuals presented 718 amalgam restorations at 24 years of age. After 7 seven years of follow-up, 18.9% of these restorations had been replaced with composite resins. Multilevel Poisson regression models showed that, compared to white individuals, blacks presented a lower risk of replacement of amalgam restorations for composite resins (IRR - 0.39 [0.16-0.95]). Individuals with high educational level at age 31 showed an increased likelihood of replacement of amalgam restorations. Therefore, skin color affects the replacement of amalgam for composite resin in posterior restorations.
本研究旨在评估汞合金后牙修复体的更换发生率及其相关因素。前瞻性调查了来自佩洛塔斯 1982 年出生队列研究的所有 5914 名出生者的代表性样本，分别在 24 岁（n = 720）和 31 岁（n = 539）时评估了后牙修复体。个体水平变量，即人口统计学特征、社会经济因素、口腔健康状况和牙科服务的使用情况，是从队列的不同波次中收集的。牙位水平变量包括牙位组别、每个汞合金修复体在口腔中的估计时间以及修复牙面数量。因此，在 24 岁时，246 名个体有 718 个汞合金修复体。在 7 年的随访后，其中 18.9%的修复体已被复合树脂取代。多水平泊松回归模型显示，与白人相比，黑人接受复合树脂替换汞合金修复体的风险较低（IRR - 0.39 [0.16-0.95]）。31 岁时受教育程度较高的个体，其汞合金修复体更有可能被替换。因此，肤色会影响后牙修复体中汞合金向复合树脂的替换。
