Galafassi Daniel, Scatena Camila, Galo Rodrigo, Curylofo-Zotti Fabiana Almeida, Corona Silmara Aparecida Milori, Borsatto Maria Cristina
Department of Restorative Dentistry, School of Dentistry, Meridional College-IMED, Senador Pinheiro, 304, Cruzeiro, Passo Fundo, Rio Grande do Sul, RS, 99070-220, Brazil.
Department of Pediatric Dentistry, School of Dentistry, Serra Gaucha College-FSG, Os Dezoito do Forte 2366, São Pelegrino, Caxias do Sul, Rio Grande do Sul, RS, 95020-472, Brazil.
Clin Oral Investig. 2017 May;21(4):1231-1241. doi: 10.1007/s00784-016-1897-x. Epub 2016 Jul 4.
The objective of this study was to evaluate longitudinally the composite restorations, performed in cavities prepared by Er:YAG or conventional bur, and dentin re-wetting with water or chlorhexidine.
Twenty individuals with four active caries with cavitation reaching the dentin located on the occlusal surface of molars counterparts are selected. The teeth of each individual were randomly assigned into four groups: (I) Er:YAG laser (260 mJ/4 Hz) re-wetting with chlorhexidine, (II) Er:YAG laser (260 mJ/4 Hz) re-wetting with deionized water, (III) conventional method re-wetting with chlorhexidine, and (IV) conventional method re-wetting with deionized water. The teeth were isolated, prepared cavities, phosphoric acid etching, and re-wetting according to previously assigned method. Restoration was performed employing the Single Bond 2 and Z350XT resin. Clinical follow-up was held after the polishing of the restoration (baseline) and 6 and 12 months of the making of the restoration using the modified USPHS criteria. The restorations were qualitatively analyzed by means of photographs. In the evaluation period, replicas of the restorations were analyzed by SEM. Data were analyzed by statistics using chi-square test (p < 0.05).
After 12 months of clinical evaluation, groups prepared with laser and re-wetting with chlorhexidine and water showed the lowest marginal staining value. There was no statistical difference between the groups for other factors. SEM analysis revealed that a non-expressive amount of restorations showed gaps and irregularities of tooth-restoration interface after 6 and 12 months compared to the baseline.
The restorations performed in laser-prepared cavities, regardless of the re-wetting, presented the best clinical performance over the evaluated period.
Laser-prepared teeth, regardless of re-wetting, showed greater resistance to marginal discoloration.
本研究的目的是纵向评估用铒激光或传统车针制备窝洞后进行的复合树脂修复，以及用水或氯己定对牙本质进行再湿润的效果。
选取20名个体，其磨牙咬合面有4个已发生牙本质龋洞的活跃龋损。将每个个体的牙齿随机分为四组：（I）铒激光（260 mJ/4 Hz）+氯己定再湿润，（II）铒激光（260 mJ/4 Hz）+去离子水再湿润，（III）传统方法+氯己定再湿润，（IV）传统方法+去离子水再湿润。对牙齿进行隔离、制备窝洞、磷酸酸蚀，并根据预先指定的方法进行再湿润。使用Single Bond 2和Z350XT树脂进行修复。在修复体抛光后（基线）以及修复体制作后6个月和12个月，按照改良的美国公共卫生署（USPHS）标准进行临床随访。通过照片对修复体进行定性分析。在评估期间，通过扫描电子显微镜（SEM）分析修复体的复制品。使用卡方检验进行统计学分析（p < 0.05）。
经过12个月的临床评估，用激光制备并分别用氯己定和水再湿润的组边缘染色值最低。其他因素在各组之间无统计学差异。SEM分析显示，与基线相比，6个月和12个月后，有少量修复体在牙齿-修复体界面出现间隙和不规则。
在评估期间，无论再湿润情况如何，用激光制备窝洞后进行的修复体临床性能最佳。
无论再湿润情况如何，用激光制备的牙齿对边缘变色具有更强的抵抗力。
