Arweiler N B, Auschill T M, Reich E
Department of Periodontology and Conservative Dentistry, University of Saarland, 66421 Homburg, Germany.
J Adhes Dent. 2000 Winter;2(4):289-95.
The aim of this laboratory study was to evaluate the marginal sealing ability of four glass-ionomer cements in cervical restorations (Class V) using dye penetration. Two conventional (C-GIC) and two resin-modified (RM-GIC) cements were used either with or without dentin conditioning with polyacrylic acid.
96 cervical cavities of standardized size were prepared in vitro in the vestibular and lingual portions at the cementoenamel level of 48 premolars. The coronal margins were prepared in enamel, the apical margins were localized in dentin. The 96 cavities were randomly divided into 4 groups of n = 24 each. The cavities of each group were filled with one of the test materials, and only half of the cavities received a dentin conditioning for 20 s with polyacrylic acids before filling. The fillings were finished with a set of abrasive disks 24 h after setting. The restored teeth were stored in saline for 4 weeks and subjected to dye penetration. The depth of dye penetration along the coronal and apical margin was measured on 4 longitudinal sections of each tooth with a semi-automatic image analysis system at 40x magnification.
Mean depth of dye penetration ranged from 0 (ChemFil superior without conditioner) to 0.13 mm (ChemFil superior with conditioner) at enamel sites, and from 0.02 (Fuji II LC with conditioner) to 0.74 mm (ChemFil superior with and without conditioner) at dentin sites.
The conditioning of the cavities before filling improved the marginal adaptation significantly only in the Ketac-Fil group. Conventional glass-ionomer cements (C-GIC) in general demonstrated a lower sealing ability than the light-activated, resin-modified cements (RM-GIC). The adaptation of Photac-Fil quick is best without pretreatment--as recommended by the manufacturer.
本实验室研究旨在使用染料渗透法评估四种玻璃离子水门汀在颈部修复体（V类洞）中的边缘封闭能力。使用了两种传统玻璃离子水门汀（C-GIC）和两种树脂改性玻璃离子水门汀（RM-GIC），并分别在有无用聚丙烯酸进行牙本质预处理的情况下使用。
在48颗前磨牙的牙釉质牙骨质界的前庭和舌侧部分体外制备96个标准化尺寸的颈部洞。冠部边缘制备在牙釉质中，根尖边缘位于牙本质中。96个洞随机分为4组，每组n = 24。每组洞用一种测试材料填充，且仅一半的洞在填充前用聚丙烯酸进行20秒的牙本质预处理。充填物在凝固24小时后用一组磨片完成修整。修复后的牙齿在盐水中储存4周后进行染料渗透测试。使用半自动图像分析系统在40倍放大倍数下，在每颗牙齿的4个纵剖面上测量沿冠部和根尖边缘的染料渗透深度。
在牙釉质部位，染料渗透的平均深度范围为0（未预处理的ChemFil superior）至0.13毫米（预处理的ChemFil superior）；在牙本质部位，范围为0.02（预处理的Fuji II LC）至0.74毫米（未预处理和预处理的ChemFil superior）。
仅在Ketac-Fil组中，填充前对洞进行预处理显著改善了边缘适应性。一般来说，传统玻璃离子水门汀（C-GIC）的封闭能力低于光固化树脂改性玻璃离子水门汀（RM-GIC）。按照制造商的建议，Photac-Fil quick在不进行预处理的情况下适应性最佳。
