Fortin D, Vargas M A, Swift E J
Department of Operative Dentistry, University of North Carolina, Chapel Hill 27599-7450, USA.
Am J Dent. 1995 Aug;8(4):201-4.
To evaluate the bonding between resin composites and resin-modified glass ionomer restorative materials.
Bar-shaped specimens of Fuji II LC, Photac-Fil, and Vitremer were fabricated in a mold. After application of unfilled resin, resin composite (either Silux Plus or Restorative Z100) was condensed into the mold against the glass ionomer substrate and was light-cured. These bonded specimens, as well as intact specimens of each material, were placed on a three-point bending apparatus and were loaded until failure using a Zwick testing machine. The transverse strength of each specimen was calculated.
Mean transverse strengths of bonded specimens ranged from 50% to 78% of the transverse strength of the intact glass ionomer materials. The lowest transverse strength was 18.1 MPa, for Photac-Fil/Z100, and the highest was 29.6 MPa, for Fuji II LC/Silux. Statistical analysis indicated that the type of composite used had no significant effect on transverse strength. However, the type of resin-modified glass ionomer used was significant. Although there was much overlap between materials, bonded specimens made with Fuji II LC had the highest absolute strength, and those made with Photac-Fil had the lowest absolute strength. Bonded Vitremer specimens had the highest transverse strength relative to the cohesive strength of the material.
评估树脂复合材料与树脂改性玻璃离子修复材料之间的粘结情况。
在模具中制作富士II LC、Photac - Fil和Vitremer的棒状试件。涂抹未填充树脂后，将树脂复合材料（Silux Plus或Restorative Z100）靠在玻璃离子基底上压入模具并进行光固化。这些粘结试件以及每种材料的完整试件被放置在三点弯曲装置上，使用Zwick试验机加载直至破坏。计算每个试件的横向强度。
粘结试件的平均横向强度为完整玻璃离子材料横向强度的50%至78%。横向强度最低的是Photac - Fil/Z100，为18.1MPa，最高的是富士II LC/Silux，为29.6MPa。统计分析表明，所用复合材料的类型对横向强度没有显著影响。然而，所用树脂改性玻璃离子的类型有显著影响。尽管材料之间有很多重叠，但用富士II LC制作的粘结试件绝对强度最高，用Photac - Fil制作的最低。相对于材料的内聚强度，粘结的Vitremer试件横向强度最高。
