Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia.
Department of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Croatia.
Dent Mater. 2014 Sep;30(9):1052-60. doi: 10.1016/j.dental.2014.06.001. Epub 2014 Jul 8.
The aim of this study was to examine the influence of the addition of glass fillers with different sizes and degrees of silanization percentages to remineralizing composite materials based on amorphous calcium phosphate (ACP).
Four different materials were tested in this study. Three ACP based materials: 0-ACP (40 wt% ACP, 60 wt% resin), Ba-ACP (40 wt% ACP, 50 wt% resin, 10 wt% barium-glass) and Sr-ACP (40 wt% ACP, 50 wt% resin, 10 wt% strontium-glass) were compared to the control material, resin modified glass ionomer (Fuji II LC capsule, GC, Japan). The fillers and composites were characterized using scanning electron microscopy. Flexural strength and modulus were determined using a three-point bending test. Calcium and phosphate ion release from ACP based composites was measured using inductively coupled plasma atomic emission spectroscopy.
The addition of barium-glass fillers (35.4 (29.1-42.1) MPa) (median (25-75%)) had improved the flexural strength in comparison to the 0-ACP (24.8 (20.8-36.9) MPa) and glass ionomer control (33.1 (29.7-36.2) MPa). The admixture of strontium-glass (20.3 (19.5-22.2) MPa) did not have any effect on flexural strength, but significantly improved its flexural modulus (6.4 (4.8-6.9) GPa) in comparison to 0-ACP (3.9 (3.4-4.1) GPa) and Ba-ACP (4.6 (4.2-6.9) GPa). Ion release kinetics was not affected by the addition of inert fillers to the ACP composites.
Incorporation of barium-glass fillers to the composition of ACP composites contributed to the improvement of flexural strength and modulus, with no adverse influence on ion release profiles.
本研究旨在研究向基于无定形磷酸钙（ACP）的再矿化复合材料中添加不同粒径和不同硅烷化百分比的玻璃填料对其的影响。
本研究共测试了四种不同的材料。三种基于 ACP 的材料：0-ACP（40wt%ACP，60wt%树脂）、Ba-ACP（40wt%ACP，50wt%树脂，10wt%钡玻璃）和 Sr-ACP（40wt%ACP，50wt%树脂，10wt%锶玻璃）与对照材料，树脂改性玻璃离子体（Fuji II LC 胶囊，GC，日本）进行了比较。使用扫描电子显微镜对填料和复合材料进行了表征。使用三点弯曲试验测定了弯曲强度和模量。使用电感耦合等离子体原子发射光谱法测量了 ACP 基复合材料中钙和磷酸盐离子的释放。
与 0-ACP（24.8（20.8-36.9）MPa）和玻璃离子体对照（33.1（29.7-36.2）MPa）相比，添加钡玻璃填料（35.4（29.1-42.1）MPa）（中位数（25-75%））提高了弯曲强度。锶玻璃的混合物（20.3（19.5-22.2）MPa）对弯曲强度没有影响，但与 0-ACP（3.9（3.4-4.1）GPa）和 Ba-ACP（4.6（4.2-6.9）GPa）相比，显著提高了其弯曲模量（6.4（4.8-6.9）GPa）。向 ACP 复合材料中添加惰性填料不会影响离子释放动力学。
将钡玻璃填料加入 ACP 复合材料的组成中，有助于提高弯曲强度和模量，而对离子释放曲线没有不利影响。
