Division of Oral Reconstruction and Rehabilitation, Department of Oral Functions, Kyushu Dental University.
Division of Biomaterials, Department of Oral Functions, Kyushu Dental University.
Dent Mater J. 2021 Mar 31;40(2):431-438. doi: 10.4012/dmj.2020-023. Epub 2020 Nov 19.
The purpose of this study is to clarify physical and chemical changes in surfaces of CAD/CAM composites caused by alumina airborne-particle abrasion and its effect on adhesive bonding. Our study involved three dispersed filler (DF)-based and a polymer-infiltrated ceramic network (PICN)-based CAD/CAM composites. Changes in the surface morphologies of the composites were examined, and surface free energy (SFE) analysis was performed based on Owens-Wendt theory. The influence of the abrasion on the bond strengths of CAD/CAM composites to the resin cement was characterized by shear bond strength (SBS) test. The abrasion increased the roughness of the composites. The SFE analysis showed that the abrasion significantly increased the dispersive component but decreased the polar component of the SFE associated with the DF-based composites, while no change occurred for those of the PICN-based composite. The abrasion slightly improved the SBSs for the DF-based composites but not that of the PICN-based composite.
本研究旨在阐明氧化铝喷丸磨损对 CAD/CAM 复合材料表面理化性质的影响及其对黏接性能的影响。我们的研究涉及三种分散填料（DF）基和一种聚合物渗透陶瓷网络（PICN）基 CAD/CAM 复合材料。检测了复合材料表面形貌的变化，并基于 Owens-Wendt 理论进行了表面自由能（SFE）分析。通过剪切黏结强度（SBS）试验来表征磨损对 CAD/CAM 复合材料与树脂水门汀黏结强度的影响。磨损增加了复合材料的粗糙度。SFE 分析表明，磨损显著增加了 DF 基复合材料的分散分量，但降低了 SFE 的极性分量，而 PICN 基复合材料的 SFE 则没有变化。磨损略微提高了 DF 基复合材料的 SBS，但对 PICN 基复合材料的 SBS 没有影响。
