Department of Operative Dentistry, Nihon University School of Dentistry.
Dent Mater J. 2020 Sep 29;39(5):834-843. doi: 10.4012/dmj.2019-247. Epub 2020 May 19.
The aim of this study was to determine the influence of different surface treatments of CAD/CAM composite blocks on bonding effectiveness of resin cements, based on the shear bond strength test and the surface science examination. Specimens were fabricated from two types of CAD/CAM composite blocks (Cerasmart and VITA Enamic), and the specimen surfaces were alumina sandblasted. Specimen surfaces were treated with i) silane, ii) primer, and iii) silane+primer, then two types of cements (Block HC Cem and Super Bond) were bonded. After 24 h storage, bond strengths were measured. Surface free energy measurements were performed of the treated CAD/CAM composite blocks surfaces. The groups ii) and iii) showed significantly higher bond strengths than the group i), apart from VITA Enamic with Block HC Cem. Although the total surface free energy showed different trends in different surface treatments, a similar trend was found in both CAD/CAM composite blocks.
本研究旨在通过剪切结合强度测试和表面科学检查，确定 CAD/CAM 复合块不同表面处理方法对树脂水门汀粘结效果的影响。从两种 CAD/CAM 复合块（Cerasmart 和 VITA Enamic）中制备试件，并对试件表面进行氧化铝喷砂处理。然后对试件表面进行以下三种处理：i）硅烷处理，ii）底涂处理，iii）硅烷+底涂处理，再粘结两种水门汀（Block HC Cem 和 Super Bond）。在 24 小时储存后，测量粘结强度。对处理后的 CAD/CAM 复合块表面进行表面自由能测量。除了 VITA Enamic 与 Block HC Cem 的粘结强度外，组 ii）和组 iii）的粘结强度明显高于组 i）。虽然不同表面处理的总表面自由能呈现出不同的趋势，但在两种 CAD/CAM 复合块中都发现了相似的趋势。
