Yano Haruka Takesue, Ikeda Hiroshi, Nagamatsu Yuki, Masaki Chihiro, Hosokawa Ryuji, Shimizu Hiroshi
Division of Oral Reconstruction and Rehabilitation, Department of Oral Functions, Kyushu Dental University, Fukuoka, 803-8580, Japan; Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka, 803-8580, Japan.
Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka, 803-8580, Japan.
J Mech Behav Biomed Mater. 2020 Jan;101:103441. doi: 10.1016/j.jmbbm.2019.103441. Epub 2019 Sep 18.
The aim of this study was to investigate the relationship between the microstructure of a CAD/CAM composite and the silanization effect on adhesive bonding, using surface free energy (SFE) analysis. Six commercial CAD/CAM composites, as well as control samples of two glass-ceramics and a resin, were investigated. The samples were characterized by morphological observations and SFE analysis. The bonding characteristics of the samples with the resin-cement were evaluated according to the silanization effect, which was determined from the ratio between the shear-bond strengths for the sample groups, with and without a silane-primer application. The composites were classified into two groups in terms of their microstructure; ENAMIC exhibits a polymer-infiltrated-ceramic-network (PICN) structure, while the other composites have a dispersed-filler (DF) structure. The dispersive component of the SFE was significantly lower in the PICN composite than in the DF composites. On the other hand, the polar component of the SFE was significantly higher in the PICN composite than in the DF composites. These SFE components were similar to those of glass-ceramics for the PICN composite and to those of the resin for the DF composites. The silanization effect increased linearly with the polar component or with a decrease in the dispersive component. Additionally, the silanization effect increased with the inorganic content. As a result, the silanization effect was found to be the highest for the PICN structure of ENAMIC. The results revealed that the silanization effect on the adhesive bonding is more effective for a PICN composite than for a DF composite.
本研究的目的是通过表面自由能（SFE）分析，研究CAD/CAM复合材料的微观结构与硅烷化对粘结效果之间的关系。研究了六种商用CAD/CAM复合材料，以及两种玻璃陶瓷和一种树脂的对照样品。通过形态观察和SFE分析对样品进行表征。根据硅烷化效果评估样品与树脂水泥的粘结特性，硅烷化效果由应用和未应用硅烷底漆的样品组的剪切粘结强度之比确定。根据微观结构将复合材料分为两组；ENAMIC呈现聚合物渗透陶瓷网络（PICN）结构，而其他复合材料具有分散填料（DF）结构。PICN复合材料中SFE的分散成分明显低于DF复合材料。另一方面，PICN复合材料中SFE的极性成分明显高于DF复合材料。这些SFE成分与PICN复合材料的玻璃陶瓷成分以及DF复合材料的树脂成分相似。硅烷化效果随极性成分或分散成分的降低呈线性增加。此外，硅烷化效果随无机含量的增加而增加。结果发现，ENAMIC的PICN结构的硅烷化效果最高。结果表明，硅烷化对粘结的效果在PICN复合材料中比在DF复合材料中更有效。
