Adhesive properties and mechanism of resinous materials to Er.YAG and CO_2 lased dentin

树脂材料对Er.YAG和CO_2激光牙本质的粘附性能及机理

基本信息

批准号：
12671852
负责人：
SHINTANI Hideaki
金额：
$ 2.11万
依托单位：
HIROSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671852/
关键词：
Er:YAG Laser CO2 Laser Adhesive resin Dentin Bonding Mechanism of Adhesion Interface of Adhesion Morphological Study Analytical-chemical Study CO2レーザー形態学研究 Er:YAGレーザー

项目摘要

This study was to investigate 1) the changes of surface characteristics of Er:YAG or CO2 lased dentin and 2) the adhesive properties of resinous materials to the lased dentin.Labial surface of freshly extracted bovine tooth was ground to expose flat dentin. The dentin surfaces were then polished with 600-grid SiC paper and were irradiated by Er:YAG laser (60mJ/pulse, 10pps). The superficial layer of the lased dentin was morphologically examined by Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). The surface characteristics of lased dentin were chemically analyzed using X-ray Photoelectron Spectroscopy (XPS). In addition, the laser-irradiated cavity was restored with Mega Bond/AP-X according to the manufacturer's instructions, and the interfacial micro- and ultra-structures were observed under Scanning Electron Microscopy (SEM).The AFM observation revealed that the structural defects such as micro cracks and stratified structures were formed. By the TEM observat … More ions, the amorphous matrix substances of 10-15mm thickness, which consisted of denatured dentin collagen, were superficially observed. The analysis of XPS wide-scan spectrum of lased dentin surface showed the intensity of both CIs and NIs peaks obviously decreased. The SEM examination of resin-dentin interface revealed that the degenerated layer of 10-12mm thickness was observed beneath the hybrid layer.Early bond strength and durability of adhesion of the commercial adhesives to the lased dentin were significantly lower than those to the rotary cut dentin in micro-tensile bond test. This might be caused by the concentration of stress to those structural defects, by the inhibition of resin-impregnation due to the denatured layer, or by the deterioration of mechanical properties of the hybrid layer and the lased dentin itself.It was suggested that both the structural defects and the denatured layer affect the adhesive properties of resinous materials to the Er:YAG laser-irradiated dentin. Less

这项研究是为了研究1）ER的表面特征的变化：Yag或CO2 lase牙本质和2）可靠材料对lased牙本质的粘合性能。新鲜萃取的牛牙齿的清晰表面被磨碎以暴露于扁平的牙本质。然后用600网格的SIC纸抛光牙本质表面，并被ER：YAG激光（60MJ/PULSE，10pps）辐射。通过原子力显微镜（AFM）和透射电子显微镜（TEM）对LADAD牙本质的浅表层进行形态学检查。使用X射线光电子光谱（XPS）对LASE牙本质的表面特征进行化学分析。此外，根据制造商的说明，用巨型键/AP-X恢复了激光辐照的腔，并在扫描电子显微镜（SEM）下观察到界面微生物和超结构。AFM观察结果表明，如微裂纹和分层结构形成了结构性缺陷。通过TEM观察……更多的离子，超过10-15mm厚度的无定形基质物质，由牙本质胶原蛋白组成。 XPS宽牙本质表面XPS宽扫描谱的分析表明，顺式和NIS峰的强度显然得到了改善。树脂丁丁界面的SEM检查表明，在混合层下方观察到10-12mm厚度的退化层。在微张紧键试验中，商业粘合剂对LADED牙本质的粘合剂的早期键强度和耐用性明显低于旋转切割的牙本质。这可能是由于压力集中到那些结构缺陷的浓度，由于变性层引起的树脂浸渍的抑制作用，或通过定义杂交层的机械性能和LADED牙本质本身的定义，这都建议结构缺陷和变性层影响可靠材料的适当特性。较少的