期刊
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
卷 30, 期 -, 页码 61-74出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmbbm.2013.10.018
关键词
Dentin; Remineralization; Adhesive; Raman; AFM
资金
- [CICOM/FEDER MAT2011 24551]
- [JA P08 CTS2568]
Introduction: Teeth are continuously subjected to mechanical loading during mastication, swallowing and parafunctional habits. The purpose of this study was to evaluate if mechanical loading is able to promote remineralization at etched and bonded dentin interfaces. Methods: Flat mid-coronal human dentin surfaces were subjected to different treatments: (1) demineralization by 37% phosphoric acid (PA) followed by application of an etch-and-rinse dentin adhesive: Adper (TM) Single Bond (SB) (PA+SB) or (2) treatment by 0.5 M ethylenediaminetetraacetic acid (EDTA) followed by SB (EDTA+SB); (3) application of an self-etch dentin adhesive: Clearfil SE Bond (SEB). Restorations were accomplished, incrementally, with resin composite. In half of the specimens, mechanical loading (100,000 cycles, 3 Hz, 49 N) was applied. APM imaging/nano-indentation, Raman spectroscopy/cluster analysis and dye assisted confocal microscopy evaluation (CLSM), were employed to detect remineralization at the interfaces. Results: In general, load cycling increased mechanical properties at the resin-dentin interface. Cluster analysis demonstrated a regular increase of the mineral-matrix ratio in EDTA+SB and SEB loaded specimens. CLSM showed a reduced micropermeability and nanoleakage after loading in bonded interfaces, and a most pronounced reduction in SEB samples. Interpretation: In vitro load cycling promoted remineralization at resin-dentin interfaces. Mineral content increased and nanomechanical properties were improved at both the hybrid layer and bottom of the hybrid layer. Higher mineral concentration in correspondence with a lesser concentration of demineralized dentin was observed, after loading. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据