A photoacoustic FTIRS study of the chemical modifications of human dentin surfaces: II. Deproteination

被引：72

作者：

Di Renzo, M

Ellis, TH

Sacher, E

Stangel, I

机构：

[1] Univ Montreal, Dept Chim, Montreal, PQ H3C 3J7, Canada

[2] Ecole Polytech, Dept Genie Phys, Montreal, PQ H3C 3A7, Canada

[3] McGill Univ, Fac Dent, Montreal, PQ H3A 1A4, Canada

来源：

BIOMATERIALS | 2001年 / 22卷 / 08期

关键词：

dentin deproteination; sodium hypochlorite; acid etching; photoacoustic infrared spectroscopy; chemical modifications;

D O I：

10.1016/S0142-9612(00)00239-8

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

This work focuses on the chemical alterations occurring on the dentin surface on treatment with sodium hypochlorite (NaOCl), a known deproteinating agent. In addition, sequential treatment with both acid and NaOCl are characterized. Modifications are evaluated using photoacoustic FTIR (PA-FTIRS), a surface-sensitive spectroscopy. Spectra of NaOCl-treated dentin samples show a slow and heterogeneous removal of its organic phase, leaving calcium hydroxyapatite and carbonate apatite unchanged. Spectra of this deproteinated surface resemble those of apatites synthesized at low temperatures and having very high-surface areas. A combined sequential 2-min treatment of dentin with both maleic acid and NaOCl indicates that this treatment can produce a surface region which is neither significantly demineralized nor deproteinated. This sequential treatment can be used to remove the smear layer and restore the dentin surface to its natural composition. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：793 / 797

页数：5

共 27 条

[1] Water at surfaces: What can we learn from vibrational spectroscopy? [J].