The durability of phosphoric acid promoted bioglass-dentin interaction layer

被引:39
作者
Bakry, A. S. [1 ,2 ,3 ]
Takahashi, H. [4 ,5 ]
Otsuki, M. [6 ]
Tagami, J. [6 ,7 ]
机构
[1] King Abdulaziz Univ, Fac Dent, Dept Operat Dent, Jeddah 21413, Saudi Arabia
[2] Tokyo Med & Dent Univ, Grad Sch Med & Dent Sci, Japan Soc Promot Sci Cariol & Operat Dent, Dept Restorat Sci,Bunkyo Ku, Tokyo 1138549, Japan
[3] Univ Alexandria, Fac Dent, Conservat Dent Dept, Alexandria, Egypt
[4] Tokyo Med & Dent Univ, Fac Dent, Dept Oral Mat Sci & Technol, Course Oral Hlth Engn,Sch Hlth Care Sci,Bunkyo Ku, Tokyo 1138549, Japan
[5] Dent Univ, Bunkyo Ku, Tokyo 1138549, Japan
[6] Tokyo Med & Dent Univ, Grad Sch Med & Dent Sci, Dept Restorat Sci, Bunkyo Ku, Tokyo 1138549, Japan
[7] Tokyo Med & Dent Univ, ICTB, Global Ctr Excellence Program, Tokyo 1138549, Japan
关键词
45S5; Bioglass; Brushing-abrasion; Permeability; DESENSITIZING AGENTS; TUBULE OCCLUSION; PERMEABILITY; REMINERALIZATION; FLUORIDE; OXALATE;
D O I
10.1016/j.dental.2012.12.002
中图分类号
R78 [口腔科学];
学科分类号
100302 [口腔临床医学];
摘要
Objectives. Phosphoric acid-Bioglass 45S5 paste can create an interaction layer formed of calcium-phosphate crystals on the dentin surface. In this study, the efficiency of decreasing the dentin permeability exerted by the interaction layer formed between bioglass and dentin was compared to a resin-containing oxalate desensitizing agent (MS Coat One) and a resin-free oxalate desensitizing agent (Super Seal). Methods. Dentin permeability was measured before/after a brushing abrasion challenge, followed by examining the top and the fractured dentin surfaces with a field emission scanning electron microscope. Moreover, the chemical nature of the compounds formed on top of the dentin surface was examined using the field emission scanning electron microscope (FE-SEM) equipped with an energy-dispersive X-ray spectroscope (EDS), and the crystalline structures of the dentinal surfaces were examined by X-ray diffraction (XRD). Results. The results showed that application of 45S5 bioglass paste to dentin was able to occlude patent dentinal tubule orifices with a layer of calcium-phosphate crystals, while the oxalate containing agents were able to form small crystals which were found in dentinal tubule orifices and scattered along the superficial parts of the dentinal tubule lumen. The brushing-abrasion challenge significantly increased the permeability of dentin treated by Super Seal and MS Coat One, while these challenges had no significant effect on the dentin permeability of specimens treated with 45S5 bioglass paste. Significance. The new technique provided better durability than two products available on the market. Moreover, our previous research showed the biocompatibility of using this technique on dental pulp cells, suggesting that this technique can aid in treating dentin hypersensitivity cases. (C) 2012 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:357 / 364
页数:8
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