LEACHABILITY OF DENTURE-BASE ACRYLIC RESINS IN ARTIFICIAL SALIVA

被引：79

作者：

KODA, T

TSUCHIYA, H

YAMAUCHI, M

OHTANI, S

TAKAGI, N

KAWANO, J

机构：

[1] First Department, Prosthodontics Asahi University School of Dentistry 1851 Hozumi, Motosu Gifu

[2] Department of Dental Pharmacology Asahi University School of Dentistry 1851 Hozumi, Motosu Gifu

来源：

DENTAL MATERIALS | 1990年 / 6卷 / 01期

关键词：

D O I：

10.1016/0109-5641(90)90037-F

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

We studied the influence of salivary acidity on leachability of denture-base acrylic resins with etiological interest in denture stomatitis because denture surfaces are frequently exposed to acidic conditions in the oral cavities. Auto-, heat-, and microwave-polymerized resins were immersed in artificial saliva with pH ranging from 4.0 to 6.8 at 37°C, and leachables were pursued quantitatively with time. Methyl methacrylate, methacrylic acid, and benzoic acid leached from all resins. Their concentrations in the saliva were markedly high for auto-polymerized resins, while leachability of heat- and microwave-polymerized resins was so low that quantitative analysis of leachables was impossible. Lower pH showed higher concentrations of methyl methacrylate, although no apparent association was confirmed between salivary acidity and its own leachability. The concentrations of methacrylic acid increased remarkably with an increase in pH, which was probably due to hydrolysis of methyl methacrylate. These results suggests that chemotoxic actions of auto-polymerized resins are potentially ascribable to methyl methacrylate under more acidic conditions and to methacrylic acid under less acidic conditions. © 1990.

引用

页码：13 / 16

页数：4

共 21 条

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