Influence of monomer type, plasticizer content, and powder/liquid ratio on setting characteristics of acrylic permanent soft denture liners based on poly(ethyl methacrylate/butyl methacrylate) and acetyl tributyl citrate

被引：4

作者：

Mori, Tomoyasu ^{[1
]}

Takase, Kazuma ^{[1
]}

Yoshida, Kazuhiro ^{[1
]}

Okazaki, Hitomi ^{[1
]}

Murata, Hiroshi ^{[1
]}

机构：

[1] Nagasaki Univ, Grad Sch Biomed Sci, Dept Prosthet Dent, 1-7-1 Sakamoto, Nagasaki 8528588, Japan

来源：

DENTAL MATERIALS JOURNAL | 2021年 / 40卷 / 04期

关键词：

Soft denture liners; Gelation time; Dynamic viscoelasticity; Acetyl tributyl citrate; Monomer; TISSUE CONDITIONERS; DYNAMIC VISCOELASTICITY; LINING MATERIALS; BOND STRENGTH; POLYMER; GELATION;

D O I：

10.4012/dmj.2020-319

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

We evaluated the influence of monomer type, plasticizer content, and powder/liquid (P/L) ratio on the setting characteristics of light-cured acrylic permanent soft denture liners based on poly(ethyl methacrylate/butyl methacrylate). Two monomers, iso-butyl methacrylate (i-BMA) and 2-ethylhexyl methacrylate (2-EHMA), that contained various concentrations of the plasticizer acetyl tributyl citrate (ATBC) and trace amounts of the photo initiator and reducing agent were used. The P/L ratio was 1.0 or 1.2. The gelation time was measured using a controlled stress rheometer. Materials with i-BMA had shorter gelation times than those for materials with 2-EHMA. The gelation time increased exponentially with increasing plasticizer content. A higher P/L ratio led to a shorter gelation time. The effects of monomer type and plasticizer content were larger than that for the P/L ratio. These results show that 2-EHMA is a suitable monomer for soft denture liners and that the setting characteristics can be controlled via ATBC content.

引用

页码：918 / 927

页数：10