Studies on Modified Epoxy Acrylate Nano-composite Resin for Antibacterial Dental Restorative Materials
Date Issued
2015
Date
2015
Author(s)
Chien, Chia-Yu
Abstract
In this research, Epoxy acrylate (EA) was modified with isophorone diisocyanate (IPDI) and 2-Hydroxyethyl methacrylate (HEMA) to synthesize HI-EA, which was used as the resin matrix; whereas nano-aluminum oxide (Nano-Al2O3) and nano-silica (Nano-SiO2 ) was used as the inorganic filler to synthesize dental restorative composite resin. In order to overcome the problem of secondary caries, we have added antibacterial and anticavity elements into composite resin. By using materials that can also be used as inorganic filler: fluoride-releasing kaolinite, Epigallocatechin gallate (EGCG), and Nano-zinc antibacterial agent, we produced a series of antibacterial dental composite resins, and furthermore discussed their mechanical properties and antibacterial ability. In the foliated nano-Al2O3/ fluoride-releasing kaolinite series, as the content of the fluoride-releasing kaolinite increased, the antibacterial ability increased too. Also, under the condition of not influencing the mechanical property of the material, adding EGCG improved the antibacterial ability as well. However, due to the texture of kaolinite being quite soft and with limited inorganic content, the result of mechanical property was under expectation. In order to improve the hardness of the self-synthesized composite resins, we produced another series that contained modified nano-SiO2 mixed along with sphered nano-Al2O3 and fluoride-releasing kaolinite. Due to the content of inorganic filler can reach up to 70 wt%, this series has better hardness performance. Also the material has the same antibacterial trend as the foliated nano-Al2O3/ fluoride-releasing kaolinite series. The last part of the research was to use nano-zinc as the antibacterial element to synthesis composite resin. Due to the higher inorganic filler content, this series has a higher performance in hardness compared to products available in the current market. After adding 1000 ppm of nano-zinc antibacterial agent into the composite resin, the materials would have certain antibacterial ability.
Subjects
Dental restorative materials
Epigallocatechin gallate
Fluoride
Kaolinite
Nano-zinc
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02549019-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):5addf96f62692f324693547d6b899054