Influence of composition and powder/liquid ratio on setting characteristics and mechanical properties of autopolymerized hard direct denture reline resins based on methyl methacrylate and ethylene glycol dimethacrylate

• OKUYAMA Yoshikazu

  Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University

• SHIRAISHI Takanobu

  Department of Dental and Biomedical Materials Science, Graduate School of Biomedical Sciences, Nagasaki University

• YOSHIDA Kazuhiro

  Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University

• KUROGI Tadafumi

  Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University

• WATANABE Ikuya

  Department of Dental and Biomedical Materials Science, Graduate School of Biomedical Sciences, Nagasaki University

• MURATA Hiroshi

  Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University

Abstract

We evaluated the influence of composition and powder/liquid (P/L) ratio on the setting characteristics and mechanical properties of autopolymerized hard direct denture reline resins composed of methyl methacrylate (MMA, monomethacrylate) and ethylene glycol dimethacrylate [EGDMA, dimethacrylate (cross-linking agent)], with poly (ethyl methacrylate) used as the powder, and a mixture of MMA and EGDMA containing p-tolyldiethanolamine as the monomer. Setting times were determined using an oscillating rheometer and mechanical properties were based on ISO specifications. Setting time increased exponentially with an increase in the ratio of EGDMA to MMA and decrease in P/L ratio. Materials with a liquid component of approximately 75–85 wt% EGDMA and a higher P/L ratio showed higher ultimate flexural strength and flexural modulus. Our results suggest that setting characteristics are more influenced by the ratio of monomethacrylate and cross-linking agent, whereas mechanical properties are more influenced by P/L ratio.

Journal

• Dental Materials Journal

  Dental Materials Journal 33 (4), 522-529, 2014

  The Japanese Society for Dental Materials and Devices

Keywords

• Reline resin
• Methyl methacrylate
• Ethylene glycol dimethacrylate
• Setting characteristics
• Mechanical properties

Details

• CRID: 1390282679694683136
• NII Article ID: 130004679322
• DOI: 10.4012/dmj.2014-077
• COI: 1:STN:280:DC%2BC2cfpt1Gluw%3D%3D
• ISSN: 18811361
• ISSN: 02874547
• HANDLE: 10069/34828
• PubMed: 24988884
• Web Site: https://nagasaki-u.repo.nii.ac.jp/records/5742
• Web Site: https://www.jstage.jst.go.jp/article/dmj/33/4/33_2014-077/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2015176107
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed