Influence of light intensity on contraction stress of flowable resins

• Takamizawa Toshiki

  Department of Operative Dentistry, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry

• Yamamoto Akira

  Department of Operative Dentistry, Nihon University School of Dentistry

• Inoue Naoki

  Department of Operative Dentistry, Nihon University School of Dentistry

• Tsujimoto Akimasa

  Department of Operative Dentistry, Nihon University School of Dentistry

• Oto Tatsuki

  Department of Operative Dentistry, Nihon University School of Dentistry

• Irokawa Atsushi

  Department of Operative Dentistry, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry

• Tsubota Keishi

  Department of Operative Dentistry, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry

• Miyazaki Masashi

  Department of Operative Dentistry, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry

抄録

The purpose of this study was to evaluate the influence of power density on contraction stress of resin composite restorative materials during photo-polymerization. Six flowable resin composites, and a hybrid resin composite for comparison, were used. The composites were polymerized with the power density adjusted to either 100 or 600 mW/cm². Stress development was determined with a custom-made tensilometer. The adhesive was placed in a thin layer on a steel rod and resin paste was packed into the mold. The contraction force (N) generated during polymerization was continuously recorded and the maximum contraction stress (MPa) was calculated. Data were analyzed statistically. When the power density was adjusted to 100 mW/cm², the average contraction stress ranged from 0.30 to 0.50 MPa for the flowable composites, compared with 0.35 MPa for the hybrid composite. When the power density was adjusted to 600 mW/cm², the average contraction stress ranged from 0.34 to 1.00 MPa for the flowable composites and 0.69 MPa for the hybrid composite comparison. For all materials tested except Estelite Flow Quick, contraction stress increased with higher power density. The present results indicate that contraction stress during polymerization is influenced by power density and resin composite type. (J. Oral Sci. 50, 37-43, 2008)

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　Ｏｒａｌ　Ｓｃｉｅｎｃｅ

  Ｊｏｕｒｎａｌ　ｏｆ　Ｏｒａｌ　Ｓｃｉｅｎｃｅ 50 (1), 37-43, 2008

  日本大学歯学部

キーワード

• flowable resin
• polymerization shrinkage
• contraction stress

詳細情報

• CRID: 1390282680022416128
• NII論文ID: 130000072859
• DOI: 10.2334/josnusd.50.37
• ISSN: 18804926
• ISSN: 13434934
• Web Site: https://www.jstage.jst.go.jp/article/josnusd/50/1/50_1_37/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2008263672
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可