Density, Polymerization Shrinkage, Filler Content and Coefficient of Thermal Expansion of Composite Resins for Crown and Bridge

  • HIROSE Hideharu
    Department of Dental Materials, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
  • KAWAMOTO Yoshikazu
    Department of Crown and Bridge Prosthodontics, Nihon University School of Dentisry Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
  • KOJIMA Taishi
    Department of Dental Materials, Nihon University School of Dentistry
  • SAKAGUCHI Setsuko
    Dental Technician Training School, Nihon University School of Dentistry
  • KIMURA Kenji
    Dental Technician Training School, Nihon University School of Dentistry
  • SAITOH Masahiro
    Department of Dental Materials, Nihon University School of Dentistry
  • YOSHIHASHI Kazue
    Department of Dental Materials, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
  • MATSUMURA Hideo
    Department of Crown and Bridge Prosthodontics, Nihon University School of Dentisry Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
  • NISHIYAMA Minoru
    Department of Dental Materials, Nihon University School of Dentistry Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry

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Other Title
  • 歯冠補綴用コンポジットレジンの密度, 重合収縮率, フィラー含量および熱膨張係数

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Description

Density, polymerization shrinkage, filler content, constituent elements of filler and thermal expansion of ten composite resins (A3 enamel and dentin pastes) for crown and bridge were measured. Density of composite pastes was 1.493-2.528g/cm3, and that of set composites was 1.588-2.561g/cm3. Polymerization shrinkage of composites was 1.17-5.98 vol%. Inorganic filler content was 44.9-88.3wt%. Si or Al was the main component element of inorganic filler, and Ba, La, Sr, Zr and Zn were added as X-ray opaque materials. Thermal expansion was 16.8-96.4×10-6/℃ (30-80℃). With an increase in inorganic filler, polymerization shrinkage and thermal expansion decreased.

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