Polymerization shrinkage mechanism, using micro-CT for tracing filler movement in light cured resin composite.

• Project/Area Number: 20791383
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Conservative dentistry
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: CHOU Eitetsu Tokyo Medical and Dental University, 歯学部附属病院, 助教 (50431929)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 光重合型コンポジットレジン / 重合収縮 / マイクロX線CT / マイクロフォーカスX線CT

Research Abstract

The aim of this study was to evaluate the shrinkage vectors of light-cured composites during polymerization in a deep class I cavity. Experimental resin composite was filled into a box-shaped class I cavity with or without a bonding agent. The polymerization shrinkage vectors depend on both depth and conversion degree. The application of micro-CT is a novel approach to present an overall profile and quantitatively measure shrinkage of dental composites.

Research Products

• [Journal Article] Evaluation of Resin Composite Polymerization by Three Dimensional Micro-CT Imaging and Nanoindentation
  • Author(s): Eitetsu Cho, Alireza Sadr, Norimich Inai, Junji Tagami
  • Journal Title: Dental Materials in press
  • Peer Reviewed
• [Presentation] Real-Time Gap Formation of Resin Composites Using SS-OCT during Photo polymerization (2010)
  • Author(s): J.R.MAYORAL
  • Organizer: IADR
  • Place of Presentation: Barcelona, Spain
  • Year and Date: 2010-07-17
• [Presentation] Regional shrinkage vectors of light-cured composites by micro-CT filler tracing (2010)
  • Author(s): Eitetsu Cho
  • Organizer: IADR
  • Place of Presentation: Barcelona, Spain
  • Year and Date: 2010-07-16
• [Presentation] Regional shrinkage vectors of light-cured composites by micro-CT filler tracing (2010)
  • Author(s): Eitetsu Cho
  • Organizer: IADR
  • Place of Presentation: バルセロナ
  • Year and Date: 2010-07-16
• [Presentation] マイクロCTを使ったコンポジットレジンの重合収縮挙動の観察 (2010)
  • Author(s): 趙永哲
  • Organizer: 第132回日本歯科保存学会
  • Place of Presentation: 熊本
  • Year and Date: 2010-06-05
• [Presentation] マイクロCTを使ったコンポジットレジンの重合収縮挙動の観察 (2010)
  • Author(s): 趙永哲
  • Organizer: 保存学会
  • Place of Presentation: 熊本
  • Year and Date: 2010-06-05
• [Presentation] Real-time Tomographic Monitoring of Composite Restoration Placement Using SS-OCT (2010)
  • Author(s): A.SADR
  • Organizer: AADR
  • Place of Presentation: WASHINGTON, DC, US
  • Year and Date: 2010-03-06