OCT evaluation of marginal gaps and secondary caries around composite restorations

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K11107
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Conservative dentistry
• Research Institution: Tokyo Medical and Dental University
• Principal Investigator: SADR Alireza 東京医科歯科大学, 大学院医歯学総合研究科, 非常勤講師 (20567755)
• Co-Investigator(Renkei-kenkyūsha): SHIMADA Yasushi 岡山大学, 医歯薬学総合研究科, 准教授 (60282761)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 保存修復学 / コヒーレンストモグラフィー / コンポジットレジン

Outline of Final Research Achievements

Secondary caries around the composite dental restoration is difficult to evaluate at the early stages by visual inspection or X-ray examination. Optical coherence tomography (OCT) can observe tomographic images of tissues and restorations in real time. This project focused on variety of experiments to study gap and secondary caries formation in different dental adhesive adhesive systems using swept-source OCT (SS-OCT).
In this project, we could establish 2D, 3D and real-time imaging and analytical methods of dental hard tissue and restorative materials for SS-OCT. Real-time observation of gap formation under polymerization shrinkage has resulted a new understanding of the mechanism of failures in dental treatment. The methodology greatly contributes to the development of new bulk-fill composite materials. Nondestructive and immediate cross-sectional observation are the biggest advantage of OCT resulting in meaningful results for this research project.

Free Research Field

医歯薬学