Effect of immersion in calcium solution on surface hardness of restorative glass ionomer cements

Research Project

Project/Area Number	26893072
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Prosthodontics/ Dental materials science and
Research Institution	Tokyo Medical and Dental University
Principal Investigator	Shiozawa Maho 東京医科歯科大学, 歯学部附属病院, 医員 (60735679)
Project Period (FY)	2014-08-29 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000) Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000) Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	グラスアイオノマーセメント / 塩化カルシウム / ビッカース硬さ / EDS / FTIR / XPS
Outline of Final Research Achievements	The effect of short-term immersion in calcium solution on the surface hardness of the restorative glass ionomer cements (GICs) was investigated. Vickers hardness of the GICs surfaces after immersion in the calcium chloride solution increased compared with that after immersion in deionized water. Ca was detected on the immersed GICs surfaces by XPS analysis. Ca was suggested to make chemical bond with the carboxyl group of the polyacrylic acid. Immersion of GICs in calcium chloride solution at the early stage of setting was considered to enhance the formation of the polyacid salt matrix; as a result, the surface hardness increased.

Report

(3 results)