Evaluation of F, Ca, and P release and microhardness of eleven ion-leaching restorative materials and the recharge efficacy using a new Ca/P containing fluoride varnish
Chirayu Ruengrungsom, Michael F Burrow, Peter Parashos, Joseph EA Palamara
Journal of Dentistry | ELSEVIER SCI LTD | Published : 2020
OBJECTIVES: The objectives of this study were to evaluate fluoride (F), calcium (Ca), and phosphate (P) release of ion-leaching restorative materials (ILMs), their recharge efficacy with a Ca/P-containing F varnish, and relative microhardness. METHODS: Thirteen groups of materials were investigated. Cylindrical-shaped specimens were fabricated. Deionised water or lactic-acid solution were used as the storage media. Solutions were changed after 1d, 4d, 7d, and 14d of ion release and at the same periods after recharge with MI Varnish (7 -h storage). F, Ca, and P measurements were accomplished using a fluoride-ion selective electrode, atomic absorption spectrometry, and colourimetric method by ..View full abstract
The authors gratefully acknowledge Mr. David Stanston for all laboratory support of Ca and P evaluation; Ms. Su Toulson for all laboratory facilities including the EDS analysis; and the Office of the Higher Education Commission, Thailand, giving the Ph.D. scholarship to Chirayu Ruengrungsom. Deep gratitude is extended to GC Australasia Dental PTY LTD, SDI Company Australia, Shofu Dental Asia-Pacific PTE LTD, DenMat Thailand, 3 M ESPE Thailand, SD Tantavade Thailand (Dealer of Activa Bioactive Restorative), and Ivoclar Vivadent Thailand for the supply of the materials. Sincere gratitude is also extended to Melbourne Dental School and Bio21 Institute, the University of Melbourne, Australia, for supporting other research materials and instruments.