title: Detection of ions released from S-PRG fillers and their modulation effect.
abstract: The purpose of this study was to analyze the ions released from a surface pre-reacted glass ionomer (S-PRG) filler in distilled water or lactic acid solution. S-PRG filler was mixed with either solution at 1000:1, 100:1, 10:1, and 1:1 ratios by weight. By means of inductively coupled plasma atomic emission spectroscopy and a fluoride electrode, elements released from S-PRG filler were identified to be Al, B, Na, Si, Sr, and F. To investigate the effect of solution pH on ion release, the pH values of the solutions before mixing and after 24 hours' mixing with S-PRG were measured. After 24 hours' mixing, the pH values of solutions at all ratios became more neutral or weakly alkaline regardless of their initial pH levels before mixing. In conclusion, results showed that S-PRG filler released several types of ions, and that ion release was influenced by the mixing ratio of the solution rather than the initial pH of the solution.
authors.affiliation: Department of Operative Dentistry, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fujimoto
authors.forename: Mika
authors.initials: M
authors.lastname: Iwasa
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Murayama
authors.forename: Masashi
authors.initials: M
authors.lastname: Miyazaki
authors.forename: Akihiro
authors.initials: A
authors.lastname: Nagafuji
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Nakatsuka
mesh_terms: D000468:Alkalies / Q000737:chemistry; D000535:Aluminum / Q000032:analysis; D000538:Aluminum Silicates / Q000737:chemistry; D001895:Boron / Q000032:analysis; D002626:Chemistry, Pharmaceutical; D004058:Diffusion; D005459:Fluorides / Q000032:analysis; D005898:Glass / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000032:analysis / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes; D007477:Ions; D019344:Lactic Acid / Q000737:chemistry*; D008422:Materials Testing; D012825:Silicon / Q000032:analysis; D012964:Sodium / Q000032:analysis; D013054:Spectrophotometry, Atomic; D013324:Strontium / Q000032:analysis; D013997:Time Factors; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000468:Alkalies; D000538:Aluminum Silicates; D005899:Glass Ionomer Cements; D007477:Ions; D014867:Water; D019344:Lactic Acid; D012964:Sodium; D000535:Aluminum; D001895:Boron; D005459:Fluorides; D013324:Strontium; D012825:Silicon