title: Effects of immersion in solution of an experimental toothpaste containing S-PRG filler on like-remineralizing ability of etched enamel.
abstract: This study investigated the like-remineralizing ability of experimental toothpaste containing surface reaction-type pre-reacted glassionomer (S-PRG) filler on etched enamel. Human enamel blocks were etched with 35% phosphoric acid and immersed in 5-mL distilled water, fourfold diluted solution of NaF-containing toothpaste, or S-PRG filler-containing experimental toothpaste. Nanoindentation testing was carried out during immersion and the enamel surfaces were observed by scanning electron microscopy. Elemental analysis of the ions in each solution was performed using inductively coupled plasma atomic emission spectroscopy and fluoride electrode. After 1 month of immersion, the hardness and elastic modulus of the specimen immersed in S-PRG filler-containing toothpaste showed significantly greater values than those of the specimen immersed in NaF-containing toothpaste. Considerable amounts of Al, B, Na, Si, Sr, F ions were detected in the solution of S-PRG filler-containing toothpaste. Experimental S-PRG filler-containing toothpaste may enhance the like-remineralizing ability of etched enamel surfaces due to its ion-releasing ability.
authors.affiliation: Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Iijima
authors.forename: Shuichi
authors.initials: S
authors.lastname: Ito
authors.forename: Susumu
authors.initials: S
authors.lastname: Nakagaki
authors.forename: Naohisa
authors.initials: N
authors.lastname: Kohda
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muguruma
authors.forename: Takashi
authors.initials: T
authors.lastname: Saito
authors.forename: Itaru
authors.initials: I
authors.lastname: Mizoguchi
mesh_terms: D000134:Acid Etching, Dental; D003743:Dental Enamel; D012996:Solutions; D014089:Tooth Remineralization; D014100:Toothpastes
chemical_list: D012996:Solutions; D014100:Toothpastes