title: Fluoride release from a new glass-ionomer cement.
abstract: This study compared the amount and pattern of fluoride release from a new glass-ionomer-based material (nano-ionomer) with other restorative materials and correlated the surface area to volume of nano-sized filler with its capacity to release fluoride in the powder, more quickly increasing the fluoride. The materials evaluated were a nano-ionomer (Ketac N 100), a conventional glass-ionomer cement (GC Fuji II), a resin-modified glass ionomer cement (GC Fuji II LC), a compomer (Dyract F) and a fluoride-releasing resin composite (Tetric N Flow). A resin composite (Synergy Flow) served as the control. Ten specimens were fabricated from each of these materials using a customized metal mold. The fluoride release was measured every 24 hours for the first seven days, and on days 14, 21 and 28, a combination fluoride ion—selective electrode connected to an ion analyzer. The data was analyzed by one-way ANOVA and Tukey HSD test (p=0.05). An initial fluoride “burst effect” was seen with all of the materials, except for the control and compomer. The conventional glass-ionomer cement showed the highest fluoride release on the first three days. The nano-ionomer showed the maximum release of fluoride for the remaining days. A low constant level of fluoride release was seen from the compomer and fluoride-releasing resin composite throughout the study period.
authors.affiliation: Saveetha University, Conservative Dentistry and Endodontics, Chennai, India. prasanna@totaldentalcare.org
authors.forename: P
authors.initials: P
authors.lastname: Neelakantan
authors.forename: S
authors.initials: S
authors.lastname: John
authors.forename: S
authors.initials: S
authors.lastname: Anand
authors.forename: N
authors.initials: N
authors.lastname: Sureshbabu
authors.forename: C
authors.initials: C
authors.lastname: Subbarao
mesh_terms: D000704:Analysis of Variance; D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D005459:Fluorides / Q000032:analysis*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing; D053758:Nanoparticles; D018709:Statistics, Nonparametric
chemical_list: D020770:Compomers; D003188:Composite Resins; D005899:Glass Ionomer Cements; D005459:Fluorides