title: Compressive strength, fluoride release and recharge of fluoride-releasing materials.
abstract: The compressive strength, fluoride releases and recharge profiles of 15 commercial fluoride-releasing restorative materials have been studied. The materials include glass ionomers (Fuji IX, Ketac Molar, Ketac Silver, and Miracle Mix), resin-modified glass ionomers (Fuji II LC Improved, Photac-Fil, and Vitremer), compomers (Compoglass, Dyract AP, F2000, and Hytac) and composite resins (Ariston pHc, Solitaire, Surefil and Tetric Ceram). A negative linear correlation was found between the compressive strength and fluoride release (r(2)=0.7741), i.e., restorative materials with high fluoride release have lower mechanical properties. The fluoride-releasing ability can be partially regenerated or recharged by using a topical fluoride agent. In general, materials with higher initial fluoride release have higher recharge capability (r(2)=0.7088). Five equations have been used in curve fitting to describe the cumulative fluoride release from different materials. The equation [F](c)=[F](I)(1-e(-bt))+betat best describes the cumulative fluoride release for most glass ionomers, resin-modified glass ionomers, and some high fluoride-releasing compomers and composites, whereas [F](c)=[F](I)/(t(1/2)+t)+alphat best describes the cumulative fluoride release for most compomers and composite resins. The clinic applications of different fluoride-releasing materials have also been discussed.
authors.affiliation: Department of Operative Dentistry and Biomaterials, School of Dentistry, Louisiana State University Health Science Center, 1100 Florida Ave., New Orleans, LA 70119, USA. xxu@lsuhsc.edu
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Xu
authors.forename: John O
authors.initials: JO
authors.lastname: Burgess
mesh_terms: D002327:Cariostatic Agents / Q000737:chemistry; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry*; D019245:Compressive Strength; D003692:Delayed-Action Preparations / Q000737:chemistry; D003731:Dental Caries / Q000517:prevention & control; D003764:Dental Materials / Q000737:chemistry*; D003793:Dental Restoration, Permanent / Q000379:methods*; D004548:Elasticity; D005459:Fluorides / Q000008:administration & dosage / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods*; D013314:Stress, Mechanical
chemical_list: D002327:Cariostatic Agents; D020770:Compomers; D003188:Composite Resins; D003692:Delayed-Action Preparations; D003764:Dental Materials; D005899:Glass Ionomer Cements; D005459:Fluorides