A fluoride-releasing composite for dental applications

• Published in: Dental materials Vol. 17; no. 2; pp. 127 - 133
• Main Authors: Glasspoole, E.A., Erickson, R.L., Davidson, C.L.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.03.2001
• Subjects: Acid Etching, Dental; Animals; Bisphenol A-Glycidyl Methacrylate - chemistry; Borates - chemistry; Cariostatic Agents - chemistry; Cattle; Composite Resins - chemistry; Compressive Strength; Dental Bonding; Dental Enamel - ultrastructure; Dental Materials - chemistry; Dentin-Bonding Agents - chemistry; Dentistry; Diametral tensile strength; Fluorides - chemistry; Glass Ionomer Cements - chemistry; Hardness; Linear fluoride release; Materials Testing; Methacrylates - chemistry; Microscopy, Electron, Scanning; Quartz - chemistry; Quaternary Ammonium Compounds - chemistry; Resin Cements - chemistry; Resin-based composite materials; Silanes - chemistry; Silicon Dioxide; Solubility; Statistics as Topic; Surface Properties; Tensile Strength; Water - chemistry; Zirconium; Resin-based composite materials; Linear fluoride release; Diametral tensile strength
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/S0109-5641(00)00051-8

Objectives: The aim of this work was to attempt formulation of a dental composite, for investigational purposes, which will release fluoride at a rate comparable to glass ionomer materials, while retaining physical properties adequate for potential use in a number of dental applications. Methods: An organic fluoride material, tetrabutylammonium tetrafluoroborate (TBATFB), was incorporated into a hydrophilic monomer system made of 2,2-bis[4-(2-hydroxy-3-methacroyloxypropoxy)phenyl]-propane (BisGMA) and 2-hydroxyethyl methacrylate (HEMA). This fluoride-containing monomer system was filled with silane treated quartz to 81 wt%. The resultant material was tested for fluoride release, physical strength properties and bond strength to enamel, each in comparison to control materials. Results: Cumulative fluoride release from the experimental composite was approximately linear over time and comparable to glass ionomer materials. The long term rate of release exceeded several of the glass ionomer materials tested. Diametral tensile strength was comparable to resin-modified glass ionomer (RMGI) materials. Bond strength to etched enamel was statistically equivalent to a commercially available hybrid composite control. Significance: The experimental resin-based composite material could potentially be used as an alternative to glass ionomer materials in non-stress bearing restorative applications and for orthodontic bracket bonding, where high fluoride release is desirable.