Effect of maturation on the fluoride release of resin-modified glass ionomer and polyacid-modified composite resin cements

• Published in: Biomaterials Vol. 21; no. 13; pp. 1373 - 1378
• Main Authors: Marks, Luc A.M, Verbeeck, Ronald M.H, De Maeyer, Erna A.P, Martens, Luc C
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.07.2000; Elsevier Science
• Subjects: Acrylic Resins - chemistry; Acrylic Resins - radiation effects; Biological and medical sciences; Chemical modification; Compomers; Composite Resins - chemistry; Composite Resins - radiation effects; Curing; Dental composites; Diffusion; Fluoride release profiles; Fluorides - chemistry; Fluorine compounds; Glass Ionomer Cements - chemistry; Glass Ionomer Cements - radiation effects; Glass ionomers; Humidity; Ionomers; Light; Materials Testing; Maturation; Medical sciences; Methacrylates - chemistry; Methacrylates - radiation effects; Photochemistry; Polyacid-modified composite resin; Polymeric glass; Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects); Resin modified; Silicates - chemistry; Silicates - radiation effects; Solubility; Technology. Biomaterials. Equipments. Material. Instrumentation; Time Factors; Water; Glass ionomers; Fluoride release profiles; Polyacid-modified composite resin; Maturation; Resin modified; Water; Ionomer; Cement; Contact interaction; Glass; Polyacid; Fluorides; Resins; Release; Composite material; Biomedical engineering
• ISSN: 0142-9612; 1878-5905
• DOI: 10.1016/S0142-9612(00)00026-0

The effect of an early water contact on the fluoride release is studied for the resin-modified glass ionomer cements (RM-GIC) GC Lining LC, PhotacBond, Vitremer and Vitrebond and for the polyacid-modified composite resins (PAM-C) Variglass and Dyract. Six months fluoride release profiles were determined in regularly renewed water (37°C), for the products directly after light curing and after 24 h maturation in a humid atmosphere (85% RH). ANOVA shows that both the short-term and the long-term fluoride release of a RM-GIC are influenced by this maturation. This indicates that direct water contact for this material should be avoided. For the RM-GIC a correlation is found between the initial fluoride release process and the long-term process. For the PAM-C materials, no differences in the fluoride release are found as a function of maturation, indicating that early water contact has no effect. The amounts of fluoride released by PAM-C are low compared to RM-GIC, which can affect their caries preventive potential. The results are explained on the basis of the setting reaction of both types of materials.