Direct tensile strength of visible light-cured restorative materials containing fluoride

Citation
M. Hotta et al., Direct tensile strength of visible light-cured restorative materials containing fluoride, J ORAL REH, 28(9), 2001, pp. 854-859
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Dentistry/Oral Surgery & Medicine
Journal title
JOURNAL OF ORAL REHABILITATION
ISSN journal
0305-182X → ACNP
Volume
28
Issue
9
Year of publication
2001
Pages
854 - 859
Database
ISI
SICI code
0305-182X(200109)28:9<854:DTSOVL>2.0.ZU;2-M
Abstract
The purpose of this study was to compare the fluoride release and direct te nsile strength at 24 h, 1 month, and 3 months of two conventional glass-ion omers, two visible light-cured resin-modified glass-ionomers, a polyacid re sin composite and two resin composites. The results were statistically anal ysed using ANOVA and Fisher's PLSD at alpha = 0.05. The data on fluoride re lease indicated that the immersion period (24 h, 1 month, and 3 months) sig nificantly influenced the cumulative amount of fluoride released (P < 0.001 ). The direct tensile strengths after 1 month of storage were significantly higher than those after 24 h or 3 months of storage (P < 0.001). Thus, the cements and resins were not weakened by the loss of fluoride. Conventional glass-ionomer cement showed the lowest direct tensile strength. Resin-modi fied glass-ionomer behaved in between the resin composites and conventional glass-ionomers in terms of all three testing times, however, the polyacid resin composites most closely resembled the resin composites. The polyacid resin composites had greatly enhanced direct tensile strength, however, thi s material also reduced the fluoride availability.