Mechanical Properties and Ion Release from Fibre-Reinforced Glass Ionomer Cement

Scientific paper - Original scientific paper

• Author: Anja Ivica
• Author: Ivan Šalinović
• Author: Silvana Jukić Krmek
• Author: Sufyan Garoushi
• Author: Lippo Lassila
• Author: Eija Säilynoja
• Author: Ivana Miletić
• Author's institution: (Zagreb University Hispital Center)
• Author's institution: University of Zagreb; School of Dental Medicine
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine; Endodonics and Restorative Dentistry

Abstract (english)

The aim of this study was to compare the mechanical properties and ion release from a commercially available resin-modified glass ionomer cement to a formulation reinforced by the addition of short glass fibres at various percentages. Methods: Three experimental groups were prepared by adding a mass ratio of 10%, 15% and 20% of short glass fibres to the powder portion of the cement from a capsule (GC Fuji II LC), while the control group contained no fibres. Microhardness (n = 12), fracture toughness, and flexural, compressive and diametral tensile strength (n = 8) were evaluated. To study ion release, readings were obtained utilising fluoro-selective and calcium-selective electrodes after 24 h, 7 days and 30 days (n = 12). The spatial distribution of fibres within the material was evaluated through scanning electron microscopy. The data were analysed using one-way ANOVA with a Bonferroni adjustment. Results: The findings suggest that elevating fibre weight ratios to 20 wt% results in improved mechanical properties (p < 0.05) in microhardness, flexural strength, diametral tensile strength and fracture toughness. In terms of ion release, a statistically significant difference (p < 0.001) was observed between the groups at the conclusion of 24 h and 7 days, when the fluoride release was much higher in the control group. However, after 30 days, no significant distinction among the groups was identified (p > 0.05). Regarding calcium release, no statistically significant differences were observed among the groups at any of the evaluated time points (p > 0.05). SEM showed the fibres were homogeneously incorporated into the cement in all experimental groups. Conclusions: Resin-modified glass ionomer enhanced with short glass fibres at a weight loading of 20% showcased the most favourable mechanical properties while concurrently maintaining the ability to release fluoride and calcium after a 30-day period.

• Keywords (english): glass fibres; glass ionomer cements; fluoride release; reinforcement
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Polymers
• Numbering: vol. 16, no. 5, 607
• e-ISSN: 2073-4360
• DOI: https://doi.org/10.3390/polym16050607
• URN:NBN: urn:nbn:hr:127:869506
• Publication: 2024-02-23
• Document URL: https://www.mdpi.com/2073-4360/16/5/607
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-06-28 10:31:28