Mechanical Properties of Alkasite Material with Different Curing Modes and Simulated Aging Conditions

Scientific paper - Original scientific paper

• Author: Višnja Negovetić Mandić
• Author: Laura Plančak
• Author: Danijela Marović
• Author: Zrinka Tarle
• Author: Milena Trutina Gavran
• Author: Matej Par
• 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)

This study aimed to evaluate the micro-mechanical and macro-mechanical properties of self-cured and light-cured alkasite and to investigate how accelerated degradation in acidic, alkaline, and ethanol solutions affects the macro-mechanical properties of self-cured and light-cured alkasite. The specimens of the alkasite material (Cention Forte, Ivoclar Vivadent) were prepared according to the following three curing modes: (1) light-cured immediately, (2) light-cured after a 5-min delay, and (3) self-cured. Microhardness was tested before and after immersion in absolute ethanol to indirectly determine crosslink density, while flexural strength and flexural modulus were measured using a three-point bending test after accelerated aging in the following solutions: (1) lactic acid solution (pH = 4.0), (2) NaOH solution (pH = 13.0), (3) phosphate-buffered saline solution (pH = 7.4), and (4) 75% ethanol solution. The data were statistically analyzed using a two-way ANOVA and Tukey post hoc test. The results showed that the microhardness, flexural strength, and flexural modulus were significantly lower in self-cured specimens compared to light-cured specimens. A 5-min delay between the extrusion of the material from the capsule and light curing had no significant effect on any of the measured properties. A significant effect of the accelerated aging solutions on macro-mechanical properties was observed, with ethanol and alkaline solutions having a particularly detrimental effect. In conclusion, light curing was preferable to self-curing, as it resulted in significantly better micro- and macro-mechanical properties, while a 5-min delay between mixing the capsule and light curing had no negative effects.

• Keywords (english): dental materials; alkasite; resin composite; flexural properties; crosslink density
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Materials
• Numbering: vol. 17, no. 11, 2777
• e-ISSN: 1996-1944
• DOI: https://doi.org/10.3390/ma17112777
• URN:NBN: urn:nbn:hr:127:976686
• Publication: 2024-06-06
• Document URL: https://www.mdpi.com/1996-1944/17/11/2777
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-06-27 08:58:09