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The effects of ultrasonic cavitation on the dissolution of lithium disilicate glass.

ABSTRACT: There has been little research conducted on how ultrasonic cavitation may affect glass dissolution. The focus of this study was to examine how the mechanisms and kinetics of glass dissolution may change in a system that included ultrasonication. Experiments were conducted on lithium disilicate glass in deionized water at 50 °C between 1 and 7.5 h. Results showed that the erosion from ultrasonication affected the kinetics of glass dissolution. Samples with erosion had 2-3 × more dissolution compared to samples without erosion. The change in dissolution was thought to be partly caused by an increase in the surface area of the sample to volume of solution (SA/V) ratio due to the roughening of the surface and release of particulates and a reduction in the size of the depleted layer due to erosion. Stereoscopic 3D reconstruction of eroded samples was used to calculate the increase in surface area due to erosion. Type 2 surface areas (exfoliation mixed with normal leaching) were roughly 3-6% greater while Type 3 surface areas (heavy roughening of surface) were roughly 29-35% greater than the surfaces areas from Type 1 surfaces (normal leaching).

SUBMITTER: Dillinger B

PROVIDER: S-EPMC9701792 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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The effects of ultrasonic cavitation on the dissolution of lithium disilicate glass.

Dillinger Ben B Suchicital Carlos C Clark David D

Scientific reports 20221127 1

There has been little research conducted on how ultrasonic cavitation may affect glass dissolution. The focus of this study was to examine how the mechanisms and kinetics of glass dissolution may change in a system that included ultrasonication. Experiments were conducted on lithium disilicate glass in deionized water at 50 °C between 1 and 7.5 h. Results showed that the erosion from ultrasonication affected the kinetics of glass dissolution. Samples with erosion had 2-3 × more dissolution compa ...[more]

PMID: 36437286

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Project description:ObjectivesTo investigate the impact of simulated gastric acid on the surface properties of lithium disilicate-reinforced glass-ceramics and zirconia-reinforced lithium silicate glass-ceramic after certain polishing and glazing procedures.Materials and methodsFour different types of square-shaped specimens (10 × 10 × 2 mm3, n = 13) were manufactured: lithium disilicate-reinforced glass-ceramic milled and polished (LDS-P); milled, polished, and glazed (LDS-PG); milled, glazed, and no polishing (LDS-G); and milled and polished zirconia-reinforced lithium silicate glass-ceramic (ZR-LS). Specimens were immersed in hydrochloride acid (HCl 0.06 M, pH 1.2) to simulate gastric acid irritation and stored in the acid for 96 h in 37 °C. Specimen weight, surface gloss, Vickers surface microhardness and surface roughness (Ra, Rq, with optical profilometer), and surface roughness on nanometer level (Sq, Sal, Sq/Sal, Sdr, Sds with atomic force microscope) were measured before and after the acid immersion.ResultsZR-LS specimens lost significantly more weight after acid immersion (p = 0.001), also surface microhardness of ZR-LS was significantly reduced (p = 0.001). LDS-G and LDS-PG showed significantly lower surface roughness (Sa, Sq) values compared to LDS-P before (p ≤ 0.99) and after (p ≤ 0.99) acid immersion and ZR-LS after acid immersion (p ≤ 0.99).ConclusionsGastric acid challenge affects the surface properties of lithium disilicate-reinforced glass-ceramic and zirconia-reinforced lithium silicate glass-ceramic. Glazing layer provides lower surface roughness, and the glazed surface tends to smoothen after the gastric acid challenge.Clinical relevanceSurface finish of lithium disilicate-reinforced glass-ceramic and zirconia-reinforced lithium silicate glass-ceramic has a clear impact on material's surface properties. Gastric acidic challenge changes surface properties but glazing seems to function as a protective barrier. Nevertheless, also glazing tends to smoothen after heavy gastric acid challenge. Glazing can be highly recommended to all glass-ceramic restorations but especially in patients with gastroesophageal reflux disease (GERD) and eating disorders like bulimia nervosa.

Dataset Information

The effects of ultrasonic cavitation on the dissolution of lithium disilicate glass.

Publications

The effects of ultrasonic cavitation on the dissolution of lithium disilicate glass.

Similar Datasets

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