Lee, Jian Sheng and Chan, Wen Ni and Yahya, Noor Azlin and Omar, Ros Anita (2021) Effect of resin coating on surface roughness and microhardness of high viscous glass ionomer cements. Archives of Orofacial Sciences, 16 (2). pp. 209-221. ISSN 1823-8602, DOI https://doi.org/10.21315/aos2021.16.2.11.
Full text not available from this repository.Abstract
High viscous glass ionomer cement (HVGIC) was recently developed for atraumatic restorative treatment (ART). However, its moisture sensitivity remains a limitation thus protective coatingapplication is recommended. This study investigated the effect of resin coating on the surface roughnessand microhardness of two HVGICs (Riva Self Cure HVGIC RV and Equia® Forte Fil EQ)conditioned in food-simulating liquids (FSLs). Fifty standard disc-shaped samples were fabricated usingcustomised stainless-steel mould (10 × 2 mm). Coating was applied on top surface of all samples andsubsequently divided into five groups: air (control), distilled water, 0.02 N citric acid, heptane and 50%ethanol-water solution. The samples were conditioned in FSLs at 37°C for seven days. Subsequently,the surface roughness and microhardness of samples were measured using optical profilometry andmicrohardness tester, respectively. SEM analysis was done for qualitative observation of surfacemorphological changes. Data were analysed using one-way ANOVA, two-way ANOVA and posthocTukey’s test (α = 0.05). Interestingly, the results revealed that surface roughness was significantlyinfluenced by FSLs immersion, presence of coating and the materials itself (p < 0.001). The lowestsurface roughness was found on control coated samples: RV (50.98±4.25) nm and EQ (62.77±3.92)nm, while the highest values seen on uncoated surfaces in citric acid: RV (505.26±31.10) nm and EQ(350.33±15.36) nm. RV samples had the lowest microhardness of 54.97±2.48 Vickers hardness number(VHN) post-immersion in citric acid. In conclusion, with the exception of RV conditioned in heptaneand ethanol, the uncoated HVGICs generally had higher surface roughness than the coated HVGICs.HVGICs conditioned in citric acid showed the most significant increase in surface roughness andreduction in microhardness © Penerbit Universiti Sains Malaysia. 2021 This work is licensed under the terms of the Creative Commons Attribution (CC BY) (http://creativecommons.org/licenses/by/4.0/)
| Item Type: | Article |
|---|---|
| Funders: | SDI Bayswater, Australia |
| Uncontrolled Keywords: | Food-simulating liquids;High viscous glass ionomer cements;Microhardness;Surface roughness |
| Subjects: | R Medicine > RK Dentistry R Medicine > RK Dentistry > Oral surger |
| Divisions: | Faculty of Dentistry |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 02 Nov 2022 02:18 |
| Last Modified: | 02 Nov 2022 02:18 |
| URI: | http://eprints.um.edu.my/id/eprint/36158 |
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