The effect of petroleum jelly, light-cured varnish and different storage media on the flexural strength of glass ionomer dental cements
| Autor: | Kristina Goršeta, Beata Czarnecka, Domagoj Glavina, John W. Nicholson, Tomislav Škrinjarić |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Materials science Varnish Glass ionomer cement engineering.material medicine.disease_cause coating flexural strength glass-ionomer Article Coating 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Flexural strength Dental cement Mold medicine General Materials Science Composite material 030206 dentistry Ketac-Molar Aplicap Lactic acid lcsh:RK1-715 030104 developmental biology chemistry lcsh:Dentistry visual_art visual_art.visual_art_medium engineering Original Article |
| Zdroj: | Acta Biomaterialia Odontologica Scandinavica, Vol 2, Iss 1, Pp 55-59 (2016) Acta Biomaterialia Odontologica Scandinavica |
| ISSN: | 2333-7931 |
| DOI: | 10.3109/23337931.2016.1160784 |
| Popis: | This study determined the influence of coating with either petroleum jelly or light-cured varnish and storage medium on the flexural strength of glass-ionomer cements (GIC). The flexural strength of two glass-ionomer cements (Fuji Equia Fil and Ketac Molar Aplicap) was measured. Specimens (2 × 2 × 25 mm) were prepared in three groups: uncoated, coated with petroleum jelly, or coated with light-cured varnish (EquiaCoat) cured for 20 s using a cure lamp (Bluephase G2, Ivoclar Vivadent, Schaan, Liechtenstein). Specimens were stored for 1 week at 37 °C in water, artificial saliva or 20 mmol dm− 3 lactic acid, then flexural strength was determined in 3-pont bend. Data were analyzed by ANOVA and Tukey HSD post hoc test (p < 0.05). In addition, the mold was filled with water and the temperature change caused by the cure lamp was measured with a thermocouple. For both materials, storage in water gave the lowest flexural strength. It was slightly higher in either saliva or lactic acid, and was improved by coating in petroleum jelly. Specimens coated with light-cured varnish, that also involved heating with a cure lamp, gave the highest flexural strength. The heating effect of the lamp was demonstrated by the temperature rise in the water in the mold after light exposure from 21.9 (± 1.0) °C to 26.8 (± 1.0) °C. hence, sealing of GIC from aqueous media improves flexural strength. The cure lamp emitted heat, which may enhance the flexural strength of specimens coated with light-cured varnish. |
| Databáze: | OpenAIRE |
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