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Year : 2020  |  Volume : 23  |  Issue : 5  |  Page : 720-728

How do the surface coating and one-year water aging affect the properties of fluoride-releasing restorative materials?

Department of Restorative Dentistry, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey

Correspondence Address:
Dr. M Ugurlu
Faculty of Dentistry, Süleyman Demirel University, East Campus, 32100, Isparta
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/njcp.njcp_591_19

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Objective: To evaluate the effects of surface coating and 1-year water aging on flexural strength, compressive strength (CS) and surface roughness of fluoride-releasing restorative materials. Materials and Methods: The specimens were prepared from seven materials: GCP Glass Fill (GCP), Amalgomer CR (AHL), Zirconomer (Shofu), Fuji IX GP Capsule (GC), Beautifil II (Shofu), Estelite Σ Quick (Tokuyama), and reliaFIL LC (AHL). The specimens were randomly divided into two groups for each test: surface coated with G-Coat Plus (GC) and uncoated. Each group was subdivided into two groups stored in distilled water at 37°C for 24 h and 1 year before testing (n = 10). The flexural and CS were evaluated according to ISO standards on a universal testing machine. The surface roughness was assessed with AFM. After flexural strength test, a cross-section of the coated specimens was evaluated with SEM. Data were analyzed with one-way analysis of variance, Duncan and independent t-tests (P = 0.05). Results: After 24 h, a significant increase was observed on the flexural and CS of Amalgomer CR, Zirconomer, and Fuji IX GP by coating (P < 0.05). After 1 year, the coating increased the flexural strength of Amalgomer CR and Zirconomer, and CS of GCP Glass Fill (P < 0.05). The coating decreased the surface roughness of GCP Glass Fill, Amalgomer CR, and Zirconomer after 1 year (P < 0.05). The water aging decreased the mechanical properties of glass ionomer-based materials and increased their surface roughness (P < 0.05). Conclusion: The mechanical properties and surface roughness of glass ionomer-based materials were affected by coating and water aging.

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