Abstract
G-Coat Plus is a nano-filled, self-adhesive light cured protective coating that strengthens, protects and enhances glass ionomer restorations. The effect of G- Coat plus on different GICs have not been studied comprehensively. Hence the study was conducted to compare the effect of resin coating on surface hardness and Shear punch strength of newer modified GIC.Materials and methods: 120 samples of three GICs i.e. Fuji IX Extra, Fuji IX Fast, Fuji II LC were prepared using specialized metal moulds. Specimens of Fuji II LC were light cured for 20 seconds. Coated and uncoated samples were tested for surface hardness and 30 samples were tested for shear punch strength. P < 0.05 was considered as significant. Results: Shear Punch Strength after G-Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji II LC. Surface Hardness after G- Coat plus coating was significantly higher for Fuji IX Extra followed by Fuji IX Fast and Fuji II LC.Conclusion: Surface coating by a resin agent significantly increases the surface hardness and shear strength of the GIC. Considering the above stated findings, they can be incorporated into daily clinical practice to enhance the strength and longevity of GIC.
Highlights
During the last decades, there has been a surge in the variety of dental restorative materials such as gold, ceramic and amalgam
Whereas in Uncoated materials, mean Shear punch strength in Fuji II LC was significantly higher than Fuji IX Extra and Fuji IX Fast with no significant difference between Fuji IX Extra and Fuji IX Fast
When LSD post hoc test was applied it showed that mean Surface hardness in Fuji IX Extra was significantly higher than Fuji IX Fast and Fuji II LC
Summary
There has been a surge in the variety of dental restorative materials such as gold, ceramic and amalgam. Their limitations such as brittleness in case of ceramic, toxicity by mercury in amalgam have limited their extensive use. GIC was invented by Wilson and Kent in 1969 at the Laboratory of the Government Chemist in London, United Kingdom [2] These materials are used extensively in restorative dentistry largely due to their adhesive, toothcoloured, anti-cariogenic properties and their usefulness in variety of clinical situations as restorative, 'lining, luting and sealing; no other restorative material has such wide applications [3]. The Fuji IX Extra, Fuji IX Fast and Fuji II LC (GC Corporation, Tokyo, Japan)
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