Abstract
Objectives
The main aim of the study was to compare the clinical performance of the conventional high-powder/liquid ratio glass-ionomer cement (GIC) Fuji IX GP Extra (F IX), Fuji IX GP Extra with a low-viscosity nano-filled resin coating, G-Coat Plus (F IX+GCP), and a resin composite, Solare (S), as a comparison material.
Materials and methods
Moderate-depth occlusal cavities in the first permanent molars of 91 11–12-year-old children (1–4 restorations per child) were restored with either F IX (87 restorations), F IX+GCP (84 restorations) or S (83 restorations). Direct clinical assessment, photographic assessment and assessment of stone casts of the restorations were carried out at 6 months, 1 year, 2 years and 3 years.
Results
The colour match with the tooth of the GIC restorations improved over the 3 years of the study. Marginal staining and marginal adaptation were minimal for all restorations; three restorations exhibited secondary caries at 3 years. From the assessment of the casts, at 2 years, there was significantly less wear of the F IX GP Extra+GCP restorations than the F IX GP Extra restorations (P < 0.005). At 3 years, approximately 37 % of F IX GP Extra restorations showed wear slightly more than the adjacent enamel, compared to 28 % of F IX GP Extra+GCP restorations and 21 % of Solare restorations. Although this was not statistically significant, there was a trend that GCP can protect F IX GP Extra against wear.
Conclusion
Although both Fuji IX GP Extra and Fuji IX GP Extra with G-Coat Plus showed acceptable clinical performance in occlusal cavities in children, the application of G-Coat Plus gave some protection against wear.
Clinical relevance
The application of G-Coat Plus to Fuji IX GP Extra glass-ionomer cement may be beneficial in reducing wear in occlusal cavities.
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Acknowledgments
The authors wish to acknowledge the financial support of GC Corporation, Tokyo, Japan, and the assistance of Dr Vo Dinh Hung of the GC Company in Ho Chi Minh City for the logistic support. The considerable clinical support of the staff of the Hospital of Odontostomatology, Ho Chi Minh City, is gratefully acknowledged. We are grateful for the participation of the children of Tan Nhut Primary School and the excellent cooperation of the Headmaster.
Conflict of interest
The authors disclose that they do not have a financial relationship with GC Corporation, Tokyo, Japan, other than providing funding for research.
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Diem, V.T.K., Tyas, M.J., Ngo, H.C. et al. The effect of a nano-filled resin coating on the 3-year clinical performance of a conventional high-viscosity glass-ionomer cement. Clin Oral Invest 18, 753–759 (2014). https://doi.org/10.1007/s00784-013-1026-z
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DOI: https://doi.org/10.1007/s00784-013-1026-z