title: The effect of a nano-filled resin coating on the 3-year clinical performance of a conventional high-viscosity glass-ionomer cement.
abstract: OBJECTIVE
  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.
  
  
  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.
  
  
  CONCLUSIONS
  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.
  
  
  CONCLUSIONS
  The application of G-Coat Plus to Fuji IX GP Extra glass-ionomer cement may be beneficial in reducing wear in occlusal cavities.
authors.affiliation: National Hospital of Odontostomatology in Ho Chi Minh City, Ho Chi Minh City, Viet Nam.
authors.forename: Vu Thi Kieu
authors.initials: VT
authors.lastname: Diem
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Tyas
authors.forename: Hien C
authors.initials: HC
authors.lastname: Ngo
authors.forename: Lam Hoai
authors.initials: LH
authors.lastname: Phuong
authors.forename: Ngo Dong
authors.initials: ND
authors.lastname: Khanh
mesh_terms: D003188:Composite Resins; D005899:Glass Ionomer Cements; D008422:Materials Testing; D036103:Nanotechnology; D014783:Viscosity
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements