title: Comparative evaluation of secondary caries formation around light-cured fluoride-releasing restorative materials.
abstract: OBJECTIVE
  The aim of this study was to compare and evaluate secondary caries formation around light-cured fluoride-releasing restorative materials.
  
  
  METHODS
  Standard Class V cavities were prepared on the buccal and lingual surfaces of forty extracted healthy premolars. The teeth were randomly divided into four groups of ten teeth each and labeled as Group I, II, III, and IV and restored with one of the following materials, namely, Fuji II LC (Group I), Vitremer (Group II), F-2000 (Group III), and Z-100 (Group IV; Control). The teeth were thermocycled and immersed in jars containing an acid gel for caries-like lesion formation. After 15 weeks, the samples were removed, washed, and sectioned buccolingually through the restoration. The sections were then grounded to a thickness of 80-100 µm. After imbibition in water, the sections were mounted on slides and lesions were examined, measured, and photographed with Leica DMRB Research Microscope. The observation recorded was subjected to (a) analysis of variance, (b) Studentized range test (Newman-Keuls), (c) Snedecor's F-test.
  
  
  RESULTS
  The depth of the outer lesion in teeth restored with Z-100 (Group IV; Control) was significantly higher than the teeth restored with F-2000 (Group III), Vitremer (Group II), and Fuji II LC (Group I) (P < 0.01). The depth of the outer lesion in teeth restored with F-2000 (Group III) was also significantly higher than the teeth restored with Vitremer (Group II) and Fuji II LC (Group I) (P < 0.01). However, there was no significant difference in depth of the outer lesions among the teeth restored with Vitremer (Group II) and Fuji II LC (Group I). No wall lesion (WL) was evident in teeth restored with Vitremer (Group II) and Fuji II LC (Group I). The WL length and body depth in teeth restored with Z-100 (Group IV; Control) were significantly higher than the teeth restored with F-2000 (Group III) (P < 0.01).
  
  
  CONCLUSIONS
  It was concluded that Fuji II LC and Vitremer had a inhibitory effect on the development of WL and OL depth. Even though F- 2000 was not fully effective in preventing the development of WL, there was significant reduction in WL and depth when compared to Z-100.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India.
authors.forename: N Sathyajith
authors.initials: NS
authors.lastname: Naik
authors.affiliation: Department of Pedodontics and Preventive Dentistry, College of Dental Sciences, Davangere, Karnataka, India.
authors.forename: V V
authors.initials: VV
authors.lastname: Subba Reddy
authors.affiliation: Department of Pedodontics and Preventive Dentistry, School of Dental Sciences, Krishna Institute of Medical Sciences, Karad, Maharashtra, India.
authors.forename: N D
authors.initials: ND
authors.lastname: Shashikiran
mesh_terms: D001641:Bicuspid; D003188:Composite Resins / Q000737:chemistry / Q000494:pharmacology*; D003731:Dental Caries / Q000139:chemically induced / Q000517:prevention & control*; D003793:Dental Restoration, Permanent; D005459:Fluorides / Q000008:administration & dosage*; D005899:Glass Ionomer Cements / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D011897:Random Allocation; D012117:Resins, Synthetic / Q000494:pharmacology; D012822:Silicon Dioxide / Q000494:pharmacology; D015040:Zirconium / Q000494:pharmacology
chemical_list: D003188:Composite Resins; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D012117:Resins, Synthetic; C084550:Vitremer; C083568:Z100 composite resin; D012822:Silicon Dioxide; D015040:Zirconium; D005459:Fluorides