title: Effect of different intermediary bases on microleakage of a restorative material in Class II box cavities of primary teeth.
abstract: BACKGROUND
  The aim of this in vitro study was to assess and compare the effect of different intermediary bases on microleakage between tooth and a nanocomposite interface in Class II box cavities in primary teeth.
  
  
  METHODS
  Standard Class II box cavities were prepared in 52 primary molars and randomly divided into 9 groups according to the intermediary base used (Multicore Flow, Fuji II LC, SDR, Smart Dentin Replacement, and Biodentine). All specimens were subjected to thermocycling and prepared for microleakage testing and evaluation.
  
  
  RESULTS
  There was significant difference in the mean ranks of microleakage between the 9 groups, which was observed in the gingival side (p<0.0001) and the occlusal side (p<0.0001). The mean ranks microleakage was significantly higher with experimental SDR, experimental Multicore Flow, and positive control materials when compared with the other 6 groups. The microleakage mean ranks were statistically significantly lower in experimental Fuji II LC, experimental Biodentine, and all negative control groups when compared with the other 3 groups.
  
  
  CONCLUSIONS
  Microleakage is affected by the application of intermediate material. Experimental Biodentine and Fuji II LC showed the lowest microleakage while experimental SDR and experimental Multicore Flow showed the highest microleakage.
authors.affiliation: Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh - Kingdom of Saudi Arabia.
authors.forename: Faika Y
authors.initials: FY
authors.lastname: Abdelmegid
authors.affiliation: Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh - Kingdom of Saudi Arabia.
authors.forename: Fouad S
authors.initials: FS
authors.lastname: Salama
authors.affiliation: College of Dentistry, King Saud University Riyadh - Kingdom of Saudi Arabia.
authors.forename: Waleed M
authors.initials: WM
authors.lastname: Al-Mutairi
authors.affiliation: College of Dentistry, King Saud University Riyadh - Kingdom of Saudi Arabia.
authors.forename: Saud K
authors.initials: SK
authors.lastname: Al-Mutairi
authors.affiliation: College of Dentistry, King Saud University Riyadh - Kingdom of Saudi Arabia.
authors.forename: Sultan O
authors.initials: SO
authors.lastname: Baghazal
mesh_terms: D017610:Calcium Compounds; D003188:Composite Resins; D003763:Dental Leakage; D003764:Dental Materials; D003793:Dental Restoration, Permanent / Q000379:methods*; D005899:Glass Ionomer Cements; D006801:Humans; D008689:Methacrylates; D012117:Resins, Synthetic; D017640:Silicates; D014094:Tooth, Deciduous
chemical_list: D017610:Calcium Compounds; D003188:Composite Resins; D003764:Dental Materials; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; C509715:MultiCore Flow; D012117:Resins, Synthetic; D017640:Silicates; C506393:tricalcium silicate