title: Microleakage of Class II resin-based composite restorations with flowable composite in the proximal box.
abstract: OBJECTIVE
  To compare microleakage of Class II hybrid resin-based composite (RBC) restorations with and without low viscosity (flowable) RBC in the proximal box.
  
  
  METHODS
  Conservative Class II cavity preparations were made in 50 extracted premolars randomly assigned to five groups (n = 10). OptiBond FL dentin bonding agent, and Prodigy hybrid RBC were used to restore all cavity preparations. Preparations in four of the five groups were restored with flowable RBC as the initial increment in the proximal box. The four flowable RBCs tested were: AEliteFlo, Revolution, UltraSeal XT and Flow-It. In the control group, the entire preparation was restored only with hybrid RBC. Specimens were stored in water at 37 degrees C for 24 hrs after restoration, thermocycled 1,000x, immersed in 2% basic fuchsin, sectioned and evaluated for microleakage. Microleakage was scored on a 0-4 scale.
  
  
  RESULTS
  Non-parametric Kruskal-Wallis one-way ANOVA followed by Wilcoxon signed ranks test was used for statistical analysis. The use of any of the four flowable RBCs tested did not influence microleakage significantly (P > 0.05) in Class II RBC restorations.
authors.affiliation: Department of Restorative Dentistry, SIU School of Dental Medicine, Alton, IL 62002, USA. pjain@siue.edu
authors.forename: P
authors.initials: P
authors.lastname: Jain
authors.forename: M
authors.initials: M
authors.lastname: Belcher
mesh_terms: D000704:Analysis of Variance; D017609:Barium Compounds / Q000737:chemistry; D001641:Bicuspid; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry*; D003737:Dental Cavity Preparation / Q000145:classification; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent / Q000145:classification*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D007101:Immersion; D010895:Pit and Fissure Sealants / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012394:Rosaniline Dyes; D012822:Silicon Dioxide / Q000737:chemistry; D018709:Statistics, Nonparametric; D013696:Temperature; D013816:Thermodynamics; D013997:Time Factors; D014783:Viscosity
chemical_list: C121035:Aeliteflo; D017609:Barium Compounds; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C092987:Optibond; D010895:Pit and Fissure Sealants; C099128:Prodigy; D019279:Resin Cements; C102735:Revolution (composite resin); D012394:Rosaniline Dyes; C106663:Ultra Seal XT; C111840:flowable hybrid composite; D017438:Bisphenol A-Glycidyl Methacrylate; C025485:basic fuchsin; D012822:Silicon Dioxide