title: Use of a compomer in Class V restoration: a microleakage study.
abstract: OBJECTIVE
  The purpose of this investigation was to evaluate the microleakage of Class V lesions restored with a compomer material (Dyractflow) using 2 single-bottle bonding systems.
  
  
  METHODS
  Sixty-four Class V cavity preparations were made on 32 sound, extracted human premolars, 1 preparation on the facial surface and 1 on the lingual surface. Teeth were then randomly divided into 2 groups. Group 1, which served as the control group, was restored as follows: group 1a, facial surface with PQ1 single-bottle bonding system plus TPH resin composite; group 1b, lingual surface with Prime & Bond NT single-bottle bonding system plus TPH. Group 2 was restored as follows: group 2a, facial surface with PQ1 plus Dyractflow compomer material; group 2b, lingual surface with Prime & Bond NT plus Dyractflow. After 24 hours of storage in water and subsequent thermocycling, each specimen was immersed in 0.2% basic fuchsin dye for 24 hours. The teeth were sectioned longitudinally and horizontally, and dye penetration at enamel and cementum margins was viewed at x30 magnification by 2 independently calibrated evaluators. Specimens were evaluated as either having leaked or not having leaked.
  
  
  RESULTS
  No statistically significant differences in microleakage were noted between group 1 and group 2 specimens.
  
  
  CONCLUSIONS
  Both single-bottle bonding systems, PQ1 and Prime & Bond NT, demonstrated equal effectiveness in reducing microleakage beneath compomer and composite restorations.
authors.affiliation: Advanced Education Program in Prosthodontics, Division of Restorative and Prosthetic Sciences, New York University, College of Dentistry, 345 East 24th Street, New York, New York 10010, USA. fft1@is4.nyu.edu
authors.forename: F F
authors.initials: FF
authors.lastname: Tung
authors.forename: D
authors.initials: D
authors.lastname: Estafan
authors.forename: W
authors.initials: W
authors.lastname: Scherer
mesh_terms: D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D004396:Coloring Agents; D020770:Compomers / Q000737:chemistry*; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods; D003737:Dental Cavity Preparation / Q000145:classification; D003739:Dental Cementum / Q000648:ultrastructure; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification*; D003793:Dental Restoration, Permanent / Q000145:classification* / Q000379:methods; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D012394:Rosaniline Dyes; D017640:Silicates / Q000737:chemistry; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D020770:Compomers; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C088486:Dyract; D008689:Methacrylates; C119199:PermaQuik; D011109:Polymethacrylic Acids; C103500:Prime & Bond; D012394:Rosaniline Dyes; D017640:Silicates; C113300:TPH hybrid; D014867:Water; D017438:Bisphenol A-Glycidyl Methacrylate; C025485:basic fuchsin