title: Marginal adaptation of compomer Class V restorations in vitro.
abstract: OBJECTIVE
  The purpose of this in vitro study was to determine the marginal adaptation of different adhesives, including recently developed self-etching primers, in combination with compomers in Class V cavities.
  
  
  METHODS
  In 80 extracted human teeth, divided into 10 groups of 8, Class V cavities were prepared (ca. 4 mm high, 3 mm wide, and 1.5 mm deep) with one half of the margin length in dentin. The one-bottle adhesives Prime & Bond 2.1, Syntac SC, and Espe OSB, and the self-etching primers Rasant F 2000 and Prompt L Pop were used in combination with compomers. Before and after thermocycling (TC), replicas were taken and a quantitative margin analysis using the SEM was performed at a magnification of 200x using defined criteria.
  
  
  RESULTS
  The statistical analysis using Kruskal-Wallis and Bonferroni tests showed a significantly (p < 0.05) better marginal adaptation in enamel and dentin for the self-etching primers, and when the one-bottle adhesives were used in combination with the total-etch technique.
  
  
  CONCLUSIONS
  Self-etching primers improve the marginal adaptation of compomer restorations in enamel.
authors.affiliation: Dept. of Operative Dentistry, Preventive Dentistry, and Endodontics, School of Dental Medicine, Humboldt University Berlin (Charité), Augustenburger Platz 1, D-13353 Berlin, Germany. ublunck@charite.de
authors.forename: U
authors.initials: U
authors.lastname: Blunck
authors.forename: J F
authors.initials: JF
authors.lastname: Roulet
mesh_terms: D020770:Compomers; D001840:Dental Bonding / Q000379:methods*; D003743:Dental Enamel / Q000648:ultrastructure; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent / Q000379:methods; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D018709:Statistics, Nonparametric
chemical_list: D020770:Compomers; D017220:Dentin-Bonding Agents