title: The adaptation and cavity sealing ability of compomer restorative materials.
abstract: OBJECTIVE
  To examine the sealing ability of compomers, used in combination with dentin bonding agents, compared to other classes of tooth-colored materials.
  
  
  METHODS
  Thirty wedge-shaped cervical cavities were cut in extracted teeth, with the gingival cavosurface margin involving dentin. Five cavities each were restored with one of the following: the compomers Dyract AP/Prime & Bond NT, F2000 Compomer/Adhesive or Hytac Aplitip/Prompt L-Pop; a conventional glass-ionomer, Ketac Fil Aplicap; a resin-modified glass-ionomer, Fuji II LC Improved; or a resin-based composite, Z100 MP/Scotchbond 1. All teeth were restored, stored moist for 24 hours, then varnished (except the restorations) before thermocycling in rhodamine B dye solution for 1000 cycles (between baths of 6 degrees C and 60 degrees C). The teeth were sectioned longitudinally through the restorations before examination with a confocal microscope. A scale of 0 to 3 was used to score the dye leakage along the enamel margin as well as the gingival margin.
  
  
  RESULTS
  The results showed that at the enamel margin, all materials gave a median score of 0 except Z100 MP (median score 3). Leakage was noted at the gingival margin of all materials (median score of 3 except Dyract AP with a median score of 2).
authors.affiliation: Dept. of Restorative Dentistry, The Dental School, University of Newcastle, Framlington Place, Newcastle upon Tyne NE2 4BW, United Kingdom. S.K.Sidhu@ncl.ac.uk
authors.forename: Sharanbir K
authors.initials: SK
authors.lastname: Sidhu
authors.forename: John F
authors.initials: JF
authors.lastname: McCabe
mesh_terms: D020770:Compomers / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003763:Dental Leakage / Q000175:diagnosis; D018772:Dental Marginal Adaptation; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements; D006801:Humans; D008963:Molar; D044367:Phase Transition; D011109:Polymethacrylic Acids; D019279:Resin Cements; D012235:Rhodamines
chemical_list: D020770:Compomers; D003188:Composite Resins; C118368:F2000 cement; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements; D011109:Polymethacrylic Acids; C425843:Prime and Bond NT; C408584:Prompt L-Pop; D019279:Resin Cements; D012235:Rhodamines; C041330:Scotchbond; C029773:rhodamine B