The adaptation and cavity sealing ability of compomer restorative materials.
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).
Sidhu
Sharanbir K
SK
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
McCabe
John F
JF
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
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