Fluid flow after resin-composite restoration in extracted carious teeth.
The aim of this study was to investigate fluid flow in dentin after restoration of carious teeth with resin composite bonded with a total-etching adhesive, with or without glass-ionomer cement lining. The roots of extracted third molars were removed and the crowns were connected to a fluid flow-measuring device. Each carious lesion was stained with caries detector dye and caries was removed using slow-speed burs and spoon excavators. Caries-excavated teeth were divided into two groups for restoration with resin composite bonded with a total-etch adhesive: (i) without lining; and (ii) lined with glass-ionomer cement before bonding. In non-carious teeth, cavities of similar dimensions were prepared, divided into two groups, and restored in the same manner. Fluid flow was recorded, after restoration, for up to 1 month. Caries-affected dentin was examined by scanning electron microscopy (SEM), and the bonded interfaces were observed using a confocal laser scanning microscope. No significant difference in fluid flow was observed between the two restorative procedures or between the carious and non-carious groups. The SEM images showed that the dentinal tubules of acid-etched, caries-affected dentin were usually still occluded, while some were patent. Limited penetration of fluorescent dye into dentin and into the bonded interfaces of restored carious teeth was observed.
Banomyong
Danuchit
D
Melbourne Dental School, The University of Melbourne, Melbourne, Victoria, Australia.
Palamara
Joseph E A
JE
Messer
Harold H
HH
Burrow
Michael F
MF
D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003731:Dental Caries / Q000378:metabolism / Q000628:therapy*; D003736:Dental Cavity Lining; D003737:Dental Cavity Preparation / Q000379:methods; D003738:Dental Cements / Q000737:chemistry; D003764:Dental Materials / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin / Q000648:ultrastructure; D003806:Dentin Permeability; D017220:Dentin-Bonding Agents / Q000737:chemistry; D019234:Dentinal Fluid / Q000378:metabolism*; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D012235:Rhodamines; D013997:Time Factors; D055815:Young Adult
D003188:Composite Resins; D003738:Dental Cements; D003764:Dental Materials; D017220:Dentin-Bonding Agents; C474035:Filtek Supreme; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements; D012235:Rhodamines; C115612:single bond; C084541:Fuji glass-ionomer lining cement; D017438:Bisphenol A-Glycidyl Methacrylate; C029773:rhodamine B