Apical and coronal seal of roots obturated with a dentine bonding agent and resin.
The efficacy of sealing root canal systems with a dentine bonding agent and resin cement was compared with that of a glass ionomer sealer. Scanning electron microscopic examination of the bonding agent-dentine interface was also performed. The root canals of 50 single rooted teeth with mature apices were prepared chemomechanically and the smear layer removed with 17% REDTA and 5.25% NaOCl. Specimens were divided into two groups of 24 teeth each. One group had the dentine conditioned with a 10:3 citric acid-ferric chloride solution and obturated with the dentine bonding agent and resin, radiopaque C & B Metabond. The other group was obturated with the glass ionomer sealer, Ketac-Endo and a single cone of gutta-percha. After immersion in Indian ink for 90 h, the teeth were cleared and the quality of the apical and coronal seal was assessed using India ink dye penetration. There was a significantly better seal in both the apical and coronal directions when using the dentine bonding agent and resin obturation material. Scanning electron microscopic examination of the demineralized dentine and the C & B Metabond interface revealed the presence of the characteristic hybrid layer along with microtags of resin penetrating deep into the dentine tubules.
Leonard
J E
JE
Department of Restorative Sciences, Baylor College of Dentistry, Dallas, Texas 75246, USA.
Gutmann
J L
JL
Guo
I Y
IY
D001896:Boron Compounds; D003763:Dental Leakage; D003804:Dentin / Q000648:ultrastructure; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006171:Gutta-Percha; D006801:Humans; D008689:Methacrylates; D008768:Methylmethacrylates; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D018709:Statistics, Nonparametric
D001896:Boron Compounds; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; C074934:Ketac Endo; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D012387:Root Canal Filling Materials; C034139:4-methacryloxyethyltrimellitic acid anhydride; D006171:Gutta-Percha; C049495:Super-bond