Effect of the application of dentin primers and a dentin bonding agent on the adhesion between the resin-modified glass-ionomer cement and dentin.
OBJECTIVE
This study was designed to evaluate the influence of the application of dentin primer and/or dentin bonding agent on the adhesion of a resin-modified glass-ionomer cement to dentin.


METHODS
Bovine dentin was pretreated with Dentin Conditioner or EDTA 3-2 solution, primed by an experimental dentin primer, and applied with a dentin bonding agent. A resin-modified glass-ionomer cement, Fuji II LC, was then adhered to the dentin. The tensile bond strength between the light-cured glass-ionomer cement and the pretreated dentin was measured. The components of the experimental dentin primers were 2-hydroxyethyl methacrylate (HEMA), glyceryl methacrylate (GM) and a water-soluble photo-polymerization initiator, 2-hydroxy-3-(3,4-dimethyl-9-oxo-9H-thioxanthen-2-yloxy)-N,N, N-trimethyl-1- propanaminium chloride (OTX). Significant differences in the data were examined by an analysis of variance and Scheffe's test for multiple comparisons between the means at p = 0.05.


RESULTS
A significantly higher mean bond strength between the Fuji II LC and dentin was obtained by EDTA 3-2 pretreatment, QTX/GM priming, and LB Bond application. This value was comparable with that obtained with the resin composite system. Scanning electron microscopy observation showed the formation of a hybrid layer with a thickness of 1-1.5 microns.


CONCLUSIONS
The data obtained in this investigation suggest that the adhesion of Fuji II LC to dentin is closer to that provided by a resin composite system than to that of conventional glass-ionomer cements.
Nakanuma
K
K
Department of Endodontics, Nihon University School of Dentistry at Matsudo, Chiba, Japan. nakanuma@mascat.nihon-u.ac.jp
Hayakawa
T
T
Tomita
T
T
Yamazaki
M
M
D000268:Adhesiveness; D000818:Animals; D002417:Cattle; D003188:Composite Resins; D001840:Dental Bonding / Q000379:methods*; D003804:Dentin / Q000737:chemistry; D017220:Dentin-Bonding Agents; D004492:Edetic Acid; D005899:Glass Ionomer Cements / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D012117:Resins, Synthetic; D013718:Tensile Strength
C084544:Clearfil Linerbond System; D003188:Composite Resins; D017220:Dentin-Bonding Agents; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D008689:Methacrylates; D012117:Resins, Synthetic; D004492:Edetic Acid