Diffusion of GM primer and dentin adhesive into EDTA-conditioned dentin.
The aim of this study was to investigate the diffusion of red-stained experimental GM primer and blue-stained dentin bonding agent into EDTA-conditioned dentin and the effect of GM priming on contraction gap formation. After GM priming at 0, 35, 70, or 100 vol%, marginal adaptation was evaluated by measuring the wall-to-wall contraction gap width of a light-activated resin composite (Palfique Estelite, Tokuyama Dental, Japan) mediated with a commercial dentin bonding agent (Clearfil Photo Bond, Kuraray Medical, Japan). Contraction gap formation was completely prevented when treated with 35 vol% GM primer. Moreover, after treatment with 35 vol% GM, the red and blue dyes of stained GM primer and dentin bonding agent diffused up to a depth of 40 µm into the dentin surface. The diffusion of primer and bonding agent into EDTA-conditioned dentin was essential for bonding efficacy although SEM observation revealed an absence of hybrid layer formation.
Nasu
Yuya
Y
Department of Clinical Cariology, Showa University, School of Dentistry, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan. ctani@dent.showa-u.ac.jp
Itoh
Kazuo
K
Tani
Chihiro
C
Hisamitsu
Hisashi
H
D000268:Adhesiveness; D002614:Chelating Agents / Q000737:chemistry*; D004396:Coloring Agents; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D018772:Dental Marginal Adaptation; D003804:Dentin / Q000648:ultrastructure*; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004058:Diffusion; D004492:Edetic Acid / Q000737:chemistry*; D005989:Glycerides / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D058105:Polymerization; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D013997:Time Factors
D002614:Chelating Agents; D004396:Coloring Agents; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D005989:Glycerides; D008689:Methacrylates; D019279:Resin Cements; C086113:palfique estelite; C074669:Clearfil Photo Bond; C069750:glyceryl methacrylate; D004492:Edetic Acid