Microperoxidase primer promotes adhesion of butylborane-polymerized resin to dentin.
The purpose of this study was to investigate the effect of dentin primers containing microperoxidase (MP-11) with 2-hydroxyethyl methacrylate (HEMA) on the bond strength between a tri-n-butylborane-initiated self-polymerizing resin and dentin. Bovine dentin surfaces were etched with 10 wt % phosphoric acid, primed, and then bonded with stainless steel rods. Tensile bond strength after 24 h of storage in water was significantly influenced by both MP-11 and HEMA. Groups with no MP-11 showed the lowest values. Without HEMA, the bond strengths of groups using 0.01, 0.1, and 1.0 micromol/g MP-11 were statistically identical, and also greater than that of the no MP-11 control. In the presence of HEMA, the bond strength was significantly enhanced with an increasing concentration of MP-11. The highest bond strength of 29.0 MPa was obtained with aqueous HEMA primer, containing 1.0 micromol/g MP-11. Microscopic observation showed the formation of a hybrid layer at the bonded interface. Polymerization of the resin was significantly accelerated with the MP-11 primer. In conclusion, MP-11 has a potential for adhesive bonding promoter between the resin and the demineralized dentin surface.
Taira
Yohsuke
Y
Division of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. yohsuke@net.nagasaki-u.ac.jp
Soeno
Kohyoh
K
Atsuta
Mitsuru
M
D000269:Adhesives / Q000737:chemistry*; D000818:Animals; D001896:Boron Compounds / Q000737:chemistry*; D002417:Cattle; D003738:Dental Cements / Q000737:chemistry*; D003804:Dentin / Q000737:chemistry*; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D010544:Peroxidases / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D013718:Tensile Strength
D000269:Adhesives; D001896:Boron Compounds; D003738:Dental Cements; D008689:Methacrylates; D011108:Polymers; D019279:Resin Cements; C009523:tri-n-butylborane; C005044:hydroxyethyl methacrylate; D010544:Peroxidases; C021799:microperoxidase