Adhesive primers for bonding cobalt-chromium alloy to resin.
This study evaluated the effect of five adhesive primers on the shear bond strength of a self-curing resin to cobalt-chromium (Co-Cr) alloy. The adhesive primers Acryl Bond (AB, Shofu), Cesead Opaque Primer (COP, Kuraray), Metacolor Opaque Bonding Liner (MOBL, Sun-Medical), Metal PrimerII (MPII, GC) and MR. Bond (MRB, Tokuyama) were used. A brass ring which was placed over the casting alloy disk surface non-primed or primed with each primer was filled with the self-curing MMA-PMMA resin. The specimens were stored in water at 37 degrees C for 24 h and then immersed alternately in water baths at 4 C and 60 degrees C for 1 min each for up to 50000 thermal cycles before shear mode testing at a crosshead speed of 0.5 mm/min. All of the primers examined, except MOBL, improved the shear bond strength between the resin and Co-Cr alloy compared with nonprimed specimens prior to thermal cycling. Regardless of which primer was used, the shear bond strength significantly differed between thermal cycles 0 and 50000. However, after 50000 thermal cycles, the bond strengths of resin to Co-Cr alloy primed with COP or MPII were significantly greater than those of specimens primed with AB, MOBL or MRB and non-primed controls. This study indicated that COP and MPII are effective primers to obtain higher bond strength between resin and Co-Cr alloy.
Nagasaki University School of Dentistry, Japan. keiichi@net.nagasaki-u.ac.jp
K
K
Yoshida
K
K
Kamada
M
M
Atsuta
D000269:Adhesives / Q000737:chemistry; D000704:Analysis of Variance; D002858:Chromium Alloys / Q000737:chemistry; D003035:Cobalt; D001840:Dental Bonding / Q000379:methods*; D003738:Dental Cements / Q000737:chemistry*; D008422:Materials Testing; D020366:Methylmethacrylate / Q000737:chemistry; D018709:Statistics, Nonparametric; D013718:Tensile Strength
D000269:Adhesives; D002858:Chromium Alloys; D003738:Dental Cements; D020366:Methylmethacrylate; D003035:Cobalt