Effect of single-liquid acidic primers on bonding of a composite luting agent joined to a prefabricated alumina coping material.
OBJECTIVE
The aim of this study was to assess the effect of acidic primers on adhesive bonding to prefabricated alumina material designed for fixed restorations.


METHODS
High-purity alumina disks (Procera AllCeram) were primed with one of the following materials: Acryl Bond, All Bond II Primer B, Alloy Primer, Estenia Opaque Primer, M.L. Primer, MR. Bond, and Super- Bond Liquid. The specimens were bonded with a dualpolymerizing luting composite (Variolink II). Unprimed specimen was prepared as the control. Bond strengths were determined both before and after thermocycling.


RESULTS
Average bond strength before thermocycling ranged from 12.0 to 39.1 MPa, whereas average bond strength after thermocycling varied from 0.0 to 26.9 MPa. The statistically highest post-thermocycling bond strength was obtained with the use of the Alloy Primer, Estenia Opaque Primer, and M.L. Primer agents.


CONCLUSIONS
It can be concluded that the use of either the Estenia or Alloy Primer material, which contain 10- methacryloyloxydecyl dihydrogen phosphate (MDP), or the M.L. Primer, which contains 6-methacryloyloxyhexyl phosphonoacetate (6-MHPA), is recommended for bonding the Procera alumina copings with the Variolink II composite.
Yamada
Kazuya
K
Nihon University Graduate School of Dentistry, Department of Fixed Prosthodontics, Tokyo, Japan. koizumi@dent.nihon-u.ac.jp
Koizumi
Hiroyasu
H
Ishikawa
Yumi
Y
Matsumura
Hideo
H
D000180:Acrylic Resins; D000537:Aluminum Oxide; D003188:Composite Resins; D001840:Dental Bonding; D003764:Dental Materials; D008422:Materials Testing; D008689:Methacrylates; D010746:Phosphonoacetic Acid; D011140:Polyurethanes
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003764:Dental Materials; D008689:Methacrylates; D011140:Polyurethanes; C069749:methacryloyloxydecyl dihydrogen phosphate; D000537:Aluminum Oxide; D010746:Phosphonoacetic Acid