Bond durability of resin cements to Au-Pd-Ag alloy under cyclic impact load.
The bond durability of resin cements to a 12% Au-Pd-Ag alloy was studied through cyclic impact tests with different loads. A piece of casting alloy was bonded to a cast block with two types of resin cements, Super Bond C&B and Bistite II. A shear load was applied onto a small piece of alloy until debonding of the specimen, using different weights of plungers, 130 g, 230 g, 330 g and 430 g. The specimen bonded with Super Bond exhibited a higher resistance than that with Bistite II. The fracture modes of the debonded cements were completely different from each other. That is, Bistite II showed a bulk fracture of cement by the crack penetrating through the cement layer. On the other hand, Super Bond showed damages limited to the surface and no bulk fracture. The mode of fracture was dependent not on the loading weight but the types of resin cements used.
Ohsawa
Masahiro
M
Nagasaki University, Graduate School of Biomedical Science, Department of Developmental and Reconstructive Medicine, Division of Cariology, Sakamoto, Nagasaki City, Nagasaki, Japan. ohsawa@net.nagasaki-u.ac.jp
Yokota
Hiroaki
H
Yoshihiko
Hayashi
H
D000704:Analysis of Variance; D001896:Boron Compounds; D003188:Composite Resins; D001840:Dental Bonding; D003799:Dental Stress Analysis; D006047:Gold Alloys; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D010165:Palladium; D028502:Polygonum; D019279:Resin Cements; D033081:Shear Strength; D012834:Silver
C096475:Bistite Resin Cement; D001896:Boron Compounds; D003188:Composite Resins; D006047:Gold Alloys; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D012834:Silver; D010165:Palladium; C049495:Super-bond