Adhesive performance of silver-palladium-copper-gold alloy and component metals bonded with organic sulfur-based priming agents and a tri-n-butylborane initiated luting material.
OBJECTIVE
The purpose of the current study was to evaluate the effect of thione-based metal priming agents on the adhesive behavior of a Ag-Pd-Cu-Au alloy and component metals bonded with an acrylic resin.


METHODS
Disk specimens (10 mm in diameter by 3 mm thick) were prepared from a silver-palladium-copper-gold (Ag-Pd-Cu-Au) alloy (Castwell M.C.12), high-purity silver, palladium, copper and gold. Four single-liquid priming agents containing organic sulfur compound (Alloy Primer, Metaltite, M.L. Primer and V-Primer) and three acidic priming agents (All Bond II Primer B, Estenia Opaque Primer and Super-Bond Liquid) were assessed. The metal specimens were flat-ground with abrasive papers, primed with one of the agents and bonded with a tri-n-butylborane initiated resin. The shear bond strengths were determined both before and after repeated thermocycling (5°C and 55°C, 1 min each, 20,000 cycles). The results were statistically analyzed with a non-parametric procedure (p = 0.05 level).


RESULTS
The post-thermocycling bond strengths in MPa (median; n = 11) associated with the Alloy Primer, Metaltite, M.L. Primer and V-Primer materials were, respectively, 20.8, 22.8, 17.8 and 18.4 for the Ag-Pd-Cu-Au alloy; 19.6, 21.9, 14.4 and 20.1 for silver; 5.4, 4.5, 12.8 and 5.3 for palladium; 17.1, 19.2, 0.7 and 6.6 for copper; and 18.5, 17.7, 22.8 and 15.4 for gold.


CONCLUSIONS
It can be concluded that the use of the four priming agents, which are based on organic sulfur compounds, effectively enhanced bonding to the Ag-Pd-Cu-Au alloy and the component metals, although the bonding performance varied among the priming agents and metal elements. The priming agents appeared to have more of an effect on the alloy, silver and gold than on the palladium and copper.
Division of Applied Oral Sciences, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
Miyuki
M
Yamashita
Hiroyasu
H
Koizumi
Takaya
T
Ishii
Daisuke
D
Nakayama
Yusuke
Y
Oba
Hideo
H
Matsumura
D000180:Acrylic Resins / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D006358:Hot Temperature; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012834:Silver / Q000737:chemistry; D018709:Statistics, Nonparametric; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013457:Sulfur Compounds / Q000737:chemistry; D013871:Thiones / Q000737:chemistry; D013889:Thiouracil / Q000031:analogs & derivatives / Q000737:chemistry; D014227:Triazines / Q000737:chemistry; D014961:X-Ray Diffraction
D000180:Acrylic Resins; C120982:Ag-Pd-Cu-Au alloy; C521707:Alloy Primer; D001896:Boron Compounds; D003722:Dental Alloys; D017220:Dentin-Bonding Agents; C521708:Estenia Opaque Primer; C509518:M. L. Primer; C509517:Metaltite; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D013438:Sulfhydryl Compounds; D013457:Sulfur Compounds; D013871:Thiones; D014227:Triazines; C107059:V-Primer; C009523:tri-n-butylborane; C100742:All-Bond 2; D012834:Silver; D013889:Thiouracil; D010165:Palladium; D006046:Gold; D003300:Copper; C049495:Super-bond