Effect of acidic monomers on bonding to SUS XM27 stainless steel, iron, and chromium with a tri-n-butylborane-initiated acrylic resin.
OBJECTIVE
To evaluate the effects of carboxylic and phosphate functional monomers on the bond strength and durability of an acrylic resin joined to a magnetizable stainless steel and its component metals.


METHODS
Disk specimens (10 and 8 mm in diameter and 2.5 mm thick) were prepared from SUS XM27 stainless steel, high-purity iron, and chromium metals. The specimens were ground with abrasive paper, and divided into an unprimed control group and 4 groups primed with: 1. Alloy Primer (thione and phosphate); 2. Estenia Opaque Primer (phosphate); 3. Mr. Bond (aliphatic carboxylic acid); or 4. Super-Bond C&B Liquid (aromatic carboxylic anhydride). The disks were bonded with tri-n-butylborane (TBB)-initiated resin, and the shear bond strengths were determined both before and after thermocycling (20,000 X, 5°C - 55°C). The debonded surfaces were analyzed using Xray diffraction (XRD).


RESULTS
The Alloy Primer and Estenia Opaque Primer materials containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP) effectively bonded the steel (30.3 to 32.4 MPa) and iron (33.6 to 34.8 MPa), whereas the four acidic primers bonded chromium (24.6 to 32.3 MPa). X-ray diffractometry detected corroded iron at the debonded interface.


CONCLUSIONS
Bearing in mind the limitations of the present study, the use of two primers with MDP is recommendable for bonding SUS XM27 steel with TBB-initiated resin. Iron was considered to be a corrosive factor at the adhesive interface, although the associated bonding characteristics were adequate.
Department of Fixed Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
Tsukasa
T
Masuno
Hiroyasu
H
Koizumi
Yumi
Y
Ishikawa
Daisuke
D
Nakayama
Takayuki
T
Yoneyama
Hideo
H
Matsumura
D000180:Acrylic Resins / Q000737:chemistry; D001896:Boron Compounds; D002264:Carboxylic Acids; D002857:Chromium; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry; D001840:Dental Bonding / Q000379:methods*; D003799:Dental Stress Analysis; D006358:Hot Temperature; D007501:Iron; D008422:Materials Testing; D008689:Methacrylates; D020366:Methylmethacrylate; D008768:Methylmethacrylates; D058567:Photoinitiators, Dental; D019279:Resin Cements / Q000737:chemistry; D033081:Shear Strength; D013193:Stainless Steel / Q000737:chemistry; D013871:Thiones
D000180:Acrylic Resins; C521707:Alloy Primer; D001896:Boron Compounds; D002264:Carboxylic Acids; D003722:Dental Alloys; C521708:Estenia Opaque Primer; D008689:Methacrylates; D008768:Methylmethacrylates; D058567:Photoinitiators, Dental; D019279:Resin Cements; D013871:Thiones; D002857:Chromium; C009523:tri-n-butylborane; D013193:Stainless Steel; D020366:Methylmethacrylate; C069749:methacryloyloxydecyl dihydrogen phosphate; C049495:Super-bond; D007501:Iron