Bond strength of resin cements to H2O2-treated titanium plates.
OBJECTIVE
This study investigated the effects of H(2)O(2)-treatment of titanium surfaces on cement shear bond strengths, and characterized H(2)O(2)-treated titanium surfaces.


METHODS
Using 34.5% hydrogen peroxide solution, cp Ti plates (10 mm x 10 mm x 1 mm) were treated by (1) an immersion method, and (2) halogen irradiation while immersed in H(2)O(2) for varying times. A cylindrical block (6 mm diameter, 4 mm height) of four different cements was bonded onto H(2)O(2)-treated surfaces. The cement bond strengths were evaluated under shear mode. Treated surfaces were also characterized for color change, wettability, AC impedance, and transmission electron diffraction of stripped oxide film.


RESULTS
The cement shear bond strength of cp Ti treated with H(2)O(2) and halogen for 160 s was the highest and was approximately 14 times higher than the un-treated control cp Ti plates. Bond strengths are correlated linearly to wettability. The more surface wetted with the cement material, the higher the resultant shear bond strength value.


CONCLUSIONS
These results suggest that a combined treatment of hydrogen peroxide and halogen light irradiation provides an effective surface condition with appropriate oxide film thickness to enhance the cement bond strength.
Yoshida
Takamitsu
T
Department of Dental Materials, Hard Tissue Research, Matsumoto Dental University, Tokyo, Japan.
Terashima
Nobuyoshi
N
Niiro
Toru
T
Nagasawa
Sakae
S
Ito
Michio
M
Yagasaki
Hiroshi
H
Oshida
Yoshiki
Y
Agarwal
Parul
P
D003116:Color; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry* / Q000528:radiation effects; D017097:Electric Impedance; D004563:Electrochemistry; D006801:Humans; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007101:Immersion; D008027:Light; D008422:Materials Testing; D016877:Oxidants / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry* / Q000528:radiation effects; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D017155:Wettability
D003764:Dental Materials; D016877:Oxidants; D010087:Oxides; D019279:Resin Cements; D006861:Hydrogen Peroxide; D014025:Titanium