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C. IMAMIYA1, A. ISHIKAWA1, Y. SHIMADA1, and J. TAGAMI2, 1Tokyo Medical & Dental University, Japan, 2COE Program, FRMDRTB at TMDU, Tokyo Medical & Dental University, Tokyo, Japan
Objectives: TMX-200 is a newly developed
adhesive material that enables reversible esthetic treatment. This study
evaluated the shear bond strength of TMX-200 to enamel surfaces. Methods:
The
intact or ground labial enamel surfaces of permanent incisors were obtained
and divided into three groups, then treated as follows: Group1: TMX-200
(Kuraray Medical Co.) primer for 20s. Group2: K-etchant (Kuraray Medical
Co.) for 10s. Group3: K-etchant for 10s and TMX-200 primer for 20s. Small
resin cylinders of TMX-200 were bonded to treated surfaces, and photo-irradiated.
A micro-shear test was used to assess the bond strength. Data were analyzed
by two-way ANOVA and Fisher's PLSD test. Mean bond strengths ± SD
(MPa, n=10) are given below. Data with the same superscript letters presented
no statistical significant difference (p>0.05). Results: Ground
enamel showed significant higher bond strength than intact enamel except
for group 1, which no significant difference was found. For ground enamel,
bond strengths obtained for group 3 were significant higher than those
obtained for other groups. But for intact enamel, bond strengths obtained
for group 1 presented no statistical significant difference when compared
to those obtained for either group 2 or group 3.
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Method
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Group1
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Group2
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Group3
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Ground
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28.5 ± 4.60
a,A
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30.2 ± 3.54
a
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38.8 ± 1.72
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Intact
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25.0 ± 4.09
b,c,A
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21.6 ± 4.02
b
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26.9 ± 6.82
c
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Conclusions: The results suggested that the
bond strength of the surfaces treated with TMX-200 were comparable to those
treated with K-etchant, and seemed to be acceptable as a reversible restoration
in clinic. This research was supported by the grant for COE Program, FRMDRTB
at TMDU.
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