THE JOURNAL OF - Dentsply

Frankenberger et al
Table 2 Results of μTBS investigation to cavity floor dentin
Adhesive
Dentin
contamination
Cleaning
method
Curing mode
of adhesive
μTBS
to cavity floor
dentin in MPa (SD)
XP BOND / SCA
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Temp Bond
Temp Bond
Temp Bond
Temp Bond NE
Temp Bond NE
Temp Bond NE
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Scaler
Prophypearls
Clinpro powder
Scaler
Prophypearls
Clinpro powder
No LC
separate
IDS
RC
no LC
no LC
no LC
no LC
no LC
no LC
39.6 (26.6)
36.3 (19.2)
38.4 (13.6)
53.9 (17.1)
21.9 (20.7)
10.0 (14.9)
34.5 (8.1)
27.3 (16.2)
11.0 (14.9)
36.3 (20.5)
Syntac
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---
---
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Temp Bond
Temp Bond
Temp Bond
Temp Bond NE
Temp Bond NE
Temp Bond NE
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---
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Scaler
Prophypearls
Clinpro powder
Scaler
Prophypearls
Clinpro powder
No LC
separate
IDS
RC
w/o adhesive
no LC
no LC
no LC
no LC
no LC
no LC
13.7 (15.7)
19.0 (14.2)
30.1 (15.9)
47.9 (18.0)
22.5 (14.3)
9.7 (8.9)
5.9 (6.5)
12.1 (11.4)
7.1 (10.3)
4.1 (5.1)
12.0 (8.9)
OptiBond FL
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Temp Bond
Temp Bond
Temp Bond
Temp Bond NE
Temp Bond NE
Temp Bond NE
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Scaler
Prophypearls
Clinpro powder
Scaler
Prophypearls
Clinpro powder
No LC
separate
IDS
RC
w/o adhesive
no LC
no LC
no LC
no LC
no LC
no LC
19.2 (16.3)
26.6 (13.8)
37.7 (16.9)
50.7 (17.8)
24.0 (17.5)
10.4 (9.5)
6.5 (6.5)
18.2 (12.6)
8.3 (10.2)
8.2 (10.5)
22.1 (18.0)
IDS=immediate dentin sealing; RC=resin-coating technique
erwise, the luting composites were cured together with the
adhesives with an occlusal curing time of 220 s.
The peripheral areas of the reconstructed/filled teeth
were removed, remaining specimens were sectioned into
slices in an apical direction, which were sectioned again to
yield resin-dentin beams. The saw was adjusted to steps of
1 mm, due to the thickness of the blade (300 μm) resulting
in sticks with a cross-sectional area of 700 x 700 μm (0.5
mm 2 ). From the resulting sticks of each group, 20 were selected
(n = 20). These 20 sticks had to have a remaining
dentin thickness to the pulp of 2.0 ± 0.5 mm. If more than
20 beams were collected with the correct remaining dentin
thickness, 20 sticks were randomly selected. For the case
that one or more of the selected sticks failed due to the sectioning
process, the percentage of prematurely failed specimens
in relation to the total number of selected specimens
was recorded. If more than 20 beams were collected with
the correct remaining dentin thickness, 20 sticks were randomly
selected. For the case that one or more of the selected
sticks failed due to the sectioning process, the failed
specimens received 0 MPa as final μTBS result. 38 The μTBS
sticks were stored in distilled water for 24 h at 37°C and then
fractured according to a well-suited protocol. 3 Fractured interfaces
were submitted to SEM (Leitz ISI 50, Akashi; Tokyo,
Japan; sputtering with Balzers SCD; Balzers, Liechtenstein).
Statistical analysis was performed using SPSS, Version
14.0 for Windows XP (SPSS; Chicago, IL, USA). As the majority
of groups did not exhibit normal data distribution (Kolmogorov-Smirnov
test), nonparametric tests were used
(Wilcoxon matched-pairs signed-ranks test, Mann-Whitney
U-test) for pairwise comparisons at the 95% significance
level.
Vol 9, Supplement 2, 2007 271