Figure 1 Mean Shear Bond Strength Values of the Different Tested Groups.
Figure 1 Mean Shear Bond Strength Values of the Different Tested Groups.
Groups |
Bleaching Treatment |
Antioxidant Treatment |
Bonding |
|
1 |
25% HP |
None |
Immediately after bleaching |
|
2 |
25% HP |
10% SAS |
After Treatment |
|
3 |
25% |
HP |
25% SAS |
After Treatment |
4 |
25% |
HP |
10% ATS |
After Treatment |
5 |
25% |
HP |
25% ATS |
After Treatment |
6 |
25% |
HP |
None |
After two weeks immersion in artificial saliva |
7 |
None |
None |
After two weeks immersion in artificial saliva |
|
Table1: Groups used in the study
* HP: Hydrogen peroxide. SAS: Sodium ascorbate solution. ATS: α-tocopherol solution
Groups |
Treatment Agent |
Composition |
PH |
2 |
10% sodium ascorbate solution |
sodium ascorbate and water |
8 |
3 |
25% sodium ascorbate solution |
sodium ascorbate and water |
8 |
4 |
10% α-Tocopherol solution |
α-Tocopherol and alcohol |
5.5 |
5 |
25% α-Tocopherol solution |
α-Tocopherol and alcohol |
5.5 |
Table 2: Antioxidants Surface Treatment
|
|
|
N |
Mean |
SD |
Std. |
95% Confidence |
Min |
Max |
|
|
Groups |
|
|
|
Error |
Interval for Mean |
|
|
||
|
|
|
|
|
Lower |
Upper |
|
|
||
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
Bound |
Bound |
|
|
|
(1) |
Im B |
10 |
18.44 |
4.25 |
1.34 |
15.40 |
21.47 |
11.52 |
26.17 |
|
(2) |
10% SAS |
10 |
23.01 |
5.19 |
1.64 |
19.30 |
26.73 |
17.06 |
33.30 |
|
(3) |
25% SAS |
10 |
21.97 |
5.96 |
1.88 |
17.71 |
26.23 |
16.53 |
35.79 |
|
(4) |
10% ATS |
10 |
18.25 |
4.61 |
1.46 |
14.95 |
21.55 |
11.12 |
28.00 |
|
(5) |
25% ATS |
10 |
16.83 |
4.06 |
1.28 |
13.93 |
19.73 |
12.09 |
24.34 |
|
(6) |
Del B |
10 |
31.86 |
7.86 |
2.49 |
26.24 |
37.49 |
17.78 |
41.58 |
|
(7) |
No Bl |
10 |
33.18 |
9.78 |
3.09 |
26.19 |
40.18 |
21.62 |
49.24 |
|
|
Total |
70 |
23.36 |
8.61 |
1.03 |
21.31 |
25.42 |
11.12 |
49.24 |
|
Table 3: Mean, Standard Deviation and Standard Error of Shear Bond Strength of Bleached Enamel to Ceramic Veneers
*Im B: Immediate bonding after bleaching procedure; SAS: Sodium ascorbate solution antioxidant surface treatment; ATS: Alfa-Tocopherol solution antioxidant surface treatment; Del B: Delayed bonding procedure for two weeks after bleaching; No Bl: Bonding to enamel without bleaching.
Group |
|
Subset for α = 0.05 |
|
|
|
||
1 |
|
||
|
2 |
||
5 |
16.83 |
|
|
4 |
18.25 |
|
|
1 |
18.44 |
|
|
3 |
21.97 |
|
|
2 |
23.01 |
|
|
6 |
|
31.86 |
|
7 |
|
33.18 |
|
Sig. |
.308 |
.999 |
|
Table 4: Post Hoc Tests (Tukey HSD- multiple range tests) Showing the Means in Homogenous Subsets
*group1: Immediate bonding after bleaching procedure; group2:10% Sodium ascorbate solution antioxidant surface treatment; group3: 25% Sodium ascorbate solution antioxidant surface treatment. group4:10% Alfa-Tocopherol solution antioxidant surface treatment. group5:25% Alfa-Tocopherol solution antioxidant surface treatment; group6: Delayed bonding procedure for two weeks after bleaching; group7: Bonding to enamel without bleaching.
|
|
|
|
|
Group |
|
|
|
Total |
Mode of Failure |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
|
Adhesive |
% within |
70.0% |
100.0 |
100.0 |
60.0% |
60.0% |
90.0% |
70.0% |
78.6% |
|
Group |
|
% |
% |
|
|
|
|
|
|
% within |
.0% |
.0% |
.0% |
10.0% |
10.0% |
10.0% |
.0% |
4.3% |
Cohesive |
Group |
|
|
|
|
|
|
|
|
|
% within |
30.0% |
.0% |
.0% |
30.0% |
30.0% |
.0% |
30.0% |
17.1% |
Mixed |
Group |
|
|
|
|
|
|
|
|
|
% within |
100.0 |
100.0 |
100.0 |
100.0 |
100.0 |
100.0 |
100.0 |
100.0 |
Total |
Group |
% |
% |
% |
% |
% |
% |
% |
% |
Table 5: Mode of Fracture of the Different Test Groups
*group1: Immediate bonding after bleaching procedure; group2:10% Sodium ascorbate solution antioxidant surface treatment; group3: 25% Sodium ascorbate solution antioxidant surface treatment. group4:10% Alfa-Tocopherol solution antioxidant surface treatment. group5:25% Alfa-Tocopherol solution antioxidant surface treatment; group6: Delayed bonding procedure for two weeks after bleaching; group7: Bonding to enamel without bleaching.