Method: Were prepared 120 specimens of resin composite (RC) with 2 mm of thickness. These half were cured with an LED unit and the other with QHT. To simulate the depth of cure was used wafer resin polymerized with 1 or 2 mm of the same composite resin to be polymerized (Rueggeberg, 1994). The specimens were divided according to the deep of polymerization (2, 3 and 4 mm) and types of permeants in which they were immersed (water or ethanol 75%), n = 5. The methodology was based on ISO 4049:2000. After examination of the sorption and solubility, the data were subjected to analysis of variance (ANOVA), followed by test Tukey with α= 0,05.
Result:
Sorption |
Z350 |
P90 |
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Permeant |
Deep |
QTH |
LED |
QTH |
LED |
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Water |
2 mm |
16,75 ± 2,32 a,A |
16,79 ± 1,24 a,A |
7,40 ± 0,63 b,A |
7,72 ± 0,76 b,A |
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3 mm |
26,11 ± 3,60 a,B |
20,69 ± 1,46 a,AB |
7,09 ± 0,52 b,A |
7,75 ± 1,49 b,A |
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4 mm |
27,41 ± 3,28 a,B |
20,94 ± 1,60 b,AB |
11,28 ± 1,49 c,AB |
9,05 ± 1,81 c,A |
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Ethanol |
2 mm |
26,25 ± 1,88 a,B |
25,82 ± 1,33 a,B |
12,27 ± 1,64 b,AB |
10,67 ± 0,85 b,AB |
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3 mm |
50,27 ± 5,56 a,C |
43,93 ± 4,95 b,C |
13,82 ± 2,30 c,B |
15,76 ± 2,13 c,B |
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4 mm |
53,38 ± 3,49 a,C |
56,67 ± 3,14 a,D |
13,57 ± 1,32 b,B |
17,97 ± 3,35 b,BC |
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|
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Solubility |
Z350 |
P90 |
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Permeant |
Deep |
QTH |
LED |
QTH |
LED |
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Water
|
2 mm |
-0,55 ± 1,41 a,A |
-4,08 ± 1,51 a,A |
-3,36 ± 0,58 a,A |
-2,19 ± 3,36 a,A |
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3 mm |
3,13 ± 0,79 a,A |
1,12 ± 1,20 a,A |
-5,59 ± 0,31 b,A |
-4,61 ± 1,4 b,A |
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4 mm |
2,74 ± 0,64 a,A |
2,81 ± 1,16 a,A |
-4,44 ± 1,50 b,A |
-5,54 ± 0,72 b,A |
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Ethanol |
2 mm |
3,53 ± 0,38 a,A |
4,05 ± 1,07 a,A |
-5,78 ± 0,83 b,A |
-6,54 ± 0,59 b,A |
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3 mm |
32,33 ± 6,62 a,B |
28,90 ± 5,73 a,B |
-6,83 ± 3,04 b,A |
2,96 ± 3,44 c,A |
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4 mm |
39,63 ± 2,28 a,C |
51,50 ± 3,09 b,C |
-2,08 ± 1,90 c,A |
9,32 ± 5,85 d,B |
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Conclusion: The composite resin-based methacrylate (Filtek Z350) had higher sorption and permeant solubility in ethanol 75%, and with increasing distance curing compared to silorane based resin (Filtek P90).