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- Original Article MICROHARDNESS AND MICROLEAKAGE OF COMPOSITE RESIN CURED BY VISIBLE LIGHT WITH VARIOUS BAND OF WAVELENGTH
- Soo-Man Park, Jae-Yong Lee, Seung-Ryul Han, Sang-Yoon Ha, Dong-Hoon Shin
-
J Korean Acad Conserv Dent 2002;27(4):-410.
DOI: https://doi.org/10.5395/JKACD.2002.27.4.403
Published online: January 14, 2002
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Copyright © 2002 The Korean Academy of Conservative Dentistry
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Abstract
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Several ways of curing are being tried to improve material’s properties and reduce marginal gap. However, all are considering about the pattern of light intensity. It was noted from the preliminary study the change of light wavelength from filter changing may give an impact on material’s property and microleakage.The object of this study was to verify the effect of filters with various wavelength width on the microhardness and microleakage of composite resin; hybrid type of DenFil and submicron hybrid type of Esthet X. Composite resins were cured using 3 kinds of filter; narrow-banded(465-475 nm), mid-banded(430-470 nm), wide-banded(400-500 nm). After the estimation of microhardness, degree of dye penetration and the maximum gap from SEM evaluation were done between 4 groups that showed no difference in microhardness value of the lower surface.The results were as follows:
Adequate microhardness could not be gained with a narrow-banded filter irrespective of curing time. At the upper surface, DenFil should be polymerized with middle or wide-banded filter for 20 seconds at least, while Esthet X be cured with middle or wide-banded filter for 30 seconds at least to get similar hardness value to control group.
There was little dye penetration in enamel margin, but all dentin margins showed much more dye penetration irrespective of curing conditions. Although there was no statistical difference, groups cured with mid-banded filter for 40 seconds and with wide-width filter for 20 seconds showed relatively less dye penetration.
It was revealed from the SEM examination that group cured with wide-banded filter had the smallest gap without statistical significance. Spearman’s rho test showed that the correlation between the results of dye penetration and SEM examination was very low.
From these results, it could be concluded that curing with wide-width filter would be better than the other techniques, even though the curing technique using mid-width filter seems to have its own unique advantage.
Table 1.
Microhardness values of groups (kg/mm2)
Table 2.
Statistical difference of the upper surface of DenFil
Table 3.
Statistical difference of the upper surface of Esthet X
Table 4.
Statistical difference of the lower surface of DenFil
Table 5.
Statistical difference of the lower surface of Esthet X
Table 6.
Degree of dye penetration in all groups
Table 7.
Ranks of dye penetration (Kruskal-Wallis test)
| Wavelength (time) | N | Mean Rank |
|---|---|---|
| Wide (20) | 10 | 18.90 |
| Wide (30) | 10 | 21.60 |
| Middle (40) | 10 | 15.30 |
| Wide (40) | 10 | 26.20 |
Table 9.
Maximum gap of all groups (μ m)
| Wavelength (time) | Margin | N | Mean (S.D.) |
|---|---|---|---|
| Wide (20) | Gingival | 10 | 13.61 (11.28) |
| Wide (30) | Gingival | 10 | 17.05 (12.21) |
| Middle (40) | Gingival | 10 | 22.93 (24.31) |
| Wide (40) | Gingival | 10 | 18.51 (19.66) |
Table 10.
Homogeneous subset
| Wavelength (time) | N | subset for alpha = .05 |
|---|---|---|
| 1 | ||
| Wide (20) | 10 | 13.61 |
| Wide (30) | 10 | 17.05 |
| Wide (40) | 10 | 18.51 |
| Middle (40) | 10 | 22.93 |
| Sig. | .711 |
Table 11.
Correlation between SEM and dye penetration
| Dye | SEM | ||
|---|---|---|---|
| Spearman’s rho Dye | Correlation | 1.000 | .061 |
| Coefficient | |||
| Sig. (2-tailed) | ) . | .707 | |
| N | 40 | 40 |
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- The Effect of Two Different Light-Curing Units and Curing Times on Bulk-Fill Restorative Materials
Gokcen Deniz Bayrak, Elif Yaman-Dosdogru, Senem Selvi-Kuvvetli
Polymers.2022; 14(9): 1885. CrossRef
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XML DownloadMICROHARDNESS AND MICROLEAKAGE OF COMPOSITE RESIN CURED BY VISIBLE LIGHT WITH VARIOUS BAND OF WAVELENGTH
MICROHARDNESS AND MICROLEAKAGE OF COMPOSITE RESIN CURED BY VISIBLE LIGHT WITH VARIOUS BAND OF WAVELENGTH
| Wavelength | Curing time (sec.) | Upper surface |
Lower surface |
||
|---|---|---|---|---|---|
| DenFil | Esthet X | DenFil | Esthet X | ||
| Narrow | 20 | 78.95 (2.09) | 54.77 (2.81) | 40.06 (3.39) | 26.95 (4.96) |
| 30 | 86.87 (1.22) | 58.25 (5.01) | 58.26 (2.49) | 39.24 (4.20) | |
| 40 | 89.02 (4.36) | 66.98 (5.73) | 66.65 (4.54) | 51.43 (5.38) | |
| Middle | 20 | 100.13 (4.78) | 66.08 (5.64) | 66.47 (3.53) | 44.60 (3.17) |
| 30 | 96.73 (7.48) | 81.28 (5.44) | 84.95 (7.71) | 67.91 (5.63) | |
| 40 | 99.39 (5.68) | 73.95 (2.03) | 79.28 (4.87) | 61.17 (2.70) | |
| Wide | 20 | 95.81 (7.18) | 78.28 (3.82) | 86.49 (7.14) | 64.79 (5.76) |
| 30 | 104.40 (4.58) | 83.55 (8.42) | 95.39 (3.86) | 73.88 (7.16) | |
| 40 | 99.90 (6.83) | 83.19 (9.71) | 94.60 (4.72) | 65.82 (9.48) | |
| Wavelength (time) | N | Subset for alpha = 0.05 |
|||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Narrow (20) | 10 | 78.95 | |||
| Narrow (30) | 10 | 86.87 | 86.87 | ||
| Narrow (40) | 10 | 89.02 | 89.02 | ||
| Wide (20) | 10 | 95.81 | 95.81 | 95.81 | |
| Middle (40) | 10 | 96.73 | 96.73 | ||
| Middle (30) | 10 | 99.39 | |||
| Wide (30) | 10 | 99.90 | |||
| Middle (20) | 10 | 100.13 | |||
| Wide (40) | 10 | 104.40 |
|||
| Significance | 0.216 | 0.097 | 0.251 | 0.129 | |
| Wavelength (time) | N | Subset for alpha = 0.05 | |||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Narrow (20) | 10 | 54.77 | |||
| Narrow (30) | 10 | 58.25 | 58.25 | ||
| Middle (20) | 10 | 66.08 | 66.08 | ||
| Narrow (40) | 10 | 66.98 | 66.98 | ||
| Middle (30) | 10 | 73.95 | 73.95 | ||
| Wide (20) | 10 | 78.28 | |||
| Middle (40) | 10 | 81.28 | |||
| Wide (30) | 10 | 83.19 | |||
| Wide (40) | 10 | 83.55 |
|||
| Significance | 0.987 | 0.219 | 0.360 | 0.119 | |
| Wavelength (time) | N | Subset for alpha = 0.05 | |||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Narrow (20) | 10 | 40.06 | |||
| Narrow (30) | 10 | 58.26 | |||
| Middle (20) | 10 | 66.47 | |||
| Narrow (40) | 10 | 66.65 | |||
| Middle (30) | 10 | 79.28 | |||
| Middle (40) | 10 | 84.95 | |||
| Wide (20) | 10 | 86.49 | 86.49 | ||
| Wide (30) | 10 | 94.60 | |||
| Wide (40) | 10 | 95.39 | |||
| Significance | 1.000 | 0.093 | 0.247 | 0.056 | |
| Wavelength (time) | N | Subset for alpha = 0.05 | |||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||
| Narrow (20) | 10 | 26.95 | |||||
| Narrow (30) | 10 | 39.24 | |||||
| Middle (20) | 10 | 44.60 | 44.60 | ||||
| Narrow (40) | 10 | 51.43 | 51.43 | ||||
| Middle (30) | 10 | 61.17 | 61.17 | ||||
| Wide (20) | 10 | 64.79 | 64.79 | ||||
| Wide (30) | 10 | 65.82 | 65.82 | ||||
| Middle (40) | 10 | 67.91 | 67.91 | ||||
| Wide (40) | 10 | 73.88 |
|||||
| Significance | 1.000 | 0.817 | 0.529 | 0.087 | 0.548 | 0.144 | |
| Wavelength (time) | Margin | N | Mean (S.D.) |
|---|---|---|---|
| Wide (20) | Occlusal | 10 | 0.20 (0.42) |
| Gingival | 10 | 2.00 (1.05) | |
| Wide (30) | Occlusal | 10 | 0.10 (0.32) |
| Gingival | 10 | 2.30 (0.67) | |
| Middle (40) | Occlusal | 10 | 0.10 (0.32) |
| Gingival | 10 | 1.90 (0.57) | |
| Wide (40) | Occlusal | 10 | 0.10 (0.32) |
| Gingival | 10 | 2.60 (0.52) |
| Wavelength (time) | N | Mean Rank |
|---|---|---|
| Wide (20) | 10 | 18.90 |
| Wide (30) | 10 | 21.60 |
| Middle (40) | 10 | 15.30 |
| Wide (40) | 10 | 26.20 |
| dye penetration | |
|---|---|
| Chi-Square | 5.523 |
| df | 3 |
| Asymp. sig. | .137 |
| Wavelength (time) | Margin | N | Mean (S.D.) |
|---|---|---|---|
| Wide (20) | Gingival | 10 | 13.61 (11.28) |
| Wide (30) | Gingival | 10 | 17.05 (12.21) |
| Middle (40) | Gingival | 10 | 22.93 (24.31) |
| Wide (40) | Gingival | 10 | 18.51 (19.66) |
| Wavelength (time) | N | subset for alpha = .05 |
|---|---|---|
| 1 | ||
| Wide (20) | 10 | 13.61 |
| Wide (30) | 10 | 17.05 |
| Wide (40) | 10 | 18.51 |
| Middle (40) | 10 | 22.93 |
| Sig. | .711 |
| Dye | SEM | ||
|---|---|---|---|
| Spearman’s rho Dye | Correlation | 1.000 | .061 |
| Coefficient | |||
| Sig. (2-tailed) | ) . | .707 | |
| N | 40 | 40 |
Table 1. Microhardness values of groups (kg/mm2)
Table 2. Statistical difference of the upper surface of DenFil
Table 3. Statistical difference of the upper surface of Esthet X
Table 4. Statistical difference of the lower surface of DenFil
Table 5. Statistical difference of the lower surface of Esthet X
Table 6. Degree of dye penetration in all groups
Table 7. Ranks of dye penetration (Kruskal-Wallis test)
Table 8. Statistics of K-W test
Table 9. Maximum gap of all groups (μ m)
Table 10. Homogeneous subset
Table 11. Correlation between SEM and dye penetration
