Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins
Background and aims. Bleaching may exert some negative effects on existing composite resin restorations. The aim of this study was to evaluate the effect of home bleaching on microleakage of fiber-reinforced and particle-filled composite resins. Materials and methods. Ninety class V cavities (1.5...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Tabriz University of Medical Sciences
2013-12-01
|
| Series: | Journal of Dental Research, Dental Clinics, Dental Prospects |
| Subjects: | |
| Online Access: | http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/667/311 |
| _version_ | 1818154480996188160 |
|---|---|
| author | Farahnaz Sharafeddin Samira Zare Zahra Javnmardi3 |
| author_facet | Farahnaz Sharafeddin Samira Zare Zahra Javnmardi3 |
| author_sort | Farahnaz Sharafeddin |
| collection | DOAJ |
| description | Background and aims. Bleaching may exert some negative effects on existing composite resin restorations. The aim of
this study was to evaluate the effect of home bleaching on microleakage of fiber-reinforced and particle-filled composite
resins.
Materials and methods. Ninety class V cavities (1.5×2×3 mm) were prepared on the buccal surfaces of 90 bovine
teeth. The teeth were randomly divided into 6 groups (n=15) and restored as follows: Groups 1 and 2 with Z100, groups 3
and 4 with Z250, and groups 5 and 6 with Nulite F composite resins. All the specimens were thermocycled. Groups 1, 3 and
5 were selected as control groups (without bleaching) and the experimental groups 2, 4 and 6 were bleached with 22% carbamide
peroxide gel. All the samples were immersed in 2% basic fuchsin dye for 24 hours and then sectioned longitudinally.
Dye penetration was evaluated under a stereomicroscope (×25), at both the gingival and incisal margins. Data were
analyzed using Kruskal-Wallis, Mann-Whitney and Wilcoxon tests (α=0.05).
Results. Statistical analyses revealed that bleaching gel increased microleakage only at gingival margins with Z250
(P=0.007). Moreover, the control groups showed a statistically significant difference in microleakage at their gingival margins.
Nulite F had the maximum microleakage while Z250 showed the minimum (P=0.006).
Conclusion. Microleakage of home-bleached restorations might be related to the type of composite resin used. |
| first_indexed | 2024-12-11T14:27:11Z |
| format | Article |
| id | doaj.art-1a8abf91852e4750b21971cc0d58b975 |
| institution | Directory Open Access Journal |
| issn | 2008-210X 2008-2118 |
| language | English |
| last_indexed | 2024-12-11T14:27:11Z |
| publishDate | 2013-12-01 |
| publisher | Tabriz University of Medical Sciences |
| record_format | Article |
| series | Journal of Dental Research, Dental Clinics, Dental Prospects |
| spelling | doaj.art-1a8abf91852e4750b21971cc0d58b9752022-12-22T01:02:36ZengTabriz University of Medical SciencesJournal of Dental Research, Dental Clinics, Dental Prospects2008-210X2008-21182013-12-017421121710.5681/joddd.2013.034Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite ResinsFarahnaz Sharafeddin0Samira Zare1Zahra Javnmardi32Associate Professor, Biomaterial Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IranAsistant Professor, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IranPostgraduate Student, Department of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran Background and aims. Bleaching may exert some negative effects on existing composite resin restorations. The aim of this study was to evaluate the effect of home bleaching on microleakage of fiber-reinforced and particle-filled composite resins. Materials and methods. Ninety class V cavities (1.5×2×3 mm) were prepared on the buccal surfaces of 90 bovine teeth. The teeth were randomly divided into 6 groups (n=15) and restored as follows: Groups 1 and 2 with Z100, groups 3 and 4 with Z250, and groups 5 and 6 with Nulite F composite resins. All the specimens were thermocycled. Groups 1, 3 and 5 were selected as control groups (without bleaching) and the experimental groups 2, 4 and 6 were bleached with 22% carbamide peroxide gel. All the samples were immersed in 2% basic fuchsin dye for 24 hours and then sectioned longitudinally. Dye penetration was evaluated under a stereomicroscope (×25), at both the gingival and incisal margins. Data were analyzed using Kruskal-Wallis, Mann-Whitney and Wilcoxon tests (α=0.05). Results. Statistical analyses revealed that bleaching gel increased microleakage only at gingival margins with Z250 (P=0.007). Moreover, the control groups showed a statistically significant difference in microleakage at their gingival margins. Nulite F had the maximum microleakage while Z250 showed the minimum (P=0.006). Conclusion. Microleakage of home-bleached restorations might be related to the type of composite resin used.http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/667/311Bleachingcomposite resinfiber-reinforcedfillermicroleakage |
| spellingShingle | Farahnaz Sharafeddin Samira Zare Zahra Javnmardi3 Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins Journal of Dental Research, Dental Clinics, Dental Prospects Bleaching composite resin fiber-reinforced filler microleakage |
| title | Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins |
| title_full | Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins |
| title_fullStr | Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins |
| title_full_unstemmed | Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins |
| title_short | Effect of Home Bleaching on Microleakage of Fiber-reinforced and Particle-filled Composite Resins |
| title_sort | effect of home bleaching on microleakage of fiber reinforced and particle filled composite resins |
| topic | Bleaching composite resin fiber-reinforced filler microleakage |
| url | http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/667/311 |
| work_keys_str_mv | AT farahnazsharafeddin effectofhomebleachingonmicroleakageoffiberreinforcedandparticlefilledcompositeresins AT samirazare effectofhomebleachingonmicroleakageoffiberreinforcedandparticlefilledcompositeresins AT zahrajavnmardi3 effectofhomebleachingonmicroleakageoffiberreinforcedandparticlefilledcompositeresins |