Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances
Objective: This study aimed to compare the surface microhardness of a nanohybrid and a microhybrid resin composite light-cured at two different distances.Methods: A total of 40 disc specimens were prepared for this in vitro experiment; 20 from a nanohybrid composite resin (Filtek P60; 3M ESPE) and 2...
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| Format: | Article |
| Language: | English |
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Mashhad University of Medical Sciences
2023-12-01
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| Series: | Journal of Dental Materials and Techniques |
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| Online Access: | https://jdmt.mums.ac.ir/article_23539_75ad2deb7f9c546ba878e1127470d21c.pdf |
| _version_ | 1797360924462415872 |
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| author | Zuloeta-Navarro Luz Clarita Orrego-Ferreyros Luis Alexander |
| author_facet | Zuloeta-Navarro Luz Clarita Orrego-Ferreyros Luis Alexander |
| author_sort | Zuloeta-Navarro Luz Clarita |
| collection | DOAJ |
| description | Objective: This study aimed to compare the surface microhardness of a nanohybrid and a microhybrid resin composite light-cured at two different distances.Methods: A total of 40 disc specimens were prepared for this in vitro experiment; 20 from a nanohybrid composite resin (Filtek P60; 3M ESPE) and 20 from a microhybrid composite resin (Filtek Z250; 3M ESPE). Each group was divided into two equal subgroups (n=10), based on the distance between the light-curing device and the composite surface (either 2 or 4 mm). After 24 hours of curing, the teeth underwent the microhardness test to determine the Vickers hardness number (VHN) at the surface. The data were subjected to statistical analysis using a two-way analysis of variance (ANOVA) at the significance level of P<0.05.Results: The nanohybrid resin composite showed higher microhardness values than the microhybrid resin at both 2 mm and 4 mm distances, although the difference between the two groups was only significant at the distance of 4 mm (P = 0.017). No significant difference was observed in the nanohybrid composite resin between the two curing distances (P = 0.151). However, the hardness of the microhybrid composite decreased significantly with increasing the curing distance from 2 to 4 mm (P = 0.015).Conclusions: This study reveals that light-curing distance significantly affects the microhardness of microhybrid composite resin. The nanohybrid composite showed comparable hardness up to the distance of 4 mm, indicating its suitability to be used in situations where a close curing distance cannot be achieved. |
| first_indexed | 2024-03-08T15:46:34Z |
| format | Article |
| id | doaj.art-38cb012d722f4079a4d1369fc01df87d |
| institution | Directory Open Access Journal |
| issn | 2322-4150 2252-0317 |
| language | English |
| last_indexed | 2024-03-08T15:46:34Z |
| publishDate | 2023-12-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Journal of Dental Materials and Techniques |
| spelling | doaj.art-38cb012d722f4079a4d1369fc01df87d2024-01-09T10:12:50ZengMashhad University of Medical SciencesJournal of Dental Materials and Techniques2322-41502252-03172023-12-0112417517910.22038/jdmt.2023.74098.158123539Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distancesZuloeta-Navarro Luz Clarita0Orrego-Ferreyros Luis Alexander1Private Practice, Chiclayo, Peru.Clinical Epidemiology Unit, School of Medicine, Cayetano Heredia University, Lima, Peru.Objective: This study aimed to compare the surface microhardness of a nanohybrid and a microhybrid resin composite light-cured at two different distances.Methods: A total of 40 disc specimens were prepared for this in vitro experiment; 20 from a nanohybrid composite resin (Filtek P60; 3M ESPE) and 20 from a microhybrid composite resin (Filtek Z250; 3M ESPE). Each group was divided into two equal subgroups (n=10), based on the distance between the light-curing device and the composite surface (either 2 or 4 mm). After 24 hours of curing, the teeth underwent the microhardness test to determine the Vickers hardness number (VHN) at the surface. The data were subjected to statistical analysis using a two-way analysis of variance (ANOVA) at the significance level of P<0.05.Results: The nanohybrid resin composite showed higher microhardness values than the microhybrid resin at both 2 mm and 4 mm distances, although the difference between the two groups was only significant at the distance of 4 mm (P = 0.017). No significant difference was observed in the nanohybrid composite resin between the two curing distances (P = 0.151). However, the hardness of the microhybrid composite decreased significantly with increasing the curing distance from 2 to 4 mm (P = 0.015).Conclusions: This study reveals that light-curing distance significantly affects the microhardness of microhybrid composite resin. The nanohybrid composite showed comparable hardness up to the distance of 4 mm, indicating its suitability to be used in situations where a close curing distance cannot be achieved.https://jdmt.mums.ac.ir/article_23539_75ad2deb7f9c546ba878e1127470d21c.pdfcomposite resinscuring lightshardness testmicrohybrid compositenanohybrid compositerestorative treatment |
| spellingShingle | Zuloeta-Navarro Luz Clarita Orrego-Ferreyros Luis Alexander Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances Journal of Dental Materials and Techniques composite resins curing lights hardness test microhybrid composite nanohybrid composite restorative treatment |
| title | Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| title_full | Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| title_fullStr | Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| title_full_unstemmed | Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| title_short | Surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| title_sort | surface microhardness of nanohybrid and microhybrid composite resins light cured at different distances |
| topic | composite resins curing lights hardness test microhybrid composite nanohybrid composite restorative treatment |
| url | https://jdmt.mums.ac.ir/article_23539_75ad2deb7f9c546ba878e1127470d21c.pdf |
| work_keys_str_mv | AT zuloetanavarroluzclarita surfacemicrohardnessofnanohybridandmicrohybridcompositeresinslightcuredatdifferentdistances AT orregoferreyrosluisalexander surfacemicrohardnessofnanohybridandmicrohybridcompositeresinslightcuredatdifferentdistances |