Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin
Objectives: The polymerization shrinkage of methacrylate-based composites is among the most important causes of failure of composite restorations. The manufacturers claim that bulk-fill composites have a lower polymerization shrinkage than conventional composites. This study aimed to assess the poly...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Tehran University of Medical Sciences
2018-11-01
|
| Series: | Frontiers in Dentistry |
| Subjects: | |
| Online Access: | https://jdt.tums.ac.ir/index.php/jdt/article/view/2637 |
| _version_ | 1818760068605149184 |
|---|---|
| author | Mahdi Abbasi Zohreh Moradi Mansoureh Mirzaei Mohammad Javad Kharazifard Samaneh Rezaei |
| author_facet | Mahdi Abbasi Zohreh Moradi Mansoureh Mirzaei Mohammad Javad Kharazifard Samaneh Rezaei |
| author_sort | Mahdi Abbasi |
| collection | DOAJ |
| description | Objectives: The polymerization shrinkage of methacrylate-based composites is among the most important causes of failure of composite restorations. The manufacturers claim that bulk-fill composites have a lower polymerization shrinkage than conventional composites. This study aimed to assess the polymerization shrinkage of five bulk-fill composites in comparison with a conventional composite.
Materials and Methods: In this in-vitro experimental study, composite discs (n=30) were fabricated using everX Posterior (EXP), Filtek Bulk-Fill Posterior (FBP), SonicFill 2 (SF2), Tetric N-Ceram Bulk-Fill (TNB), X-tra fil (XF), and Filtek Z250 conventional composite at the center of a metal ring bonded to a microscope slide and were covered with a coverslip. This assembly was transferred to a linear variable differential transformer (LVDT). Light-curing (1200 mW/cm2) was performed from underneath the slide for 30 seconds. The deflecting disc method and LVDT were used to assess the dimensional changes of the samples (indicative of polymerization shrinkage) at 1, 30, 60, and 1800 seconds following the onset of light irradiation. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey’s test.
Results: The groups were significantly different regarding polymerization shrinkage (P<0.002). The polymerization shrinkage of the tested composites following the onset of light irradiation ranged from 0.19 to 3.03. EXP showed a significantly higher polymerization shrinkage than other composites at 30, 60, and 1800 seconds after light irradiation, while XF showed the lowest polymerization shrinkage at the aforementioned time points.
Conclusions: The tested bulk-fill composites had a polymerization shrinkage similar to that of the conventional composite. |
| first_indexed | 2024-12-18T06:52:45Z |
| format | Article |
| id | doaj.art-2aa2144469a340a4ae9a0a2fde2aae28 |
| institution | Directory Open Access Journal |
| issn | 2676-296X |
| language | English |
| last_indexed | 2024-12-18T06:52:45Z |
| publishDate | 2018-11-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | Frontiers in Dentistry |
| spelling | doaj.art-2aa2144469a340a4ae9a0a2fde2aae282022-12-21T21:17:17ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2018-11-011562637Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite ResinMahdi Abbasi0Zohreh Moradi1Mansoureh Mirzaei2Mohammad Javad Kharazifard3Samaneh Rezaei4Assistant Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssociate Professor, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranResearch Member, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, IranPostgraduate Student, Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranObjectives: The polymerization shrinkage of methacrylate-based composites is among the most important causes of failure of composite restorations. The manufacturers claim that bulk-fill composites have a lower polymerization shrinkage than conventional composites. This study aimed to assess the polymerization shrinkage of five bulk-fill composites in comparison with a conventional composite. Materials and Methods: In this in-vitro experimental study, composite discs (n=30) were fabricated using everX Posterior (EXP), Filtek Bulk-Fill Posterior (FBP), SonicFill 2 (SF2), Tetric N-Ceram Bulk-Fill (TNB), X-tra fil (XF), and Filtek Z250 conventional composite at the center of a metal ring bonded to a microscope slide and were covered with a coverslip. This assembly was transferred to a linear variable differential transformer (LVDT). Light-curing (1200 mW/cm2) was performed from underneath the slide for 30 seconds. The deflecting disc method and LVDT were used to assess the dimensional changes of the samples (indicative of polymerization shrinkage) at 1, 30, 60, and 1800 seconds following the onset of light irradiation. Data were analyzed using one-way analysis of variance (ANOVA) and Tukey’s test. Results: The groups were significantly different regarding polymerization shrinkage (P<0.002). The polymerization shrinkage of the tested composites following the onset of light irradiation ranged from 0.19 to 3.03. EXP showed a significantly higher polymerization shrinkage than other composites at 30, 60, and 1800 seconds after light irradiation, while XF showed the lowest polymerization shrinkage at the aforementioned time points. Conclusions: The tested bulk-fill composites had a polymerization shrinkage similar to that of the conventional composite.https://jdt.tums.ac.ir/index.php/jdt/article/view/2637Filtek Bulk FillComposite ResinsPolymerization |
| spellingShingle | Mahdi Abbasi Zohreh Moradi Mansoureh Mirzaei Mohammad Javad Kharazifard Samaneh Rezaei Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin Frontiers in Dentistry Filtek Bulk Fill Composite Resins Polymerization |
| title | Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin |
| title_full | Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin |
| title_fullStr | Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin |
| title_full_unstemmed | Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin |
| title_short | Polymerization Shrinkage of Five Bulk-Fill Composite Resins in Comparison with a Conventional Composite Resin |
| title_sort | polymerization shrinkage of five bulk fill composite resins in comparison with a conventional composite resin |
| topic | Filtek Bulk Fill Composite Resins Polymerization |
| url | https://jdt.tums.ac.ir/index.php/jdt/article/view/2637 |
| work_keys_str_mv | AT mahdiabbasi polymerizationshrinkageoffivebulkfillcompositeresinsincomparisonwithaconventionalcompositeresin AT zohrehmoradi polymerizationshrinkageoffivebulkfillcompositeresinsincomparisonwithaconventionalcompositeresin AT mansourehmirzaei polymerizationshrinkageoffivebulkfillcompositeresinsincomparisonwithaconventionalcompositeresin AT mohammadjavadkharazifard polymerizationshrinkageoffivebulkfillcompositeresinsincomparisonwithaconventionalcompositeresin AT samanehrezaei polymerizationshrinkageoffivebulkfillcompositeresinsincomparisonwithaconventionalcompositeresin |