Influence of matrix type on marginal gap formation of deep class II bulk-fill composite restorations
Please always quote using this URN: urn:nbn:de:bvb:20-opus-270712
- Background: To test the hypothesis that transparent matrices result in more continuous margins of bulk-fill composite (BFC) restorations than metal matrices. Methods: Forty standardized MOD cavities in human molars with cervical margins in enamel and dentin were created and randomly assigned to four restorative treatment protocols: conventional nanohybrid composite (NANO) restoration (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Liechtenstein) with a metal matrix (NANO-METAL) versus transparent matrix (NANO-TRANS), and bulk-fill compositeBackground: To test the hypothesis that transparent matrices result in more continuous margins of bulk-fill composite (BFC) restorations than metal matrices. Methods: Forty standardized MOD cavities in human molars with cervical margins in enamel and dentin were created and randomly assigned to four restorative treatment protocols: conventional nanohybrid composite (NANO) restoration (Tetric EvoCeram, Ivoclar Vivadent, Schaan, Liechtenstein) with a metal matrix (NANO-METAL) versus transparent matrix (NANO-TRANS), and bulk-fill composite restoration (Tetric EvoCeram Bulk Fill, Ivoclar Vivadent, Schaan, Liechtenstein) with a metal matrix (BFC-METAL) versus transparent matrix (BFC-TRANS). After artificial aging (2500 thermal cycles), marginal quality was evaluated by scanning electron microscopy using the replica technique. Statistical analyses were performed using the Mann–Whitney U-test and Wilcoxon test. The level of significance was p < 0.05. Results: Metal matrices yielded significantly (p = 0.0011) more continuous margins (46.211%) than transparent matrices (27.073%). Differences in continuous margins between NANO (34.482%) and BFC (38.802%) were not significant (p = 0.56). Matrix type did not influence marginal gap formation in BFC (p = 0.27) but did in NANO restorations (p = 0.001). Conclusion: Metal matrices positively influence the marginal quality of class II composite restorations, especially in deep cavity areas. The bulk-fill composite seems to be less sensitive to the influence of factors such as light polymerization and matrix type.…
| Author: | Britta Hahn, Imme Haubitz, Ralf Krug, Gabriel Krastl, Sebastian Soliman |
|---|---|
| URN: | urn:nbn:de:bvb:20-opus-270712 |
| Document Type: | Journal article |
| Faculties: | Medizinische Fakultät / Poliklinik für Zahnerhaltung und Parodontologie |
| Language: | English |
| Parent Title (English): | International Journal of Environmental Research and Public Health |
| ISSN: | 1660-4601 |
| Year of Completion: | 2022 |
| Volume: | 19 |
| Issue: | 9 |
| Article Number: | 4961 |
| Source: | International Journal of Environmental Research and Public Health (2022) 19:9, 4961. https://doi.org/10.3390/ijerph19094961 |
| DOI: | https://doi.org/10.3390/ijerph19094961 |
| Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
| Tag: | SEM; bulk-fill technique; centripetal technique; class II restoration; marginal gap formation; metal matrix; transparent matrix |
| Release Date: | 2023/05/02 |
| Date of first Publication: | 2022/04/19 |
| Licence (German): |  CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |