Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength
This study investigated the influence of conventional (10 s at 1160 mW/cm<sup>2</sup>) and fast high-irradiance (3 s at 2850 mW/cm<sup>2</sup>) light curing on the micro-tensile bond strength (μTBS) of bulk-fill resin composites bonded to human dentin. Sixty-four extracted hu...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/21/7467 |
| _version_ | 1797467481075351552 |
|---|---|
| author | Tobias Steffen Matej Par Thomas Attin Tobias T. Tauböck |
| author_facet | Tobias Steffen Matej Par Thomas Attin Tobias T. Tauböck |
| author_sort | Tobias Steffen |
| collection | DOAJ |
| description | This study investigated the influence of conventional (10 s at 1160 mW/cm<sup>2</sup>) and fast high-irradiance (3 s at 2850 mW/cm<sup>2</sup>) light curing on the micro-tensile bond strength (μTBS) of bulk-fill resin composites bonded to human dentin. Sixty-four extracted human molars were ground to dentin and randomly assigned into eight groups (n = 8 per group). After application of a three-step adhesive system (Optibond FL), four different bulk-fill composites (two sculptable and two flowable composites) were placed. Of these, one sculptable (Tetric PowerFill) and one flowable (Tetric PowerFlow) composite were specifically developed for fast high-irradiance light curing. Each composite was polymerized with the conventional or the fast high-irradiance light-curing protocol. The specimens were cut into dentin-composite sticks, μTBS was determined and failure modes were analyzed. Statistical analysis was performed using <i>t</i>-test for independent observations and one-way ANOVA. A statistical difference between the curing protocols was only found for Tetric PowerFlow, where the conventional protocol (23.8 ± 4.2 MPa) led to significantly higher values than the fast high-irradiance light-curing protocol (18.7 ± 3.7 MPa). All other composite materials showed statistically similar values for both polymerization protocols. In conclusion, the use of fast high-irradiation light curing has no negative influence on the μTBS of the investigated high-viscosity bulk-fill composites. However, it may reduce the dentin bond strength of flowable bulk-fill composite. |
| first_indexed | 2024-03-09T18:54:16Z |
| format | Article |
| id | doaj.art-e5d21e7e3b1d4c7dacf341e99f9bb3bb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:54:16Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e5d21e7e3b1d4c7dacf341e99f9bb3bb2023-11-24T05:35:42ZengMDPI AGMaterials1996-19442022-10-011521746710.3390/ma15217467Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond StrengthTobias Steffen0Matej Par1Thomas Attin2Tobias T. Tauböck3Clinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, 8032 Zurich, SwitzerlandDepartment of Endodontics and Restorative Dentistry, School of Dental Medicine, University of Zagreb, Gunduliceva 5, 10000 Zagreb, CroatiaClinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, 8032 Zurich, SwitzerlandClinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, 8032 Zurich, SwitzerlandThis study investigated the influence of conventional (10 s at 1160 mW/cm<sup>2</sup>) and fast high-irradiance (3 s at 2850 mW/cm<sup>2</sup>) light curing on the micro-tensile bond strength (μTBS) of bulk-fill resin composites bonded to human dentin. Sixty-four extracted human molars were ground to dentin and randomly assigned into eight groups (n = 8 per group). After application of a three-step adhesive system (Optibond FL), four different bulk-fill composites (two sculptable and two flowable composites) were placed. Of these, one sculptable (Tetric PowerFill) and one flowable (Tetric PowerFlow) composite were specifically developed for fast high-irradiance light curing. Each composite was polymerized with the conventional or the fast high-irradiance light-curing protocol. The specimens were cut into dentin-composite sticks, μTBS was determined and failure modes were analyzed. Statistical analysis was performed using <i>t</i>-test for independent observations and one-way ANOVA. A statistical difference between the curing protocols was only found for Tetric PowerFlow, where the conventional protocol (23.8 ± 4.2 MPa) led to significantly higher values than the fast high-irradiance light-curing protocol (18.7 ± 3.7 MPa). All other composite materials showed statistically similar values for both polymerization protocols. In conclusion, the use of fast high-irradiation light curing has no negative influence on the μTBS of the investigated high-viscosity bulk-fill composites. However, it may reduce the dentin bond strength of flowable bulk-fill composite.https://www.mdpi.com/1996-1944/15/21/7467high-irradiance light curingrapid photo-polymerizationbulk-fill resin compositesmicro-tensile bond strengthdentin adhesionfailure analysis |
| spellingShingle | Tobias Steffen Matej Par Thomas Attin Tobias T. Tauböck Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength Materials high-irradiance light curing rapid photo-polymerization bulk-fill resin composites micro-tensile bond strength dentin adhesion failure analysis |
| title | Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength |
| title_full | Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength |
| title_fullStr | Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength |
| title_full_unstemmed | Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength |
| title_short | Effect of Fast High-Irradiance Photo-Polymerization of Resin Composites on the Dentin Bond Strength |
| title_sort | effect of fast high irradiance photo polymerization of resin composites on the dentin bond strength |
| topic | high-irradiance light curing rapid photo-polymerization bulk-fill resin composites micro-tensile bond strength dentin adhesion failure analysis |
| url | https://www.mdpi.com/1996-1944/15/21/7467 |
| work_keys_str_mv | AT tobiassteffen effectoffasthighirradiancephotopolymerizationofresincompositesonthedentinbondstrength AT matejpar effectoffasthighirradiancephotopolymerizationofresincompositesonthedentinbondstrength AT thomasattin effectoffasthighirradiancephotopolymerizationofresincompositesonthedentinbondstrength AT tobiasttaubock effectoffasthighirradiancephotopolymerizationofresincompositesonthedentinbondstrength |