Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength
This study investigated the effect of over-etching and prolonged application time of a universal adhesive on dentin bond strength. Ninety extracted human molars were ground to dentin and randomly allocated into nine groups (G1–9; <i>n</i> = 10 per group), according to the following acid...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/12/2902 |
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| author | Phoebe Burrer Hoang Dang Matej Par Thomas Attin Tobias T. Tauböck |
| author_facet | Phoebe Burrer Hoang Dang Matej Par Thomas Attin Tobias T. Tauböck |
| author_sort | Phoebe Burrer |
| collection | DOAJ |
| description | This study investigated the effect of over-etching and prolonged application time of a universal adhesive on dentin bond strength. Ninety extracted human molars were ground to dentin and randomly allocated into nine groups (G1–9; <i>n</i> = 10 per group), according to the following acid etching and adhesive application times. In the control group (G1), phosphoric acid etching was performed for 15 s followed by application of the universal adhesive Scotchbond Universal (3M) for 20 s, as per manufacturer’s instructions. In groups G2–5, both the etching and adhesive application times were either halved, doubled, quadrupled, or increased eightfold. In groups G6–9, etching times remained the same as in G2–5 (7.5 s, 30 s, 60 s, and 120 s, respectively), but the adhesive application time was set at 20 s as in the control group (G1). Specimens were then restored with a nanofilled composite material and subjected to microtensile bond strength testing. Bond strength data were statistically analyzed by ANOVA and Tukey’s post-hoc tests (α = 0.05). The relationship of bond strength with etching and adhesive application time was examined using linear regression analysis. Treatment of dentin with halved phosphoric acid etching and adhesive application times (G2) resulted in a significant bond strength decrease compared to the control group (G1) and all other test groups, including the group with halved acid etching, but 20 s of adhesive application time (G6). No significant differences in bond strength were found for groups with multiplied etching times and an adhesive application time of 20 s or more, when compared to the control group (G1). In conclusion, a universal adhesive application time of at least 20 s is recommended when bonding to over-etched dentin. |
| first_indexed | 2024-03-10T14:20:35Z |
| format | Article |
| id | doaj.art-8ae9b9cc9c114ba3876552070230562e |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T14:20:35Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-8ae9b9cc9c114ba3876552070230562e2023-11-20T23:24:55ZengMDPI AGPolymers2073-43602020-12-011212290210.3390/polym12122902Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond StrengthPhoebe Burrer0Hoang Dang1Matej Par2Thomas Attin3Tobias T. Tauböck4Clinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, SwitzerlandClinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, Plattenstrasse 11, 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, Plattenstrasse 11, 8032 Zurich, SwitzerlandClinic of Conservative and Preventive Dentistry, Center for Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, SwitzerlandThis study investigated the effect of over-etching and prolonged application time of a universal adhesive on dentin bond strength. Ninety extracted human molars were ground to dentin and randomly allocated into nine groups (G1–9; <i>n</i> = 10 per group), according to the following acid etching and adhesive application times. In the control group (G1), phosphoric acid etching was performed for 15 s followed by application of the universal adhesive Scotchbond Universal (3M) for 20 s, as per manufacturer’s instructions. In groups G2–5, both the etching and adhesive application times were either halved, doubled, quadrupled, or increased eightfold. In groups G6–9, etching times remained the same as in G2–5 (7.5 s, 30 s, 60 s, and 120 s, respectively), but the adhesive application time was set at 20 s as in the control group (G1). Specimens were then restored with a nanofilled composite material and subjected to microtensile bond strength testing. Bond strength data were statistically analyzed by ANOVA and Tukey’s post-hoc tests (α = 0.05). The relationship of bond strength with etching and adhesive application time was examined using linear regression analysis. Treatment of dentin with halved phosphoric acid etching and adhesive application times (G2) resulted in a significant bond strength decrease compared to the control group (G1) and all other test groups, including the group with halved acid etching, but 20 s of adhesive application time (G6). No significant differences in bond strength were found for groups with multiplied etching times and an adhesive application time of 20 s or more, when compared to the control group (G1). In conclusion, a universal adhesive application time of at least 20 s is recommended when bonding to over-etched dentin.https://www.mdpi.com/2073-4360/12/12/2902dentistrydentinphosphoric acid etchingbondinguniversal adhesivemicrotensile bond strength |
| spellingShingle | Phoebe Burrer Hoang Dang Matej Par Thomas Attin Tobias T. Tauböck Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength Polymers dentistry dentin phosphoric acid etching bonding universal adhesive microtensile bond strength |
| title | Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength |
| title_full | Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength |
| title_fullStr | Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength |
| title_full_unstemmed | Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength |
| title_short | Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength |
| title_sort | effect of over etching and prolonged application time of a universal adhesive on dentin bond strength |
| topic | dentistry dentin phosphoric acid etching bonding universal adhesive microtensile bond strength |
| url | https://www.mdpi.com/2073-4360/12/12/2902 |
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