Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives?
Abstract Objectives The objective of this in vitro study was to evaluate whether a reduced phosphoric acid etching time would have an impact on the microtensile bond strength (µTBS) of different universal adhesives to dentin using a bulk-fill composite. Methods Forty-eight freshly extracted non-cari...
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2025-03-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-025-05602-5 |
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| author | Elif Öztürk Omer Taha Meric Dilek Helvacioglu-Yigit |
| author_facet | Elif Öztürk Omer Taha Meric Dilek Helvacioglu-Yigit |
| author_sort | Elif Öztürk |
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| description | Abstract Objectives The objective of this in vitro study was to evaluate whether a reduced phosphoric acid etching time would have an impact on the microtensile bond strength (µTBS) of different universal adhesives to dentin using a bulk-fill composite. Methods Forty-eight freshly extracted non-carious human molars were immersed in acrylic resin and cut to a height of 4 mm from the highest tubercle crest towards the cervical region. Dentin surfaces were subjected to 37% phosphoric acid pretreatment for 0, 3, or 15 s (s), rinsed with water for 20 s and gently dried, and wet-bonded. Two universal adhesives (Single Bond Universal, 3 M-ESPE; Adhese Universal, Ivoclar Vivadent) were used in this study. The Tofflemire matrix was added to each tooth, and a bulk-fill resin composite (Tetric EvoCeram Bulk-Fill, Ivoclar Vivadent) with a thickness of 5 mm was applied. The tooth composite blocks were cured using a light-emitting diode unit for either 20–40 s. Twelve groups were included (four teeth per group). All samples were immersed in distilled water for 24 h at 37°C. The samples were sectioned under water cooling to obtain multiple sticks approximately 1.0 × 1.0 × 8 mm3 in size using a non-trimming technique with water cooling. The µTBS test was performed (n = 20 sticks for each group). The data were analysed via a Welch analysis of variance (ANOVA) and the Games–Howell post hoc test (SPSS 23.0). The interactions between the three factors were analysed with a three-way ANOVA. Results Significant differences were observed among the experimental groups (p < 0.05). Both adhesives exhibited the highest bond-strength values in the groups for which acid was applied to the dentin for 3 s and the composite resin was light-cured for 40 s, resulting in statistically significantly higher values for these two groups compared with the other groups (p < 0.05). Conclusion Reducing the etching time to 3 s compared to the traditional etching time of 15 s increased the micro-tensile bond strength of the bulk-fill composite to dentin using universal adhesives. |
| format | Article |
| id | doaj-art-902aeb8ee5594157abcea05a166fdb57 |
| institution | DOAJ |
| issn | 1472-6831 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Oral Health |
| spelling | doaj-art-902aeb8ee5594157abcea05a166fdb572025-08-20T02:40:43ZengBMCBMC Oral Health1472-68312025-03-012511710.1186/s12903-025-05602-5Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives?Elif Öztürk0Omer Taha Meric1Dilek Helvacioglu-Yigit2Faculty of Dentistry, Department of Restorative Dentistry, Hacettepe UniversitySpecialist Dentist in Restorative Dentistry, Sincan ADSMCollege of Dental Medicine, QU Health, Qatar UniversityAbstract Objectives The objective of this in vitro study was to evaluate whether a reduced phosphoric acid etching time would have an impact on the microtensile bond strength (µTBS) of different universal adhesives to dentin using a bulk-fill composite. Methods Forty-eight freshly extracted non-carious human molars were immersed in acrylic resin and cut to a height of 4 mm from the highest tubercle crest towards the cervical region. Dentin surfaces were subjected to 37% phosphoric acid pretreatment for 0, 3, or 15 s (s), rinsed with water for 20 s and gently dried, and wet-bonded. Two universal adhesives (Single Bond Universal, 3 M-ESPE; Adhese Universal, Ivoclar Vivadent) were used in this study. The Tofflemire matrix was added to each tooth, and a bulk-fill resin composite (Tetric EvoCeram Bulk-Fill, Ivoclar Vivadent) with a thickness of 5 mm was applied. The tooth composite blocks were cured using a light-emitting diode unit for either 20–40 s. Twelve groups were included (four teeth per group). All samples were immersed in distilled water for 24 h at 37°C. The samples were sectioned under water cooling to obtain multiple sticks approximately 1.0 × 1.0 × 8 mm3 in size using a non-trimming technique with water cooling. The µTBS test was performed (n = 20 sticks for each group). The data were analysed via a Welch analysis of variance (ANOVA) and the Games–Howell post hoc test (SPSS 23.0). The interactions between the three factors were analysed with a three-way ANOVA. Results Significant differences were observed among the experimental groups (p < 0.05). Both adhesives exhibited the highest bond-strength values in the groups for which acid was applied to the dentin for 3 s and the composite resin was light-cured for 40 s, resulting in statistically significantly higher values for these two groups compared with the other groups (p < 0.05). Conclusion Reducing the etching time to 3 s compared to the traditional etching time of 15 s increased the micro-tensile bond strength of the bulk-fill composite to dentin using universal adhesives.https://doi.org/10.1186/s12903-025-05602-5Acid etching timeBulk-fill compositeDentinMicro-tensile bond strengthUniversal adhesives |
| spellingShingle | Elif Öztürk Omer Taha Meric Dilek Helvacioglu-Yigit Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? BMC Oral Health Acid etching time Bulk-fill composite Dentin Micro-tensile bond strength Universal adhesives |
| title | Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? |
| title_full | Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? |
| title_fullStr | Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? |
| title_full_unstemmed | Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? |
| title_short | Does reducing the acid-etching time increase the micro-tensile bond strength of a bulk fill composite to dentin using different universal adhesives? |
| title_sort | does reducing the acid etching time increase the micro tensile bond strength of a bulk fill composite to dentin using different universal adhesives |
| topic | Acid etching time Bulk-fill composite Dentin Micro-tensile bond strength Universal adhesives |
| url | https://doi.org/10.1186/s12903-025-05602-5 |
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