Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study
Objective: The primary objective was to assess and compare the shear bond strength of orthodontic brackets bonded on bleached enamel with and without using an anti-oxidizing agent.The secondary objective was to compare the shear bond strength of brackets between the groups with anti-oxidant applicat...
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Elsevier
2022-01-01
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| Series: | Journal of Oral Biology and Craniofacial Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212426821001421 |
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| author | Sakshi Tiwari Garadappagari Dharmadeep K. Sadashiva Shetty Deepthi Shiri |
| author_facet | Sakshi Tiwari Garadappagari Dharmadeep K. Sadashiva Shetty Deepthi Shiri |
| author_sort | Sakshi Tiwari |
| collection | DOAJ |
| description | Objective: The primary objective was to assess and compare the shear bond strength of orthodontic brackets bonded on bleached enamel with and without using an anti-oxidizing agent.The secondary objective was to compare the shear bond strength of brackets between the groups with anti-oxidant application along with immediate bonding and that of delayed bonding without any anti-oxidant treatment, on bleached teeth. Materials & methods: 75 premolars were collected and thereafter randomly distributed into the 5 groups. Group 1 to 4 had undergone bleaching with 10% carbamide peroxide and group 5 was control. Group 1 was bonded immediately after bleaching while bonding was delayed in group 4 for a period of 1 week. Groups 2 and 3 received the anti-oxidant treatment with 10% sodium ascorbate gel and 10% green tea gel respectively. Hounsfield universal testing machine was used for testing the shear bond strength. Results: For group 1, the shear bond strength was significantly lower (mean 4.9 MPa) than group 5 (mean 12.5 MPa). The significant differences were observed on comparing the shear bond strength of antioxidant-treated and delayed bonding groups with control (p < 0.05). Mean shear bond strength in groups 2, 3 and 4 were 7.5 MPa, 9.6 MPa and 5.8 MPa respectively. Conclusion: The bond strength of brackets reduces immediately after the bleaching procedure. The bond strength can be reversed either by delaying the bonding for a period of 1 week or by using the anti-oxidizing agents but it is not up to the level of unbleached enamel. |
| format | Article |
| id | doaj-art-0e985595caed4e218329dc6ed668a6ba |
| institution | DOAJ |
| issn | 2212-4268 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
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| series | Journal of Oral Biology and Craniofacial Research |
| spelling | doaj-art-0e985595caed4e218329dc6ed668a6ba2025-08-20T02:50:29ZengElsevierJournal of Oral Biology and Craniofacial Research2212-42682022-01-0112120420710.1016/j.jobcr.2021.12.003Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro studySakshi Tiwari0Garadappagari Dharmadeep1K. Sadashiva Shetty2Deepthi Shiri3Department of Orthodontics & Dentofacial Orthopedics, G Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, India; Corresponding author.Department of Orthodontics & Dentofacial Orthopedics, G Pulla Reddy Dental College and Hospital, Kurnool, Andhra Pradesh, IndiaDepartment of Orthodontics & Dentofacial Orthopedics, Bapuji Dental College & Hospital, Davangere, Karnataka, IndiaDepartment of Orthodontics & Dentofacial Orthopedics, Bapuji Dental College & Hospital, Davangere, Karnataka, IndiaObjective: The primary objective was to assess and compare the shear bond strength of orthodontic brackets bonded on bleached enamel with and without using an anti-oxidizing agent.The secondary objective was to compare the shear bond strength of brackets between the groups with anti-oxidant application along with immediate bonding and that of delayed bonding without any anti-oxidant treatment, on bleached teeth. Materials & methods: 75 premolars were collected and thereafter randomly distributed into the 5 groups. Group 1 to 4 had undergone bleaching with 10% carbamide peroxide and group 5 was control. Group 1 was bonded immediately after bleaching while bonding was delayed in group 4 for a period of 1 week. Groups 2 and 3 received the anti-oxidant treatment with 10% sodium ascorbate gel and 10% green tea gel respectively. Hounsfield universal testing machine was used for testing the shear bond strength. Results: For group 1, the shear bond strength was significantly lower (mean 4.9 MPa) than group 5 (mean 12.5 MPa). The significant differences were observed on comparing the shear bond strength of antioxidant-treated and delayed bonding groups with control (p < 0.05). Mean shear bond strength in groups 2, 3 and 4 were 7.5 MPa, 9.6 MPa and 5.8 MPa respectively. Conclusion: The bond strength of brackets reduces immediately after the bleaching procedure. The bond strength can be reversed either by delaying the bonding for a period of 1 week or by using the anti-oxidizing agents but it is not up to the level of unbleached enamel.http://www.sciencedirect.com/science/article/pii/S2212426821001421BleachingAnti-oxidantShear bond strength |
| spellingShingle | Sakshi Tiwari Garadappagari Dharmadeep K. Sadashiva Shetty Deepthi Shiri Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study Journal of Oral Biology and Craniofacial Research Bleaching Anti-oxidant Shear bond strength |
| title | Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study |
| title_full | Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study |
| title_fullStr | Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study |
| title_full_unstemmed | Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study |
| title_short | Effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel: An in-vitro study |
| title_sort | effect of green tea and sodium ascorbate on the shear bond strength of orthodontic brackets bonded on bleached enamel an in vitro study |
| topic | Bleaching Anti-oxidant Shear bond strength |
| url | http://www.sciencedirect.com/science/article/pii/S2212426821001421 |
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