Year :
2021
| Month :
March
| Volume :
15
| Issue :
3
| Page :
ZC01 - ZC06
Full Version
Effect of Bleaching with Strawberry Extract and Hydrogen Peroxide on Colour Change, Surface Morphology and Micro-Shear Bond Strength of Resin Composite to Enamel Surface
Published: March 1, 2021 | DOI: https://doi.org/10.7860/JCDR/2021/47070.14601
Rajith Radhakrishnan, Ravikumar Nesamani, Kavitha Sanjeev, Mahalaxmi Sekar
1. Postgraduate Student, Department of Conservative Dentistry and Endodontics, SRM Dental College and Hospital, Chennai, Tamil Nadu, India.
2. Reader, Department of Conservative Dentistry and Endodontics, SRM Dental College and Hospital, Chennai, Tamil Nadu, India.
3. Professor, Department of Conservative Dentistry and Endodontics, SRM Dental College and Hospital, Chennai, Tamil Nadu, India.
4. Head, Department of Conservative Dentistry and Endodontics, SRM Dental College and Hospital, Chennai, Tamil Nadu, India.
Correspondence Address :
Kavitha Sanjeev,
Professor, Department of Conservative Dentistry and Endodontics, SRM Dental
College and Hospital, Bharathi Salai, Ramapuram, Chennai, Tamil Nadu, India.
E-mail: researchkavi02@gmail.com
Abstract
Introduction: The search to replace the chemical bleaching agent namely the Hydrogen Peroxide (HP) with a natural substance to whiten the discoloured tooth is a need of the hour, due to the severe roughing and compromised bonding of resin composite to enamel surface by this agent.
Aim: To evaluate and compare the colour and surface changes in enamel surface, and the micro-shear bond strength of resin composite to enamel following bleaching with 35% HP and 2% Strawberry Extract (SE).
Materials and Methods: In this in-vitro study, 30 bovine maxillary central incisors were decoronated and allocated randomly to two groups: group 1 (negative control) (n=15) and group 2 (experimental) (n=15). To evaluate the bleaching efficacy, group 2 specimens were experimentally stained with tea. Baseline colour coordinates (pre-bleach values) (L*, a*, b*) (∆E) were recorded. The crowns were sectioned to obtain four equal parts to obtain 60 specimens and these were allotted randomly to 4 subgroups a, b, c, d (n=15 each) based on the bleaching protocol. Subgroup a, Hydrogen Peroxide (HP). subgroup b, Strawberry Extract (SE); subgroup c, HP+SE (HPS); subgroup d, HP/P (HP/ Proanthocyanidin). Following bleaching, colour coordinates (post-bleach values) (L*, a*, b*) (∆E) were measured as mentioned before. Qualitative analysis of the surface (n=2) for each group was performed using scanning electron microscopy. Micro-shear bond strength of resin composite to the treated specimens (n=13) was determined using universal testing machine at a crosshead speed of 1 mm/min. Kruskal-Wallis one-way Analysis of Variance (ANOVA) was used to calculate the p-value and Post-Hoc Tukey Honest significant Test (HSD) was used to identify the significant groups, p-value (<0.05).
Results: All the post-bleach specimens showed significantly higher mean ∆E (more whiter) values compared to their respective pre-bleach specimens (baseline values) (p-value -<0.05). Among the post-bleach groups, highest ∆E values (more whiter) were observed in subgroup 2c (HPS) (p-value=0.029). Similarly minimal morphological surface irregularities were observed in HPS. Group 1 (negative control) had the highest micro-shear bond strength compared to the experimental groups (group 2). Significantly, higher micro-shear bond strength was observed in subgroups 2b,c,d (SE, HPS, HPP) compared to subgroup 2a (HP) (p-value <0.001).
Conclusion: SE alone or in combination with HP is an efficient and effective dental bleaching agent.
Keywords
Antioxidant, Proanthocyanidin, Scanning electron microscopy, Tooth enamel
DOI: 10.7860/JCDR/2021/47070.14601
Date of Submission: Oct 05, 2020
Date of Peer Review: Nov 06, 2020
Date of Acceptance: Jan 12, 2021
Date of Publishing: Mar 01, 2021
AUTHOR DECLARATION:
• Financial or Other Competing Interests: None
• Was Ethics Committee Approval obtained for this study? Yes
• Was informed consent obtained from the subjects involved in the study? NA
• For any images presented appropriate consent has been obtained from the subjects. NA
PLAGIARISM CHECKING METHODS:
• Plagiarism X-checker: Oct 05, 2020
• Manual Googling: Dec 26, 2020
• iThenticate Software: Feb 06, 2021 (17%)
ETYMOLOGY: Author Origin
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