Authors Tazeen Zehra Department of Operative Dentistry, Liaquat College of Medicine and Dentistry https://orcid.org/0000-0002-2905-9933 Uzair Department of Operative Dentistry, Liaquat College of Medicine and Dentistry Aisha Department of Operative Dentistry, Liaquat College of Medicine and Dentistry Naheed Department of Paediatric Dentistry, Liaquat College of Medicine and Dentistry Araib Tahir Department of Operative Dentistry, Liaquat College of Medicine and Dentistry Shafaq Sarim Department of Paediatric Dentistry, Liaquat College of Medicine and Dentistry Asad Jiskani BDS Student, Liaquat College of Medicine and Dentistry Mohammad Samieh Faisal BDS Student, Liaquat College of Medicine and Dentistry DOI: https://doi.org/10.58397/6prk9t21 Keywords: Sodium Hypochlorite, EDTA,, Green Tea Extract,, Apical seal, smear layer Abstract

Objectives: To compare EDTA and Green Tea extracts as Root canal chelators on the basis of apical
seal of tooth root achieved.
Methods: This Quasi experimental study was conducted on single canal decoronated teeth of average 14mm length (n=20). Step back preparation was done with MAF of 40 # k file. Between every file change root canals were irrigated in group A with 5.25% NaOCl and the finishing rinse was done with 17% EDTA, in group B, between each file change root canals was irrigated with 5.25% NaOCl and the finishing rinse was done with 10% green tea extract. Green tea extract was prepared by boiling 15 g of green tea powder in 150 ml distilled water at 100°C, yielding 15 ml extract. Both groups were obturated. Application of nail varnish was done to the decoronated teeth leaving 2mm of apex. The teeth were immersed in 2% methylene blue dye solution for a week and the left to dry for 24 hrs. The teeth were vertically split and dye penetration was checked by mm scale.
Result: A total of 100 samples were included in the study, with 50 samples allocated to each of the two irrigation protocol groups: Group A (EDTA) and Group B (Green tea extract). Dye penetration was significantly lower in Group A (mean = 4.32 mm, SD = 1.64) compared to Group B (mean = 5.74 mm, SD = 1.43). Independent samples t-test showed this difference to be statistically significant (p =0.000).
Conclusion: Green tea extracts was demonstrated less efficacious than EDTA in achieving apical seal with a statistically significant difference. However, green tea extracts have demonstrated promising chelating, anti-inflammatory and antimicrobial properties further preclinical and clinical studies are needed to determine optimal formulation, ideal concentration, application protocols, to validate its clinical effectiveness

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