Tanmi, F.H. , Sheikh, M.A.H. , Hossain , M., Quader, S.A. , Ahmed, S. and Mohammad Shamsul Alam 2021. A comparative clinical study of bioceramic and calcium hydroxide based root canal sealer in the treatment of non-vital permanent tooth with periapical lesion . Update Dental College Journal. 11, 2 (Oct. 2021), 26–31. DOI:https://doi.org/10.3329/updcj.v11i2.56092.