Minh, N.T.H. and Minh, H.T.Q. 2022. 21. The effectiveness of guided tissue regeneration treartment for furcation defect in mandible molars. Journal of Medical Research. 154, 6 (Jun. 2022), 169-175. DOI:https://doi.org/10.52852/tcncyh.v154i6.887.