Shrestha, S., Sapkota, M. R., Shah, A., Rajbhandari, S., & Sapkota, P. (2017). Occurrence of Second Mesio-buccal Canal in Maxillary First Permanent Molar: A CBCT Study. Orthodontic Journal of Nepal, 7(1), 39–43. https://doi.org/10.3126/ojn.v7i1.18901