Abazarpour, R., Parirokh, M., Farhadi, A., Jalali, Z., & Kheirabadi, N. (2017). Successful Ultra-Conservative Management of a Mandibular Premolar with Dens Invaginatus. Iranian Endodontic Journal, 12(3), 390–395. https://doi.org/10.22037/iej.v12i3.16559