Classification of impacted mandibular third molars using cone beam computed tomography based on neurological risks: N.R.C. - Nemsi, Hichem; Tellili, Neder; Bouanene, Ines; Tlili, Mohamed; Khenfir, Feten; Khalfi, Mohamed Salah; ben Amor, Feten (Médecine Buccale Chirurgie Buccale, 2017)