‘N-Angle’: Clinical Indicator for Predictable Insertion of Ramal Bone Screws

Introduction: The primary concern in the placement of ramal bone screws is blind nature procedure, as there a thick, mobile layer soft tissue over bone; also, ramus not uniplanar structure but swerving like propeller blade. purpose this study was to evaluate possibility establishing clinical guidelines based on visible dental and soft-tissue landmarks for safe, reliable, accurate insertion screws. Aims Objectives: Our objective angle formed between appropriate direction ramal-implant line tangential buccal surfaces first second permanent molars. secondary average distance neurovascular bundle from tip screw. Materials Methods: We obtained 80 cone beam computed tomography (CBCT) samples, marked reference lines points selected axial coronal sections, evaluated following parameters using software’s linear- angular-measurement device: screw molars; proximity bundle. Results: constructed occlusal line, our study, 19.04 (SD ± 6.89) degrees. 7.1773 1.73988) mm. Conclusion: can conclude that be placed with comfortable margin safety.