Analysis of Mandibular Incisive Canals with Critical Clinical and Anatomic Landmarks in a Chinese Population: A Cross-sectional Study

A safety depth of 16 mm below the CEJ of adjacent teeth may avoid 91.6% neurovascular injuries in implant placements. The facts that 83.9% and 9.4% of MIC located within 10 mm to root apices and the inferior margin of mandible, and 27.3% of MIC located less than 3 mm deep to the labial cortical plate in the anterior mandible, pose neurovascular injury risk in chin bone harvesting. The 95.5% of MLC with a diameter of more than 1 mm alert us to limit lingual flap elevation to avoid injuring vessels in the MLC and prevent postoperative bleeding. To avoid nerve injury and postoperative hematoma, a meticulous evaluation of the course of MIC is recommended rather than relying on a fixed marginal safety value.