Dimensional Variations and Spatial Distribution Regularities of Mandibular Incisive Canal and Its Impact on Safe Range of Bone Harvesting

doi:10.13701/j.cnki.kqyxyj.2021.02.015

Abstract

Abstract: Objective: To assess the dimensional variations and spatial distribution regularities of mandibular incisive canal (MIC) by means of CBCT, and to demonstrate its impact on safe range of bone harvesting. Methods: 160 semi-mandibles of 80 patients were recruited in this study. The CBCT data were reconstructed to evaluate the visibility, diameter, and location within the mandible of MIC. Results: The rate of the MIC identification had a range of 52.5%-77.4%, showing an upward tendency from the central incisor to the first premolar. The mean distance from MIC to the labial cortex were (3.74±1.23) mm in straight line and (3.54±1.18) mm in tangential direction respectively (P＜0.005). Conclusion: The MIC runs slightly downward from the foramen to the midline, with its diameter and visibility decreasing. It locates closer to the labial cortex as constantly as (3.54±1.18) mm in different tooth sites but remains below the link line of bilateral mental foramens with different level ranging from (3.79±1.78) mm to (8.41±2.91) mm. The harvesting of bone graft in the interforaminal region should be limited within the distance range.

Key words: mandibular incisive canal, cone beam CT, bone graft, neurological complication

YU Ti, ZHOU Qiao, HUANG Yuanding, JI Ping, HUANG Hong. Dimensional Variations and Spatial Distribution Regularities of Mandibular Incisive Canal and Its Impact on Safe Range of Bone Harvesting[J]. Journal of Oral Science Research, 2021, 37(2): 157-161.

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