Objective:This study aimed to reveal the distribution and course of the branches of the infraorbital nerve(IN),its communication relationship between the branches of the infraorbital nerve and facial nerve,so as to provide morphological basis for clinical implementation of accurate infraorbital nerve trunk in the infraorbital canal,regional facial anesthesia and facial surgery,so as to improve the success rate of maxillofacial surgery.Methods:25 adult cada-vers with formalin immobilized semi-face were selected.Exclude facial defect samples caused by tumor,trauma,deformity,surgery,etc.The length and diameter of the trunk of the infraorbital nerve and the length of the infraorbital canal were measured.The total number of infraorbital nerve and the number of branches were counted,and the course,distribution and communication relationship between infraorbital nerve and facial nerve were investigated.Results:The length of infraorbital nerve trunk ranged from 19.61 to 44.47 mm,with an average length of(23.33±4.95)mm.The length of infraorbital canal ranged from 9.49 to 31.21 mm,with an average length of(12.87±3.99)mm.The number of infraorbital nerve branches ranged from 5 to 12,and the average number was(7.29±2.29).The number of upper labial branches was the widest,ranging from 1 to 5,while the distribution area of eyelid branches was the narrowest.There are(were)a large number of intersections and anastomoses between the infraorbital nerve and the facial nerve,forming a complex multi-layer network structure.Conclusion:The infraorbital nerve trunk and the infraorbital canal va-ry in length.The number and distribution range of infraorbital nerve branches are not constant,and the communication relationship between infraorbital nerve and facial nerve is complicated.
维普
万方数据