Abstract: Objective　To explore the application effect and accuracy of craniomaxillofacial plastic surgery robot in genioplasty. Methods　The clinical data of 10 patients treated with traditional clinical genioplasty (clinical group) from January 2015 to December 2020 was retrospectively analyzed and compared with the data of their 1∶1 3D plaster model underwent genioplasty via cranio-maxillofacial plastic surgery robot (robot group). Based on the pre-experimental research data standards of our department, the ideal preoperative surgical scheme (control group) was designed using digital simulation software. The distance between pogonion and nasion, the distance between anterior nasal spine and menton, the distance between gnathion and mental foramen, and the distance between gonion and mental foramen, the distance from incision inferior, tip of lower canine and tip of the molar cheek groove to the line of osteotomy, the closest distance between screw and mental foramen were measured and compared among the three groups. Results　There were no statistical differences between the robotic group and control group in the postoperative measurement index (P>0.05), and there was a statistical difference between the clinical group and the control group in the postoperative measurement index (P<0.05). There was no statistical difference between robotic group and control group in line of osteotomy (P>0.05)，but there was a statistical difference between the clinical group and the control group in line of osteotomy (P<0.05). Compared with the robotic group, the closest distance between screw and mental foramen after operation was smaller in the clinical group. Conclusion　Compared with the actual operation of human hands, the cranio-maxillofacial plastic surgery robot can perform genioplasty more accurately.

Key words: Genioplasty, 　Robot, 　Digital technology, 　3D printing, 　Navigation