How to Reconstruct Mandibular Defect Within 2mm Deviation Rapidly?

Objectives: we aimed to improve the accuracy and efficiency during bony graft reconstruction for segmental mandibular defection.
Methods: We analyzed the main influence factors for rapid and accurate bony reconstruction that guided by patient-specific 3D printed plates: 1.Positioning deviation; 2.osteotomy loss; 3.reposition displacement. And then designed totally new cutting and reconstructive plates to avoid those deviations and displacement. The postoperative results were compared with the preoperative design in 3D level and then analyzed statistically.
Results: All patients got successful bony reconstruction with symmetrical face appearance and viable bony graft and no operative complications. The duration for bony parts reposition was less than 3 minutes and the deviation for all patients was less than 2mm. More specifically: 1.Integrated osteotomy guide plate reduced the average deviation to 1.409mm±1.468mm; 2.integrated positioning hole plate reduced the average deviation to 1.27mm±1.73mm; 3.In situ shaping guide plate reduced the average deviation to 1.36mm±1.74mm. And in all, the postoperative hospital stay was reduced to 10.6 days compared to previous 13.4 days (p=0.029, N=10), and the operation time was reduced to 344minutes compared to previous 410minutes (p=0.018, N=10).
Conclusions: Conclusion: The new designed, patient specific, integrated cutting and reconstructive plates can simplify the difficulty of operation, reduce intraoperative deviation, shorten the operation and hospital stay time and improve surgical efficiency and accuracy.