Abstract: PURPOSE: To investigate the principle of occlusion plane priority during jaw reconstruction for accurate occlusion guided jaw reconstruction and prosthesis restoration, and provide guidance for clinical practice. METHODS: Virtual surgical plans were draw up and the occlusion plane was determined as the reference plane. Jaw reconstruction and implant-retained prostheses were completed with the guidance of occlusion plane. The accuracy of mandibular reconstruction and implant placement was analyzed with CT data preoperatively and 1 month and 6 months postoperatively, the distribution of occlusal force was measured and compared. RESULTS: One month postoperatively, the accuracy of maxillary reconstruction with fibular and iliac bone grafts was (90.28±0.29)% and (89.87±0.41)%, respectively; while the accuracy for mandible reconstruction was (82.21±0.32)% and (89.52±0.18)%. The accuracy of implant placement in maxilla and mandible was (91.72±0.21)% and (86.07±0.26)%, respectively. Six months postoperatively, the accuracy of maxillary reconstruction with fibular and iliac bone grafts was (89.24±0.20)% and (89.86±0.37)%, respectively; while the accuracy for mandible reconstruction was (75.39±0.25)% and ( 85.02±0.17)%. The accuracy of implant placement in maxilla and mandible was (90.22±0.27)% and ( 85.57±0.31)%, respectively. The occlusal force distribution of unilateral defect was (68.14±8.32)% and (35.22±5.73)% in the unaffected and affected side, respectively, while (52.18±1.75)% and (47.82±2.41)% in the left and right side for bilateral defects, respectively. CONCLUSIONS: Occlusion guided jaw reconstruction can be predetermined by the space location of bone grafts and the site and direction of implants, and finally achieve accurate occlusion reconstruction and masticatory function, which can be a powerful guarantee for functional reconstruction of the maxilla and mandible.

Key words: Occlusion plane, Occlusion guide, Jaw reconstruction, Alveolar priority