Results of a Novel Technique for Increasing  Bone Contact and Stability in Mandibular Reconstruction with Micro-vascularized Fibula Flap.

BACKGROUND: Reconstruction of large mandibular defects requires reestablishment of mandibular continuity with bone and soft tissue. The microvascularized fibula flap (MFF) has the advantage of providing both, with adequate length, low resorption rate, low infection risk and possibility of dental implant insertion. It can be adapted to mandibular defects in many different ways.

PURPOSE: This retrospective study will present and evaluate the results of the male-female joint technique for flap positioning and fixation.

METHODS: The technique consists of designing osteotomies on the binding edge of the MFF and recipient jaw, increasing bone contact from one to five faces. Patients submitted to mandibular reconstruction through this technique were included and evaluated regarding systemic compromise, complication occurrence as well as primary and long-term stability.

RESULTS: Ten patients underwent mandibular reconstruction with the male-female joint technique. Sixteen joints were applied, and excluding an early loss due to vascular failure, all remaining 14 joints healed uneventfully. None showed signs of early or late mobility.

CONCLUSION: Fitting the MFF through a male-female joint that provides greater bone contact may improve stability and reduce screw loosening and mini-plate removal rates.