| Summary: | 碩士 === 國立中央大學 === 機械工程研究所 === 99 === The difficulties of second mandibular reconstruction come from the restore of the remnant mandibular relative position, the measurement of the defect size, the determination of the fibula bone segment, the guidance of the fibula bone saw, and the mandibular reconstruction of the ideal shape.
In this research, we reconstructed 3D mandible model from CT images to make a paper model similar to the mandibular, and used the paper model as a reference to bending the metal plate, and the plate fixed relative position of remaining mandibular in the actual operation. The remnants of mandible have obtained the transformation between the original mandibles through the Initial Contraposition and Iterative Closest Point (ICP) algorithm.then, the remaining mandibleof the recovery position would be decided the size of the injured part, and be planed the number of segments making fibula. We designed the assistive devices to measure the range of the injured mandible. In addition, we guided cutting the fibula in order to complete mandibular reconstruction, and assistive devices also used for the initial mandibular reconstruction.
In the second mandibular reconstruction, we not only used the paper models as a reference to bending metal plate, but also simulation the contraposition of the remaining mandible. According to this research results, the distance of corresponding point was up to 5.04mm. The gap between the segments of two neighboring fibula was less than 1 mm, while we used the assistive devices to guided the fibulas operation.
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