Value of preoperative mandibular plating in reconstruction of the mandible.

BACKGROUND

The purpose of this study was to evaluate the efficacy of preoperative versus intraoperative mandibular contouring using rapid prototyping technology.

METHODS

Ten patients requiring mandibular reconstruction had a preoperative mandibular plate contoured to a fabricated 3D mandibular model based on preoperative imaging. A traditional intraoperative plate was also contoured. Two surgeons blinded to the study compared the plates with respect to conformance, surface-area contact, and best overall match. A cost-benefit analysis was then performed.

RESULTS

The average time to contour was 867 ± 243 seconds and 833 ± 289 seconds for the preoperative and intraoperative plates, respectively (p = .83). Interobserver analysis revealed no statistically significant differences in conformance (p = .38) or surface area contact (p = .14). In 7 of 9 cases, the preoperative plate was selected for the final reconstruction. In 1 case, an intraoperative plate was not contoured because of the lateral extent of the tumor.

CONCLUSION

In cases of mandibular distortion secondary to disease, pathologic fracture or defects involving multiple mandibular subsites this method is particularly advantageous.