title: Volumetric fibular transfer planning with shape-based indicators in mandibular reconstruction.
abstract: In preoperative planning for mandibular reconstructive surgery, it is necessary to determine the osteotomy lines for fibular shaping and the proper placement of fibular segments in the mandible. Although virtual surgical planning has been utilized in preoperative decision making, current software designs require manual operation and a trial-and-error process to refine the reconstruction plan. We have developed volumetric fibular transfer simulation software that can quickly design a preoperative plan based on direct volume manipulation and quantitative comparison with the patient's original mandible. We propose three quantitative shape indicators-volume ratio, contour error, and maximum projection-for symmetrical lesions of the mandible, and have implemented a parallel computation algorithm for the semiautomatic placement of fibular segments. Using this virtual planning software, we conducted a retrospective study of the computed tomography data from nine patients. We found that combining direct volume manipulation with real-time local search of placement improved the applicability of the planning system to optimize mandibular reconstruction.
authors.forename: Megumi
authors.initials: M
authors.lastname: Nakao
authors.forename: Mamoru
authors.initials: M
authors.lastname: Hosokawa
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Imai
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Ueda
authors.forename: Toshihide
authors.initials: T
authors.lastname: Hatanaka
authors.forename: Tadaaki
authors.initials: T
authors.lastname: Kirita
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Matsuda
mesh_terms: D005360:Fibula / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000601:surgery* / Q000637:transplantation*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D063175:Mandibular Reconstruction / Q000379:methods*; D010027:Osteotomy; D019651:Plastic Surgery Procedures / Q000379:methods; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed