title: Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis for segmental mandibular defect after tumor ablative surgery: a case report.
abstract: OBJECTIVE
  This paper describes a case of secondary mandibular bone reconstruction performed to place dental implants. Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis were documented.
  
  
  METHODS
  The patient was a 51-year-old man with recurrent ameloblastoma of the mandible. Segmental mandibulectomy for tumor ablation and immediate mandibular reconstruction were performed. Because the volume of reconstructed bone was insufficient to place dental implants, trifocal distraction osteogenesis (vertical and horizontal distraction osteogenesis) was performed. Because the mandible had lost its continuity, osteosynthesis was performed simultaneously.
  
  
  RESULTS
  Through this procedure, the bone was well augmented. Absorption of the distracted bone was not seen. Adequate-length implants were placed.
  
  
  CONCLUSIONS
  Irregular trifocal distraction osteogenesis synchronized with osteosynthesis shortened the treatment period and produced stable bone augmentation for placement of dental implants. Therefore, this procedure could be indicated for complicated segmental mandibular bone defects.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan. mhirota@med.yokohama-cu.ac.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Hirota
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Chikumaru
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Matsui
authors.forename: Makoto
authors.initials: M
authors.lastname: Adachi
authors.forename: Shinjiro
authors.initials: S
authors.lastname: Aoki
authors.forename: Kei
authors.initials: K
authors.lastname: Watanuki
authors.forename: Tomomichi
authors.initials: T
authors.lastname: Ozawa
authors.forename: Toshinori
authors.initials: T
authors.lastname: Iwai
authors.forename: Iwai
authors.initials: I
authors.lastname: Tohnai
mesh_terms: D000540:Alveolar Ridge Augmentation / Q000379:methods*; D000564:Ameloblastoma / Q000601:surgery; D001860:Bone Plates; D001862:Bone Resorption; D016025:Bone Transplantation / Q000009:adverse effects; D003758:Dental Implantation, Endosseous; D004868:Equipment Failure; D016267:External Fixators; D006801:Humans; D019248:Jaw Fixation Techniques; D008297:Male; D008334:Mandible / Q000601:surgery*; D008337:Mandibular Fractures / Q000601:surgery; D008339:Mandibular Neoplasms / Q000601:surgery; D008875:Middle Aged; D019857:Osteogenesis, Distraction / Q000295:instrumentation* / Q000379:methods; D019651:Plastic Surgery Procedures / Q000295:instrumentation / Q000379:methods*