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Endodontics

Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis

Oral and maxillofacial surgery Osteosynthesis and simultaneous irregular trifocal distraction osteogenesis for segmental mandibular defect after tumor ablative surgery: a case report Makoto Hirota DDS, PhDa, , , Hiroshi Chikumaru DDS, PhDb, Yoshiro Matsui DDS, PhDa, Makoto Adachi DDS, PhDc, Shinjiro Aoki DDS, PhDa, Kei Watanuki DDS, PhDb, Tomomichi Ozawa DDS, PhDb, Toshinori lwai DDSc and Iwai Tohnai DDS PhDd a Associate Professor, Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan b Assistant Professor, Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan c Staff Doctor, Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan d Professor, Department of Oral and Maxillofacial Surgery, Yokohama City University Graduate School of Medicine, Yokohama, Japan 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. Patient 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. Conclusion 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.

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