Devices & Techniques: Bone Transport
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Fedotov used an extraoral semicircular apparatus for bone transport (Fedotov, 1997). He presented the results of treating 22 patients with posttraumatic defects varying in size from 10 to 180 mm. For the patients with mandibular defects ranging from 3.5 to 4.0 cm, monofocal distraction osteogenesis was used. In these cases, 12 days of unidirectional compression was applied between the bone segments. At that time, a callus had formed and the bone segments were gradually separated in order to produce distraction regenerate. Bone defects ranging from 4.0 to 5.5 cm were an indication for bifocal mandibular bone transport. A transport disk was osteotomized from the residual bone segment and, after an appropriate latency period, gradually moved from one end of the bone defect to the other. A trifocal distraction osteogenesis technique was used for larger mandibular defects. In these situations, two transport disks were created and distracted until they were united. Distraction was then discontinued and compression was applied to the two transport disks at the docking site. After apparatus removal, all patients had satisfactory anatomic and functional results.

FIG. 3.2.8. Fedotov's semicircular apparatus for bone transport. Reproduced with permission from Fedotov SN. Dosed distraction of the mandible fragments by extra-mouth apparatus in patients with bone defect and mandible fractures. In: Diner PA, Vazquez MP (eds). International congress on cranial and facial bone distraction processes. Paris, France, June 19-21, 1997. Bologna, Italy:Monduzzi Editore S.p.A., 1997:155-160.

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