An internal distraction device for le Fort distraction osteogenesis: The NAVID system

Hideo Nakajima, Yoshiaki Sakamoto, Ikkei Tamada, Hirotoshi Ohara, Kazuo Kishi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Le Fort distraction osteogenesis is sometimes applied to improve the facial appearance in craniofacial dysostosis or cleft lip and palate. Distraction devices are generally classified into external and internal types. The movement of external distractors can be controlled easily but their large size and the need for a facial mask cause much psychological stress to the patient. Internal distractors are smaller and better tolerated, but they are not easily controllable and removal is difficult. We designed an internal distraction device to eliminate the problems of the currently available distractors -Nakajima's angle-variable internal distraction (NAVID) system - and aimed to assess its clinical applicability. Between 2000 and 2010, we treated 16 patients with the NAVID system: Le Fort I, III, III + I and IV distractions were performed in three, five, four and four patients, respectively. Distraction was started after a 1-week latency period. Then, the exposed rod was cut, and the distractors were left in place for 3 months or more as retention devices, and thereafter removed. All patients showed satisfactory occlusion and facial aesthetics. Open bite during the consolidation period was the main complication. In conclusion, the NAVID system is safe, effective and reliable for all types of Le Fort distraction osteogenesis.

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalJournal of Plastic, Reconstructive and Aesthetic Surgery
Issue number1
Publication statusPublished - 2012 Jan


  • Apert syndrome
  • Cleft lip
  • Crouzon syndrome
  • Distraction osteogenesis
  • Internal distraction device
  • Le Fort
  • Midface hypoplasia

ASJC Scopus subject areas

  • Surgery


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