title: Treatment of Post-Traumatic Femoral Discrepancy With PRECICE Magnetic-Powered Intramedullary Lengthening Nails.
abstract: OBJECTIVE
  To evaluate the outcomes of lengthening post-traumatic femoral segments using a recently available magnetic intramedullary (IM) lengthening system.
  
  
  METHODS
  Retrospective cohort study.
  
  
  METHODS
  Urban level II Trauma Center.
  
  
  METHODS
  Patients treated for post-traumatic femoral shortening at our institution between 2012 and 2015. We identified 17 femurs lengthened (14 men and 3 women). The mean age was 30 years (range, 11-72 years).
  
  
  METHODS
  Magnetic IM lengthening system.
  
  
  METHODS
  Amount of lengthening achieved, consolidation index, and complications encountered.
  
  
  RESULTS
  The mean follow-up was 2.2 years (range, 1-3.7 years). Sixteen patients achieved the planned lengthening, a mean of 3.8 cm (range, 2.3-6.0 cm). Regenerate consolidation occurred at a mean of 119 days (range, 57-209 days). The mean consolidation index was 32 d/cm (range, 16-51 d/cm). Three patients (18%) experienced complications.
  
  
  CONCLUSIONS
  IM lengthening nails are an improvement over external fixators for treatment of post-traumatic femoral shortening. Within certain limits, their use can be extended to problems of limb-length discrepancy with angular/rotational deformity.
  
  
  METHODS
  Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.
authors.affiliation: *International Center for Limb Lengthening, Rubin Institute for Advanced Orthopedics, Sinai Hospital of Baltimore, Baltimore, MD; †Department of Orthopaedic Surgery, Al-Azhar University, Cairo, Egypt; and ‡Department of Orthopaedics, University of Maryland Medical Center, Baltimore, MD.
authors.forename: Ahmed I
authors.initials: AI
authors.lastname: Hammouda
authors.forename: Julio J
authors.initials: JJ
authors.lastname: Jauregui
authors.forename: Martin G
authors.initials: MG
authors.lastname: Gesheff
authors.forename: Shawn C
authors.initials: SC
authors.lastname: Standard
authors.forename: Janet D
authors.initials: JD
authors.lastname: Conway
authors.forename: John E
authors.initials: JE
authors.lastname: Herzenberg
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001852:Bone Lengthening / Q000295:instrumentation*; D001858:Bone Nails; D002648:Child; D005260:Female; D005264:Femoral Fractures / Q000150:complications* / Q000601:surgery; D005594:Fracture Fixation, Intramedullary / Q000295:instrumentation*; D006801:Humans; D007870:Leg Length Inequality / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult