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Related Experiment Video

Updated: Mar 21, 2026

Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner
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Femoral Distraction Osteogenesis in Fibular Hemimelia: Risks and Advantages Using Magnetically Driven Antegrade

Adrien Frommer1, Igor Porokhovnikov, Georg Gosheger

  • 1From the Pediatric Orthopedics, Deformity Reconstruction and Foot Surgery, Muenster University Hospital, Muenster, Germany (Frommer, Porokhovnikov, Vogt, Laufer, Tretow, Roedl, and Toporowski), and the General Orthopedics and Tumor Orthopedics, Muenster University Hospital, Muenster, Germany (Frommer, Gosheger, Laufer, and Toporowski).

The Journal of the American Academy of Orthopaedic Surgeons
|March 20, 2026
PubMed
Summary

Fibular hemimelia (FH) treatment using magnetically controlled femoral lengthening nails precisely corrects leg length discrepancy (LLD). While effective, patients may experience complications like knee stiffness, necessitating careful patient selection and management.

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Area of Science:

  • Orthopedic surgery
  • Pediatric orthopedics
  • Limb reconstruction

Background:

  • Fibular hemimelia (FH) is a rare congenital lower limb deficiency causing leg length discrepancy (LLD).
  • Femoral distraction osteogenesis is a standard reconstructive method for LLD over 2 cm.

Purpose of the Study:

  • To evaluate the efficacy and safety of antegrade femoral distraction osteogenesis using magnetically controlled intramedullary nails in FH patients.
  • To assess accuracy, precision, reliability, and complication rates of this technique.

Main Methods:

  • Twenty-three FH patients underwent antegrade femoral lengthening with magnetic intramedullary nails (2018-2021).
  • Outcomes measured included LLD correction, distraction/consolidation indices, accuracy, precision, reliability, and complications.
  • Median follow-up was 39 months.

Main Results:

  • Median LLD reduced from 45 mm to 9 mm (P < 0.001) after a median 40 mm distraction.
  • Lengthening accuracy was 91% ± 8%, precision 91%, distraction index 0.8 mm/d, and consolidation index 36 d/cm.
  • Complications occurred in 70% (knee stiffness, pain), with 17% requiring further surgery; all resolved without permanent issues. Treatment reliability was 96%.

Conclusions:

  • Magnetically driven femoral lengthening nails offer precise and reliable correction of LLD in FH.
  • High distraction accuracy is achieved, but a significant complication rate highlights the need for careful patient selection and postoperative care.