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Related Experiment Video

Updated: May 10, 2025

An Intramedullary Locking Nail for Standardized Fixation of Femur Osteotomies to Analyze Normal and Defective Bone Healing in Mice
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Bent Intramedullary Metacarpal Implants.

Arin A Drtil1, Whitaker C Reid2, William F Pientka1,2

  • 1JPS Health Network, Fort Worth, TX, USA.

Hand (New York, N.Y.)
|April 26, 2025
PubMed
Summary
This summary is machine-generated.

Intramedullary fixation for metacarpal fractures can lead to implant bending, particularly after punching injuries. This complication suggests avoiding this fixation method in patients with a history of closed-fist striking.

Keywords:
bentfailureintramedullarymetacarpalscrew

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Area of Science:

  • Orthopedic surgery
  • Traumatology
  • Biomedical engineering

Background:

  • Metacarpal fractures are common and require effective treatment to prevent long-term disability.
  • Intramedullary fixation is increasingly used for metacarpal fractures, offering early mobilization benefits.

Purpose of the Study:

  • To evaluate the incidence and causes of hardware failure in metacarpal fractures treated with intramedullary fixation.
  • To identify risk factors and propose management strategies for implant complications.

Main Methods:

  • Retrospective review of 90 patients with metacarpal fractures treated with intramedullary implants (August 2018-February 2024).
  • Analysis of medical records and radiographs to identify hardware failure (bent implants).
  • Recording of re-injury mechanisms in cases of implant failure.

Main Results:

  • Five patients (7 screws) experienced implant bending, all linked to a punching mechanism.
  • All patients with hardware failure had initial fractures from punching injuries.
  • The time to implant failure ranged from 4 weeks to 7 months post-surgery.

Conclusions:

  • Bent implants are a notable complication of intramedullary fixation for metacarpal fractures.
  • A history of closed-fist striking is identified as a potential contraindication for intramedullary metacarpal fixation.
  • A strategy for implant removal in cases of complication is presented.