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Radial head endoprosthesis implantation effectively restores elbow function after severe fractures, showing good outcomes and stability. Careful implant sizing is crucial for successful treatment and to minimize potential complications like loosening.

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Area of Science:

  • Orthopedic Surgery
  • Traumatology
  • Biomaterials and Implants

Background:

  • Treatment for multi-fragmented, non-reconstructible radial head fractures lacks a standardized procedure.
  • Radial head endoprosthesis implantation is a viable option, but consensus on its efficacy is limited.
  • This study evaluates the one-year postoperative outcomes of radial head endoprosthesis use.

Purpose of the Study:

  • To assess the functional outcomes of radial head endoprosthesis implantation for complex fractures.
  • To evaluate the safety and complication profile of this treatment method.
  • To gain clinical experience with the ExploR® radial head endoprosthesis.

Main Methods:

  • Eight patients with comminuted radial head fractures (3-6 fragments), some with dislocations, received ExploR® radial head endoprostheses.
  • Surgical approach via Kocher's interval, followed by a two-to-three-week plaster splint immobilization.
  • Outcomes assessed at a mean of 13 months post-surgery using range of motion, stability, DASH, and Mayo Elbow Performance Score (MEPS).

Main Results:

  • Good functional recovery observed: mean flexion 136.9°, supination 86.3°, pronation 80.0°.
  • High functional scores: mean DASH 11.2, mean MEPS 92.5, with maintained elbow stability and no neurological deficits.
  • Complications included implant loosening (3 cases), bone resorption (2 cases), and heterotopic ossification (2 cases).

Conclusions:

  • Radial head endoprosthesis implantation is effective for comminuted fractures, restoring function and preventing instability.
  • Adequate implant size selection is critical for successful outcomes.
  • Radiological signs of loosening may not always impact functional results, warranting further long-term follow-up.