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Related Experiment Video

Updated: Jul 17, 2026

Reverse Total Shoulder Arthroplasty
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Published on: July 5, 2011

Radiographic findings after radial head replacement.

Gopal R Lalchandani1, Matthew Cherches1, Ryan T Halvorson1

  • 1UCSF Department of Orthopedic Surgery, 500 Parnassus Avenue, MU 320-W, San Francisco, CA, 94143, USA.

Journal of Orthopaedic Surgery and Research
|July 16, 2026
PubMed
Summary

Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a short...

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Mid-term follow-up after radial head arthroplasty (RHA) shows frequent radiographic changes like stress shielding and radiolucency. While often mild, male gender and bipolar implants may reduce radiocapitellar arthritis.

Area of Science:

  • Orthopedic surgery
  • Biomechanical engineering
  • Radiology

Background:

  • Radial head arthroplasty (RHA) is a primary treatment for unreconstructable radial head and neck fractures.
  • Mid- to long-term follow-up can reveal complications like loosening, stress shielding, and radiocapitellar arthritis.

Purpose of the Study:

  • To analyze and quantify radiographic findings following primary RHA.
  • To investigate the mid-term radiographic outcomes of radial head arthroplasty.

Main Methods:

  • Retrospective review of 63 elbows (62 patients) undergoing RHA (2006-2019) with >= 6 months follow-up.
  • Evaluation of associated injuries, fracture patterns, implant design, radiolucency, stress shielding, arthritis, and heterotopic ossification.
  • Independent radiographic review by two orthopedic surgeons; regression analysis for associations.
Keywords:
ElbowHeterotopic ossificationOsteolysisRadial head arthroplastyRadiocapitellar arthritisRadiolucencyStress shielding

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Main Results:

  • 82.5% of patients exhibited at least one radiographic finding at mid-term follow-up; most were mild.
  • Stress shielding (58.7%) and radiolucency (27.0%) were the most common findings.
  • Male gender and bipolar implant use were associated with reduced radiocapitellar arthritis.

Conclusions:

  • Radiographic changes are common after RHA but typically mild and not indicative of clinical failure.
  • Male sex and bipolar implants may offer protection against developing radiocapitellar arthritis.
  • Further research is needed to determine the clinical significance of these radiographic findings.