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Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

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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...
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Reverse Total Shoulder Arthroplasty
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Distal Radius Hemiarthroplasty.

Brian D Adams1, Ericka A Lawler2, Taften L Kuhl2

  • 1Department of Orthopedic Surgery, Baylor College of Medicine, Houston, Texas.

Journal of Wrist Surgery
|July 29, 2016
PubMed
Summary
This summary is machine-generated.

Distal radius hemiarthroplasty offers a viable surgical option for active patients with severe wrist arthritis. This procedure, with or without a proximal row carpectomy (PRC), demonstrates good static wrist alignment in cadaver studies.

Keywords:
distal radius arthroplastydistal radius replacementwrist arthroplastywrist hemiarthroplastywrist replacement

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Area of Science:

  • Orthopedic surgery
  • Biomechanics
  • Arthroplasty

Background:

  • Total wrist arthroplasty (TWA) is often contraindicated in physically active patients due to the risk of implant loosening.
  • Distal radius hemiarthroplasty presents an alternative for active individuals with severe wrist arthritis, particularly those with specific degenerative patterns.

Purpose of the Study:

  • To evaluate the static alignment of the wrist following distal radius hemiarthroplasty with and without proximal row carpectomy (PRC) in a cadaver model.
  • To assess the suitability of distal radius hemiarthroplasty as a treatment for active patients with advanced wrist arthritis.

Main Methods:

  • Eight fresh-frozen cadaveric upper limbs were utilized.
  • Radiodense markers were implanted in the radius and hand.
  • Posteroanterior and lateral fluoroscopic images were captured before and after hemiarthroplasty and combined hemiarthroplasty with PRC procedures.

Main Results:

  • Hemiarthroplasty alone resulted in capitate positions within 1.42-2.21 mm (radial-ulnar) and 1.06 mm (dorsal-volar) of native alignment.
  • Combined hemiarthroplasty with PRC showed capitate positions within 4.69 mm (dorsal-volar) and significant longitudinal shortening.
  • Changes in longitudinal alignment after hemiarthroplasty alone were not statistically significant.

Conclusions:

  • Distal radius hemiarthroplasty, with or without PRC, provides acceptable static wrist alignment in a cadaver model.
  • The combined procedure is clinically relevant for preventing proximal carpal row instability and addressing radioscaphoid arthritis.
  • This approach supports distal radius hemiarthroplasty as a potential treatment for advanced wrist arthritis in active patients.