COBRA™ Distal Radius Hemiarthroplasty

  • Indicated for highly comminuted fractures 
  • Useful in lower-demand patients 
  • Available in asymmetrical left and right-sided versions 
  • Uncemented available in 2 sizes 

About COBRA™ Distal Radius Hemiarthroplasty

The COBRA™ is a hemiarthroplasty prosthesis for conditions of the wrist. 

  • Indicated for highly comminuted fractures of the distal radius. 
  • Useful in lower-demand patients.
  • Available in asymmetrical left and right-sided versions to reproduce the offset of the radius and radial styloid. 
  • Anatomical prosthesis are available in either cemented or uncemented versions along with a double coating of porous titanium and hydroxyapatite. 
  • Compact, streamlined instrument kit 


If you would like more information regarding COBRA™ Distal Radius Hemiarthroplasty.

Interested in the COBRA™ Distal Radius Hemiarthroplasty ?

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    Two Lateral Fins

    2 lateral fins for initial implant stability.  Suture attachment holes on each fin allow for the reconstruction of bone fragments.

    Two Sizes of Implants

    Uncemented is available in 2 sizes. The cemented implant can be used in poor bone quality to keep the length of the radius. 

    This pioneering system from Groupe Lépine is part of a range that also includes 

    MAÏA™ Carpometacarpal Prosthesis

    The MAÏA™ CMCJ replacement from Groupe Lépine is designed for the surgical treatment of basal thumb osteoarthritis.

    INCA™ STT Prosthesis

    The INCA™ is designed to treat scaphotrapeziotrapezoid osteoarthritis. It is a resurfacing implant of the distal pole of the scaphoid.
    Groupe Lepine

    Groupe Lépine is a French family company who have been pioneering to be the leading partner of the medical world since 1714. Based in Genay, near Lyon, Groupe Lépine currently operates with 450 working employees across 8 operational sites. Groupe Lépine products are available in more than 30 countries around the world with LEDA being the leading distributor of the COBRA™,MAÏA™, INCA™ and MEMOFIX™. 


    Frequently Asked Questions

    • Cobalt–chromium–molybdenum alloy
    • Highly-polished inner surface. 
    • Sterilized by gamma irradiation. 

    During the procedure, the surgeon should be seated distal to the hand so as to be able to better control the position of the implant relative to the radius in the transverse plane. 

    • The surgical approach is dorsal longitudinal in the midline of the wrist, in line with the third metacarpal.
    • The third dorsal extensor compartment is exposed and opened longitudinally. 
    • Care is taken not to injure the dorsal intercarpal ligament. 

     For more information on the hemiarthroplasty prosthesis procedure using the COBRA™, download the full surgical brochure which includes the surgical approach, fracture exposure, broaching, insertion, and postoperative management. 

    A comminuted fracture refers to a bone broken in multiple places as opposed to a transverse fracture where the bone is broken in a single straight line break. A comminuted fracture is a serious type of fracture of the distal radius that usually requires surgery in order to fix the broken bone. This type of fracture can affect anyone and is usually a result of serious trauma. 

    Comminuted fractures are usually a result of serious or high-impact trauma. Comminuted fractures require a lot of force for the fracture to occur such as a car accident or a serious fall on an outstretched hand. Due to the severity of the fracture, surgery is usually the outcome which may require up to a year of recovery. 

    Distal radius fractures occur when a break is close to the wrist joint and radius, more commonly known as a broken wrist. The radius is located on the thumb side of your hand and is one of the two bones you find in your forearm.  

    A distal radius fracture can occur at different angles. The most common types are distal radius fractures known as Colles’ Fracture, Smith’s Fracture and Barton’s Fracture. 

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