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    • Meet Some Sirius Patients
    • Meet the Surgeons behind the Sirius Elbow
    • Find a Sirius Surgeon Near You
  • Information for Vets and Surgeons
    • Information for Vets and Surgeons
    • Clinical Benefits of the Sirius System
    • Register Interest in a Sirius Training Course
    • Meet the Surgeons behind the Sirius Elbow
    • Meet Some Sirius Patients
  • Meet Some Sirius Patients
  • Find a Sirius Surgeon Near You

Clinical Benefits of the Sirius Canine Elbow System

Factors influencing implant failure are multifactorial, and are commonly related to:
  • weakening of bone stock due to excessive bone resection and stress shielding
  • implant loosening due to poor fixation and differential movement between the radius and ulna at the implant surface
  • inadequate instrumentation
  • difficult surgical approach

The Sirius benefits from advances gained over the past 40 years in human joint replacement, and has been developed by a team of highly experienced medical engineers and veterinary surgeons. The Sirius incorporates the following design features, which help to avoid the common problems historically associated with implant failure:

  • bone conserving design requiring minimal bone resection: the Sirius simply resurfaces the ulnar surface, and preserves the majority of the distal humerus except for the mid-section of the trochlea. This design reduces the risk of bone resorption and weakening due to stress shielding.
  • preservation of pronation and supination: earlier systems have required the inhibition of radial motion (for example, by use of locking screws and / or distal ostectomy). The Sirius tray is fixed to the ulna only, allowing free movement of the radius.
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Sirius 3 canine elbow - post-op radiograph
Courtesy of Rob Pettitt, University of Liverpool
  • primary and secondary fixation: the humeral stem is cemented and the box-cut distal end provides additional rotational and translational stability. The ulnar component benefits from initial multiple point screw and peg fixation and has a state of the art trabecular metal coating to ensure excellent long-term osseointegration.
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  • fully instrumented system and non-handed implant design: the Sirius system is fully instrumented, and has been developed in association with leading veterinary orthopaedic surgeons, to ensure optimal ergonomics and a straightforward surgical approach.
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