Zurich Cementless Dual Mobility Cup for Canine Total Hip Prosthesis: Implant Characteristics and Surgical Outcome in 105 Cases

Abstract

Dislocation after total hip arthroplasty (THA) remains a troublesome complication, and a source of frustration for the owner and the surgeon. The dislocation rate of hip prostheses in dogs is reported to range from 4 to 15%, representing the most common short-term complication. This is especially true in large and giant breed dogs, usually requiring revision surgery. With the increase in the number of THA being performed in veterinary surgery, reducing or preventing complications such as postoperative THA dislocation will be of paramount importance. The Zurich cementless dual mobility (DM) system allows impingement-free range of angulation of 80 to 132 degrees between the ceramic head and the polyether ether ketone (PEEK) cup when combined with the range of the PEEK cup in the outer metal cup. In this article, we review the use of the DM cup in THA in large and giant breed dogs, in terms of its history, biomechanics, outcomes and complications based on 105 cases.

Die Zukunft der Prothetik in der Kleintierchirurgie

“…Diese doppelte Mobilität verringert die Reluxationsrate, es fehlen jedoch auch in der Humanmedizin noch prospektive Langzeitstudien, die den Erfolg bestätigen 5 . In der Tiermedizin steht der Einsatz noch am Anfang, aber die ersten klinischen Einsätze sind vielversprechend 6 .…”

Dual Mobility Cup for Revision of Dislocation of a Hip Prosthesis in a Dog with Chronic Hip Dislocation

“…Revision surgery using DM cup system was performed according to previous surgical description (12). Briefly, preparation of the acetabulum was performed with a series of 26-, 28-, and 29-mm spherical cup reamers.…”

“…The dual mobility (DM) cup system was recently developed to reduce the dislocation of the hip prosthesis, and both successful cases of cemented and cementless DM cups have been reported in veterinary medicine (8,12). The cementless DM cup consists of three components: a smaller head, larger polyether ether ketone (PEEK) hemisphere, and outer acetabular shell (12).…”

“…The dual mobility (DM) cup system was recently developed to reduce the dislocation of the hip prosthesis, and both successful cases of cemented and cementless DM cups have been reported in veterinary medicine (8,12). The cementless DM cup consists of three components: a smaller head, larger polyether ether ketone (PEEK) hemisphere, and outer acetabular shell (12). In this system, the increase in the range of motion through two articulations between the three components and the increased jump distance according to the large head diameter effectively prevented postoperative hip dislocation.…”

“…To date, retrospective studies of clinical outcomes following the DM cup system as a primary THR have been reported in veterinary medicine (8,9,12,18). However, a clinical description of DM cup application in cases of chronic dislocation after primary THR has not been reported.…”