34th Annual Scientific Meeting proceedings

Objectives:

Total hip replacement (THR) is currently the standard of care for disabling hip conditions in dogs. Several systems are available with good reported outcomes. Recently, a press fit THR system with a dual mobility cup and a triple wedge interlocking femoral stem, the IQAR Hip System® has been developed. The purpose of this study is to report the initial experience with this system.

Methods:

Consecutive THRs utilizing the IQAR hip System® with a minimum of six months follow-up were included. Signalment, indication, major and minor complications and final outcomes, were reported.

Results:

A total of 61 THR were performed in 58 dogs (55 unilateral and 6 staged bilateral surgery). Postoperative follow-up ranged from 6 months to 36 months.

Three intraoperative femoral fissures was reported, successfully treated by cerclage. Two dogs underwent prophylactic plating to prevent postoperative femoral fracture.

Postoperative minor complications were encountered in 8.1% of cases (5/61). Major complications were encountered in 14.75% of the cases (9/61) included three femoral fractures (two successfully revised, one explanted), three septic stem loosening (one successfully revised, one explanted, one euthanized), two aseptic cup loosening (one successfully revised, one revision declined by the owner) and one prothesis luxation (successfully revised).

Final outcomes were judged as poor in 6.5% of the cases (4/61) and judged excellent in 93.5% (57/61).

Conclusions:

This study showed that the IQAR® Hip System achieves similar outcomes and complications compared to other total hip systems and confirmed that dual mobility cups reduce postoperative hip luxation.