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MINERVA ORTOPEDICA E TRAUMATOLOGICA
A Journal on Orthopedics and Traumatology
Minerva Ortopedica e Traumatologica 2007 February;58(1):33-6
Early dislocation after total hip arthroplasty: a comparison of the dislocation rate after posterior and lateral approaches to the hip
Iversen B. F. 1, Levi N. 2
1 Department of Orthopaedic Surgery Aker University Hospital, Oslo, Norway
2 Department of Orthopaedic Surgery Sunderby Hospital, Lulea, Sweden
Aim. The average incidence of dislocation after total hip arthroplasty is approximately 3%. However, the choice of surgical approach can affect the rate of postoperative dislocation although no clear consensus has been established on the the best approach. The aim of this study was, therefore, to assess the effect of the lateral and posterior surgical approach on the dislocation rate after total hip arthroplasty.
Methods. During a 7-year period a total of 340 total hip arthroplasty operations were performed. Midway through the reviewed series, the surgical approach was changed from a posterior approach according to Moore to a transgluteal lateral approach according to Hardinge. There were 255 women and 85 men. The average age of women was 73 years and the average age of men was 70 years.
Results. A total of 25 total hip arthroplasties (11 in men and 14 in women) dislocated. The 3-month dislocation rate was 11/85= 13% for men and 14/255= 5.5% for women. The overall 3-month dislocation rate was, therefore, 25/340= 7.4%. There was no significant difference between the posterior and lateral ap-proach.
Conclusion. The dislocation rate in this series is somewhat higher to than in recent reports, but it was independent of the choice of surgical approach.