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Dislocation in low-friction arthroplasty.

E García-Cimbrelo¹, L Munuera

¹Department of Orthopaedics, Hospital La Paz, Madrid, Spain.

The Journal of Arthroplasty

|June 1, 1992

Summary

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Dislocation after low-friction arthroplasty occurs in 2.97% of cases, often due to component malposition or abductor deficiency. Prevention through careful surgical technique is crucial, as treating dislocations yields only 51% good results.

Area of Science:

Orthopedic Surgery
Biomedical Engineering

Background:

Low-friction arthroplasty is a common procedure for hip joint replacement.
Dislocation is a significant complication following arthroplasty, impacting patient outcomes.

Purpose of the Study:

To analyze the incidence and causes of dislocation after low-friction arthroplasty.
To evaluate the effectiveness of different treatment strategies for dislocated hips.

Main Methods:

Retrospective analysis of 2,050 low-friction arthroplasties.
Categorization of dislocation causes into component malposition, abductor mechanism deficiency, or combined factors.
Review of treatment outcomes for dislocated hips.

Main Results:

A total of 61 dislocations (2.97%) were analyzed.

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Component malposition (33%) and abductor deficiency (34%) were the primary causes of dislocation.

Combined factors accounted for 26% of cases, with an unknown cause in 7%.

Treatment success rates for dislocated hips averaged only 51% across various procedures.

Conclusions:

Component malposition and abductor mechanism deficiency are key factors contributing to dislocation after low-friction arthroplasty.
Preventive measures, emphasizing meticulous surgical technique, are paramount.
Current treatment options for hip dislocation following arthroplasty demonstrate limited success rates.