[Treatments of dislocation after total hip replacement].

OBJECTIVE

To explore the treatment of dislocation after total hip replacement.

METHODS

From July 1997 to October 2004, 23 cases of dislocation after total hip replacement were treated, including 9 males and 14 females and aging 53-79 years. The CT and serial X-ray films were taken to observe the position of prostheses. The strength of their hip abductor was also tested. In the patients without loosening, closed reduction was attempted at first. The stability of hip was tested. If closed reduction failed, the offset or/and parts of the components was adjusted, then the capsular was repaired. If instability still existed, revision was adopted.

RESULTS

In 23 cases of dislocation, 10 cases were treated successfully by closed reduction. In 12 patients who failed reduction, 5 were given open reduction combined with capsular repairing; the offset was adjusted by lengthening femoral head in 2 cases; rim liners were elevated in 2 cases; and larger offset was used and abnormal liner was adjusted in 1 case. Revision was used in 1 case having loosening and 2 cases having instability. All patients were followed up 1 year to 5 years (1.9 years on average). The Harris scoring was 72-94 (87 on average).

CONCLUSION

The treatment of dislocation after total hip replacement should use different ways according to the causes of dislocation and the stability of hip.