Modular femoral head and liner exchange for the unstable total hip arthroplasty.
Outcomes of femoral head and nonconstrained liner exchange in treating hip instability were evaluated. Forty-eight modular component exchanges performed in 45 patients for recurrent hip dislocations were retrospectively reviewed. Mean follow-up was 4.7 years. Overall success rate was 73% (35/48 hips). Thirty-two (67%) of 48 hips experienced no further dislocations. Three patients had 1 dislocation each with no subsequent dislocations. Ten patients (13 hips) had additional surgery to stabilize their hips (27% failure rate). Demographic, clinical, and implant variables were not associated with outcome. Isolated modular component exchange can be successful in treating recurrent hip dislocations; however, a significant failure rate, not easily predicted, exists. This represents the largest series of modular head and nonconstrained liner exchange for hip dislocation (122/125).
Orange Orthopedic Medical Group, Orange, CA, USA.
Ayaz A
AA
Biviji
Kace A
KA
Ezzet
Pamela
P
Pulido
Clifford W
CW
Colwell
D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000453:epidemiology / Q000517:prevention & control; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012086:Reoperation / Q000295:instrumentation* / Q000379:methods*; D012189:Retrospective Studies; D012307:Risk Factors; D055502:Secondary Prevention; D017211:Treatment Failure; D016896:Treatment Outcome