title: Significantly reduced leg length discrepancy and increased femoral offset by application of a head-neck adapter in revision total hip arthroplasty.
abstract: Head-neck adapters in total hip arthroplasty (THA) promise the reconstruction of optimal femoral offset and leg length in revision THA while retaining stable implants. Radiological parameters after adapter implantation in THA revision were determined in 37 cases. Significant reduction of leg length discrepancy and improvement of femoral offset (P < 0.001) were found. Clinical endpoints were determined in 20 cases (mean follow-up 4.0 years). Clinical scores were rather poor (median Harris hip score 54, WOMAC score 41) due to age and comorbidities, postoperative dislocation occurred in 3 cases. Only one stable femoral stem had to be revised due to recurrent postoperative dislocation. In conclusion, a head-neck adapter can be a valuable tool in certain cases of revision THA with acceptable dislocation rates while allowing the retention of stable implants.
authors.affiliation: Department of Orthopaedic Surgery, Ulm University, Ulm, Germany.
authors.forename: Julia V
authors.initials: JV
authors.lastname: Woelfle
authors.affiliation: Department of Orthopaedic Surgery, Ulm University, Ulm, Germany.
authors.forename: Christian R
authors.initials: CR
authors.lastname: Fraitzl
authors.affiliation: Department of Orthopaedic Surgery, Ulm University, Ulm, Germany.
authors.forename: Heiko
authors.initials: H
authors.lastname: Reichel
authors.affiliation: Department of Orthopaedic Surgery, Ulm University, Ulm, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Wernerus
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007870:Leg Length Inequality / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000295:instrumentation
keywords: dislocation rate; femoral offset; head–neck adapter; leg length discrepancy; revision THA