Acetabular Loosening Using an Extended Offset Polyethylene Liner

• Published in: Clinical orthopaedics and related research Vol. 467; no. 1; pp. 188 - 193
• Main Authors: Archibeck, Michael J., Cummins, Tamara, Junick, Daniel W., White, Richard E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York Springer-Verlag 01.01.2009; Springer; Lippincott Williams & Wilkins Ovid Technologies
• Subjects: Acetabulum - surgery; Adolescent; Adult; Aged; Aged, 80 and over; Arthroplasty, Replacement, Hip - adverse effects; Arthroplasty, Replacement, Hip - instrumentation; Arthroplasty, Replacement, Hip - statistics & numerical data; Biological and medical sciences; Bone Screws; Conservative Orthopedics; Diseases of the osteoarticular system; Female; Follow-Up Studies; Hip Prosthesis; Humans; Kaplan-Meier Estimate; Male; Medical sciences; Medicine; Medicine & Public Health; Middle Aged; Orthopedics; Polyethylene; Postoperative Complications - diagnostic imaging; Postoperative Complications - epidemiology; Postoperative Complications - surgery; Prosthesis Failure; Radiography; Reoperation; Retrospective Studies; Sports Medicine; Surgery; Surgical Orthopedics; Symposium: Papers Presented at the Hip Society Meetings 2008; Young Adult; Aseptic Loosening; Abduction Angle; Standard Liner; Acetabular Component; Polyethylene Liner; Acetabulum; Polyethylene; Loosening; Orthopedics
• ISSN: 0009-921X; 1528-1132
• DOI: 10.1007/s11999-008-0479-x

The use of extended offset femoral components and acetabular liners helps restore preoperative offset during hip arthroplasty. We report a relatively high acetabular component aseptic loosening rate with the use of offset polyethylene liners. We reviewed 1919 primary and 346 revision total hip arthroplasties (THAs). A 7-mm offset acetabular liner was used in 120 of the primary and 100 of the revision THAs. The aseptic loosening rate in the primary THA group was 0.12% in the standard offset and 4.2% in the extended offset groups at a minimum of 2 years (mean, 3.6 years; range, 2–9 years) followup. The aseptic loosening rate in the revision group was 1.7% in the standard and 7% in the extended offset groups at a mean of 4 years (range, 2–9 years) followup. Although extended offset acetabular liners help restore hip offset, torsional force applied to the implant-bone interface may have a detrimental effect on fixation. We found a relatively high failure rate in our primary and revision acetabular components used with an offset liner. Level of Evidence: Level III, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.