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Incidence of ceramic liner malseating in Trident acetabular shell
Anna N Miller1, Edwin P Su, Mathias P G Bostrom
1Department of Orthopedic Surgery, Hospital for Special Surgery, 535 E. 70th Street, New York, NY 10021, USA.
Clinical Orthopaedics and Related Research
|March 13, 2009
Summary
In total hip replacements (THRs) using ceramic bearings, 7.2% of patients showed incomplete liner seating. Surgeons should verify ceramic liner placement during surgery and follow-up to ensure patient safety.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Medical device engineering
Background:
- Ceramic bearings in total hip replacements (THRs) offer low wear rates, making them suitable for younger patients.
- Previous reports have indicated instances of incomplete ceramic liner seating within the metallic shell.
Purpose of the Study:
- To investigate the incidence of incomplete ceramic liner seating in ceramic-ceramic bearings during THRs.
- To evaluate the clinical implications and recommend management strategies for this complication.
Main Methods:
- A cohort study was conducted on consecutive patients undergoing THRs with ceramic-ceramic bearings.
- Radiographic analysis was employed to assess the seating of the ceramic liner in the metallic shell.
- Patient follow-up was performed at 6 to 12 weeks post-surgery.
Main Results:
- Radiographic evidence of incomplete liner seating was found in 50 out of 694 hips (7.2%).
- No adverse effects were observed in the affected patients at the 6 to 12-week follow-up period.
Conclusions:
- Incomplete seating of ceramic liners in metallic shells is an identifiable complication in THRs.
- Surgeons should meticulously check liner placement during surgery and at follow-up appointments.
- Proactive assessment and monitoring are crucial for managing this potential issue and ensuring optimal patient outcomes.
