A double-blind RCT comparing highly crosslinked polyethylene (HXLPE) with conventional UHMWPE acetabular liners in total hip arthroplasty. All patients received the same cemented stem and uncemented cup, differing only in liner type. Wear was measured over 10 years using radiostereometric analysis, which detects penetration under 0.1 mm.
Aseptic loosening drives over half of all hip revisions, and polyethylene wear debris is the main trigger for the osteolysis that loosens the implant. This trial answers a practical question: does the lower wear seen in hip simulators actually hold up in patients over 10 years? The answer is yes. HXLPE steady-state wear was essentially zero and roughly 10-fold lower than conventional polyethylene.
Use this to explain why crosslinked liners became the default bearing for THA. The mechanism is fewer particles, less osteolysis, and a plausible path to longer implant survival.
Two cautions keep you honest. First, the reduced wear did not translate into any difference in Oxford Hip Scores or revision at 10 years, because loosening and pain are late events. Second, remember that first-year penetration is mostly creep, not wear, so early radiographic penetration is expected and not a sign of failure.
A double-blind RCT comparing highly crosslinked polyethylene (HXLPE) with conventional UHMWPE acetabular liners in total hip arthroplasty. All patients received the same cemented stem and uncemented cup, differing only in liner type. Wear was measured over 10 years using radiostereometric analysis, which detects penetration under 0.1 mm.
Aseptic loosening drives over half of all hip revisions, and polyethylene wear debris is the main trigger for the osteolysis that loosens the implant. This trial answers a practical question: does the lower wear seen in hip simulators actually hold up in patients over 10 years? The answer is yes. HXLPE steady-state wear was essentially zero and roughly 10-fold lower than conventional polyethylene.
Use this to explain why crosslinked liners became the default bearing for THA. The mechanism is fewer particles, less osteolysis, and a plausible path to longer implant survival.
Two cautions keep you honest. First, the reduced wear did not translate into any difference in Oxford Hip Scores or revision at 10 years, because loosening and pain are late events. Second, remember that first-year penetration is mostly creep, not wear, so early radiographic penetration is expected and not a sign of failure.