Cohort Studyhigh evidence
Collared, Uncemented Stems Markedly Reduce Periprosthetic Femoral Fracture Risk in Women ≥ 70 Years: A Swiss National Registry Study.
The Journal of arthroplasty·August 24, 2026·PMID 42637028
Why it mattersPeriprosthetic femoral fracture is a serious complication of uncemented THA in elderly women, a population increasingly receiving cementless implants. This large registry study identifies a simple, modifiable implant feature—the collar—that is strongly associated with reduced fracture risk, offering a practical way to improve safety without abandoning uncemented fixation.
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