Comparison of two hydroxyapatite-coated femoral stems - Clinical, functional, and bone densitometry evaluation of patients randomized to a regular or modified hydroxyapatite-coated stem aimed at proximal fixation

JC Sluimer, NHM Hoefnagels, PJ Emans, R Kuijer*, RGT Geesink

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

Clinical function, bone mineral density (BMD), and radiographs of 80 randomly allocated, hydroxyapatite-coated femoral stems of two differing lengths were studied for 2 years. The short stein was optimized for proximal fixation. The predictive value of bone densitometry was also Studied. After 2 years, significantly more bone apposition and a higher BMD percentage were observed in Gruen zone 7 of the short stem. We Conclude that stern design can be enhanced to achieve more proximal fixation. However, We found a higher incidence of pain with the short stem, indicating a trade-off between increased proximal fixation and diminished overall mechanical stability. No strong correlations between clinical function and radiographic evaluation of remodeling were found with BMD, suggesting that dual-energy x-ray absorptiometry has no predictive value for short-term clinical outcome.

Original languageEnglish
Pages (from-to)344-352
Number of pages9
JournalJournal of Arthroplasty
Volume21
Issue number3
DOIs
Publication statusPublished - Apr-2006

Keywords

  • proximal fixation
  • hydroxyapatite
  • DEXA
  • pain
  • BMD
  • TOTAL HIP-ARTHROPLASTY
  • X-RAY ABSORPTIOMETRY
  • FOLLOW-UP
  • PROSTHESIS
  • COMPONENTS
  • QUALITY

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