Low-friction arthroplasty with Boneloc bone-cement: outcome at 2 to 4 years

J P Walczak, J C D'Arcy, K R Ross, S E James, A V Bonnici, S R Koka, R W Morris

Research output: Contribution to journalArticle (Academic Journal)peer-review

15 Citations (Scopus)


We report the clinical and radiologic outcome of 109 Chamley low-friction arthroplasties implanted with Boneloc bone-cement (Biomet, Bridgend, South Wales, UK) into 104 patients. The mean follow-up was 30 months (range, 2-48 months). There were 72 women (mean age, 71 years) and 32 men (mean age, 72). Cartridge-packed cement was used in 37 cases and vacuum-packed cement in 72 cases. Survivorship analysis based on revision for aseptic loosening showed 79% survival at 4 years. Seventeen (15.5%) hips have been revised for aseptic loosening to date, in which all stems and 4 cups were loose. Extensive femoral osteolysis was always present and resulted in 4 cases of femoral cortical perforation at revision. Survivorship analysis based on revision and radiologic failure showed only 55% survival over the same period. When radiologic loosenings were included as failures, the vacuum-packed cement performed significantly worse than the cartridge-packed cement it replaced. These poor results were consistent with the withdrawal of Boneloc from clinical use in 1995, and we recommend indefinite follow-up for surviving prostheses.

Original languageEnglish
Pages (from-to)205-9
Number of pages5
JournalJournal of Arthroplasty
Issue number2
Publication statusPublished - Feb 2000


  • Aged
  • Arthroplasty, Replacement, Hip
  • Bone Cements
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Methacrylates
  • Proportional Hazards Models
  • Prosthesis Failure
  • Reoperation
  • Survival Rate
  • Time Factors
  • Treatment Outcome


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