Fixation strength of tapered versus bicylindrical hydroxyapatite-coated external fixation pins: An animal study

Antonio Moroni, Cesare Faldini, Francesco Pegreffi, Sandro Giannini

Research output: Contribution to journalArticlepeer-review

Abstract

The purpose of this study was to comparatively measure the bone-pin interface strength in two types of hydroxyapatite-coated pins that differed in shape, diameter, and implantation technique. Both pin types are commonly used for tibia fixation. Thirty bicylindrical 5/4-mm stainless-steel pins (Group A) and 30 tapered 6/5-mm stainless-steel pins (Group B) were implanted in the left tibiae of 10 adult sheep. A monolateral fixator was mounted on the pins after implantation. A 5-mm-long bone segment was removed from the tibial mid-diaphysis to ensure high load at the bone-pin interface. Pin insertion torque was 830 ± 446 N/mm in Group A and 3415 ± 743 N/mm in Group B (p

Original languageEnglish
Pages (from-to)61-64
Number of pages4
JournalJournal of Biomedical Materials Research
Volume63
Issue number1
DOIs
Publication statusPublished - 2002

Keywords

  • Bicylindrical pins
  • External fixation
  • Hydroxyapatite
  • Stainless steel
  • Tapered pins

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

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