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

Antonio Moroni; Cesare Faldini; Francesco Pegreffi; Sandro Giannini

doi:10.1002/jbm.10088

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

Antonio Moroni, Cesare Faldini, Francesco Pegreffi, Sandro Giannini

Istituti Ortopedici Rizzoli

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	61-64
Number of pages	4
Journal	Journal of Biomedical Materials Research
Volume	63
Issue number	1
DOIs	https://doi.org/10.1002/jbm.10088
Publication status	Published - 2002

Keywords

Bicylindrical pins
External fixation
Hydroxyapatite
Stainless steel
Tapered pins

ASJC Scopus subject areas

Biomedical Engineering
Biomaterials

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10.1002/jbm.10088

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

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",

keywords = "Bicylindrical pins, External fixation, Hydroxyapatite, Stainless steel, Tapered pins",

author = "Antonio Moroni and Cesare Faldini and Francesco Pegreffi and Sandro Giannini",

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AU - Giannini, Sandro

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