An investigation of the bending stiffness of and the plane stresses generated by a flanged external fixator pin.

Abstract:

:In an attempt to reduce pin loosening, a flanged external fixator pin has been designed and its bending stiffness has been compared with that of a standard pin. The pins were inserted into pilot holes previously drilled into a piece of teak hardwood. Loads of different magnitudes were applied at a fixed moment arm and force-deflection curves were obtained. Thereafter, percentage stiffness increase was calculated for each pilot hole size. The results show that the addition of a collar to the external fixator pin increases its stiffness and its ability to resist bending forces. In a parallel study, the stresses generated at the pin-bone interface by this pin and a standard pin were compared using finite element analysis techniques. The results show that the flange significantly reduced the stresses generated at the pin-bone interface. In addition, stresses were dissipated over a wider area.

journal_name

J Orthop Trauma

authors

Oni OO,Capper M,Soutis C

doi

10.1097/00005131-199502000-00013

subject

Has Abstract

pub_date

1995-02-01 00:00:00

pages

83-8

issue

1

eissn

0890-5339

issn

1531-2291

journal_volume

9

pub_type

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