A comparative study of wire fixation and screw fixation in arthrodesis for the correction of hallux rigidus using an in vitro biomechanical model.
BACKGROUND
Arthrodesis of the great toe metatarsophalangeal joint for osteoarthritis usually involves internal fixation. Ideally, the fixation method should be reproducible, leading to a high rate of fusion and minimal complications.


METHODS
This biomechanical study compares circumferential wire and screw fixation methods of arthrodesis.


RESULTS
The two arthrodesis models have remarkably similar limits of elastic and plastic deformation. However, in the screw, failure by permanent deformation occurs at a load six times higher than the wire.


CONCLUSIONS
The use of circumferential wire fixation for osteoporotic bones in which screw purchase is poor is reasonable and for quality bone, screw fixation may be preferable.
Faraj
Adnan A
AA
Airedale General Hospital, Department of Orthopaedics, Skipton Road, Keighley, West Yorkshire BD20 6TD, and Medical Engineering Department, Biomechanical Laboratory, University of Bradford, United Kingdom. shevanfaraj@hotmail.com
Naraen
Asheem
A
Twigg
Peter
P
D001174:Arthrodesis / Q000295:instrumentation* / Q000379:methods; D001696:Biomechanical Phenomena; D001863:Bone Screws; D001864:Bone Wires; D020859:Hallux Rigidus / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D008954:Models, Biological