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Does the IOFIX improve compression in ankle fusion? |
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| Institution: | 1. SpR Trauma and Orthopaedic Surgery, The Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, Middlesex HA74LP, United Kingdom;2. Barnet Hospital, Wellhouse Lane, Barnet, Hertfordshire EN5 3DJ, United Kingdom;3. University Hospital Regensburg, Department of Traumatology, Franz-Josef-Strauss Allee, Regensburg, Germany;4. AUVA Trauma Hospital, Graz, Gostingerstrasse 24, 8020 Graz, Austria;1. CTS Piede e Caviglia, IRCCS Galeazzi, Via Riccardo Galeazzi, 4, 20161 Milano, Italy;2. University Hospital Aintree, Liverpool L9 7AL, United Kingdom;3. Università degli Studi di Milano, Via Festa del Perdono, 9, 20161 Milano, Italy;4. Department of Musculoskeletal Biology, University of Liverpool, Liverpool L3 5TQ, United Kingdom |
| Abstract: | BackgroundThe new IOFIX is an intra-osseous fixation device comprising an “X-post” through which a lag screw passes to apparently improve force distribution across an arthrodesis.We conducted a novel human cadaveric study. Our null hypothesis was no difference in force exists in an ankle arthrodesis model stabilized with the IOFIX or a conventional single lag screw.MethodIn ten cadaver ankles a pressure transducer was compressed as an IOFIX and standard single lag screws were alternately compared.ResultsThe median average force created by the IOFIX was 3.95 kg and 2.4 kg for the single conventional lag screw (p ⩽ 0.01). The IOFIX improved contact area across the arthrodesis with a median average of 3.41 cm2 compared with 2.42 cm2 in the lag screw group (p ⩽ 0.03).ConclusionOur results suggest an IOFIX improves force distribution across an ankle arthrodesis compared with a single conventional lag screw. |
| Keywords: | IOFIX X-post Lag screw Compression Arthrodesis Fusion |
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