BOFAS Abstracts Archive

You can search for abstracts by using the search bar below.
Alternatively you can browse through podium and poster presentations by selecting the year and / or type below. You can further refine your search using tags or use the search bar.

Search

RSS Abstracts 476 Expand/Collapse
- RSS 2013 64 Expand/Collapse
  - RSS Poster 24 Expand/Collapse
  - RSS Podium 40 Expand/Collapse
- RSS 2014 36 Expand/Collapse
  - RSS Podium 36 Expand/Collapse
- RSS 2015 49 Expand/Collapse
  - RSS Poster 20 Expand/Collapse
  - RSS Podium 29 Expand/Collapse
- RSS 2016 45 Expand/Collapse
  - RSS Poster 18 Expand/Collapse
  - RSS Podium 27 Expand/Collapse
- RSS 2017 40 Expand/Collapse
  - RSS Poster 15 Expand/Collapse
  - RSS Podium 25 Expand/Collapse
- RSS 2018 47 Expand/Collapse
  - RSS Poster 22 Expand/Collapse
  - RSS Podium 25 Expand/Collapse
- RSS 2019 48 Expand/Collapse
  - RSS Poster 25 Expand/Collapse
  - RSS Podium 23 Expand/Collapse
- RSS 2021 15 Expand/Collapse
  - RSS Poster 10 Expand/Collapse
  - RSS Podium 6 Expand/Collapse
- RSS 2022 46 Expand/Collapse
  - RSS Poster 23 Expand/Collapse
  - RSS Podium 23 Expand/Collapse
- RSS 2023 46 Expand/Collapse
  - RSS Poster 23 Expand/Collapse
  - RSS Podium 23 Expand/Collapse
- RSS 2024 40 Expand/Collapse
  - RSS Poster 18 Expand/Collapse
  - RSS Podium 22 Expand/Collapse

Categories: Abstracts, 2013, Podium

Does intra-osseous fixation with the IO FiX improve force and contact area in foot and ankle fusions?

L. Parker, P. Ray, S. Grechenig, W. Grechenig

¹The Royal National Orthopaedic Hospital, Middlesex, United Kingdom

²Barnet Hospital, London, United Kingdom

³Medical University of Graz, Department of Traumatology, Graz, Austria

Introduction: When inserting a lag-screw across an arthrodesis, stress is concentrated under the screw head risking asymmetrical force distribution and fracture of the cortical bone bridge. The IO FiX (Extremity Medical, NJ USA) is a new intraosseous device comprising an X-Post on one side of and parallel to the arthrodesis and a lag-screw inserted through the head of the X-Post which reinforces the cortical bone bridge. The X-Post behaves as an internal washer improving force distribution across the arthrodesis. Being intraosseous, near to the neutral axis of bend also means the device is fatigue-resistant and soft tissue irritation is reduced.

Methods: The IO FiX has not been independently verified and therefore we analysed its performance in a human cadaveric ankle model. Our null hypothesis was there is no difference in force generation and contact area in an ankle arthrodesis when the IO FiX is compared with partially-threaded lag-screws. We used ten randomized cadaver ankles with a mean age of seventy-one years (44-84 years) prepared with flat arthrodesis cuts. A Tek-scan (Boston, USA) pressure transducer was used to measure force and contact area produced when the IO FiX was compared with a standard lag-screw and washer.

Results: The median average force in the IO FiX group was 3.95 kg and 2.35 kg in the lag-screw group (p=< 0.01 Wilcoxon signed-rank). The IO FiX was able to create a more uniform contact area within the arthrodesis with a median average of 3.41 cm² compared with 2.42 cm2 in the lag-screw group (p=< 0.03 Wilcoxon signed rank).

Conclusion: Our results suggest the IO FiX improves force generation and contact area across the arthrodesis. With the theoretical advantages of reduced soft tissue irritation and a lower risk of fatigue failure, the IO FiX offers a significant advantage compared with traditional fixation techniques.

Print

Tags: Ankle Arthrodesis

Click thumbnail below to view poster / thumbnail:

Archive of Abstracts