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Superiorly and transversely orienting the bicortical suspension device provides optimal anterolateral stability to the proximal tibiofibular joint: a finite-element study

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Knee Surgery, Sports Traumatology, Arthroscopy Aims and scope

Abstract

Purpose

Instability of the proximal tibiofibular joint (PTFJ) can be treated with bicortical suspension (BCS) fixation. However, the ideal location, orientation, and configuration to apply one or two BCS devices are not clear.

Methods

A finite-element model of the PTFJ was created from a female adult’s CT dataset. Anterior and posterior ligaments at the PTFJ were modeled and suppressed to simulate stable and unstable joints. Fifty-six models simulated 56 device placements along guiding tunnel lines that connect eight entry locations on the fibular head to seven exit points on the anteromedial tibia. Doubling device stiffness created 56 more models. Combing any two placements created 1176 double-device configurations which were categorized to be crossed, divergent or parallel. Displacement of the fibular head relative to the fixed tibia under 100 N anterolateral and posteromedial forces was assessed.

Results

Different placements had 2.1–27.9 mm translation with 0.7–8.9° internal rotation under anterolateral loading, and 1.8–5.2 mm translation with 6.1–7.9° external rotation under posteromedial loading. More transverse and superior orientations were associated with smaller anterolateral translation; more posterior and superior entry locations were associated with smaller internal rotation. The median (IQR) reductions in anterolateral translation by doubling device stiffness and by adding a second device were 0.8 (IQR 0.5–1.0) and 0.8 (IQR 0–6.1) mm, respectively. The type of double-device configurations had no significant effect on fibular motion.

Conclusion

Surgeons should drill the guiding tunnel superiorly and transversely to ensure the optimal restoration of the PTFJ anterolateral stability.

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Data, materials, and/or code availability

The raw and result data for this study are huge (at least 1GB). So, it is not suitable for sharing publicly. But it can be accessible if requests are made to the authors.

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Acknowledgements

The authors thank Susan Odum, PhD for the statistical analysis and Marc Duemmler, MS as a pre-submission reviewer.

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No funding was received for conducting this work.

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Authors

Contributions

All authors contributed to the conception and design of this work. Model construction/simulation and data collection were performed by SW. All authors contributed to the analysis and interpretation of the collected data. The first draft of the manuscript was written by SW, and all authors commented on previous versions of the manuscript and approved the final manuscript.

Corresponding author

Correspondence to Shangcheng Wang.

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Conflict of interest

Authors Shangcheng Wang, Nahir Habet, Olivia M Rice, and Tyler L CarlLee declare they have no financial interests. Author Claude T. Moorman III is a speaker bureau for Lipogems, a paid consultant to DJ Orthopedics & OsteoCentric. He owns stock or stock options in the following companies/suppliers: OsteoCentric and PRIVIT. He has received research support from the following companies/suppliers: ZetrOZ, HeadTrainer, HistoGenetics, and Tornier. He has received fellowship support from the following companies/suppliers: Arthrex and Smith & Nephew. He has received royalties from Prager and World Scientific. He has served on medical/ortho publications editorial/governing boards for the following: Sage Pub and JSOA/Data Trace. He has society board member and committee appointments in the following organizations: American Orthopedic Society for Sports medicine, NC High School Athletic Association, and Piedmont Orthopedic Society.

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Wang, S., Habet, N., Rice, O.M. et al. Superiorly and transversely orienting the bicortical suspension device provides optimal anterolateral stability to the proximal tibiofibular joint: a finite-element study. Knee Surg Sports Traumatol Arthrosc 30, 3767–3775 (2022). https://doi.org/10.1007/s00167-022-06991-8

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  • DOI: https://doi.org/10.1007/s00167-022-06991-8

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