Abstract
Purpose
This study aimed to investigate the optimal tension for the reconstruction of the distal radioulnar ligaments (DRULs) in the treatment of the distal radioulnar joint (DRUJ) instability.
Methods
A total of eight human cadaver upper extremities were used. First, the Tekscan sensor film system was used to measure the contact characteristics of the intact DRUJ. Following this, the DRULs were resected, and the measurement was repeated. The DRULs were then reconstructed according to Adams’ procedure, and the contact forces under different initial tension were compared with that of the intact group to obtain the optimal tension. At that point, the contact force of the DRUJ was close to normal. The reliability of the obtained tension was verified by translational testing, which reflected the stability of the DRUJ.
Results
In the neutral position, the contact force, area, and pressure inside DRUJ were 0.51 ± 0.10 N, 64.08 ± 11.58 mm2, and 8.33 ± 2.42 kPa, respectively. After the DRULs were resected, they were 0.19 ± 0.02 N, 41.75 ± 5.01 mm2, and 4.86 ± 1.06 kPa, respectively. The relationship between the tension and contact force was linear regression (Y = 0.0496x + 0.229, R2 = 0.9575, P < 0.0001). According to the equation, when the tension was 3.64–7.68 N, the contact force was close to normal. There was no statistical difference in the stability of the reconstructed DRUJ under this tension compared with the intact group (P = 0.08).
Conclusion
By comparing the contact forces under different reconstruction tensions with the normal value, we obtained the optimal tension, which can provide the theoretical basis for the clinical treatment of chronic DRUJ instability.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We thank Tong Zhou from Shanghai Blackflame Medical Technology Co., Ltd., for his assistance.
Funding
This study was supported by Wuxi “Taihu Talent Plan” high-level medical and health talents.
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All authors (FMG, JQL, LTL, XDF, FX, XYP, GZ, and JYM) contributed to the study conception and design. Material preparation, data collection, and analysis were performed by FMG, JQL, LTL, XDF, FX, XYP, and GZ. The first draft of the manuscript was written by FMG and critically revised by JYM. All authors read and approved the final manuscript.
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Gu, F., Liu, J., Liao, L. et al. The optimal tension for the reconstruction of the distal radioulnar ligaments. International Orthopaedics (SICOT) 46, 2283–2289 (2022). https://doi.org/10.1007/s00264-022-05525-8
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DOI: https://doi.org/10.1007/s00264-022-05525-8