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Is ulnar shortening osteotomy effective for the treatment of ulnar styloid impaction syndrome compared to ulnar impaction syndrome?

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Abstract

Purpose

This study aimed at evaluating the outcomes of ulnar shortening osteotomy (USO) for the treatment of ulnar styloid impaction syndrome (USIS) and to compare them with those of USO for the treatment of ulnar impaction syndrome (UIS).

Methods

We enrolled 144 patients who underwent USO between March 2015 and October 2021. The patients were divided into a UIS group (group I, n = 93) and a USIS group (group II, n = 51). Clinical and radiological parameters, including Disabilities of the Arm, Shoulder, and Hand (DASH) score, ulnar variance, ulnar styloid length, and ulnar styloid process index (USPI), were collected pre-operatively and one year post-operatively, and a comparative analysis was performed.

Results

The DASH score showed significant improvement in both groups (p < .001 and p < .001), and there was no significant difference between the two groups one year after surgery (p = .143). The USPI was significantly different between the two groups (p < .001). The ulno-lunate and ulno-triquetrum distances showed significant increases in both groups, with significant differences between the two groups (p = .020, and p < .001, respectively). The incidence of post-operative arthritic changes in the distal radioulnar joint was significantly greater in the UIS group than that in the USIS group (21 vs 3, respectively; p = .017). No remarkable differences were observed in the post-operative evidence of chondromalacia at the last follow-up between the two groups.

Conclusion

The USO, which was performed as a treatment for USIS showed reliable outcomes compared to the USO for the treatment of UIS. Therefore, USO is a viable option for the treatment of USIS.

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Data availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

Code availability

Not applicable.

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Funding

This research was supported by the Bio&Medical Technology Development Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (RS-2023–00220408).

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Dankook University Hospital, Cheonan, 31116, South Korea

    Kyung Wook Kim, Kwon Young Kwak, Hyung Jun Lee & Seong Wook Kim

  2. Department of Orthopaedic Surgery, College of Medicine, Kyungpook National University, Daegu, 41944, South Korea

    Bum-Jin Shim

  3. Department of Orthopaedic Surgery, Kyungpook National University Chilgok Hospital, Daegu, 41404, South Korea

    Bum-Jin Shim

Authors
  1. Kyung Wook Kim
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  2. Kwon Young Kwak
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  3. Hyung Jun Lee
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  4. Seong Wook Kim
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  5. Bum-Jin Shim
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Contributions

All authors contributed to the study conception and design. Literature search, material preparation and data collection were performed by Kyung Wook Kim, Hyung Jun Lee, Seong Wook Kim, and Bum-Jin Shim. The first draft of the manuscript was written by Kyung Wook Kim, Kwon Young Kwak, and Bum Jin Shim. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Bum-Jin Shim.

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Ethics approval

This study was performed in line with the principles of the Declaration of Helsinki. Ethical approval for this study was obtained from the Dankook University Hospital Institutional Review Board (DKUH-2023–04-012).

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The authors have no relevant financial or non-financial interests to disclose.

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Kim, K.W., Kwak, K.Y., Lee, H.J. et al. Is ulnar shortening osteotomy effective for the treatment of ulnar styloid impaction syndrome compared to ulnar impaction syndrome?. International Orthopaedics (SICOT) 47, 2787–2794 (2023). https://doi.org/10.1007/s00264-023-05928-1

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