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Relationship between morphology of transverse bundle of ulnar collateral ligament and adjacent tissues

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Abstract

Purpose

The purpose of this study was to clarify the incidence of the transverse bundle (TB) of the ulnar collateral ligament (UCL), the relationships between TB morphology and morphology of the anterior bundle (AB) or posterior bundle (PB) of the UCL, and the relationship between the TB and the posterior common tendon (PCT).

Methods

This study examined 38 elbows from 23 cadavers. TB, AB, and PB were classified morphologically. The TB was classified as: type I, TB does not continue the entire length of the AB; or type II, TB continues the entire length of the AB. The AB and PB were classified as: type I, could be separated as single bundles; or type II, could not be separated. We also observed specimens by focusing on the continuity between the TB and PCT. Fisher’s exact test was used to examine the relationship between TB type and AB or PB type.

Results

A TB was identified in all 38 elbows (100%), and continued to the AB in all specimens. No significant relationship was evident between TB type and AB or PB type. Continuity of TB fibers and the PCT was seen in 26 elbows (72%).

Conclusion

This study suggested that the morphology of the transverse bundle may be unrelated to the morphology of the anterior bundle or posterior bundle.

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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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Acknowledgments

The authors would like to acknowledge and thank those anonymous individuals who generously donated their bodies and so enabled this study to be performed.

Funding

This study was supported by a Grant-in-Aid for Scientific Research (19K11358) from the Japan Society for the Promotion of Science (JSPS) and a Grant-in-Aid program from Niigata University of Health and Welfare (H30B05).

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Authors and Affiliations

  1. Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, Niigata, 950-3198, Japan

    Kanta Matsuzawa, Mutsuaki Edama, Tomofumi Otsuki & Sae Maruyama

  2. Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan

    Mutsuaki Edama & Ikuo Kageyama

  3. Department of Rehabilitation, AR-Ex Oyamadai Orthopedic Clinic Tokyo Arthroscopy Center, Tokyo, Japan

    Masahiro Ikezu

Authors
  1. Kanta Matsuzawa
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  2. Mutsuaki Edama
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  3. Tomofumi Otsuki
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  4. Sae Maruyama
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  5. Masahiro Ikezu
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  6. Ikuo Kageyama
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Contributions

KM and ME contributed to study design and data collection, and drafted the manuscript; TO contributed to data analysis and made critical revisions to the manuscript; SM and MI made critical revisions to the manuscript; IK supervised the study, contributed to analysis and interpretation of data, and made critical revisions to the manuscript. All authors read and approved the final manuscript prior to submission.

Corresponding author

Correspondence to Kanta Matsuzawa.

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Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical approval

This study was performed in accordance with the declaration of Helsinki after obtaining approval from the ethics committee at our institution (18430).

Informed consent

Informed consent was obtained from the families of all subjects.

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Matsuzawa, K., Edama, M., Otsuki, T. et al. Relationship between morphology of transverse bundle of ulnar collateral ligament and adjacent tissues. Surg Radiol Anat 43, 1603–1607 (2021). https://doi.org/10.1007/s00276-021-02753-2

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  • DOI: https://doi.org/10.1007/s00276-021-02753-2

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