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Equivalent values between anterior vertebral height, wedge ratio, and wedge angle in osteoporotic vertebral fractures

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Journal of Bone and Mineral Metabolism Aims and scope Submit manuscript

A Correction to this article was published on 30 September 2021

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Abstract

Introduction

Vertebral mobility (V-mobility) has been used to diagnose fresh osteoporotic vertebral fractures (OVFs), and determine or predict bone union by setting cutoff values for these purposes. V-mobility is defined as the difference in shape of vertebral bodies between lateral radiographs taken in weight-bearing and non-weight-bearing positions. The parameters for V-mobility have varied in previous reports among anterior vertebral height (Ha, mm), wedge ratio (WR, %), and wedge angle (WA, degrees). The present study aimed to clarify WR and WA equivalent to Ha of 1.0 mm, and to compare the reported cutoff values for V-mobility presented as Ha, WR, or WA.

Materials and methods

Lateral radiographs of 446 normal vertebrae (grade 0) and 146 deformed vertebrae (grade 1–3) from T11 to L2 were obtained from 183 female patients aged > 60 years. WR (%) values equivalent to Ha of 1.0 mm were calculated by Ha (1.0 mm)/Hp × 100 (Hp: posterior vertebral height). Corresponding WA values were calculated by trigonometric function using vertebral dimensions.

Results

The mean WR values equivalent to Ha of 1.0 mm in the vertebrae from T11 to L2 were 3.2%, 3.2%, 3.5%, and 3.7% for grades 0, 1, 2, and 3, respectively, and the corresponding WA values were 1.6°, 1.6°, 1.5°, and 1.4°.

Conclusion

The equivalent values for V-mobility presented as Ha, WR, and WA were obtained. The mean WR and WA values equivalent to Ha of 1.0 mm in grade 1–3 vertebrae were 3.5% and 1.5°, respectively.

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Acknowledgements

The authors thank Mr. J Kato and his co-workers for taking radiographs of high quality for measurements, and Alison Sherwin, PhD, from Edanz Group (https://en-author-services.edanzgroup.com/ac) for editing a draft of this manuscript.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Matsuda Hospital, 17-1 Sanezawa aza Tatsutayashiki, Izumi-ku, Sendai, Miyagi, 981-3217, Japan

    Kozo Sato, Masakazu Kogawa, Yuichiro Yamada, Masahiro Yamashiro, Fumio Kasama & Michimasa Matsuda

  2. Centre for Orthopaedic and Trauma Research, Discipline of Orthopaedics and Trauma, The University of Adelaide, North Terrace and George St., Adelaide, SA, 5005, Australia

    Masakazu Kogawa

Authors
  1. Kozo Sato
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  2. Masakazu Kogawa
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  3. Yuichiro Yamada
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  4. Masahiro Yamashiro
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  5. Fumio Kasama
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  6. Michimasa Matsuda
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Contributions

All authors were involved in the planning of the study and obtaining written informed consent. Kozo Sato contributed to the study conception and design, performed measurements, analyzed data, and wrote the manuscript. Masakazu Kogawa participated in designing the study, analyzing data, and preparing the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Masakazu Kogawa.

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Conflict of interest

All authors have no conflicts of interest.

Ethical approval

This study was approved by the Committee of Medical Ethics of Matsuda Hospital (05 October 2020; Approval Number, 2–4). Written informed consent was obtained from all patients.

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The original online version of this article was revised due to the last author name was incorrectly tagged as corresponding author and the name is correctly updated in this version.

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Sato, K., Kogawa, M., Yamada, Y. et al. Equivalent values between anterior vertebral height, wedge ratio, and wedge angle in osteoporotic vertebral fractures. J Bone Miner Metab 40, 132–140 (2022). https://doi.org/10.1007/s00774-021-01264-9

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  • DOI: https://doi.org/10.1007/s00774-021-01264-9

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