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Relationship between spinal sagittal alignment and acetabular coverage: a patient-matched control study

  • Orthopaedic Surgery
  • Published:
Archives of Orthopaedic and Trauma Surgery Aims and scope Submit manuscript

Abstract

Introduction

The significance of the relationship between the spine and hip joints has been frequently discussed. However, the relationship between acetabular coverage and spinal sagittal alignment has not been fully elucidated as previous studies did not adequately control for factors that might affect the spinopelvic alignment. The aim of this study was to elucidate the impact of acetabular coverage on spinal sagittal alignment by comparing patient groups matched on sex, age, and the presence of hip and anterior impingement pain.

Materials and methods

We prospectively enrolled 30 women undergoing periacetabular osteotomy (PAO) for developmental dysplasia of the hip (DDH) and 30 women undergoing hip arthroscopic surgery (HAS) for labral tears. The lateral centre edge angle was measured on hip radiographs. In addition, the sagittal vertical axis, pelvic tilt, pelvic incidence, sacral slope (SS), and lumbar lordosis (LL) were measured on preoperative plain radiographs of the whole spine to assess the sagittal spinal alignment. Clinical and radiologic data were compared between the two groups (PAO vs. HAS).

Results

The patient groups did not differ in age and body mass index. The mean SS was significantly greater in the PAO group (41.6° ± 1.6°) than in the HAS group (35.3° ± 1.5°; P = 0.0039). Additionally, the mean LL was significantly greater in the PAO group (54.5° ± 2.0°) than in the HAS group (45.1° ± 1.9°; P = 0.0015).

Conclusions

The SS and LL were greater in patients with DDH than in patients with hip pain, but without DDH. Patients with DDH might show lumbar hyperlordosis to rotate the pelvis anteriorly, increasing the anterosuperior acetabular coverage.

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Acknowledgements

We are grateful to Mitsutoshi Moriya, M.D., Yuya Ohtake, M.D., and Shintaro Shoji, M.D. for their helpful support during this study.

Funding

There is no funding source.

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Authors and Affiliations

  1. Department of Orthopaedic Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan

    Kensuke Fukushima, Masayuki Miyagi, Gen Inoue, Eiki Shirasawa, Katsufumi Uchiyama & Masashi Takaso

  2. Department of Rehabilitation, Kitasato University School of Allied Health Sciences, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan

    Naonobu Takahira

Authors
  1. Kensuke Fukushima
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  2. Masayuki Miyagi
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  3. Gen Inoue
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  4. Eiki Shirasawa
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  5. Katsufumi Uchiyama
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  6. Naonobu Takahira
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  7. Masashi Takaso
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Corresponding author

Correspondence to Kensuke Fukushima.

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The authors declare that they have no conflict of interest.

Ethical approval

Ethical approval was obtained from our Institutional Review Board (IRB). The study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.

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Informed consent was obtained from all participants enrolled in this study.

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Fukushima, K., Miyagi, M., Inoue, G. et al. Relationship between spinal sagittal alignment and acetabular coverage: a patient-matched control study. Arch Orthop Trauma Surg 138, 1495–1499 (2018). https://doi.org/10.1007/s00402-018-2992-z

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  • DOI: https://doi.org/10.1007/s00402-018-2992-z

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