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Evaluation of the three-dimensional bony coverage before and after rotational acetabular osteotomy

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Abstract

Purpose

Rotational acetabular osteotomy is a type of pelvic osteotomy that involves rotation of the acetabular bone to improve the bony coverage of the femoral head for patients with acetabular dysplasia. Favourable post-operative long-term outcomes have been reported in previous studies. However, there is a paucity of published data regarding three-dimensional bony coverage. The present study investigated the three-dimensional bony coverage of the acetabulum covering the femoral head in hips before and after rotational acetabular osteotomy and in normal hips.

Methods

The computed tomography data of 40 hip joints (12 joints before and after rotational acetabular osteotomy; 16 normal joints) were analyzed. The three-dimensional bony coverage of each joint was evaluated using original software.

Results

The post-operative bony coverage improved significantly compared with pre-operative values. In particular, the anterolateral aspect of the acetabulum tended to be dysplastic in patients with acetabular dysplasia compared to those with normal hip joints. However, greater bony coverage at the anterolateral aspect was obtained after rotational acetabular osteotomy. Meanwhile, the results of the present study may indicate that the bony coverage in the anterior aspect may be excessive.

Conclusion

Three-dimensional analysis indicated that rotational acetabular osteotomy achieved favorable bony coverage. Further investigations are necessary to determine the ideal bony coverage after rotational acetabular osteotomy.

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Acknowledgments

The authors would like to thank Mr. Takeharu Kato (Halley Valley Co., Ltd.), Dr. Tatsuro Karita, Dr. Hirotaka Chikuda, Dr. Shurei Sugita, and Dr. Shigeyuki Tanaka for their invaluable contributions and participation in this study, and also thank Dr. Kosuke Uehara for his valuable suggestions in preparing the revised manuscript.

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Authors and Affiliations

  1. Orthopaedic Surgery, Sensory and Motor System Medicine, Surgical Sciences, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan

    Takeyuki Tanaka, Toru Moro, Hirofumi Oshima & Sakae Tanaka

  2. Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan

    Toru Moro, Yoshio Takatori & Hirofumi Oshima

  3. Bone and Joint Orthopaedic Surgery, Japanese Red Cross Medical Center, 4-1-22 Hiroo, Shibuya-ku, Tokyo, 150-8935, Japan

    Hideya Ito

  4. Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan

    Naohiko Sugita & Mamoru Mitsuishi

Authors
  1. Takeyuki Tanaka
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  2. Toru Moro
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  3. Yoshio Takatori
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  4. Hirofumi Oshima
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  5. Hideya Ito
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  6. Naohiko Sugita
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  7. Mamoru Mitsuishi
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  8. Sakae Tanaka
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Corresponding author

Correspondence to Takeyuki Tanaka.

Ethics declarations

The institutional review board of our hospital granted ethical approval, and informed consent was obtained from all participants before the study commenced.

Conflict of interest

The authors declare that they have no conflict of interest.

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Tanaka, T., Moro, T., Takatori, Y. et al. Evaluation of the three-dimensional bony coverage before and after rotational acetabular osteotomy. International Orthopaedics (SICOT) 42, 2527–2534 (2018). https://doi.org/10.1007/s00264-018-3851-9

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  • DOI: https://doi.org/10.1007/s00264-018-3851-9

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