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Periacetabular osteotomy through the pararectus approach: technical feasibility and control of fragment mobility by a validated surgical navigation system in a cadaver experiment

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Abstract

Purpose

The pararectus approach has been validated for managing acetabular fractures. We hypothesised it might be an alternative approach for performing periacetabular osteotomy (PAO).

Methods

Using four cadaver specimens, we randomly performed PAO through either the pararectus or a modified Smith-Petersen (SP) approach. We assessed technical feasibility and safety. Furthermore, we controlled fragment mobility using a surgical navigation system and compared mobility between approaches. The navigation system’s accuracy was tested by cross-examination with validated preoperative planning software.

Results

The pararectus approach is technically feasible, allowing for adequate exposure, safe osteotomies and excellent control of structures at risk. Fragment mobility is equal to that achieved through the SP approach. Validation of these measurements yielded a mean difference of less <1 mm without statistical significance.

Conclusion

Experimental data suggests the pararectus approach might be an alternative approach for performing PAO. Clinical validation is necessary to confirm these promising preliminary results.

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Conflict of interest

The authors declare that they have no conflict of interest.

Research involving human participants and IRB approval

All studies were approved by the appropriate institutional and/or national research ethics committee and were performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

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Authors and Affiliations

  1. Institute for Surgical Technology and Biomechanics, University of Berne, Bern, Switzerland

    Li Liu, Guoyan Zheng, Marius Johann Baptist Keel & Lutz Peter Nolte

  2. Department of Orthopaedic Surgery, Inselspital, University of Berne, Bern, Switzerland

    Johannes Dominik Bastian, Klaus Arno Siebenrock & Timo Michael Ecker

Authors
  1. Li Liu
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  2. Guoyan Zheng
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  3. Johannes Dominik Bastian
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  4. Marius Johann Baptist Keel
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  5. Lutz Peter Nolte
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  6. Klaus Arno Siebenrock
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  7. Timo Michael Ecker
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Corresponding author

Correspondence to Timo Michael Ecker.

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Liu, L., Zheng, G., Bastian, J.D. et al. Periacetabular osteotomy through the pararectus approach: technical feasibility and control of fragment mobility by a validated surgical navigation system in a cadaver experiment. International Orthopaedics (SICOT) 40, 1389–1396 (2016). https://doi.org/10.1007/s00264-015-2892-6

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  • DOI: https://doi.org/10.1007/s00264-015-2892-6

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