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International Orthopaedics
Published in: International Orthopaedics 7/2016

01-07-2016 | Original Paper

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

Authors: Li Liu, Guoyan Zheng, Johannes Dominik Bastian, Marius Johann Baptist Keel, Lutz Peter Nolte, Klaus Arno Siebenrock, Timo Michael Ecker

Published in: International Orthopaedics | Issue 7/2016

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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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Metadata
Title
Periacetabular osteotomy through the pararectus approach: technical feasibility and control of fragment mobility by a validated surgical navigation system in a cadaver experiment
Authors
Li Liu
Guoyan Zheng
Johannes Dominik Bastian
Marius Johann Baptist Keel
Lutz Peter Nolte
Klaus Arno Siebenrock
Timo Michael Ecker
Publication date
01-07-2016
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 7/2016
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-015-2892-6

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