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A biomechanical comparison of three fixation techniques in osteoporotic reverse oblique intertrochanteric femur fracture with fragmented lateral cortex

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European Journal of Trauma and Emergency Surgery Aims and scope Submit manuscript

A Correction to this article was published on 04 March 2019

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Abstract

Background

The treatment of the reverse oblique osteoporotic femur fractures is still problematic and can be complicated especially that are accompanied by a fragmented lateral cortex.

Aim

The aim of this study was to compare three different internal fixation methods in the osteosynthesis of osteoporotic reverse oblique intertrochanteric femur fracture models with a fragmented lateral cortex.

Study design

Biomechanical experiment study.

Methods

A total of 24 osteoporotic femur models were obtained and divided into three groups [Group A: Proximal femoral nail (PFN), Group B: 95° angled blade plate (ABP), and Group C: proximal femoral anatomic locking plate (PFLP)] with each group which include eight bones. A standard fracture configuration was created as a reverse oblique intertrochanteric fracture and fixed with these implants. After fixation, all femur constructs were tested with an Instron 5800R tester (Instron, Canton, MA) in the biomechanics laboratory with axial loading and bending forces to assess axial and rotational stiffness and failure load. Displacement over 10 mm and angulation greater than 10° in the fracture line were considered as failure.

Results

In all tests, ABP had statistically poorer results in comparison to the PFN and PFLP group. PFLP fixation had better biomechanical fixation results in comparison to the PFN group, although the results were not statistically significant.

Conclusion

Orthopaedic surgeons should keep in mind that lateral cortex comminution brings further instability to these reverse oblique intertrochanteric osteoporotic fractures and high rates of failure may be encountered due to this instability. PFLP fixation may be an alternative fixation method biomechanically for these instable fractures.

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Change history

  • 04 March 2019

    This study was done with the financial support of the Istanbul University Scientific Research Projects.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Department of Orthopedics and Traumatology, Istanbul University Faculty of Medicine, Istanbul, Turkey

    Gökhan Polat, Turgut Akgül, Mehmet Ekinci & Serkan Bayram

Authors
  1. Gökhan Polat
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  2. Turgut Akgül
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  3. Mehmet Ekinci
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  4. Serkan Bayram
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Correspondence to Serkan Bayram.

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Polat, G., Akgül, T., Ekinci, M. et al. A biomechanical comparison of three fixation techniques in osteoporotic reverse oblique intertrochanteric femur fracture with fragmented lateral cortex. Eur J Trauma Emerg Surg 45, 499–505 (2019). https://doi.org/10.1007/s00068-018-1061-1

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  • DOI: https://doi.org/10.1007/s00068-018-1061-1

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