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How to reduce osteopenia in total knee arthroplasty?

  • Claude SchwartzEmail author
Original Article • KNEE - ARTHROPLASTY

Abstract

Background

Osteopenia of the front half of the distal femur is a well-known problem after total knee arthroplasty (TKA) with secondary issues after years, especially when must be addressed fractures or revisions for loosening. Stress shielding has been recognized as a cause in different biomechanical studies of the bone.

Question/purposes

It was logical to look for a solution by changing the design to minimize stress shielding behind the femoral shield.

Patients and methods

It was proved that radiological measure of bone density was reliable although not so early and accurate as densitometry. We used a shield without posterior fixation of the trochlea in a series of 21 TKA with radiological measures, preoperative, at 3 months and at 5 years. We compared the results with those of a series of classical TKA in the same category of age and sex.

Results

The TKA without trochlea posterior fixation presented a significantly reduced osteopenia compared to the classical design of the femoral shield.

Conclusion

It seems that the non-fixation of the posterior surface of the trochlea may reduce osteopenia in TKA and so the risk of fractures and complications when revision surgery.

Level of evidence

2a.

Keywords

Total knee arthroplasty Osteopenia Biomechanics Prosthesis design 

Notes

Acknowledgements

Patrick Furno, Jacques Hummer, and Didier Mainard are acknowledged for their cooperation.

Compliance with ethical standards

Conflicts of interest

The author declares that funds are coming in due to the licensed patent to FH Orthopedics, 68,990 Heimsbrunn, France, but he did not receive any financial support for this study.

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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Clinique des 3 frontièresSaint-LouisFrance

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