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Updated: Feb 6, 2026
10:10
Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
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How to reduce osteopenia in total knee arthroplasty?
1Clinique des 3 frontières, rue Saint Damien, 68300, Saint-Louis, France. schwartzop@gmail.com.
Summary
Modifying total knee arthroplasty (TKA) femoral shields by not fixing the posterior trochlea significantly reduced bone loss (osteopenia). This design change may lower risks of fractures and complications during revision surgery.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Bone densitometry
Background:
- Distal femur osteopenia is a known complication after total knee arthroplasty (TKA).
- This bone loss can lead to secondary issues like fractures and loosening, necessitating revision surgery.
- Stress shielding, a biomechanical phenomenon, is implicated as a cause of TKA-related osteopenia.
Purpose of the Study:
- To investigate a modified TKA femoral shield design aimed at minimizing stress shielding.
- The goal was to reduce osteopenia in the distal femur following TKA.
Main Methods:
- A series of 21 TKAs utilized a femoral shield without posterior trochlear fixation.
- Radiological bone density measurements were taken preoperatively, at 3 months, and at 5 years post-surgery.
- Results were compared to a control group receiving classical TKA with standard femoral shields.
Main Results:
- TKAs with the modified femoral shield (no posterior trochlear fixation) showed significantly less osteopenia.
- This reduction in bone loss was observed compared to the classical TKA design.
Conclusions:
- Non-fixation of the posterior trochlear surface in TKA femoral shields appears to reduce osteopenia.
- This design modification may decrease the incidence of fractures and complications associated with revision surgery.
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