Fracture occurring around a Knee which has undergone Total Knee Replacement are called Periprosthetic Fractures. Although not very commonly seen, Fractures in a prosthetic Knee have been reported in international literature. Fractures of Femur, Tibia and Patella can all occur following injury to the prosthetically replaced Knee.
Anterior-Posterior views, lateral views and oblique views are all required.
Non-operative treatment is avoided, except in patients with excessive comorbidity. This may include traction or plaster cast.
The Fractures can be fixed by retrograde nailing of the Femur Fracture or by fixation with a plate and screws.
These Fractures usually involve the Medial or Lateral Condyle of the Tibia.
X-rays: Anterior Posterior Views and Lateral Views
Fracture may be missed if undisplaced
If strongly suspected Fracture due to anterior Knee Pain and not visible on X-ray.
Conservative management involves immobilization in a plaster cast from groin to ankle for a period of 6 weeks, after which Knee is mobilized with the help of continuous passive movement machine.
This involves partial or complete Patellectomy depending upon whether the component is in place.
Partial Patellectomy: If component is in place.
Complete Patellectomy : If component is loose.