PMC4799089_01
Radiograph showing the screw inside the knee
gr1.jpg
PMC4799089_01_gr1.jpg
fig1
The radiographic examination (Figure 1) showed the presence of a polyethylene fixation screw that had migrated into the joint cavity.
Migrated screw
gr2.jpg
PMC4799089_01_gr2.jpg
fig2
During the operation, it was observed that the screw was in the medial parapatellar brace and that the femoral joint surface was complete and undamaged (Figure 2).
Placement of new polyethylene
gr3.jpg
PMC4799089_01_gr3.jpg
fig3
The polyethylene was then replaced and new locking screws were emplaced (Figures 3 and 4).
Postoperative control
gr4.jpg
PMC4799089_01_gr4.jpg
fig4
The polyethylene was then replaced and new locking screws were emplaced (Figures 3 and 4).