Table 7.

Complications

Parameters	TKA with Medial Pivot prosthesis	TKA with PFC Sigma prosthesis
Deep infection*	5 knees (2.7%)	1 knee (0.5%)
Superficial infection†	6 knees (3.3%)	0 knee (0%)
Supracondylar fracture (open reduction and internal fixation)	1 knee (0.5%)	—
Deep peroneal nerve palsy (recovered within 1 year)	—	1 knee (0.5%)
Skin edge necrosis	1 knee (0.5%)	—

* Elevated erythrocyte sedimentation rate (> 20 mm/hour), elevated C-reactive protein (> 0.3 mg/dL), positive Gram stain, leukocyte count greater than 1.7 × 10³/μL with a synovial fluid leukocyte differential greater than 65% neutrophils, and positive culture for aerobic or anaerobic bacteria from aspirated synovial fluid; ^†redness, elevation of erythrocyte sedimentation rate (> 20 mm/hour), and C-reactive protein (0.3 mg/dL), but normal aspirated joint fluid (negative Gram stain, leukocyte count < 1.7 × 10³/μL with a synovial fluid leukocyte differential < 65% neutrophils) and negative culture for aerobic or anaerobic bacteria.