Reasons for TKA revision

Question 1

What is the most common reason for late revision (>2 years from primary)?

Answer 1

Aseptic component loosening

Question 2

Which type of aseptic loosening is the most common?

Answer 2

tibial

Question 3

What is important to rule out before any revision?

Answer 3

infection

Question 4

What is the most common reason for early revision (<2 years from primary?)?

Answer 4

Septic failure

Question 5

What are the causes of flexion instability?

Answer 5

PCL attenuation
Unbalanced flexion gap
excessive posterior slope
undersized femoral component
femoral component placed in excessive extension

Question 6

What are the most common causes for need for TKA revision?

Answer 6

• Aseptic component loosening (39%)
• Septic failure (27%)
• Ligament/flexion instability (8%)
• Periprosthetic fracture (5%)
• Arthrofibrosis (5%)
• Patellofemoral maltracking
• Abnormal joint line problems
• Patellar clunk
• Metal hypersensitivity