1. Keivan Ahadi Knee Surgeon Isfahan,Jan 8th 2016
Converting UKA to TKA
Keivan Ahadi
Knee Surgeon
Isfahan,Jan 8th 2016

2. Failure Mode Instability Loosening Poly wear/osteolysis
Progressive osteoarthritis
Infection
Fracture

3. Pre-operative planning UKA to TKA
Conversion can be difficult
May require revision component
Dictated by level of bone loss and ligamentous instability
Increased complexity by Tibial fracture,specific Uni designs

4. Avoid
Unexplained Pain

5. Always R/O Infection Before Revision

6. Technical Points
Make distal femoral cut with femoral component retained
Avoid over resection
Maintain extension gap
Femoral bone defect is rarely a problem
Avoid over resection of tibia

7. Technical Point
Posterior condylar axis is not a good index for femoral component Rotation because of posteromedial deficiency
Other tools:
Transepicondylar axis
Whiteside line

8. Amount of bone defect and Ligamentous Stability
Normal TKA, PS or CR
Cement,screw for tibial bone defects
Augments and stems
Constrained prosthesis
Sometimes only Poly exchange is enough

12. ICJR Cleveland Arthroplasty Course 2011 Featuring
Conversion UKA to TKA
ICJR Cleveland Arthroplasty Course 2011 Featuring
Robert Molloy

13. سپاسگزارم