understanding patella baja in total knee arthroplasty
TRANSCRIPT
Understanding Patella Baja in Total Knee Arthroplasty, Avoiding a Roadblock in Recovery
Patella baja is an abnormally low-lying patella or decreased space
between the inferior pole of the patella and the tibial tubercle
Previous knee surgeries Measurement of patellar height
Anterior cruciate ligament reconstruction Insall-Salvati ratio
Retrograde femoral nail
Infrapatellar fat pad resection
Previous total knee arthroplasty
Determining the etiology will help guide appropriate treatment for patella baja after total knee arthroplasty
Etiology Diagnosis
Treatment
It is an uncommon yet disabling condition of total knee arthroplasty
Surgery
Impingement PainDecreased range of motion
Recovery
Patella baja
Leads to
Blackburne-Peel ratio
Distinction from pseudopatella baja
Tibial tubercle
osteotomy
Distal femoral augment and
revision
Proximalization of patellar component
Modification of anterior tibial component
Z-plasty of patellar tendon
A
A=0.8-1.2
B
B
A
A=0.5-1.0
B
B
A
B
Lum et al. (2020) DOI: 10.5435/JAAOS-D-19-00422
Patella Baja in Total Knee Arthroplasty