- See:
- Lateral radiograph of the Knee
- Patella Infera
- Subluxation of the Patella
- Discussion:
- patella alta refers to an abnormally high patella in relation to femur;
- may result in Subluxation and dislocation of patella;
- Associated Conditions:
- dislocation or subluxation of the patella;
- abnormal trochlea;
- hypoplasia of the vastus medialis
- Radiographs:
- position of patella can best be determined on the Lateral Radiograph w/ the knee flexed at 30 deg;
- Insall's Ratio:
- length of patella ligament = diagonal length of patella;
- variations of more than 20% are considered abnormal;
- Blackburne Method
- Treatment:
- lateral retinacular release is a poor choice in this condition
Patella alta and patella infera. Their etiological role in patellar dislocation, chondromalacia, and apophysitis of the tibial tubercle.