Table 2.
Most Commonly Reported Measurements by Category for the Assessment of Patellar Instabilitya
Measurement | No. of Studies |
---|---|
Patellar tracking | |
TT-TG distance | 59 |
Congruence/Merchant angle | 13 |
Patellar lateral displacement shift | 9 |
TT-PCL distance | 9 |
2-/3-dimensional knee rotation angle | 6 |
Tibial/tibial tubercle torsion | 6 |
Trochlear morphology | |
Femoral/trochlear sulcus angle | 19 |
Dejour classification | 12 |
Trochlear groove depth | 10 |
Lateral trochlear or facet inclination / tilt angle | 9 |
Patellar height | |
Insall-Salvati/modified Insall-Salvati ratio | 26 |
Caton-Deschamps index | 26 |
Blackburne-Peel ratio | 5 |
Patellar trochlear index | 5 |
Patellar inclination | |
Patellar tilt, inclination angle, lateral patellofemoral angle | 22 |
Lateral patellofemoral angle | 6 |
Soft tissue description | |
MPFL thickness | 5 |
VMO morphology | 3 |
Patellar morphology | |
Patellofemoral contacting surface ratio | 2 |
Wiberg classification | 2 |
Patellar length | 2 |
aMPFL, medial patellofemoral ligament; TT-PCL, tibial tubercle–posterior cruciate ligament; TT-TG, tibial tubercle–trochlear groove; VMO, vastus medialis obliquus.