- Discussion:
- in normal knees, constant relationship exists between
length of patella (LP)
and length of the
patella tendon (LT);
-
length of tendon (LT) is measured on its post surface from the lower
pole of patella to its insertion on top of tibial tubercle;
-
length of patella by definition is greatest diagonal length measured;
- ratio of
LP to LT is 1:0, with less than 20% variation;
- hence, length of
Patellar Tendon is approx. = to length of the patella;
- avg. ratio (
LT/LP) = 1.02 w/ SD of 0.13;
- LP to LT ratio of
less than 1:0 indicates possible
Patella Alta;
- describes normal patellar ht. in relationship to
Patellar Tendon;
- Agliettis et. al. Clin. Ortho 1983
- 150 rt knees:
-
LT/LP ratio: 1.04 (0.8 to 1.38) males = 1.01 vs females = 1.06
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Observations on patellar height after proximal tibial osteotomy.
The modified Insall-Salvati ratio for assessment of patellar height.
