The anatomy of the patellar tendon

The morphology of the attachment of the patellar tendon, its bundle orienta tion, the differential fascicles length and the position of the apex of the patella were assessed in 22 cadaveric human knees. The patellar apex was 3 9+/-6% of the width of the tendon from its medial edge. The bulk of tendon was attached to the distal two-thirds of the anterior aspect of the patella . In six cases tendon fibres originated from the posterior surface of the a pex of the patella, forming a ridge on the back of tendon. This may represe nt an anatomical variant accounting for the increased tendon thickness note d on MRI, both incidentally and during assessment for patellar tendonitis, Fascicles were parallel in the sagittal plane but converged in the frontal plane toward their tibial attachment. When bone-patellar tendon-bone (B-PT- B) grafts were harvested, as for anterior cruciate ligament reconstruction, the grafts narrowed distally. When harvesting B-PT-B, the oblique orientat ion of the fibres in the coronal plane must be borne in mind.