Technique of reconstruction of chronic rupture of patellar tendon using Achilles tendon allograft. A, Slot measuring 3.0 cm long, 2.0 cm wide, and 1.5 cm deep is cut in tuberosity; graft is contoured to fit. B, Central arm of graft is placed through 9 mm longitudinal tunnel and then through vertical slit in quadriceps tendon. Tunnel is placed centrally to avoid penetration of articular cartilage. C, Graft is secured with multiple sutures. SEE TECHNIQUE 48.24.