Fig. 1
From: The dysplastic trochlear sulcus due to the insufficient patellar stress in growing rats
Detailed procedure of the operations: a, open the joint capsule through the incision of the medial retinaculum. b, in the dislocation group, lateral dislocating the patella using tweezers. c, in the patellectomy group, reversing the patellar to unfold the patellar articular facets, then separated the patellar from the tissue. d, in the patellectomy group, the incision was closed by 5–0 absorbable suture, in the dislocation group, the incision medial joint capsule was open for the natural healing