Internal fixation and unicompartmental knee arthroplasty for an elderly patient with patellar fracture and anteromedial osteoarthritis: A case report

Figure 1 Preoperative images. A: Anteroposterior view; B: Lateral view; C: Varus stress radiography of the left knee showing the patella fracture and classic anteromedial osteoarthritis; D: Preoperative computed tomography of the left knee showing the comminuted patella fracture.

Figure 2 Intraoperative photographs. A: The full layer cartilage of the distal part of the medial condyle of the femur and the anteromedial full-thickness cartilage of the medial tibial plateau were worn. The anterior cruciate ligament was intact and the cartilage of the lateral compartment on both sides was intact; B and C: Photographs after implanting the patellar internal fixations and Oxford prosthesis. There was no impingement between them.

Figure 3 Postoperative radiographs obtained at 3 d after surgery showing good reduction of the patellar fracture and an appropriate Oxford unicompartmental knee arthroplasty. A: Anteroposterior view; B: Lateral view.

Figure 4 Postoperative radiographs obtained at 8 wk after surgery. A: Anteroposterior view; B: Lateral view.

Figure 5 Postoperative radiographs obtained at 12 wk after surgery. A: Anteroposterior view; B: Lateral view.

Figure 6 Postoperative radiographs obtained 20 wk after surgery. A: Anteroposterior view; B: Lateral view.