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A Male, 45 years old, direct blow, anteroposterior and lateral radiographs of the left knee showed patellar comminuted fractures preoperatively and B postoperatively at 1 year, the fracture was well healed. C Anteroposterior and lateral radiographs of the left knee postoperatively at the final follow-up showed patellofemoral arthritis. D Range of motion was restored normally at the final follow-up
