Andrew Bynum injury: 76ers center out 21 days after knee procedure

The Philadelphia 76ers announced on Monday afternoon that newly acquired center Andrew Bynum will be held out of basketball activity for three weeks as a precautionary measure to maximize the effect of the Orthokine therapy he received in September. Philadelphia's first on-court activity for the 2012-13 season will take place on Tuesday at Hagan Arena on the campus of Saint Joseph's University.

Bynum has a bone bruise of the medial femoral chondyle in his right knee, but will still be permitted to participate in conditioning drills.

The Orthokine therapy is a non-invasive, precautionary treatment that spins blood until it is full of healing platelets. Not yet offered in the United States, Bynum traveled to Germany to undergo the procedure. The treatment has been preformed on other NBA stars such as Kobe Bryant and Grant Hill.

Bynum was acquired in August as a primary piece in the blockbuster four-team deal that sent Dwight Howard to the Los Angeles Lakers. In addition, the 76ers also announced on Monday that the team has signed veteran center Mikki Moore for front court depth.