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Macroscopic view of the casting step of bACL. (A) A picture showing the casting step of a bACL of the second generation, using absorbable surgical thread braided and placed in a cylinder of 30 cm high and 10 cm diameter, filled with a solution of 2 mg/mL Type I bovine collagen that polymerized around the thread (B). Note that the collagen matrix has become a gel within 20 min at room temperature that can be manipulated outside its casting tube.
