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Bulking materials were injected into the injured anal sphincter and were removed along with surrounding tissue after 6 months. (a) A 3 mm Bovie incision was made on the left side of the anus. (b) A volume of 0.1 mL of each bulking material was injected into the anus 1 week after the sphincter’s injury. (c) The bulking implant (red circle) with surrounding tissue was removed en bloc.
