Histological coronal sections of rat laryngeal specimens stained with H&E, showing the acellular scaffolds implanted into the left vocal fold wounds (A) 3 days, (B) 7 days, (C) 30 days, and (D) 90 days after surgery (total magnification = 40×). Arrows indicate the implants in the left vocal folds (experimental vocal folds). Images on the left are at higher magnification (400×) showing the interface between the scaffold and the host tissue (1) 3 days, (2) 7 days, and (3) 30 days after surgery (AC = arytenoid cartilage; TA = thyroarytenoid muscle; TC = thyroid cartilage; S = implanted acellular scaffold).