Controlled Release of Mesenchymal Stem Cell-Conditioned Media from a Microsphere/Gel-Based Drug Delivery System for Wound Healing of Tympanic Membrane Perforations

Figure 6

Representative images of H & E-stained guinea pig TMs. Images represent (a) pristine TM; (b) healed perforation and normal physiology; (c) healed perforation but abnormal physiology; (d) residual perforation. Scale bars = 200 nm.

(a)

(b)

(c)

(d)