Observation of hair with scanning electron microscope (×300). (a) At 1 week after implantation, a certain number of epithelial cells and fibroblasts surrounded the hair. (b) At 1 month, epithelial cell and fibroblasts still existed. (c, d, e) After 3, 8, and 12 months implantation, the fibroblasts were increased, but the epithelial cells were somewhat reduced. At 12 months, the hair structure was still clear, and no degradation was identified.