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. 2023 Jan 16;6(1):e1067. doi: 10.1002/hsr2.1067

Table 1.

Kumar's three category system

Class I: Temporary impervious dressing materials
  • 1.
    Single‐layered
    • 1.1. Biological dressing substitute, for example, amniotic membrane or potato peel
    • 1.2. Synthetic dressing substitute, for example, synthetic polymer sheet, polymer foam/spray
  • 2.
    Bi‐layered
    • 2.1. Tissue engineered material, for example, polymer membrane and fibroblasts cells on nylon mesh
Class II: Single‐layer durable skin substitutes
  • 1.
    Epidermal substitutes, for example, cultured epithelial autograft (CEA)
  • 2.
    Dermal substitutes, for example, bovine collagen sheet, porcine collagen sheet, bovine, or human dermal matrix
Class III: Composite skin substitutes
  • 1.
    Skin grafts, for example, xenografts and allografts
  • 2.
    Tissue engineered skin, for example, Integra®, Biobrane®