Figure 2.

Visual representation of Kumar’s classification system. Kumar’s classification system is a widely used, imperfect classification system for organizing skin substitutes. The classification system denotes three classes. Class I is comprised of temporary, impervious dressing materials and is further divided into single layer and bilayer substitutes. Single layer substitutes may be naturally occurring or synthetic. Class II substitutes are single layer, durable skin substitutes which are either dermal or epidermal. Class III substitutes are composite substitutes that contain both epidermal and dermal layers.