A break in the skin is first plugged by a clot, which serves as the scaffolding of the repair process. Inflammatory cells enter, followed by fibroblast and capillaries. A fibroblast is a type of cell that synthesizes the extracellular matrix and collagen. The epidermal edges move to cover the wound surface. For all this to happen, signals must be sent to stimulate normally dormant cells into action. The following technologies all attempt to aid the body in rapid and effective healing.