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A scar (or scar tissue) is an area of fibrous tissue that replaces normal skin after an injury. Scars result from the biological process of wound repair in the skin, as well as in other organs , and tissues of the body.
A keloid scar is benign and not contagious, but sometimes accompanied by severe itchiness, pain, [2] and changes in texture. In severe cases, it can affect movement of skin. In the United States, keloid scars are seen 15 times more frequently in people of sub-Saharan African descent than in people of European descent. [3]
Scar free healing is the process by which significant injuries can heal without permanent damage to the tissue the injury has affected. In most healing, scars form due to the fibrosis and wound contraction, however in scar free healing, tissue is completely regenerated. During the 1990s, published research on the subject increased; it is a ...
Timing is important to wound healing. Critically, the timing of wound re-epithelialization can decide the outcome of the healing. [11] If the epithelization of tissue over a denuded area is slow, a scar will form over many weeks, or months; [12] [13] If the epithelization of a wounded area is fast, the healing will result in regeneration.
Fibrosis, also known as fibrotic scarring, is a pathological wound healing in which connective tissue replaces normal parenchymal tissue to the extent that it goes unchecked, leading to considerable tissue remodelling and the formation of permanent scar tissue. [1] [2]
A hypertrophic scar is a cutaneous condition characterized by deposits of excessive amounts of collagen which gives rise to a raised scar, but not to the degree observed with keloids. [1] Like keloids, they form most often at the sites of pimples, body piercings, cuts and burns. They often contain nerves and blood vessels.
MUAs can lead to adverse outcomes, including fractures, rupture of tendons, damage to the prosthesis, heterotrophic ossification, muscle tears and bleeding and the return of scar tissue. [3] For these reasons treatment patterns vary widely. MUA after TKA is more likely to be to be successful if performed in the first 8–12 weeks after surgery.
Pressure garments apply mechanical pressure to the surface of the scar, reducing the supply of blood and oxygen to the scar tissue. Formation of excessive scar tissue is thus prevented. The combination of silicone gel sheeting and compression therapy has been proven to be more effective than using the sheet alone. [26]