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Lacerations – irregular tear-like wounds caused by some blunt trauma. Lacerations and incisions may appear linear (regular) or stellate (irregular). The term laceration is commonly misused in reference to incisions. [9] Abrasions (grazes) – superficial wounds in which the topmost layer of the skin (the epidermis) is scraped off.
A contusion is the discoloration of the skin, which results from underlying muscle fibers and connective tissue being crushed. This can happen in a variety of ways such as a direct blow to the skin, or a fall taken against a hard surface. The discoloration in the skin is present when blood begins to pool around the injury.
Wound healing refers to a living organism's replacement of destroyed or damaged tissue by newly produced tissue. [1] In undamaged skin, the epidermis (surface, epithelial layer) and dermis (deeper, connective layer) form a protective barrier against the external environment. When the barrier is broken, a regulated sequence of biochemical events ...
Abrasions are superficial injuries to the skin no deeper than the epidermis tissue layer, and bleeding, if present, is minimal. Minor abrasions generally do not scar, but deeper abrasions generally bleed and may scar. Blunt trauma causes sports-related lacerations, resulting in burst-type open wounds with jagged irregular edges.
The injury occurs due to trauma that results in a shearing force. [6] This force causes the layer of fat below the skin, the superficial fascia, to separate from the deep fascia and muscle beneath. [7] [6] This separation also damages blood and lymphatic vessels. [7] Blood and lymphatic fluid can then fill the space that was created. [7]
In a major injury, if epithelial cell migration and tissue contraction cannot cover the wound, suturing the edges of the injured skin together, or even replacement of lost skin with skin grafts, may be required to restore the skin. As epithelial cells continue to migrate around the scab, the dermis is repaired by the activity of stem cells.
Skin trauma is serious and altering physical injury experienced by the skin or multiple layers of epithelial tissues. [1] This can be in the form of cuts, burns ...
Granulation tissue is new connective tissue and microscopic blood vessels that form on the surfaces of a wound during the healing process. [1] Granulation tissue typically grows from the base of a wound and is able to fill wounds of almost any size. Examples of granulation tissue can be seen in pyogenic granulomas and pulp polyps.