<P> In medicine, an avulsion is an injury in which a body structure is forcibly detached from its normal point of insertion by either trauma or surgery (from the Latin avellere, meaning "to tear off"). The term most commonly refers to a surface trauma where all layers of the skin have been torn away, exposing the underlying structures (i.e., subcutaneous tissue, muscle, tendons, or bone). This is similar to an abrasion but more severe, as body parts such as an eyelid or an ear can be partially or fully detached from the body . </P> <P> The most common avulsion injury, skin avulsions usually occur during motor vehicle collisions . The severity of avulsion ranges from skin flaps (minor) to degloving (moderate) and amputation of a finger or limb (severe). Suprafascial avulsions are those in which the depth of the removed skin reaches the subcutaneous tissue layer, while subfascial avulsions extend deeper than the subcutaneous layer . Small suprafascial avulsions can be repaired by suturing, but most avulsions require skin grafts or reconstructive surgery . </P>

What does avulsion mean in relation to orthopedic injuries