ligament injury

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In sport, usually physical damage to a ligament that deforms or tears the collagen fibres that make up the ligament. Ligament injuries are classified according to the degree of damage; in a grade I injury or sprain, there is no macroscopic tear in the fibres; in grade II, or partial tears, some fibres are torn or partly torn, causing joint instability; in grade III or complete tears, most or all of the fibres of the ligament are torn and the joint may be dislocated or substantially disrupted. Assessment of a ligament injury is by stress testing in various positions of the joint.

Subjects: Sports and Exercise Medicine.

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