What are common mechanisms of injury for the knee?

The major forces acting on the knee joint include translation (anterior and posterior), angulation (varus and valgus), rotation (internal and external), hyperextension, axial load, and direct blow. Most knee injuries are the result of two or more forces exerted across either a flexed or extended joint.

How do you sprain your LCL?

An LCL sprain usually occurs when the knee pushes out beyond the usual range of motion….An LCL sprain may have causes including:

direct contact to the inside of the knee, such as in a collision or a tackle.
poor landing technique.
suddenly changing direction while running.
twisting the knee when the foot is stationary.

What is the mechanism of an ACL injury?

ACL injuries can happen when the foot is planted firmly, the knee locks and twists or pivots at the same time. It is common when an athlete attempts to change direction rapidly. This sudden change puts tremendous strain on the ACL, which can lead to the injury and resulting slow-motion replay.

How do you assess an LCL injury?

While most LCL tears can be diagnosed without medical imaging, a doctor may order an x-ray or MRI to rule out other possible injuries and to determine the severity of an LCL tear. X-ray. An x-ray shows bones and can help determine if there is a fracture.

What are the two mechanisms of injury for an ACL tear?

Mostly it is a non-contact deceleration where the athlete suddenly turns to the opposite side of the planted knee and injures it. As the patient turns and pivots the ligament tears. In basketball, it is usually a result of hyperextension and internal rotation of the tibia on the femur, associated with deceleration.

What are the two most common mechanisms of injury for an ACL tear causes )?

A contact event, where another athlete, object, or force puts the knee in a position that causes the ACL to rupture or a non-contact event where the athlete is cutting, decelerating, jumping, or landing that pushes the knee into a position with enough force that it causes the ACL to rupture.

What kind of injury can cause the LCL to be torn?

A contact injury, such as a direct blow to the medial side of the knee, or a noncontact injury, such as a hyperextension stress, may result in a varus force across the knee injuring the LCL. In terms of functionality, the LCL has often been grouped with the popliteofibular ligament and the popliteus tendon as the posterolateral corner (PLC).

How does the lateral collateral ligament ( LCL ) work?

Lateral Collateral Knee Ligament Injury 1 Background. Lateral collateral ligament (LCL) injuries result from a varus force across the knee. 2 Functional Anatomy. The LCL is a round ligament that originates close to the lateral epicondyle… 3 Sport-Specific Biomechanics.

How to diagnose LCL injury of the knee?

PLC, ACL). Diagnosis can be suspected with increased varus laxity on physical exam but require MRI for confirmation. Treatment can be nonoperative or operative depending on the severity of injury to the LCL as well concomitant injuries to surrounding structures and ligaments in the knee. What is a positive dial test?

What causes a LCL or popliteus tendon injury?

The PLC, which includes the LCL, popliteofibular ligament, and popliteus tendon, is the primary restraint to external rotation stress across the knee. An LCL injury may be caused by a direct blow to the anteromedial aspect of the knee or a noncontact varus or hyperextension injury.

What are common mechanisms of injury for the knee? The major forces acting on the knee joint include translation (anterior and posterior), angulation (varus and valgus), rotation (internal and external), hyperextension, axial load, and direct blow. Most knee injuries are the result of two or more forces exerted across either a flexed or extended joint.…