An ACL injury is one of the most common serious knee injuries and involves a complete tear or rupture to the Anterior Cruciate Ligament (ACL). The human knee is vulnerable to injury because it connects two very long bones, the femur (thigh bone) and the tibia (shin bone). These two long levers can exert incredible force at the knee joint.
Dr. David Colvin, orthopaedic surgeon in Perth. David's specialty is knee and shoulder surgery and sports injuries.
What is the Anterior Cruciate Ligament?
The ACL is a tough, rope like ligament that connects and stabilises the femur (thigh bone) to the tibia (shin bone). It is about four centimetres long and as thick as a pencil. A functioning ACL is critical to knee stability.
The knee joint is held together by four major ligaments. There’s one ligament down each side of the knee - the Medial Collateral Ligament on the inside, and the Lateral Collateral Ligament on the outside. Then there are two major ligaments in the middle of the knee that cross over from front to back. These are the Anterior Cruciate Ligament, which stops the tibia moving forward, and the Posterior Cruciate Ligament which stops the tibia from moving backwards.
The cruciate ligaments also have a significant role in controlling the rotation of the knee. For that reason, it is often a rotational injury such as cutting and changing the direction that causes the ACL to tear.
What are the symptoms of an ACL injury?
The ACL is a very strong ligament, and many people hear and feel a pop from the knee as the ‘rope’ snaps.
Other ACL injury symptoms include:
- Severe knee swelling within the first twenty-four hours. This usually indicates bleeding into the knee.
- Stiffness preventing you from fully straightening or fully bending the knee.
- A feeling of insecurity in the knee. It may give way, particularly with change of direction activities.
ACL Graft Choices
ACL Reconstruction FAQ
If you suffer from an injury to the anterior cruciate ligament in your knee, you may have questions about the ACL tear and the surgery you need. I have created a page listing some of the most frequently asked questions about ACL reconstruction.
Get in touch with us!
Dr David Colvin consults at:
Western Orthopaedic Clinic
Suite 213, 25 McCourt Street,
Subiaco WA 6008 (Perth)
- These rooms are part of St John of God Subiaco Hospital.
- Parking is available on site.
Dr David Colvin operates at: