Problems can occur. Some are minor but some may need another operation to help. It is clearly important to understand these risks before undergoing surgery.
The main risks include:
- Failure to provide enough stability in the knee to allow return to full sporting activities. Either the ligament does not heal in a tight enough position to allow full confidence in the leg, or there is associated damage inside the knee that prevents return to full function.
- Patella pain or discomfort in the front of the knee joint during activities such as squatting or sitting with the knee bent can develop in 10 – 20% of patients, but this usually improves with specific rehabilitation. More importantly, it can be prevented by appropriate early rehabilitation and by closely following the guidelines and advice in this booklet.
- Complications of deep vein thrombosis, and wound infection can occur as in all operations. The risk is approximately 1 – 2%.
- Re-rupture of the graft, which occurs in approximately 2 – 4% of cases over 10 years. This is similar to the risk of rupturing the ligament in the other knee.