The condition
The anterior cruciate ligament (ACL) is a strong band in the center of the knee that keeps the shin bone from sliding forward and twisting. It usually tears with a sudden stop, cut, or landing. Without it, the knee can give way with pivoting, damaging the meniscus and cartilage over time.
The surgery
ACL reconstruction is a typically outpatient surgery done through small incisions with a camera. The torn ACL is replaced with a tendon graft (the type will be discussed with you) placed in small bone tunnels. Your surgeon may also treat a torn meniscus or add an outer-knee reinforcement (LET). The final plan is determined during surgery.
Recovery at a glance
- Weight-bearing
- Full weight right away, with crutches until you walk normally (typically 2–4 weeks); no brace. With a meniscus repair: a locked brace and protected weight for ~6 weeks.
- Motion
- Full straightening comes first; bending to ~115° by 6 weeks and full motion by 3 months. Stationary bike from 2–3 weeks.
- Daily life
- Desk work often within 1–2 weeks. No driving while taking narcotic pain medication.
- Running
- Typically 12–16 weeks (not before 16 weeks with a meniscus repair).
- Sports
- No sooner than 8–9 months, after passing strength, hop, and readiness testing; most athletes return at 9–12 months.
A general guide. Your restrictions and timeline may change based on what is found and done at surgery.
Risks & benefits
Benefits: Most patients regain a stable knee and return to sports. Risks are uncommon and include infection, blood clots, graft stretching or re-tear, pain at the front of the knee or with kneeling, injury to nearby structures (such as nerves, blood vessels, or cartilage), stiffness, persistent pain, and the need for further surgery. These will be reviewed with you in detail before surgery.
Patient Surgical Information
Open, save or print. Bring your questions to your pre-op visit.
Before & after every surgery