How long does cartilage repair surgery take to work for knee cartilage injury?

The procedure may restore or stimulate a cartilage surface, but the knee needs protection while the repair develops. Your surgeon may limit weight-bearing, knee bending, or impact activity at first. A reduction in pain does not necessarily mean the repair is ready for running, jumping, or pivoting.

The timetable depends on the repair method, defect size and position, additional ligament or meniscus work, age, muscle condition, and whether the knee was injured again. Progress is measured through swelling, range of motion, control, strength, and functional tests rather than one fixed milestone.

Use crutches, a brace, or movement limits exactly as directed. Attend rehabilitation appointments and practise only the exercises prescribed for your stage. Manage swelling, keep the incision clean, and build strength gradually; rushing impact exercise can overload healing tissue even when the knee feels better.

Ask before changing work, driving, cycling, gym exercises, or sport. Keep a record of swelling and pain after activity so the rehabilitation team can adjust the load.

Call the surgical team for increasing wound redness, drainage, fever, calf swelling, new calf pain, or pain that escalates rather than settles. Seek urgent help for chest pain or sudden breathlessness. Report a locked knee, a new giving-way episode, or a sharp change after a twist or fall.

Ask which repair was performed, how long weight-bearing and bending restrictions last, what signs show readiness for each activity, and how rehabilitation will test strength before return to sport.