Knee Cartilage Surgery Overview

Knee cartilage surgery is a specialized orthopedic procedure aimed at restoring smooth joint movement, relieving pain, and preventing further knee damage for those affected by cartilage injuries. With the latest techniques including arthroscopy, microfracture, and mosaicplasty, outcomes in 2025 are more effective and recovery timelines are optimized for active lifestyles.

What Is Knee Cartilage Surgery?

Cartilage is a thin, smooth tissue covering the ends of the bones in the knee joint, allowing for low-friction movement and shock absorption. Damage can occur from trauma, sports injuries, overuse, or developmental issues. Since cartilage has a limited ability to heal itself, untreated defects can cause chronic pain, swelling, locking, and eventually progress toward arthritis.

Knee cartilage surgery treats lesions that don’t heal on their own—especially when there’s a loose flap or fragment, locking symptoms, or a major defect. The main goals are to:

• Restore a smooth, functioning surface

• Relieve pain, swelling, and instability

• Enable a return to daily activities and sports

• Prevent progressive joint deterioration

Types of Knee Cartilage Surgery & Modern Techniques

1. Arthroscopic Surgery

   • Minimally invasive, using a camera and fine instruments via small incisions.

   • Suited for loose body removal, microfracture, and some cartilage reattachment procedures.

2. Cartilage Reattachment (Osteochondral Fixation)

   • For deep, broad lesions where a fragment of cartilage (and underlying bone) has detached.

   • The surgeon repositions the fragment and fixes it with a screw, promoting healing.

3. Microfractures

   • Tiny holes are made in the bone beneath the defect to release marrow cells, which form a new cartilage-like surface.

   • Best for smaller, contained lesions.

4. Mosaicplasty

   • Small plugs of healthy cartilage and bone are transplanted from non-weight-bearing areas to fill larger defects.

   • Used for more extensive defects not suitable for microfracture.

What to Expect: Surgery & Recovery Timeline

• Hospital Stay: Arthroscopic surgery is usually 1–2 days; mosaicplasty might require 3–4 days.

• Rehabilitation: Starts immediately to maintain flexibility and muscle strength.

• Weight-Bearing:

  • Reattachment/mosaicplasty: Use crutches for 6 weeks; no full weight on knee.

  • Microfractures: Non-weight-bearing for 3 weeks.

• Back to Activity:

  • Office work: 1–2 months post-op, depending on mobility.

  • Light sports (cycling, swimming): As early as 2–3 months.

  • Full return to all sports: 4–6 months post-op.

• Healing Rates:

  • Osteochondral fixation: 75–90% healing, especially for traumatic injuries.

  • Microfracture: 80% improvement for isolated lesions.

  • Mosaicplasty: Good results in up to 90% for femur, 85% for tibia, 80% for patella.

Benefits and Risks

Benefits:

• Pain relief, restored movement, prevention of further joint damage

• Restoration of knee stability and reduction of swelling/locking

Risks:

• Infection, stiffness, re-injury, need for further surgery

• Mosaicplasty may cause mild discomfort at the donor site (in about 15% of cases)

Your surgeon will discuss personalized risks and recovery expectations based on your specific condition.