Knee Cartilage Injury Treatment Options

For minor cartilage injuries or patients seeking less invasive options, nonsurgical treatments may effectively manage symptoms and promote joint health.

1. Rest, Ice, Compression, and Elevation (RICE): Acute injuries often benefit from the RICE protocol to reduce swelling and provide initial relief. Rest minimizes further damage, while ice application decreases inflammation.
2. Physical Therapy: Customized physical therapy programs focus on strengthening the muscles around the knee, improving joint stability, and enhancing mobility. Therapists use targeted exercises and modalities like electrical stimulation to alleviate discomfort and prevent further injury.
3. Medications: Nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly prescribed to reduce pain and inflammation. In some cases, corticosteroid injections may provide temporary relief by targeting localized inflammation.
4. Viscosupplementation: Hyaluronic acid injections help lubricate the joint, enhancing its cushioning properties and improving movement. This option is particularly beneficial for patients with cartilage degeneration due to osteoarthritis.
5. Platelet-Rich Plasma (PRP): PRP therapy involves injecting a concentrated solution of platelets derived from the patient’s blood into the injured area. These platelets release growth factors that stimulate healing and reduce inflammation.

When nonsurgical methods are insufficient or the damage is severe, surgical interventions may be necessary to repair or replace damaged cartilage.

Arthroscopic Debridement and Chondroplasty

In this minimally invasive procedure, damaged cartilage is smoothed or removed to prevent further breakdown. Arthroscopy also allows the surgeon to assess the extent of the injury and address additional joint concerns.

Microfracture

Microfracture surgery is a technique that creates small holes in the bone beneath the damaged cartilage. This encourages the formation of fibrocartilage—a type of scar tissue cartilage that fills the lesion. While not as durable as natural articular cartilage, fibrocartilage can improve joint function and alleviate pain.

Osteochondral Autograft Transplantation (OATS)

OATS involves transplanting healthy cartilage and bone from a non-weight-bearing area of the knee to the damaged site. This procedure is ideal for younger patients with localized cartilage defects. The transplanted cartilage integrates into the surrounding tissue, restoring the joint surface.

Osteochondral Allograft Transplantation

For larger cartilage defects, allografts sourced from donors are used to replace the damaged area. Allografts are beneficial when there is insufficient healthy cartilage for autograft procedures.

Autologous Chondrocyte Implantation (ACI)

ACI is a two-stage procedure that begins with harvesting healthy cartilage cells (chondrocytes) from the patient’s knee. These cells are then grown in a laboratory to increase their quantity and later implanted into the damaged area. ACI is an excellent option for patients with moderate to severe cartilage damage.

Matrix-Induced Autologous Chondrocyte Implantation (MACI)

MACI builds on the ACI procedure by using a scaffold to deliver the cultured chondrocytes to the defect site. This technique ensures even cell distribution and promotes better integration into the surrounding cartilage.

Meniscus Repair or Transplantation

For injuries involving the meniscus, repair is often the first choice when possible. In cases where the meniscus is irreparable or missing, meniscal transplantation using donor tissue can restore cushioning and joint stability.

Rehabilitation is a critical component of treatment for knee cartilage injuries, regardless of the method used. Patients undergo a structured program that gradually increases activity levels while ensuring optimal healing. Early stages of rehabilitation focus on reducing swelling and restoring range of motion. Strengthening exercises and weight-bearing activities are introduced as the joint heals, eventually progressing to sports-specific training for athletes.

Full recovery timelines vary depending on the severity of the injury and the type of treatment. For example, nonsurgical treatments may allow patients to return to activities within weeks, while recovery from procedures like ACI or OATS can take several months.