Knee Osteoarthritis Treatment Options

Knee osteoarthritis (OA) is a degenerative joint condition primarily involving the loss of articular cartilage—the smooth, white tissue that protects the ends of the bones where they meet in the joint. Healthy cartilage acts like a cushion, allowing the knee to bend, straighten, and twist with ease. When this cartilage becomes thin or damaged, the bones begin to rub closer together, increasing friction inside the joint and causing pain, swelling, and stiffness.

OA is typically graded using the Kellgren–Lawrence (KL) scale, which classifies severity based on X-ray findings:

• Grade 1: Very early changes; cartilage is beginning to soften, but X-rays are mostly normal. Patients may have occasional soreness, especially after activity.
• Grade 2: Mild narrowing of the joint space and small bone spurs. Symptoms may include intermittent pain and morning stiffness. Many patients first seek medical care at this stage.
• Grade 3: Moderate joint space loss, clear bone spur formation, and more persistent pain. Activities like walking longer distances, climbing stairs, or squatting become more difficult.
• Grade 4: Severe joint space narrowing, large bone spurs, and “bone-on-bone” contact. Pain may occur even at rest, and mobility becomes significantly restricted.

Knowing the severity of your osteoarthritis helps guide treatment options and set expectations for recovery.

Physical therapy (PT) is one of the most powerful and effective treatments for mild to moderate knee osteoarthritis. For many patients, a consistent therapy program significantly reduces pain, improves function, and delays or even prevents the need for surgery.

PT works by strengthening the muscles that support and stabilize the knee, especially the quadriceps (front of the thigh), hamstrings (back of the thigh), gluteal muscles (hips and buttocks), and core. When these muscles function well, they absorb more of the impact and load that would otherwise stress the arthritic joint.

A targeted therapy program typically includes:

• Strengthening exercises for the quadriceps, hamstrings, glutes, and core
• Stretching routines to reduce stiffness and improve flexibility
• Low-impact aerobic conditioning, such as cycling or elliptical use
• Balance training to improve joint stability and reduce falls
• Manual therapy techniques to reduce soft tissue tightness
• Home exercises to maintain progress between therapy sessions

Most patients begin feeling improvement within 6 to 12 weeks when they commit to consistent PT. For many individuals with mild to moderate OA, physical therapy is the foundation of long-term management.

Many patients are interested in natural supplements as part of their osteoarthritis care. The most commonly discussed supplements include glucosamine, chondroitin, and turmeric/curcumin.

Glucosamine and chondroitin are naturally occurring building blocks of cartilage. Some patients report reduced soreness and improved comfort when taking these supplements. While scientific evidence is mixed, pharmaceutical-grade preparations have shown more consistent benefit than typical over-the-counter blends. For patients who wish to try them, Dr. Vega recommends a 6–8 week trial, continuing only if meaningful improvement is noticed.

Turmeric/curcumin has natural anti-inflammatory properties and may reduce day-to-day aches for some individuals. It is safe for most patients but should be used cautiously in those on blood thinners. Like glucosamine and chondroitin, turmeric is best viewed as a supplemental strategy, not a replacement for foundational treatments like therapy, exercise, or weight control.

Oral nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen (Advil) or naproxen (Aleve) are widely used for knee osteoarthritis. These medications reduce inflammation and pain within the joint, often allowing patients to stay active and participate fully in physical therapy.

NSAIDs are best used:

• During flare-ups
• Before physical therapy or exercise
• For short-term symptom relief

They should be taken at the lowest effective dose and avoided in patients with kidney disease, prior stomach ulcers, or certain heart conditions. For many individuals, NSAIDs are an important tool for maintaining mobility and reducing day-to-day discomfort.

When pain persists despite therapy, medications, and supplements, in-office injections may provide significant relief. Several options are available, depending on your symptoms and severity of disease. It is important to understand that all injections are meant to decrease pain and inflammation, but they cannot stop or reverse the underlying cause – cartilage breakdown.

Corticosteroid Injections

Corticosteroid injections reduce inflammation inside the knee and often provide quick pain relief—especially helpful during acute flare-ups. Relief typically lasts from several weeks to a few months. They are useful if pain is interfering with sleep, work, or rehabilitation.

Hyaluronic Acid Injections

Hyaluronic acid (HA) is a gel-like substance that naturally lubricates the knee joint. As cartilage wears down, the knee’s natural HA becomes thinner and less effective. HA injections can supplement this loss, improving lubrication and reducing friction. Many patients with mild to moderate OA experience smoother movement and reduced pain for several months following treatment.

Platelet-Rich Plasma (PRP)

PRP uses your own blood platelets, concentrated and injected into the knee to reduce inflammation and promote healing. PRP is particularly useful for younger patients with early osteoarthritis who want to delay surgery. Some individuals experience longer-lasting relief with PRP compared to corticosteroids or HA.

Combined HA + PRP

Combining hyaluronic acid and PRP can offer the benefits of both—increased lubrication and biologic healing. Some studies suggest the combination may produce longer-lasting relief than either treatment alone.

Choosing the right injection depends on your goals, severity of arthritis, and overall health. Dr. Vega customizes injection plans to maximize comfort and maintain mobility.