Do PRP Injections for Knee Pain Work?

Yes, PRP (Platelet-Rich Plasma) injections relieve knee pain by delivering concentrated platelets directly into the affected knee joint. These platelets, taken from your own blood, release growth factors that support healing in damaged tissue. Other than that, these injections regenerate cartilage in arthritic areas and improve joint lubrication. PRP also helps reduce stiffness, ease movement, and support long-term joint function.

At Total Orthopedics & Sports Medicine, our specialists use platelet-rich plasma (PRP) injections to treat knee osteoarthritis under ultrasound guidance. Depending on your arthritis index (a tool that measures pain, stiffness, and physical function), we will also create a treatment plan that may include single or multiple PRP injections. Call us at 855-321-6784 to improve mobility with trusted PRP therapy.

How Effective Are PRP Injections for Knee Pain?

PRP injections are highly effective for reducing knee pain caused by mild to moderate knee osteoarthritis and soft tissue damage. According to a randomized controlled trial on NCBI, 517 patients with chronic knee osteoarthritis received PRP therapy. After 12 months, 54.1% of patients showed significant improvements in pain, daily function, and overall knee-related quality of life.

Moreover, PRP injections restore cellular activity in the joint, which helps slow down the cartilage damage and improves joint stability. This stability leads to better joint support during movement, especially in weight-bearing activities like walking, climbing stairs, or exercising. Along with stability, PRP injections improve internal knee functions, including:

• Improved shock absorption in the knee joint due to healthier cartilage structure
• Better synovial fluid quality, which enhances joint lubrication and nutrient flow
• Decreased joint warmth and swelling by controlling inflammatory cell activity
• Support for microvascular repair, which improves blood flow in damaged tissues

What Are the Different Types of Platelet-Rich Plasma Injections?

There are four main types of platelet-rich plasma injections, including leukocyte-rich PRP, leukocyte-poor PRP, pure PRP, and platelet-rich fibrin matrix (PRFM). Each type contains a different mix of concentrated platelets, white blood cells, and plasma. Here’s how each type helps reduce knee pain, improve tissue repair, and support healing:

Leukocyte-Rich PRP (LR-PRP)

Leukocyte-rich PRP contains a high concentration of white blood cells and platelets drawn from your own blood. Doctors often recommend this type for soft tissue injuries like ligament sprains or knee tendinitis. It briefly increases inflammation, which activates your body’s natural healing process. As a result, this rich plasma helps regenerate cartilage, support tissue repair, and reduce knee pain.

Leukocyte-Poor PRP (LP-PRP)

Leukocyte-poor PRP contains a high concentration of platelets but very few white blood cells. By limiting white blood cells, these injections avoid triggering an aggressive immune response. It also supports cartilage repair and improves mobility without increasing joint irritation.

According to PubMed, researchers studied 30 Japanese patients with mild to moderate osteoarthritis. They found that three LP-PRP intra-articular injections led to statistically significant improvements in pain and joint function over 24 weeks. Additionally, 73.3% of patients reported at least a 50% reduction in pain on the Visual Analog Scale (VAS), highlighting the clinical impact of this treatment.

Pure PRP

Pure PRP contains a high platelet count with minimal white blood cells and blood plasma. This focused formula supports precise tissue healing with reduced inflammation. Under ultrasound guidance, doctors inject this pure PRP directly into the joint, where it promotes cartilage regeneration. Other than targeted healing, pure PRP offers several other benefits, such as:

• Minimizes the risk of post-injection swelling because of low white blood cells
• Stimulates chondrocytes, the cells responsible for maintaining healthy cartilage in the knee joint
• Reduces catabolic enzyme activity, which helps prevent further cartilage breakdown

Platelet-Rich Fibrin Matrix (PRFM)

PRFM is a thicker, gel-like platelet-rich plasma (PRP) that releases growth factors slowly and consistently over time. This continuous release supports healing in damaged joint tissues, especially where long-term repair is needed. PRFM is a safe and effective treatment for patients with advanced knee osteoarthritis who may not respond well to basic PRP injections.

If you’re dealing with knee pain or osteoarthritis, our surgeons offer advanced PRP treatments to help restore joint function. We use well-established methods to reduce inflammation, promote cartilage repair, and improve movement. Contact us to explore which platelet-rich plasma therapy is suitable for you.

How Many PRP Injections Do You Need for Knee Osteoarthritis?

You typically need three PRP injections for moderate knee osteoarthritis and four to six for severe osteoarthritis. These are generally injected at intervals of 1 to 2 weeks to allow proper healing between sessions. Although a single platelet-rich plasma injection may offer brief relief, multiple injections work more effectively by gradually reducing pain and restoring joint function.

This approach is supported by a study conducted in the orthopaedic journal of cartilage & joint preservation, which found that patients who received three injections had significantly better outcomes than those who received a single PRP injection. Their VAS pain scores dropped from 7.3 to 3.7, and WOMAC scores improved from 67.0 to 45.4 at six months (after the third injection).

Who Is an Ideal Candidate for PRP Injections?

PRP injections work best for individuals with knee osteoarthritis, musculoskeletal injuries, tendon issues, or ligament sprains that haven’t improved despite conservative treatments. Moreover, our board-certified physician, Dr. Brett Spain, may recommend PRP injections for patients who want to restore mobility and promote tissue repair without relying on medications or orthopedic surgery.

However, PRP may not be suitable for people with:

• Severe joint damage that may require surgical intervention
• Bleeding disorders that increase the risk of complications
• Active infections in or around the injection site
• Certain autoimmune conditions (lupus, rheumatoid arthritis, or scleroderma)
• Poor overall platelet function or very low platelet counts

How Long Do the Effects of Steroid Injections Last for Knee Pain?

Steroid injections can ease pain for six weeks to six months in mild to moderate knee osteoarthritis. However, in more advanced cases, severe joint inflammation, articular cartilage loss, or structural degeneration, the pain relief may only last a few weeks to two months. Although these injections reduce pain quickly, they do not repair underlying joint damage. Other than that, repeated use of steroid injections may reduce their effectiveness, especially in joints with advanced cartilage degeneration.

How Can You Maximize the Benefits of PRP Injections?

To maximize the benefits of PRP injections, do light exercise like walking, eat more leafy greens, and add more B vitamins to your diet. Also, drink plenty of water, avoid smoking and alcohol while your body heals. Besides that, do not take non-steroidal anti-inflammatory medications, as they can affect the platelets’ ability to support tissue healing. To maximize the benefits of your PRP injection, doctors may also suggest:

• Getting at least 7–8 hours of sleep to enhance cellular repair
• Using ice packs to ease soreness or mild swelling
• Maintaining a healthy weight
• Using braces or supportive footwear

If you’re thinking about PRP injections for joint pain, our team can help you get better results by guiding you through recovery. We’ll help you manage your activity, diet, and lifestyle adjustments to support your body’s natural healing. Contact us to begin a treatment plan that supports long-term joint function.

Are there Any Side Effects of PRP Injections for Knee Arthritis?

Common side effects of PRP injections for knee arthritis include joint pain, swelling, stiffness, and mild bruising. Some people may also experience warmth, redness, or increased soreness at the injection site. In rare cases, there may be a temporary flare-up of inflammation or a low risk of infection. These effects usually resolve within a few days.

Total Orthopedics & Sports Medicine Offers Effective PRP Treatments For Knee Pain — Visit Now!

Ongoing pain from knee osteoarthritis, injury, or inflammation can severely limit your daily movement and comfort. When left untreated, it may lead to joint stiffness, reduced strength, and more serious joint damage over time. You may also struggle with walking, bending, or lifting, and experience frequent flare-ups or swelling. In some cases, untreated joint problems can worsen over time, and you may need surgery to restore function.

That’s why our team at Total Orthopedics & Sports Medicine offers advanced PRP therapy for lasting pain relief. We use ultrasound-guided injections to reduce pain, improve mobility, and support cartilage healing. Our doctors create a treatment plan according to your arthritis stage, joint health, and lifestyle goals. Call us today at 855-321-6784 or visit our clinic at 1789 Sheepshead Bay Rd, Brooklyn, NY 11235, for advanced knee OA treatment.

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