Knee Osteoarthritis Treatment — Without Surgery

Bone-on-Bone Knee Pain — Without Replacement Surgery

If your X-rays show bone-on-bone changes and your orthopedist has begun the conversation about knee replacement, low-dose radiation therapy is worth understanding before the procedure goes on the calendar. LDRT treats the inflammatory environment in the joint that produces day-to-day pain — the swelling, the stiffness, the deep ache that limits walking and stairs — regardless of how worn the cartilage itself has become. Roughly seven in ten patients in published series report meaningful pain relief, including patients with advanced, late-stage osteoarthritis on imaging.

Knee Replacement Alternative for Severe Arthritis

Knee replacement is a remarkable operation when it's the right answer, but it is not the only path for severe knee osteoarthritis. Patients in their seventies and eighties who are not ready for major surgery, patients with cardiac or pulmonary comorbidities that elevate surgical risk, and patients who simply want a less invasive option first are exactly the candidates LDRT is designed for. Treatment is outpatient, painless, and produces no surgical wound — and it does not affect your eligibility for replacement surgery later if you decide that's the right step.

If You're Here, You've Probably Tried Everything

If you have knee osteoarthritis and you've already tried cortisone injections, physical therapy, anti-inflammatories, or hyaluronic acid shots — and you're still in pain — you're in a difficult position. The next step your orthopedic surgeon will likely recommend is knee replacement. Many patients aren't ready for that, can't have surgery for medical reasons, or simply want another option first.

Low-dose radiation therapy is that option.

Knee Pain After Cortisone Shot Failed

Cortisone injections are one of the most common first-line treatments for knee osteoarthritis pain — and one of the most common to lose effect over time. Many patients arrive at Heelex describing the same arc: the first cortisone shot helped meaningfully for months; the second helped a little less; by the third or fourth, the relief barely lasted weeks. Repeat cortisone injections can also accelerate cartilage loss with chronic use. If you have reached the point where cortisone has run out of room and you are not ready for surgery, LDRT is the next evidence-supported non-surgical step.

What Is Low-Dose Radiation Therapy?

Low-dose radiation therapy (LDRT) uses very small doses of X-rays — roughly 1/10th to 1/25th of the dose used to treat cancer — to reduce the inflammation that drives osteoarthritis pain. The treatment is delivered with a specialized X-ray machine and targets only the affected joint.

The mechanism is well-characterized in the radiobiology literature: at these doses, the radiation modulates inflammatory cytokines and the macrophage population inside the synovium — quieting the chemical signals that drive swelling, stiffness, and pain. It does not affect cartilage, bone, or surrounding tissue, and there are no post-treatment activity restrictions.

LDRT has been used routinely in Germany for decades. It is increasingly offered at U.S. academic centers including Cleveland Clinic and Loyola Medicine.

Heelex Medical opened in 2020 as the first clinic in the United States dedicated exclusively to low-dose radiation therapy. The Knoxville, Tennessee location is one of two Heelex clinics offering this treatment.

Is This Right for You?

LDRT may be a good fit if:

• You've been diagnosed with knee osteoarthritis
• You've tried at least one conservative treatment — physical therapy, NSAIDs, cortisone injections, or hyaluronic acid — without lasting relief
• You want to avoid or delay knee replacement surgery
• You can't have surgery due to age, medical risk, or other factors

LDRT is not appropriate for:

• Active joint infection
• Rheumatoid arthritis (different disease, different treatment)
• A knee that already has a joint replacement
• Pregnancy

A consultation is the only way to determine whether LDRT is right for your specific situation.

What to Expect

1. Consultation — A 30-minute visit with our team. We review your imaging, history, and prior treatments. No commitment.
2. Simulation — A brief planning session where we image the knee and design the treatment field.
3. Treatment — 6 to 8 weekday sessions. Each session takes about 15 minutes total — roughly two minutes of actual treatment time. You lie still on a table; you feel nothing.
4. Recovery — None. You drive yourself home and return to all normal activities immediately.
5. Follow-up — We check in at 6 weeks and 3 months. Most patients begin noticing relief between weeks 6 and 12.

Insurance

Low-dose radiation therapy for osteoarthritis is covered by Medicare and most major insurance plans, including Aetna, BCBS, Cigna, Humana, Tricare, UnitedHealthcare, and Veterans Choice. Our office handles all insurance pre-authorization. View the full list of accepted insurance.

Common Questions

Does it hurt? No. You feel nothing during treatment. No needle, no injection, no anesthesia.

Are there side effects? Rare. Some patients notice mild, temporary skin redness. No systemic side effects.

Will it cause cancer? The dose used for osteoarthritis is approximately 1/10th to 1/25th of the dose used to treat cancer. Long-term studies in Germany — where LDRT has been used for decades — show no increased cancer risk. We do not treat patients under 40 except in specific circumstances.

How quickly will I feel better? Most patients begin noticing relief between 6 and 12 weeks after their final session. About 70% report meaningful improvement.

How long does relief last? Typically 12 to 24 months. A second course can be given if symptoms return.

Do I need a referral? No. You can call us directly. If you have an orthopedic surgeon, primary care physician, or rheumatologist, we coordinate with them.

What if it doesn't work for me? LDRT is not a guarantee. About 20–30% of patients see limited or no benefit. We will tell you this honestly during your consultation. The treatment does not interfere with future options including surgery.

Chronic Knee Pain Treatment in Knoxville, TN

Heelex is based in Knoxville, TN and treats patients with chronic knee pain across East Tennessee and the broader Knoxville metro — including Bearden, West Knoxville, Farragut, Powell, Karns, Lenoir City, Oak Ridge, Maryville, Alcoa, Sevierville, Pigeon Forge. If the standard playbook has run out and you are looking for non-surgical knee arthritis treatment that is supported by decades of European clinical practice and a growing U.S. evidence base, an evaluation visit is the next step.

Knee Arthritis Specialist

Heelex is a knee arthritis specialty clinic — LDRT for benign musculoskeletal disease is the core of what we do, and knee osteoarthritis is among the conditions we treat most often. We are not a general orthopedic office where this protocol is offered occasionally. The depth of experience that comes with high case volume is the difference between a confident treatment plan and a guess.

Take the Next Step

If knee osteoarthritis is limiting your life and the standard treatments haven't worked, a 30-minute consultation answers whether LDRT is right for you. No cost. No commitment.