Facet Joints Explained: How They Affect Your Spine Health
You bend down to tie your shoe, and a sharp ache shoots through your lower back. Maybe you blame it on sleeping awkwardly, or sitting too long at your desk through another Canadian winter. But when that nagging pain keeps returning — especially when you lean backward or twist — the culprit might be something you’ve never heard of: your facet joints. These small but critical structures guide nearly every movement your spine makes, and when they wear down or become inflamed, they can cause serious discomfort. At our clinic, we see Canadians every week who’ve spent months treating the wrong source of their back pain. Understanding facet joints is the first step toward getting the right diagnosis and the right care.
What Are Facet Joints?
Facet joints are the small joints located at the back of each vertebra that connect one spinal bone to the next. They’re classified as synovial joints, which means they’re lined with cartilage and enclosed in a capsule filled with lubricating fluid — similar to your knee or knuckle joints. You may also hear them called zygapophysial joints, a term derived from the Greek words for “arch” and “growth,” because they sit on the bony arches of the vertebrae. Together with the discs in front, facet joints allow your spine to move smoothly while keeping it stable.
Anatomy of Facet Joints
Each vertebra has two pairs of facet joints — one on the left and one on the right — forming a chain that runs the entire length of your spine. Each joint has a smooth cartilage surface, a synovial membrane that produces fluid, and a capsule of ligaments that holds everything together. Because they’re paired, the facet joints work as a team: when you twist or bend, one side opens while the other closes, guiding the motion and preventing excessive movement. This design is elegant, but it also means that any wear or injury on one side can throw off the entire segment.
How Facet Joints Enable Movement
Think of your facet joints as the hinges and guides of your spine. They allow you to:
- Bend forward and backward (flexion and extension)
- Twist side to side (rotation)
- Lean left and right (lateral bending)
- Maintain an upright posture against gravity
They also limit how far you can move, protecting your spinal cord and nerves from injury. Without healthy facet joints, even simple tasks like reaching for a grocery bag or turning to check your blind spot while driving on a Canadian highway can become painful.
Common Facet Joint Problems
Because facet joints are in constant motion, they’re vulnerable to wear and tear. Over time, the cartilage can thin, the joint capsule can become inflamed, and bone spurs can develop. Facet joint pain is a leading cause of chronic low back pain in Canada, and it’s especially common in adults over 40 — though we also see younger patients whose jobs or sports put repetitive stress on their spines.
Facet Joint Osteoarthritis
Facet joint osteoarthritis is the age-related breakdown of the cartilage inside these joints. As the cartilage wears away, bone rubs against bone, causing pain, stiffness, and reduced mobility. It often develops alongside degenerative disc disease, since a worn disc changes how weight is distributed across the facet joints. In Canada, osteoarthritis of the spine affects a significant portion of adults over 50, and it’s a frequent reason for visits to family doctors and physiotherapists.
Facet Joint Syndrome and Referred Pain
Facet joint syndrome describes pain that originates in the facet joints but is felt elsewhere — often in the buttocks, hips, or thighs. This is called referred pain, and it can make diagnosis tricky. Unlike a herniated disc, which typically causes sharp, shooting pain down the leg, facet joint pain tends to be a dull, aching pain that worsens with extension or rotation. Many patients describe it as a deep soreness they can’t quite pinpoint. That’s why we always consider facet joints when someone comes in with persistent low back pain that doesn’t fit the classic disc pattern.
Diagnosing Facet Joint Pain
Getting the right diagnosis is essential, because facet joint pain doesn’t respond to the same treatments as disc-related pain. In Canada, healthcare providers typically use a combination of history, physical examination, imaging, and — when needed — diagnostic injections to confirm the source.
Physical Examination and History
We start by asking detailed questions: When did the pain begin? Does it get worse when you lean backward or twist? Is it better when you sit or bend forward? We then perform a physical exam, checking your range of motion, testing for tenderness over the facet joints, and assessing your nerve function. A pattern of pain that worsens with extension and rotation, without neurological deficits, often points toward the facet joints.
Imaging and Diagnostic Injections
X-rays can show arthritis, bone spurs, and joint space narrowing. MRI and CT scans give us a more detailed view of the cartilage, joint capsules, and surrounding structures. However, imaging alone can’t always confirm that facet joints are the pain source — many people have arthritis on scans but no pain. That’s why diagnostic facet joint injections are commonly used in Canadian pain clinics. During this procedure, a small amount of local anesthetic is injected into the suspected joint. If the pain disappears temporarily, we’ve found the culprit. This technique is considered the gold standard for confirming facet joint pain.
Treatment Options for Facet Joint Pain
Once we’ve confirmed that facet joints are causing your pain, we build a treatment plan that matches your symptoms, lifestyle, and goals. Most patients start with conservative care and only consider more advanced options if those measures don’t provide enough relief.
Conservative Management
Physiotherapy is the foundation of facet joint treatment. A skilled physiotherapist can teach you exercises to strengthen your core, improve flexibility, and correct posture — all of which reduce strain on the facet joints. Medications such as nonsteroidal anti-inflammatory drugs (NSAIDs) can help manage pain and inflammation in the short term. We also recommend activity modification, heat or ice therapy, and, in some cases, chiropractic care or massage therapy. For many Canadians, these approaches provide meaningful relief without the need for procedures.
Interventional Procedures
When conservative care isn’t enough, interventional options can target the pain directly. These include:
- Facet joint steroid injections — deliver anti-inflammatory medication directly into the joint for longer-lasting relief.
- Medial branch blocks — numb the small nerves that carry pain signals from the facet joints.
- Radiofrequency ablation — a minimally invasive procedure that uses heat to disable the nerves transmitting facet joint pain. Relief can last from six months to over a year.
Radiofrequency ablation is a minimally invasive procedure for facet joint pain, and it’s performed in many Canadian pain clinics on an outpatient basis. Most patients return to normal activities within a day or two.
Surgical Interventions and Implants
For severe cases where conservative and interventional treatments fail, surgery may be considered. Spinal fusion is the most common surgical option for facet joint-related instability or advanced arthritis. During fusion, the surgeon stabilizes the affected vertebrae using hardware such as rods, screws, and interbody cages. Spinal fusion implants from brands like Medtronic and Stryker are available in Canada, and they’ve helped thousands of patients regain stability and reduce pain. We always discuss the risks and benefits carefully, because surgery is a significant step and not everyone is a candidate.
Preventing Facet Joint Degeneration
While we can’t stop aging, we can slow the wear on our facet joints. Small, consistent habits make a big difference over decades.
Ergonomics for Canadians
Many Canadians spend long hours sitting — at desks, in cars, or on couches during long winters. Poor ergonomics puts extra pressure on the lower back. We recommend:
- Setting your chair height so your feet rest flat on the floor
- Keeping your screen at eye level to avoid forward head posture
- Using a lumbar support cushion to maintain the natural curve of your spine
- Taking a standing or walking break every 30 to 45 minutes
If you work from home, don’t overlook your setup. A kitchen table and a dining chair aren’t designed for eight-hour workdays.
Exercise and Weight Management
Maintaining a healthy weight reduces the load on your facet joints every time you move. Regular exercise — especially low-impact activities like swimming, cycling, walking, and yoga — keeps the joints lubricated and the surrounding muscles strong. We suggest aiming for at least 150 minutes of moderate activity per week, plus two sessions of strength training. If you’re new to exercise, start slowly and consider working with a physiotherapist who understands spine health.
FAQ
Are facet joints the same as zygapophysial joints?
Yes. Facet joints are also known as zygapophysial joints. The terms are interchangeable, though “facet joints” is more commonly used in everyday conversation.
How common is facet joint pain in Canada?
Facet joint pain is a leading cause of chronic low back pain in Canada. Studies suggest it accounts for roughly 15% to 45% of chronic low back pain cases, depending on the population studied.
What is a diagnostic facet joint injection?
It’s a procedure where a small amount of local anesthetic is injected into a facet joint to see if it temporarily relieves your pain. Diagnostic facet joint injections are commonly used in Canadian pain clinics to confirm the source of back pain.
Is radiofrequency ablation safe?
Radiofrequency ablation is a minimally invasive procedure for facet joint pain and is generally considered safe when performed by an experienced clinician. Side effects are usually mild and temporary, such as soreness at the injection site.
Are Medtronic and Stryker implants available in Canada?
Yes. Spinal fusion implants from brands like Medtronic and Stryker are available in Canada and are used in hospitals and surgical centres across the country.
Understanding your facet joints gives you the power to ask better questions, seek the right diagnosis, and explore treatment options — from physiotherapy to advanced implants — that can restore your quality of life. If back pain is holding you back, don’t ignore it. Talk to a healthcare provider, get a proper assessment, and take the first step toward better spine health.