Chronic or acute joint pain - knee, shoulder, hip, ankle, wrist - is one of the most frequent causes of medical consultation and loss of quality of life among adult Quebecers. Osteoarthritis, tendinopathies, bursitis, meniscal lesions and rotator cuff pathologies are among the most frequently encountered conditions. When oral analgesics, physiotherapy and conservative measures are no longer sufficient to control pain or maintain an acceptable quality of life, joint infiltrations represent a valuable intermediate therapeutic option - effective, minimally invasive and rapidly accessible in private clinics.
Clinique Omicron offers joint infiltrations performed by an orthopedist in several of its Quebec branches, with significantly shorter access times than in the public network - where waiting lists for this type of procedure can stretch from several weeks to several months. This guide outlines the main indications for infiltration, the substances injected, how the procedure works, the expected effects and the questions to ask your doctor before proceeding.
What conditions benefit from joint infiltration?
Joint infiltrations are indicated for a wide range of musculoskeletal pathologies. In the knee, gonarthrosis osteoarthritis is the most frequent indication - pain linked to articular cartilage degradation responds well to corticosteroid infiltration for painful inflammatory flare-ups, and to hyaluronic acid injections - viscosupplementation - for medium-term management. Other frequent indications include knee bursitis, patellar and quadricipital tendinopathies, and painful joint effusions.
On the shoulder, rotator cuff pathologies - tendinopathies, partial tears - subacromial bursitis, retractile capsulitis - frozen shoulder - and acromioclavicular osteoarthritis benefit from targeted infiltrations. At the hip, coxarthrosis, trochanteric bursitis and painful hip syndrome can be treated with infiltration. Other joints - ankle, wrist, fingers, spine - can also be infiltrated, depending on the clinical context. Lateral and medial epicondylitis of the elbow - tennis elbow and golf elbow - and plantar fasciitis are periarticular tendinopathies commonly treated with infiltration.
Corticosteroids versus hyaluronic acid: two complementary approaches
Corticosteroids - cortisone, methylprednisolone, triamcinolone - are the most commonly used agents for joint infiltration. Their mechanism of action is based on a powerful local anti-inflammatory effect: they inhibit the synthesis of prostaglandins and pro-inflammatory cytokines, reducing synovial inflammation, pain and joint swelling. Relief is generally rapid - often noticeable within 48 to 72 hours - and can last from several weeks to several months, depending on the severity of the condition and individual response. Corticosteroid infiltrations are particularly effective for acute inflammatory flare-ups and bursitis.
Hyaluronic acid - viscosupplementation - is a substance naturally present in joint synovial fluid, where it acts as a lubricant and shock absorber. In osteoarthritis, the concentration and quality of synovial hyaluronic acid gradually deteriorate. Intra-articular injection of exogenous hyaluronic acid aims to restore the viscoelastic properties of synovial fluid and exert analgesic and potentially chondroprotective effects. The benefit is less immediate than that of corticosteroids - it builds up gradually over two to five weeks - but can last longer, from six months to a year. Viscosupplementation is particularly indicated for moderate to severe knee osteoarthritis, as an alternative or complement to corticosteroids.
Clinical procedure for joint infiltration
Joint infiltration is a medical procedure performed on an outpatient basis. The patient is placed in a position adapted to the joint concerned - lying down, sitting up or lying on one side, depending on the location. The injection site is carefully disinfected. A local anesthetic of lidocaine may be administered beforehand to minimize discomfort, particularly for deep joints such as the hip. The orthopaedic surgeon guides the needle to the joint space or target site - burse, tendon sheath - using precise anatomical landmarks, or under ultrasound guidance for clinically inaccessible joints or in cases of variable anatomical position.
Ultrasound guidance - injection under ultrasound - improves needle positioning accuracy and reduces the risk of extrarticular injection, particularly for the hip, shoulder and small joints. The chosen substance - corticosteroid alone, a mixture of local anesthetic and corticosteroid, or hyaluronic acid - is injected slowly. The procedure generally takes five to fifteen minutes, depending on complexity. Slight joint pressure or distension may be felt during the injection. After the procedure, relative rest of the joint for 24 to 48 hours is recommended. A slight exacerbation of pain - post-infiltration flare - is possible in the first few hours, particularly with crystalline corticosteroids, and resolves spontaneously.
Frequently asked questions about joint infiltration in Quebec
Are joint infiltrations covered by RAMQ?
Joint infiltrations performed by a participating physician as part of a documented medical indication are covered by the RAMQ - both the consultation and the infiltration procedure itself are covered. The cost of the drugs injected - corticosteroids and hyaluronic acid - may be billed separately, depending on the context. In the public network, access to this service generally requires referral by a family doctor, and can involve significant waiting times. In private clinics, access is much faster - although some fees may apply, depending on the clinic's billing arrangements. Private group insurance often covers medical procedures performed in private clinics, including joint infiltrations.
How many infiltrations can a single joint receive per year?
The frequency of joint infiltrations is limited to avoid the side effects associated with repeated corticosteroid injections - notably the progressive weakening of periarticular tendinous and cartilaginous structures. The general recommendation is not to exceed three to four corticosteroid infiltrations in the same joint per year, spaced at least six weeks apart. For hyaluronic acid, protocols vary from product to product - one to three consecutive weekly injections for some preparations, a single injection for others. The orthopedist assesses the benefit-risk ratio on an individual basis, and recommends a surgical solution - joint prosthesis - if repeated infiltrations no longer maintain adequate pain control.
Are joint infiltrations painful?
The level of pain experienced during joint infiltration varies considerably according to the joint concerned, the technique used and individual sensitivity. Infiltration of the knee - an accessible, superficial joint - is generally painless. Infiltration of the hip - a deep joint - may be more uncomfortable without ultrasound guidance. Prior injection of a local cutaneous anesthetic significantly reduces pain at the time of puncture. The vast majority of patients describe the infiltration as bearable, sometimes with a slight sensation of pressure or burning when the product is injected. Anxious anticipation is often worse than the procedure itself. Post-infiltration flare - increased pain in the hours following injection - is effectively managed with paracetamol and local ice.
Can joint infiltration replace surgery?
Joint infiltrations are a symptomatic treatment that relieves pain and improves mobility, but they do not correct underlying structural lesions - cartilage degradation, complete tendon tears, mechanical meniscus damage. They are part of an overall therapeutic strategy that includes physiotherapy, weight management, adapted physical activity and, if necessary, surgery. For advanced osteoarthritis with severe joint destruction, total joint prosthesis remains the most effective definitive solution - infiltrations can be used to delay the onset of osteoarthritis or optimize quality of life while awaiting surgery. In the case of certain partial tendon injuries, infiltrations as a complement to rehabilitation can help avoid surgery. The orthopedist will make a personalized recommendation based on the patient's stage of injury, age, activity level and functional goals.
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