Knee osteoarthritis (gonarthrosis) affects roughly one in three adults after 60 and is one of the main reasons for consultation in sports medicine in Quebec. A well-structured conservative treatment plan delays — and in many cases avoids — total knee replacement. This guide covers the non-surgical options offered by Dr Sébastien Labrecque-Sauvé at Clinique Sport Santé Laurentides (Saint-Sauveur) and Clinique Médecine Sportive Avenir (Laval). For per-act fee details, see our sports medicine pricing page.

Understanding Knee Osteoarthritis (Gonarthrosis)

Knee osteoarthritis is a progressive degradation of the articular cartilage accompanied by changes in the subchondral bone, synovial fluid, and peri-articular structures. It isn't only a disease of "older" people — about one in four adults aged 50 to 65 already show radiological signs, sometimes without symptoms.

Severity is usually graded using the Kellgren-Lawrence scale (grades 0 to 4):

Grade 1 — early osteophytes, minimal joint-space narrowing, often asymptomatic.
Grade 2 — definite osteophytes, moderate narrowing; this is typically the first stage where pain appears with prolonged effort (climbing stairs, long walks).
Grade 3 — marked narrowing, subchondral sclerosis, deformity of the joint contours; pain in daily activities.
Grade 4 — severe narrowing, bulky osteophytes, bone deformity; pain at rest and at night.

The most common symptoms: mechanical pain (with effort, relieved by rest), morning stiffness lasting less than 30 minutes, audible crepitus under the knee, recurrent effusions, and reduced mobility (flexion, extension). The main risk factors are age, excess weight (each extra 5 lb adds roughly twice as much load on the medial compartment per step), a prior meniscal tear or ligament rupture, and repetitive load-bearing activity (running, alpine skiing, hockey, physically demanding jobs).

Osteoarthritis isn't a one-way street to a knee replacement. A properly structured plan can preserve joint function for years, even with significant radiological damage. Context for comparison with total knee replacement (TKR): TKR replaces the worn joint with a metal prosthesis with an excellent success rate, but it is indicated when a properly conducted conservative plan for at least 6 months no longer maintains quality of life.

Medical Assessment with Dr Labrecque-Sauvé

A sports medicine consultation for knee pain typically follows this path:

Structured clinical history — pain location, triggering factors, mechanical profile (stairs, squatting, running), prior trauma, desired activity level.
Targeted physical exam — palpation of the joint lines (meniscal), patellar grind assessment, ligament tests, joint range of motion, quadriceps and hamstring strength, gait analysis.
Diagnostic musculoskeletal ultrasound — performed in-office to visualize surface cartilage, synovial effusion, quad and patellar tendon status, popliteal (Baker's) cysts, and to guide any injection precisely. For the diagnostic role of MSK ultrasound, see our musculoskeletal ultrasound article.
MRI — reserved for cases where ultrasound is insufficient: complex meniscal lesion suspicion, deep cartilage involvement, diagnostic doubt, or failure of the initial treatment. MRI is then prescribed to guide the next step.
Individualized treatment plan — built around grade, pain profile, activity level, and patient preferences. There is no single recipe.

Non-Surgical Options

Conservative treatment typically combines several modalities. They are not mutually exclusive — they complement each other.

Supervised Exercise Program and Integrated Physiotherapy

This is the cornerstone of gonarthrosis management. A structured program improves function, reduces pain, and can delay knee replacement by several years. Dr Labrecque-Sauvé coordinates with physiotherapists to prescribe an individualized plan:

Quadriceps strengthening — closed kinetic chain (squat, leg press), progression over 8 to 12 weeks to achieve functional strength without joint overload.
Hamstring strengthening — closed and semi-closed chain flexion, balanced against the anterior chain.
Hip stabilizers and gluteals — abduction, external rotation, proprioception during walking and running.
Proprioception and neuromuscular control — balance-board work, unstable surfaces.
Joint mobility without overload — gains in flexion and extension via passive and active-assistive mobilizations performed in clinic.

For medical-physio coordination in private practice, see our sports medicine services page.

Weight Loss

Weight loss is the most effective non-surgical intervention for gonarthrosis. Known data: each 5 lb of weight lost reduces the load on the medial compartment by roughly 10 lb per step (a mechanical amplification effect). A 5 to 10% loss of body weight is associated with a clinically meaningful improvement in pain and function. Dr Labrecque-Sauvé supports referral to nutrition and adapted activity according to each patient's profile.

NSAIDs, Topicals, and Acetaminophen

Non-steroidal anti-inflammatory drugs (NSAIDs — ibuprofen, naproxen) remain a first-line pharmacologic option for acute painful episodes, used at the lowest effective dose and for the shortest possible duration. Topical NSAIDs (diclofenac gel) offer a favorable efficacy/side-effect ratio for localized pain. Acetaminophen can complement for patients who do not tolerate NSAIDs. These medications relieve symptoms but do not act on cartilage degradation, and chronic use carries risks (gastric, renal, cardiovascular).

Viscosupplementation (Hyaluronic Acid)

Viscosupplementation involves injecting hyaluronic acid into the joint to restore the viscoelastic properties of the synovial fluid and improve joint lubrication. Indicated mainly in early-to-moderate gonarthrosis (grades 2-3), it targets lubrication rather than regeneration. For details (protocol, number of injections, indications), see our complete guide on knee viscosupplementation.

PRP (Platelet-Rich Plasma)

PRP is a regenerative treatment: the patient's blood is drawn, centrifuged to concentrate the platelets (3 to 7 times the normal blood concentration), then re-injected under ultrasound guidance into the joint or target zone. Platelet growth factors (PDGF, TGF-β, VEGF) stimulate healing of cartilage, meniscus, and peri-articular tissues. For practical details (cost, indications), see our guide on PRP knee price in Quebec, and the PRP injection guide for the full injection protocol.

Positioning relative to knee replacement: PRP suits patients who want to try a regenerative option before considering surgery, or who are not (yet) candidates for a replacement (age, comorbidities, desire to preserve the native joint). It acts slowly (maximum effect between 6 and 12 weeks) but the benefit can last 6 to 12 months, sometimes longer.

Intra-Articular Cortisone

Intra-articular cortisone is the most financially accessible and fastest option to break an inflammatory cycle. It is particularly useful while waiting for regenerative treatment (PRP) or during an acute flare on known osteoarthritis. Important limit: 2 to 3 infiltrations per year maximum — beyond that, there is a risk of cartilage and soft-tissue weakening. For details, see our guide on cortisone infiltration.

Personalized Treatment Plan

Dr Labrecque-Sauvé builds a plan that typically combines several modalities rather than a single option. The most common scenario for symptomatic grade 2-3 gonarthrosis:

Months 1-2 — demystify the diagnosis, initiate the supervised exercise program, optimize weight and lifestyle, prescribe NSAIDs or topicals as needed.
Months 2-3 — viscosupplementation or PRP depending on age, grade, preferences, and budget; cortisone infiltrations to break an acute flare.
Months 4-6 — reassessment: benefit maintained? grade progression? effort tolerance? decision to repeat an injection, intensify the exercise program, or refer to an orthopedic consultation.

Every patient is different: a 50-year-old recreational runner with grade 2 and a 70-year-old retiree with grade 3 have distinct plans. The medical decision integrates grade, age, activity level, weight, comorbidities, and patient preferences.

When Does Knee Replacement Become Indicated?

Total knee replacement (TKR) is a highly effective treatment with excellent long-term success rates. It becomes indicated when:

Pain is refractory to a properly conducted conservative plan for at least 6 months.
Pain disrupts sleep or activities of daily living (walking 200 m, climbing a few steps).
The radiological grade is severe (3-4) with significant functional impairment.
The patient is in health compatible with surgery and post-operative rehabilitation.

Dr Labrecque-Sauvé then refers to an orthopedic consultation for surgical evaluation, while remaining available for subsequent musculoskeletal follow-up. It is important to clarify: a knee replacement is not a mandatory step — it is an option that becomes relevant when non-surgical care is no longer enough. Many patients live very well with moderate gonarthrosis for years thanks to a properly conducted conservative plan.

Would you like to assess your situation? Book a sports medicine appointment at Clinique Sport Santé Laurentides (Saint-Sauveur) or at Clinique Médecine Sportive Avenir (Laval). For a per-act fee overview, see the full pricing page.

FAQ — Knee Osteoarthritis and Non-Surgical Treatment

Can you really avoid total knee replacement?

In many cases, yes — at least for several years. The data show that a properly conducted conservative plan (supervised exercises + physiotherapy + weight loss + targeted injections depending on indication) can significantly delay — sometimes indefinitely, for early-to-moderate grades — the need for replacement. The replacement becomes the choice option when pain becomes refractory and impacts daily activities and sleep.

How long before you see a benefit from PRP in the knee?

Unlike cortisone, which relieves quickly (1-2 weeks), PRP acts slowly. The maximal benefit typically appears between 6 and 12 weeks after the injection, and the effect often lasts 6 to 12 months. A second session may be considered if the benefit is partial after 8 to 12 weeks.

Does early osteoarthritis (grade 1-2) really respond to treatment?

Yes — and that's actually the situation where conservative treatment is most effective. Grade 1-2 responds well to an exercise program, weight loss, and targeted infiltrations (cortisone to break a flare, PRP or viscosupplementation for a lasting effect). The higher the grade at first consultation, the more the absolute benefit from conservative care tends to decrease — which is why early consultation matters.

At what age is PRP no longer indicated?

There is no strict age limit. The indication depends more on radiological grade, residual cartilage quality, comorbidities, and the desire to preserve the native joint. A 75-year-old in good health with grade 3 who wants to avoid surgery may be a good PRP candidate; a 55-year-old with grade 4 and severe functional impairment is probably already a candidate for an orthopedic consultation. The decision is individual.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. The treatment options listed reflect common practice in sports medicine in Quebec and do not replace an individual evaluation. Consult a qualified physician to assess your situation and determine the treatment plan appropriate to your case.

Knee Osteoarthritis (Non-Surgical Treatment): A Quebec Guide