Knee Osteoarthritis Treatment
What Is Knee Osteoarthritis?
Knee osteoarthritis is a progressive joint disease in which the cartilage covering the joint surfaces gradually thins and the joint as a whole becomes affected. The process is not limited to cartilage: hardening and cyst formation in the bone underneath, bony spurs at the joint margins (osteophytes), inflammation of the joint lining and weakness in the surrounding muscles all progress together. Osteoarthritis is not a reversible disease. With the right treatment plan, however, pain can be reduced, function preserved and the need for surgery delayed.
How Is the Treatment Plan Decided?
There is no single standard treatment for knee osteoarthritis. The plan is built by weighing the severity of symptoms, which compartment is affected (inner, outer or the kneecap compartment), the alignment of the leg, range of motion, the stage seen on X-ray, and the patient's age, weight, occupation and expectations. Treatment usually advances in steps: lifestyle measures and exercise form the base, medication and — where appropriate — injections are added, and surgery comes into consideration when these steps prove insufficient. An advanced stage on X-ray does not by itself decide for surgery; what matters most is the patient's pain and the limitation in daily life.
Exercise and Physiotherapy
Exercise is the best-supported component of knee osteoarthritis treatment and is recommended at every stage. Strengthening the quadriceps at the front of the thigh and the muscles around the hip balances the load passing through the joint, while range-of-motion and flexibility work reduces stiffness. Low-impact aerobic activity such as walking, cycling and pool-based exercise builds endurance without provoking pain. Avoiding movement altogether because of pain accelerates muscle loss and makes the picture worse, so the programme is maintained with graded loading that keeps pain within a tolerable range.
Weight Management and Lifestyle Changes
Excess weight increases the load carried by the knee and plays a role both in the development and in the progression of osteoarthritis. Losing weight is one of the most effective ways to reduce pain and improve function, and its effect is greater still when combined with exercise. In daily life, reducing prolonged squatting, kneeling work and stair loading, choosing suitable footwear and using a walking stick where needed all ease symptoms. Stopping smoking and maintaining general fitness also improve outcomes if surgery later becomes necessary.
Medication
Medication is used to control pain and inflammatory flares; it does not halt the course of the disease. Painkillers and anti-inflammatory drugs (NSAIDs) can be taken by mouth or applied as a gel, and the topical form may be preferred in people at risk of stomach or kidney side effects. The dose and duration must be set by a doctor, taking account of other conditions and medications. Evidence for the benefit of supplements such as glucosamine and chondroitin is inconsistent, and they do not replace core treatment.
Injections into the Joint
A corticosteroid injection can give short-term relief during an inflammatory flare with marked swelling, but the effect is temporary and frequent repetition is not appropriate. The benefit of hyaluronic acid injections varies from patient to patient and guidelines differ on their use. Platelet-rich plasma (PRP) and stem cell-based applications continue to be studied; there is no proof that these methods rebuild cartilage, and they are not part of routine care. The decision to inject should follow an individual assessment in which expectations are discussed openly.
The Role and Limits of Arthroscopy
Knee arthroscopy is not a suitable treatment for widespread knee osteoarthritis. Arthroscopic procedures aimed only at cleaning or washing out the joint surface have been shown not to provide lasting benefit beyond non-surgical treatment for osteoarthritic pain. In a knee with osteoarthritis, arthroscopy is considered only in selected situations: when there is a genuine mechanical block that has not responded to non-surgical treatment, such as a loose body or a displaced flap of meniscus locking the joint. Making this distinction matters, because it avoids an unnecessary operation.
Osteotomy: Redistributing the Load
An osteotomy is an operation in which a controlled cut in the shin bone or thigh bone corrects the alignment of the leg and shifts the load away from the worn compartment towards a healthier one. It is usually considered in younger, active patients with involvement of a single compartment, clear malalignment, well-preserved range of motion and intact ligaments. Its aim is to reduce pain and to delay the need for a joint replacement. It is not a suitable option in widespread osteoarthritis, in older patients, or in knees with marked loss of motion.
Who Is Cartilage Repair Suitable For?
Cartilage repair and transplantation methods were developed for focal cartilage lesions affecting a limited area within an otherwise healthy joint. They are not a suitable option in widespread knee osteoarthritis, because a large part of the opposing joint surfaces is already affected and the repaired area would continue to face the same load. In a younger patient with an isolated cartilage defect that is expected to progress towards osteoarthritis, and where alignment, meniscus and ligament status are favourable, these methods are assessed as a separate question.
Joint Replacement: Partial and Total Knee Replacement
Joint replacement, in which the worn joint surfaces are resurfaced, comes into consideration for patients who have not responded to non-surgical treatment, whose pain persists at rest and at night, and whose walking distance and daily life are markedly limited. In knees where only one compartment is involved, the ligaments are intact and alignment can be corrected, a partial (unicompartmental) replacement may be an option; where more than one compartment is affected, a total knee replacement is performed. The decision is made together with the patient, based on the level pain and loss of function have reached rather than on X-ray findings alone. The risks, expected gains and the limits of implant longevity should all be discussed in detail before surgery.
Recovery and Rehabilitation
Recovery varies markedly with the method used. With non-surgical treatment, improvement is felt gradually over weeks and maintaining the gain depends on continuing to exercise. After surgery, the early phase focuses on controlling swelling, regaining range of motion early and following a weight-bearing programme set by the procedure: weight-bearing may be restricted for longer after an osteotomy or cartilage repair, whereas early walking is encouraged after a joint replacement. Quadriceps strengthening sits at the centre of rehabilitation on every pathway. Progression is planned around the motion, strength and function criteria that have actually been reached rather than around a fixed calendar.
When Should You See a Doctor?
Knee pain that does not settle within weeks and that limits everyday activities such as walking and using stairs, along with recurrent swelling, morning stiffness or increasing bowing of the knee, should be assessed. Sudden locking, giving way or an inability to bear weight suggests a mechanical problem and should be investigated without delay. A knee that becomes hot, red and swollen with a fever requires urgent assessment for joint infection. You can find detailed information on other knee problems and contact Assoc. Prof. Serkan Sürücü for an assessment.