- What is the role of the meniscus in the knee?
The meniscus is a fibrocartilaginous structure essential for the stability and protection of the knee. It acts as a shock absorber between the femur and tibia, distributing the load during walking, running, or rotational movements. It also contributes to joint lubrication and cartilage nourishment. When the meniscus functions properly, it allows for smooth and pain-free movement. Its weakening exposes the cartilage to excessive stress. In the long term, this can accelerate the onset of osteoarthritis.
- What is the purpose of articular cartilage?
Articular cartilage covers the bone surfaces inside the knee and allows the bones to glide smoothly against each other without friction. It plays a central role in the fluidity and flexibility of movement. Unlike other tissues, cartilage has neither blood vessels nor nerves, which explains its limited regenerative capacity. As it wears down, the bone gradually becomes exposed. This leads to pain, stiffness, and inflammation. Preserving cartilage is therefore crucial for joint health.
- What is the difference between a meniscus tear and a cartilage tear?
A meniscus tear affects a mobile and flexible structure, often damaged during rotational movements or repetitive strain. Cartilage, on the other hand, wears down gradually over time or following repeated trauma. Meniscal pain is often mechanical, with locking or sensations of discomfort. Cartilage pain is more diffuse and progressive. These two conditions are frequently associated. Distinguishing between them is essential for guiding treatment.
- Do the meniscus and cartilage age naturally?
Yes, like all the body's tissues, the meniscus and cartilage change with age. Cartilage gradually loses its elasticity and thickness. The meniscus becomes more fragile and less resistant to mechanical stress. This aging process is physiological, but it doesn't always cause symptoms. Pain usually appears when these structures can no longer absorb the load. Good joint hygiene can slow this process.
- Is it possible to have an injury without immediate pain?
It is entirely possible to have a meniscus or cartilage tear without any significant pain initially. Some injuries are well tolerated for several months, or even several years. Symptoms often appear gradually, with increased stress or physical activity. Intermittent discomfort may be the first sign. This is why early diagnosis is important. It allows for treatment to be adapted before the condition worsens.
- Why do these lesions limit mobility?
When the meniscus or cartilage is damaged, joint gliding becomes less fluid. The bone surfaces experience increased friction and micro-trauma. This triggers an inflammatory response that causes pain and stiffness. The body then adopts protective mechanisms, limiting certain movements. Over time, the range of motion decreases. Knee mobility can be significantly reduced.
Does being overweight influence cartilage wear?
Being overweight mechanically increases the stress on the knee. Each extra kilogram multiplies the forces transmitted to the cartilage during walking. In the long term, this accelerates its wear and tear. The meniscus is also subjected to greater stress and becomes more fragile. Weight loss can significantly reduce pain and is often a key component of conservative treatment.
Are the injuries always irreversible?
Not all lesions are irreversible, but the capacity for regeneration remains limited. Some meniscal tears can be stabilized or partially heal. Cartilage, on the other hand, regenerates with difficulty. The main objective is therefore to slow the progression and preserve what remains functional. Innovative treatments can improve symptoms. Early intervention significantly changes the prognosis.
- Can damage to the meniscus and cartilage be prevented?
Prevention relies on several key factors. Appropriate physical activity helps strengthen muscles and protect joints. Warm-up and cool-down are essential to minimize the risk of injury. Weight management also plays a major role. Good posture and appropriate sports equipment reduce stress. Finally, paying attention to pain signals helps prevent the condition from worsening.
- When should you consult a specialist?
It is recommended to consult a doctor as soon as persistent pain, swelling, or locking of the knee occurs. Discomfort that persists despite rest is never insignificant. The earlier the diagnosis, the more treatment options are available. Waiting can lead to a worsening of the condition. A specialist will be able to accurately assess the cause of the symptoms and offer a personalized treatment plan.