What Is Medial Compartment Osteoarthritis?
The medial compartment is the side of your knee closest to the other knee. The lateral compartment is on the other side of your knee. Osteoarthritis most often shows up first in the medial compartment of your knee.
Symptoms of Medial Compartment Osteoarthritis
Typical symptoms like pain, swelling, stiffness, and loss of motion often get worse over time.
The pain may be the most uncomfortable and stiff in the morning when you wake up. You might not be able to move your knee freely, and you may notice a scraping or crunching feeling when you do. Doctors call this crepitus.
If it’s only in your medial compartment, the pain could center on the inside part of your knee. But the discomfort may be more general if there's a tear of something called the meniscus (a piece of tough, rubbery cartilage between your shin and thigh bones). A breakdown of other tissue in your medial compartment can cause general pain, too.
Causes of Medial Compartment Osteoarthritis
Normal wear and tear is a big reason you get osteoarthritis, especially after age 50. But other things can cause it or make it worse, like:
- An injury
- Constant lifting, jarring, or bending
Sports with repeated motions on your knee like jogging, basketball, and tennis are examples of things that bring those constant movements.
Some injuries that can happen to your medial compartment include:
- Damage to the meniscus
- Looseness in the ligaments that hold your knee together
- Overstress to your knee, maybe from being overweight
- Your knee bones don’t line up correctly
- Fracture of the bones in your knee
Diagnosis of Medial Compartment Osteoarthritis
Treatment for Medial Compartment Osteoarthritis
There are a number of things your doctor can suggest to help you manage osteoarthritis in your knees, including:
- Medication for pain and swelling, like nonsteroidal anti-inflammatories (NSAIDs)
- A knee brace to ease the load on the inside of your knee
- Physical therapy
- Ice and heat therapy
- Viscosupplementation, a procedure where your doctor injects a liquid called hyaluronic acid into your knee to ease pain and make it easier for you to make some movements
In some cases, surgery might be an option. Possible procedures include:
Knee cartilage transplant. A surgeon takes healthy cartilage from another part of your joint and replaces your damaged cartilage with it.
Total knee replacement. Also known as total knee arthroplasty, this is a replacement of all or part of the knee joint -- including bone and cartilage.
Unicompartmental knee arthroplasty. This is replacement of only the medial side of your knee.
Prevention of Medial Compartment Osteoarthritis
Lose just 10 pounds and you’ll take as much as 40 pounds of force off your knees. That’s 40 less pounds of wear and tear on your knees every day, which could make a big difference over time.
It also helps to keep moving. Exercise seems to help keep your knees healthy, as long as you don’t do the same motion too much or overstress a joint that’s already injured.