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Knee Braces

The use of knee braces in sports medicine is a controversial topic. Knee braces are used for a wide variety of problems and conditions. But do knee braces help?

There are two basic types of knee braces:

• Functional Knee Braces
  Functional knee braces are designed to substitute for damaged ligaments. For example, a patient who sustains an ACL tear may be offered a knee brace to wear in efforts to allow certain activities without surgery.

• Prophylactic Knee Braces
  Prophylactic knee braces are used to prevent knee injuries. Prophylactic knee braces are worn by athletes who participate in some high-risk sports in an effort to minimize their risk of sustaining a knee injury.

Functional Knee Braces

Do the functional knee braces work as well as a normal ligament?
This is an easy question to answer: No. However, the functional knee braces may help in patients who have a knee ligament injury. There have been a number of studies to investigate the effectiveness of these knee braces. The summary of these studies is that functional knee braces provide some protection to the knee at low loads. This means that when a force is applied to a knee that is supported with a functional knee brace, it is more stable than without the brace.

So doesn't that mean that functional knee braces work?
Not quite. The forces that are applied in these studies are thought to be much lower and more slowly applied than forces applied to the knee during competitive athletics. When a knee injury occurs during high-level sports, the knee is subjected to very high forces that occur very quickly. Unfortunately, testing these braces under these unique conditions is difficult. No one can prove that functional knee braces are of much help under these unique conditions.

Should I wear a functional knee brace if I have a ligament injury?
You should discuss this with your doctor, because it depends on several factors, including:

• Which ligaments are injured
• What sport you are participating in
• What rehabilitation you have done or plan to do

Prophylactic Knee Braces

Do athletes who wear knee braces have fewer injuries?
Again, the evidence is cloudy, because the difference is very small. Studies do show that athletes in certain sports (football) have a lower rate of MCL injury when wearing a prophylactic knee brace. However, the effect of the prophylactic knee brace should be placed in perspective. Much more important factors in determining the likelihood of an injury include:

• Sport played
• Player position
• Player conditioning
• Player size

Where should I obtain a knee brace?
The knee braces that are investigated in these studies are not simple knee sleeves or knee braces that can be purchased at a drug store. These knee braces need to be special ordered and prescribed by your physician. If you are interested in using a knee brace for competitive sports, you should contact your team doctor, or your orthopedic surgeon. Your doctor can prescribe the proper type of knee brace for you and your sport. Furthermore, any effective knee brace must fit properly. Once you have a knee brace, ensure that your doctor inspects the fit of the knee brace to ensure it is sized and placed properly.

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