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:: Knees

The knee joint, which appears like a simple hinge-joint, is one of the most complex joints in the
body.

The knee joint is made up of the femur (thigh bone), tibia (lower leg bone) and patella (the
kneecap). All these bones are lined with articular cartilage (surface cartilage). This articular
cartilage acts like a shock absorber and allows a smooth, low friction surface for the knee to
move on. Between the tibia and femur lie two floating cartilages called menisci.
The medial (inner) meniscus and the lateral (outer) meniscus rest on the tibial surface
cartilage and are mobile. The menisci also act as shock absorbers and stabilizers. The knee is
stabilized by ligaments that are both inside and outside the joint. The medial and lateral collateral
ligaments support the knee from excessive side to side movement. The (internal) anterior and
posterior cruciate ligaments support the knee from buckling and giving way. The knee joint
is surrounded by a capsule (envelope) that produces a small amount of synovial (lubricating) fluid to help with smooth motion. Thigh muscles are important secondary knee stabilizers.

We tend to ignore our knees until something happens to them that causes pain. If we
take good care of our knees now, before there is a problem, we can really help ourselves.
In addition, if some problems with the knees develop, an exercise program can be extremely beneficial. To understand the functions, conditions, surgeries & procedures of the knee better,
we have included an interactive animated presentation.

Click on the topics below to go the desired section

Knee anatomy :: Knee arthritis
Knee Arthroscopy :: Total Knee Replacement (TKR) :: ACL Reconstruction
Unicondylar Knee Replacement (UKR) :: Revision Knee Replacement (RKR)

Normal anatomy of the Knee Joint

How does the Knee joint work?
Find out more in this web based movie.

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Arthritis of the Knee joint

The term arthritis literally means inflammation of a joint, but is generally
used to describe any condition in which there is damage to the cartilage.

Click here to go to the section on arthritis.

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Arthroscopy of the knee joint.

Arthroscopy is a surgical procedure in which an arthroscope is inserted into a joint.
Arthroscopy is a term that comes from two Greek words "arthro", meaning "joint"
and "skopein", meaning to "examine".

The benefits of arthroscopy involve smaller incisions, faster healing, a more rapid
recovery, and less scarring. Arthroscopic surgical procedures are often performed on
an outpatient basis and the patient is able to return home on the same day.

Find out more about Knee Arthroscopy from the following links.

Interactive Movie	Text version	Patient Info Handout

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Total Knee Replacement (TKR).

A total knee replacement (TKR) or total knee arthroplasty is a surgery that resurfaces
an arthritic knee joint with an artificial metal or plastic replacement parts called the
‘prostheses’.

Find out more about Total Knee Replacement with the following links.

Interactive Movie	Text version	Patient Info Handout

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ACL reconstruction

The anterior cruciate ligament is one of the major stabilising ligaments in the knee. It
is a strong rope like structure located in the centre of the knee running from the femur
to the tibia. When this ligament tears unfortunately it doesn’t heal and often leads to
the feeling of instability in the knee.

ACL reconstruction is a commonly performed surgical procedure and with recent
advances in arthroscopic surgery can now be performed with minimal incisions and
low complication rates.

ACL Reconstruction Hamstring tendon.

Interactive Movie	Text version	Patient Info Handout

ACL Reconstruction Patellar tendon

Interactive Movie	Text version	Patient Info Handout

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Uni condylar knee replacement.

This simply means that only a part of the knee joint is replaced through a smaller
incision than would normally be used for a total knee replacement. The knee joint is
made up of 3 compartments, the patellofemoral and medial and lateral compartments
between the femur and tibia (i.e. the long bones of the leg). Often only one of these
compartments wears out, usually the medial one. If you have symptoms and X-ray
findings suggestive of this then you may be suitable for this procedure.

Find out more about Unicondylar Knee Resurfacing with the following links.

Interactive Movie	Text version	Patient Info Handout

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Revision knee replacement.

This means that part or all of your previous knee replacement needs to be revised.
This operation varies from very minor adjustments to massive operations replacing
significant amounts of bone and hence is difficult to describe in full.

Find out more about Revision Knee Replacement with the following links.

Interactive Movie	Text version	Patient Info Handout