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Total Knee Replacement Archives | Page 2 of 2 | Orthoped

Antibiotic Treatment

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General Information, Total Knee Replacement

The choice of antibiotic
The selection of the antibiotic for the treatment of the infection around the total joint depends on the sensitivity of the bacterial strain that caused the infection.
Unfortunately, often there is more than one bacterial strain found in the infected joint.
Moreover, in about 10 -20 per cent of all total joint infections, no bacteria grow in the sample taken from the infected joint, although there are other obvious signs of infection present. (more…)

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Total Knee Replacement And Sports

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Total Knee Replacement

Stresses on your new knee joint

The muscles that cross the knee joint act on the knee joint by a system of levers. The dynamic effect of these combined forces is that the resultant loads acting on the knee joint of a moving person are several times higher than the body weight.

In total knee prosthesis, the stresses are concentrated on smaller areas than in normal knees.
Here are some examples of peak loads that occur on the surfaces of a total knee joint prostheses during sport’s activities: (more…)

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Alternative knee operations

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Total Knee Replacement

Contents:

  • Arthroscopic “shaving” and other procedures
  • Transplantation of tissues and cells
  • Osteotomy
  • Arthrodesis

(more…)

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Polyethylene wear total knee joints

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Total Knee Replacement

Contents:

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Mobile Bearing Total Knee

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Total Knee Replacement

Contents

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Posterior Stabilized Total Knee

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Total Knee Replacement

Contents:

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What is a total knee prosthesis

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General Information, Total Knee Replacement

Contents:

classification of total knee prostheses

unicompartmetal total knee

tricompartmental total knee

posterior stabilized total knee

cemented / cementless total knee

mobile and fixed bearing

materials for total knee / incongruent joint surfaces

There is no such total knee joint prosthesis that can mimic the complicated forms of surfaces of the knee joint and the “fuzzy biomechanics” of a healthy knee joint. Every total knee joint prosthesis is thus a compromise, that mimic only certain characteristics of the natural knee joint. The classification of total knee prostheses is equally “fuzzy”. (more…)

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Computer Assisted Total Knee Surgery

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Total Knee Replacement

The principle of the Computer Assisted total knee operation is simple:

The computer program produces a map of the patient’s knee. The map is reproduced on a large screen. The position of surgeon’s hands and instruments are incorporated in this map too.

The progress of the operation is monitored on the screen. The total knee surgery is turned into something akin to an instrumented landing of an aircraft.

This is theory. In practice, the computer systems used just now in total knee surgery are more simple. (more…)

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Linked Total Knee Prostheses

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Total Knee Replacement

These total knee prostheses permit flexion and extension and  allow for a limited rotation. The linked total knee prostheses, however, prevent movements to both sides (abduction and adduction) of the knee joint. That is their purpose: to provide the total knee with intrinsic side stability.

The limited amount of rotation, that these prostheses allow, improves gait and decreases stresses on the bone -skeleton interface created by walk and other activities.  Thus, in contrast to the old true hinged total knees, the linked total knee prostheses have lover rates of complications. (more…)

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Total knee operation – How is it done

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Total Knee Replacement

Contents

The name “Total Knee Replacement” is a misnomer.

In this operation, the surgeon removes only the damaged surfaces of the knee joint and then covers them with surface shells made of metal and polyethylene.

The proper name would thus be “the surface replacement of the knee joint”.

Here follows only a very short course on the principles of the operation itself.

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