Every year in Germany more than 100,000 patients get a knee replacement surgery with this number steadily increasing. Endoprosthesis (or: knee replacement) as part of the treatment of the damaged knee joints implies replacement of one or both of the articular surfaces. The specialists distinguish between the following main types of knee replacement implants:
Unilateral arthroplasty (Sled prosthesis - replacement of the sliding surface of the joint)
Total joint replacement (Replacement of the whole joint)
The types of prostheses differ according to the scale of joint damage and are defined individually after the thorough examination. Our doctors comprehensively consult the patients about the various implant systems, their benefits and risks.
Before the surgery, the medical team at the hospital plans the procedure in detail and discusses the anesthesia. The operational planning is based on X-ray recordings or other imaging techniques. It helps to define the exact parameters of the knee replacement implants.
Generally, there are two classic designs of the knee replacement implants: mobile and fixed knee systems. The technical difference is in this case in the mobility of the upper and lower leg component sliding surface. The mobile bearings can rotate on the metal plate of the tibial component. The knee implants with fixed bearings are more stable. They click firmly into the metal component and are thus well fixed. Which kind of the implant to choose, is decided during the preliminary diagnostics and consultation. Both variants are absolutely safe, reliable and functional. They offer good mobility, flexion and sufficient stability.
The knee endoprosthesis is usually fixed by the so-called bone cement, which establishes a fixed connection between the bone and prosthesis. But there is also the possibility that the endoprosthesis is fixed without cement. The combination of both methods is common in practice - in this case we speak of a hybrid supply.
The entire knee joint needs replacement only in rare cases. More frequently only the part of the joint is worn or damaged. The LINK® sled prosthesis, used at our clinic, replaces only one side of the damaged cartilage surface and spares the massive surgical intervention.
If only one side / part of the joint is damaged and all the knee ligaments are safe, a partial slide end prosthesis or unicondylar endoprosthesis is implanted only on the inner or outer side of the knee joint. The advantage: the healthy areas of the knee as well as the cruciate ligaments remain intact.
If the entire knee joint is damaged, a surface prosthesis is implemented: The surgeons replace the entire surface of the thigh and lower leg bone.
In case of instability of the lateral and cruciate ligaments the special modular prostheses with different variants of the coupling are implemented. With different lengths and arbitrary stem extensions the stability of the knee can be restored even with bone defects. These modular endoprostheses allow individual adaptation of the prosthesis to the patient's needs: The individual components can be combined depending on the requirements. These prostheses are used in severe joint destruction or exchange interventions as part of the surgical revision.
This kind of knee replacement implant allows axial rotation and reduces the stress on the prosthesis anchorage. This model of knee replacement implant is available in two versions and four implant sizes (right and left):
We treat the patients with various diseases of the knee joint, mainly with degenerative diseases (osteoarthritis), inflammatory rheumatic knee disorders (rheumatoid arthritis), cartilage and the bone damages.Annually we perform more than 3 000 successful knee replacement surgeries. If you consider the possibility of knee replacement, we would be glad to consult you on the modern implant systems, applied at the orthopedic department of the Clinic of Friedrichshafen.