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The knee joint - joint replacement

If non-invasive and alternative surgical measures to treat arthritis are no longer successful, if pain and discomfort become stronger and the quality of life is reduced, the time has come for joint replacement surgery. Several types of implants are available, depending on the degree of damage to the knee. 

Durability: 15 years and more
As in hip replacement, the long-term results in knee replacement surgery are excellent. Recent studies have shown bicondylar surface replacements to be still fully functional after 15 to 20 years in over 90 percent of cases. We utilize only proven implants of the highest quality made by the worlds leading manufacturers. Which implant is best suited for you will be discussed with you thoroughly before surgery. 

Single (unicondylar) knee replacement
This can be used if the cartilage wear is restricted to just the inner, the outer side ort he knee-cap of the knee joint, whilst the other parts of the joint remain intact. The two halves of the implant match perfectly and are fixed into the bone with or without so-called "bone cement", comparable to a two-component glue. The joint function is reestablished and as a rule pain-free movement is achieved. After years of use, wear of the unresurfaced side of the knee or the knee cap can sometimes result in the need to change the implant into a total (bicondylar) knee replacement. 
Total (bicondylar) knee replacement
The most common type of joint implanted today. It replaces the complete surface of the knee joint where several parts of the knee have been affected by arthritis. Bone removal is minimal and the implant matches the natural shape of the knee. The implant is fixed to the bone, with or without bone cement, dependent on the quality of the bone and anticipated future wear. The knee continues to be stabilized by the ligaments.
Constrained or partially constrained knee replacement
This alternative is only used when the joint's own ligaments are no longer there, or are unable to stabilize the knee. The implant itself provides the necessary stability. The resultant stresses on the implant cemented into the bone are consequently high. Good long-term results can be attained but this type of implant has largely been replaced by the more modern implants mentioned above.
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