English: hip prosthesis
The word "hip replacement" is synonymous with the term "hip joint endoprosthesis".
As part of a hip prosthesis implantation surgery, the human hip joint is replaced by an artificial, which consists in principle of the same parts. This means: In the context of such an operation one replaces the socket, the femoral neck and the femoral head.
In the pressure disc prosthesis, the "prosthesis stem" is anchored in a special shape.
An alternative prosthesis model is the pressure disc prosthesis
Although this form of prosthesis has already been developed in Switzerland about 20 years ago, it has only been on the market for several years. First, a pilot study of enlightened patients had to provide test results.
This form of prosthesis anchoring offers in comparison to the other (conventional) prosthesis models some advantages, but also known disadvantages, which will be discussed below
The replacement operations listed under 3. are usually necessary after about 10 to 15 years. When implanted at a high age, the life of such a prosthesis is not really relevant.
However, if a younger patient needs a prosthesis, the likelihood of a necessary replacement operation is significantly increased. For a thirty-year-old patient, this can mean a two or even a three-fold change operation. However, since the anchoring options decrease with each change operation, the pressure disc prosthesis can initially serve as an alternative. If such a prosthesis is first implanted, the bone substance remains as an anchoring option for conventional models of hip prosthesis, and thus the quality of the subsequently performed replacement operations also increases.
However, the pressure disc prosthesis shows - and this is critical to note at this point - in comparison to the classic prosthesis models, sometimes a much earlier occurring loosening rate.
Due to this increased loosening rate with premature necessary replacement surgery, this model of prosthesis is again used much less often than in the 1990s.
As already mentioned, this form of prosthesis is therefore to be recommended to young patients who want to achieve a postponement for the implantation of a conventional model with this prosthesis form.