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Metha® Short Hip Stem

In this example, the Metha® short hip stem prosthesis, which is the most frequently used prosthesis in Germany, will be explained in greater detail. One of its characteristics is that the prosthesis is not just an implant, but a short hip stem prosthesis system.

Along with the generally accepted features of preserving bone and sparing soft tissue, the following characteristics should be mentioned regarding use of the Metha® short hip stem prosthesis:

It should be emphasized that Metha® has a modular design principle that permits individual adaptation to the patient’s anatomy during surgery.

This is possible because of a prosthetic stem whose basic shape remains the same, which can be arranged with different angular parameters on the actual prosthetic neck as well as in direct alignment with the hip socket as well as with the abdomen or back.

This principle gives the surgeon the following options in particular in terms of reconstructing the joint in a patient-specific manner and adjusting parameters as need be:
  • Adjusting the length of the leg 
  • Impacting soft tissue tension 
  • Counteracting any possible luxation tendencies

The additional use of a large head diameter for the sliding contact surfaces also allows influence to be exerted on the range of motion.

Prosthetic product line
Two different implant variations are available with the unchanged basic design of the prosthetic stem. Here the prosthetic system can be broken down in terms of a modular structure. Modular neck adapters allow greater angular parameters to be taken into account here.

The entire upper area of the prosthesis is sprayed with a calcium phosphate coating that promotes bone growth and accelerates integration of the prosthesis into the bone thereby contributing to quicker rehabilitation.

An additional treatment option is yielded in combination with the OrthoPilot® navigation system. As with a navigation system in an automobile, the surgeon is provided with information during surgery about patient-specific implant alignments and given recommendations for aligning the implants with one another.