["Mixing" of implants, a basic problem]. / "Mischen" von Implantaten, ein grundsätzliches Problem.

The so-called "mixing" of implants and instruments of different producers in hospitals leads to some risks. The use of standardized implant materials (e.g. stainless steel ISO 5832/1) by different producers is necessary but not sufficient for combining an osteosynthesis plate and a bone screw from different sources. The design, the dimensions and tolerances, the manufacturing, the quality control, the well tested applicational technique can be different too for the implants and the necessary instruments as well. This may lead to damage, failure or fracture of the biomechanical system called "osteosynthesis", that means failure of the therapy. Finally the patient pays for the problems. Some examples illustrate the potential problems for the involved staff or institutions. The use of a unique consistent well tested and approved set of implants and instruments must be recommended strongly to avoid any additional risk.