[The bi-contact endoprosthesis system--intermediate results of five years use]

The Bicontact endoprosthesis system has been used in our hospital with almost 1800 patients since 1987 for the treatment of painful destructive conditions of the hip joint, the proportion of traumatic subsequent conditions being 20%. It is a modular system that can be used with the same instruments for cementless and cemented fixation. The medium-term results of follow-up examinations over 5 years show that the biomechanical concept is correct. No aseptic loosening of the stem of prostheses has been reported to date, and it has not been necessary to change the prosthesis design. The femoral pain observed in the case of many other shaft prostheses implanted without cement has not been experienced owing to a particularly high rotational stability of the Bicontact shaft. The good results obtained in the meantime have led to an increase in the range of available models(dysplasia prosthesis). Work is progressing on the development of a revision prosthesis based on the biomechanical fixation principles of the Bicontact system.