[The problem of late results of total endoprostheses of the hip (author's transl)].

This is the report about our collective of 1000 hip-TEP operations from 1967--76. The relatively low loosening- and infection rate of other clinics without sterile box is confirmed: 2.9% loosening, 0.7% infections. The results of 5 years amounted to 1.1% infections and 1.38% loosenings. We refer to the inexplicable high loosening rate of 11% in patients operated within 12 months in 1973/74. The author thinks that the low loosening rate measured during the other periods is due to the consequent application of the "low-friction" original prosthesis of Charnley.