[Head endoprostheses in femoral neck fractures].

By clinical, radiographic and scintigraphic means we attempted to examine, whether the implantation of a simple head-endoprosthesis after fractures of the femoral neck still has to be considered as an appropriate operating method or whether on principle, primary endoprosthesis should be used. The results prove that in suitable cases and with correct technique the head-endoprosthesis still has justification, especially as the "protrusio acetabuli", known only as complication of pure head-endoprosthesis, is mostly avoidable. Reference to the choice of cases, operating conditions and appropriate methods of examination are given.