For normal bone conditions, the size of the A-Osteopro- filer is usually limited by the conditions in the distal (not the proximal) femoral canal. Compared to the B-Osteo- profiler and the Bicontact® stem, the A-Osteoprofilers are cut free medially to compress the cancellous structures in this region. In cases of narrow conditions at the distal bone and small implant sizes, the A-Osteoprofiler need to be hammered in and out alternately, so that the bone chips can loosen from the profiler teeth, in the distal region. The prepara- tion of a very narrow proximal medullary canal has to be carried out with the smallest A- and B-profilers, alter- nately, until both can be inserted to the required depth. Use the Bicontact® stem shapes SD or N in such cases. Additional advice is given on page 00 of this document.