The invention relates to an implant system containing at least one drill and one implant, particularly a dental implant, which can be screwed into a bore hole made in a bone by means of a drill. Preferably, the implant comprises a self-cutting screw with a thread core. The aim of the invention is to further develop an implant system which guarantees high primary stability for a wide variety of bone qualities and requires little technical complexity. According to the invention, the implant and the drill are co-ordinated in such a manner according to bone quality that a compressed zone arises when the implant is screwed into the implant in the bone. The size of the compressed zone is greater for low bone quality than for high bone quality.