Improvement in dental implant (1) belonging to the dentistry field, more precisely the implantology, comprising, basically: substantially cylindrical body (2) provided with a tip or top (3), intermediate section (4) and view tip (5), in which is provided top surface (6) featuring an non-passing (7) axial negative (crease) surface; the outer surface of said implant (1) is defined: by extreme third provided with thread (10) attached to the tip or top (3); by opposing extreme third provided with a thread (10') attached to the top surface (6); and by intermediate smooth third (without thread) (11), with a concave curved profile, characterized by two trunk-conical sections connected by the smaller bases, with curved concave profiles and whose larger bases are adjacent to threads (10) and (10)'.