Three-piece dental implant system with: an implant, an abutment and a screw of the abutment specifically designed to achieve very high primary and secondary stability at the bone-implant junction in a predictable and simple way, as well as long-term loose-protection stability of the prosthesis, wherein: - an external part of the implant body consisting of a progressive conical core with a variable conicity depending on the diameter and length of the implant body, which is surrounded by very sharp spirals separated from the core both horizontally and vertically; - an internal part consisting of a blind hole with two elements: a hybrid type connection and a female thread in which the abutment screw sits, wherein the hybrid type connection is formed by, from top to bottom: ∘ a) a first part formed by a pure cone ∘ b) a second zone or hybrid zone, shared between the extension of the pure cone and the beginning of vertical rails, and ∘ c) a third, lower, zone composed exclusively of the vertical rails which form a torx-type hexagon wherein - the abutment has a tapered seat to seat on the implant that prevents loosening of the prosthesis through optimal force distribution and friction locking; and - the tapered seating screw tightens the abutment onto the implant by locking it, wherein the abutment has an internal conical seat for a conical seating with the tapered seat of the screw and an external conical seat parallel to the internal conical seat for a conical seating with the pure cone of the implant forming a double parallel cone lock (13a, 13b), with double sealing. an implant, an abutment and a screw of the abutment specifically designed to achieve very high primary and secondary stability at the bone-implant junction in a predictable and simple way, as well as long-term loose-protection stability of the prosthesis, wherein: - an external part of the implant body consisting of a progressive conical core with a variable conicity depending on the diameter and length of the implant body, which is surrounded by very sharp spirals separated from the core both horizontally and vertically; - an internal part consisting of a blind hole with two elements: a hybrid type connection and a female thread in which the abutment screw sits, wherein the hybrid type connection is formed by, from top to bottom: ∘ a) a first part formed by a pure cone ∘ b) a second zone or hybrid zone, shared between the extension of the pure cone and the beginning of vertical rails, and ∘ c) a third, lower, zone composed exclusively of the vertical rails which form a torx-type hexagon - an external part of the implant body consisting of a progressive conical core with a variable conicity depending on the diameter and length of the implant body, which is surrounded by very sharp spirals separated from the core both horizontally and vertically; - an internal part consisting of a blind hole with two elements: a hybrid type connection and a female thread in which the abutment screw sits, wherein the hybrid type connection is formed by, from top to bottom: ∘ a) a first part formed by a pure cone ∘ b) a second zone or hybrid zone, shared between the extension of the pure cone and the beginning of vertical rails, and ∘ c) a third, lower, zone composed exclusively of the vertical rails which form a torx-type hexagon ∘ a) a first part formed by a pure cone ∘ b) a second zone or hybrid zone, shared between the extension of the pure cone and the beginning of vertical rails, and ∘ c) a third, lower, zone composed exclusively of the vertical rails which form a torx-type hexagon wherein - the abutment has a tapered seat to seat on the implant that prevents loosening of the prosthesis through optimal force distribution and friction locking; and - the tapered seating screw tightens the abutment onto the implant by locking it, wherein the abutment has an internal conical seat for a conical seating with the tapered seat of the screw and an external conical seat parallel to the internal conical seat for a conical seating with the pure cone of the implant forming a double parallel cone lock (13a, 13b), with double sealing. - the abutment has a tapered seat to seat on the implant that prevents loosening of the prosthesis through optimal force distribution and friction locking; and - the tapered seating screw tightens the abutment onto the implant by locking it, wherein the abutment has an internal conical seat for a conical seating with the tapered seat of the screw and an external conical seat parallel to the internal conical seat for a conical seating with the pure cone of the implant forming a double parallel cone lock (13a, 13b), with double sealing.