A combination of a dental implant, an abutment and a threaded screw for use in a dental implant system, wherein the dental implant is provided with a guiding and lock means for associating the dental implant to the abutment, the guiding and lock means including: a first conically tapered section; and a second non-tapered section (4") arranged apically directly adjacent to the first section, the second section (4") being provided with an anti-rotational means (4"'; 24′′′; 34′′′; 54′′′; 64′′′), wherein the anti-rotational means (4′′′; 24′′′; 34′′′; 54′′′; 64′′′) of the second section (4") includes a surface extending radially with respect to the axis of the dental implant and adapted to cooperate with the abutment, such that to provide radial guiding to the abutment upon the insertion into the implant, and the abutment is provided with a guiding and lock means for associating the abutment to the dental implant, the guiding and lock means including: a first conically tapered section; and a second non-tapered section arranged apically directly adjacent to the first section, the second section being provided with an anti-rotational means (4'; 24'; 34; 54', 64'), wherein the anti-rotational means (4'; 24'; 34; 54', 64') of the second section includes a surface extending radially with respect to the axis of the abutment and adapted to cooperate with the dental implant, such that to provide radial guiding to the abutment upon the insertion into the implant, the abutment being adapted to axially hold the threaded screw for fastening the abutment to the dental implant, and wherein an overall axial length of the first, and second sections (7, 4) of the abutment and the position of the threaded screw within the abutment prior to fastening thereof to the dental implant are chosen such that the fastening of the threaded screw to a threaded section of the dental implant is only possible once the first and second sections (7, 4) of the abutment are fully inserted in their counterparts (7', 4") on the dental implant. a first conically tapered section; and a second non-tapered section (4") arranged apically directly adjacent to the first section, the second section (4") being provided with an anti-rotational means (4"'; 24′′′; 34′′′; 54′′′; 64′′′), wherein the anti-rotational means (4′′′; 24′′′; 34′′′; 54′′′; 64′′′) of the second section (4") includes a surface extending radially with respect to the axis of the dental implant and adapted to cooperate with the abutment, such that to provide radial guiding to the abutment upon the insertion into the implant, and the abutment is provided with a guiding and lock means for associating the abutment to the dental implant, the guiding and lock means including: a first conically tapered section; and a second non-tapered section arranged apically directly adjacent to the first section, the second section being provided with an anti-rotational means (4'; 24'; 34; 54', 64'), wherein the anti-rotational means (4'; 24'; 34; 54', 64') of the second section includes a surface extending radially with respect to the axis of the abutment and adapted to cooperate with the dental implant, such that to provide radial guiding to the abutment upon the insertion into the implant, the abutment being adapted to axially hold the threaded screw for fastening the abutment to the dental implant, and wherein an overall axial length of the first, and second sections (7, 4) of the abutment and the position of the threaded screw within the abutment prior to fastening thereof to the dental implant are chosen such that the fastening of the threaded screw to a threaded section of the dental implant is only possible once the first and second sections (7, 4) of the abutment are fully inserted in their counterparts (7', 4") on the dental implant. a first conically tapered section; and a second non-tapered section arranged apically directly adjacent to the first section, the second section being provided with an anti-rotational means (4'; 24'; 34; 54', 64'), wherein the anti-rotational means (4'; 24'; 34; 54', 64') of the second section includes a surface extending radially with respect to the axis of the abutment and adapted to cooperate with the dental implant, such that to provide radial guiding to the abutment upon the insertion into the implant, the abutment being adapted to axially hold the threaded screw for fastening the abutment to the dental implant, and wherein an overall axial length of the first, and second sections (7, 4) of the abutment and the position of the threaded screw within the abutment prior to fastening thereof to the dental implant are chosen such that the fastening of the threaded screw to a threaded section of the dental implant is only possible once the first and second sections (7, 4) of the abutment are fully inserted in their counterparts (7', 4") on the dental implant.