The invention relates to a dental abutment with internal connection to an implant and fixing by means of a fixing screw. The abutment is provided, apically at the connection end thereof with anti-rotation means for positioning and fixing the orientation of the abutment with respect to the implant, and with a through hole configured for the passage therethrough of the fixing screw, the axis of which extends in the longitudinal direction to the apical connection end. The anti-rotation means comprise a plurality of longitudinal protrusions separated from each other which extend in the direction parallel to the axis of the through hole at the apical connection end, the protrusions being equidistant with respect to said axis and being configured as merlons such that the separation space between two adjacent protrusions is connected to the through hole.
