Drilling tool (6) for dental implant surgery, this tool (6) comprising: a drilling head (7) a cylindrical mandrel rigidly connected to the head (7) and coaxial therewith, this mandrel being able to be mounted in a pin in order to effect a rotational coupling of the drilling head (7) to this pin a mesio-distal guide cylinder (18) coaxial with the drilling head (7), this mesio-distal guide cylinder (18) having an external diameter (D2), called the mesio-distal guide diameter, greater than the drilling diameter (D1) a vestibulo-lingual guide cylinder (19) coaxial with the drilling head (7) and situated under the mesio-distal guide cylinder (18), this vestibulo- lingual guide cylinder (19) having an external diameter (D3), called the vestibulo-lingual guide diameter, smaller than the mesio-distal guide diameter (D2).
