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