Milling tool for seating a screw in a dental structure

A milling tool for seating a screw in a dental structure, the screw being provided to be joined to a dental implant, wherein the milling tool comprises:

• a coupling region provided for coupling to a milling machine and
• a working region defined by a rod of diameter Dt that on one end supports a head having a plurality of cutting blades radially distributed with respect to a longitudinal axis of the coupling region, the cutting blades comprising a distal end portion and a proximal end portion in respect of the rod,
• wherein the milling tool having a T-shaped transverse cross section,
• wherein each cutting blade has an upper cutting surface arranged at the distal end portion of the cutting blade, a lower cutting surface arranged at the proximal end portion of the cutting blade and a lateral cutting surface extending between the upper cutting surface and the lower cutting surface,
• wherein the lower cutting surface has a region with a convex curvature extending between the lateral cutting surface and the rod, the convex curvature being defined by a radius that varies between a maximum and a minimum value,
• the maximum value of the radius being equal to 0.1350*Dh, wherein Dh corresponds to the diameter of the effective area of the milling tool, and the minimum value of the radius complying with the formula:
• R
• min
• =
• 125
• ⁢
• 2
• ·
• 0.0012
• ⁢
• Dh
• 3.2
• wherein the convex curvature is configured to define a sector that subtends an angle of 180° such that a semicircular curvature protruding from the proximal end portion of the cutting blade is defined;
• and
• wherein Dh corresponds to the diameter, in a plan view, defined by the cutting blades, and wherein Dh>Dt.