A dental drill centering device for guiding the insertion direction of a dental implant comprising: - a body comprising a guiding hole for a dental drill defining a drilling axis, - two arms (20, 30) pivotally coupled to said body and including two respective free ends (22, 32), said arms (20, 30) being rotating between a first open position, in which said respective free ends (22, 32) are mutually spaced apart to promote the movement of the device from and towards an operating surface, and a second closed position, in which the free ends (22, 32) are approached to each other to abut an operating surface, - a first and a second abutment (23, 24) on one of said free ends and at least a third abutment on the other of said free ends, said first, second and third abutment (23, 24, 33) being mutually arranged so as to define a base plane of said device when said arms (20, 30) are in said closed position, - an elastic element constrained to said arms (20, 30) and shaped so as to push the arms (20, 30) towards said closed position, wherein each of said arms (20, 30) comprises a cylindrical end (27, 37) opposite to the corresponding free end (22, 32), said body configuring at least partially cylindrical seats in which said cylindrical ends (27, 37) of said arms (20, 30) are accommodated, and wherein the cylindrical ends (27, 37) of said arms (20, 30) comprise respective toothed sectors (25, 35) mutually meshing each other to guide the rotation of said arms (20, 30) between said open and closed positions, and wherein said body comprises: - a concave or flat abutment surface, facing towards said base plane and susceptible of abutting a gum or bone surface when said device is operating in said second closed position, - a rear base surface, - a peripheral wall protruding from said rear base and which delimits said seats for said cylindrical ends (27, 37) of said arms (20, 30), said peripheral wall comprising a lower wall and an upper wall opposite to said lower wall, said guiding hole passing through said lower wall and said upper wall, - circumferential openings (67, 68, 670, 680) from which intermediate portions (29, 39, 29B, 39B) of said arms (20, 30), respectively, protrude. - a body comprising a guiding hole for a dental drill defining a drilling axis, - two arms (20, 30) pivotally coupled to said body and including two respective free ends (22, 32), said arms (20, 30) being rotating between a first open position, in which said respective free ends (22, 32) are mutually spaced apart to promote the movement of the device from and towards an operating surface, and a second closed position, in which the free ends (22, 32) are approached to each other to abut an operating surface, - a first and a second abutment (23, 24) on one of said free ends and at least a third abutment on the other of said free ends, said first, second and third abutment (23, 24, 33) being mutually arranged so as to define a base plane of said device when said arms (20, 30) are in said closed position, - an elastic element constrained to said arms (20, 30) and shaped so as to push the arms (20, 30) towards said closed position, - a concave or flat abutment surface, facing towards said base plane and susceptible of abutting a gum or bone surface when said device is operating in said second closed position, - a rear base surface, - a peripheral wall protruding from said rear base and which delimits said seats for said cylindrical ends (27, 37) of said arms (20, 30), said peripheral wall comprising a lower wall and an upper wall opposite to said lower wall, said guiding hole passing through said lower wall and said upper wall, - circumferential openings (67, 68, 670, 680) from which intermediate portions (29, 39, 29B, 39B) of said arms (20, 30), respectively, protrude.