- A dental implantology assembly comprising an implant body devoid of an axial central bore of the type of axial central bore that houses a screw for fixing an implant body to a prosthetic abutment, a prosthetic abutment intended for being coupled to the implant body, and a tightening screw intended for fixing the prosthetic abutment to the implant body, wherein - the implant body is a single body comprising an apical segment for being fixed to the solid maxillary bone provided with a fixing thread, a solid gingival closure segment, and a connection segment configured by an open housing with a mostly spherical enveloping outer surface and a hollow with a mostly semispherical concave surface, wherein the center of the spherical outer surface coincides with the center of the semispherical surface of the hollow, the connection segment being formed by a plurality of radially distributed flexible sectors or petals in the form of spherical lunes, - the prosthetic abutment is formed by a body provided with a coupling cavity with a spherical concave surface formed by a wall which can be fitted in a partially enveloping manner and on the outside to the connection segment of the implant body, and provided with a threaded through hole, - the tightening screw is formed by a screw head with mostly a spherical surface, followed by a cylindrical neck and by a threaded shank that can be introduced in the threaded through hole of the prosthetic abutment, such that the screw head can be introduced in the hollow of the connection segment of the implant body with the threaded shank of the tightening screw inserted in the threaded through hole of the prosthetic abutment, - and in an operative mounting position of the implantology assembly wherein the screw head is inside the hollow of the connection segment of the implant body with the threaded shank of the tightening screw inserted in the threaded through hole of the prosthetic abutment, and the wall forming the spherical coupling cavity of the prosthetic abutment is fitted in a partially enveloping manner and on the outside to the connection segment of the implant body, the center of the outer surface of the connection segment of the implant body, the center of the spherical concave surface of the prosthetic abutment and the center of the spherical concave surface of the screw head are coinciding in position, the prosthetic abutment and the tightening screw having the capacity to rotate integrally with respect to the implant body about the longitudinal axis of the threaded shank of the tightening screw and the capacity to integrally turn with respect to the implant body such that the axial axis of the implant body and the longitudinal axis of the threaded shank can be arranged forming a plurality of angles with one another. - the implant body is a single body comprising an apical segment for being fixed to the solid maxillary bone provided with a fixing thread, a solid gingival closure segment, and a connection segment configured by an open housing with a mostly spherical enveloping outer surface and a hollow with a mostly semispherical concave surface, wherein the center of the spherical outer surface coincides with the center of the semispherical surface of the hollow, the connection segment being formed by a plurality of radially distributed flexible sectors or petals in the form of spherical lunes, - the prosthetic abutment is formed by a body provided with a coupling cavity with a spherical concave surface formed by a wall which can be fitted in a partially enveloping manner and on the outside to the connection segment of the implant body, and provided with a threaded through hole, - the tightening screw is formed by a screw head with mostly a spherical surface, followed by a cylindrical neck and by a threaded shank that can be introduced in the threaded through hole of the prosthetic abutment, such that the screw head can be introduced in the hollow of the connection segment of the implant body with the threaded shank of the tightening screw inserted in the threaded through hole of the prosthetic abutment, - and in an operative mounting position of the implantology assembly wherein the screw head is inside the hollow of the connection segment of the implant body with the threaded shank of the tightening screw inserted in the threaded through hole of the prosthetic abutment, and the wall forming the spherical coupling cavity of the prosthetic abutment is fitted in a partially enveloping manner and on the outside to the connection segment of the implant body, the center of the outer surface of the connection segment of the implant body, the center of the spherical concave surface of the prosthetic abutment and the center of the spherical concave surface of the screw head are coinciding in position, the prosthetic abutment and the tightening screw having the capacity to rotate integrally with respect to the implant body about the longitudinal axis of the threaded shank of the tightening screw and the capacity to integrally turn with respect to the implant body such that the axial axis of the implant body and the longitudinal axis of the threaded shank can be arranged forming a plurality of angles with one another.