Dental prosthetic arrangement and dental prosthetic system
A dental prosthetic arrangement and a dental prosthetic system include a combination of a lower part assigned to a jaw implant and an upper part assigned to a prosthesis body in a connection section, wherein in particular two bearing faces are produced in the connection section when in the connected state, the bearing faces being cylindrical, preferably circular-cylindrical in relation to a center axis and being spaced apart from each other in the axial direction. The axial extent of the cylindrical bearing faces is advantageously small compared to the axial extent of the connection section. The two cylindrical bearing faces are preferably situated in axially opposite end regions of the connection section and are connected to each other by approximately conical wall faces of a cut-out in the upper part and a projection of the lower part that projects into the latter.
1. A dental-prosthetic assembly comprising a jaw implant and an abutment, which are connected with one another in a connection section, by way of a lower part assigned to the jaw implant and an upper part assigned to the abutment, wherein, in the connection section,
the lower part engages into a recess of the upper part with a projection that surrounds a center axis of the dental-prosthetic assembly,
the lower part and the upper part are supported against one another at multiple contact surfaces, with transfer of force,
a first contact surface is a first cylindrical contact surface, coaxial to the center axis, at an end of the connection section closest to the jaw implant,
a second contact surface is a second cylindrical contact surface, coaxial to the center axis, at an end of the connection section farthest from the jaw implant,
a diameter of the second contact surface is less than a diameter of the first contact surface,
a third contact surface is formed by a ring-shaped surface at the end of the connection section closest to the jaw implant, the ring-shaped surface being planar,
wherein the upper part has a conical wall surface, and the projection has approximately the shape of a truncated cone, the projection comprising a projection conical wall surface corresponding to the conical wall surface of the upper part,
wherein force components between the upper part and the lower part can be transferred exclusively by way of the first contact surface, the second contact surface, as well as the third contact surface,
wherein in a center section, a holding element engages into a first structure of the projection and a second structure of the recess, and brings about a holding force to prevent the upper part from being axially pulled off the lower part,
wherein the conical wall surface and the projection conical wall surface extend both below and above the holding element,
wherein the conical wall surface and the projection conical wall surface are spaced apart from one another by a first narrow gap and a second narrow gap, so that no transfer of forces takes place between the upper part and the lower part by way of contact of the conical wall surface and the projection conical wall surface,
wherein the first narrow gap is disposed above the holding element, and
wherein the second narrow gap is disposed below the holding element.
2. The dental-prosthetic assembly according to claim 1 , wherein the holding element lies against the first structure and the second structure in a rest state, free of external forces, under elastic bias, and brings about an axial press-down force against the third contact surface under the elastic bias.
3. The dental-prosthetic assembly according to claim 1 , wherein a cone angle of the projection conical wall surface of the lower part or a cone angle of the conical wall surface of the upper part in a region between the first contact surface and the second contact surface lies between 10° and 20°.
4. The dental-prosthetic assembly according to claim 1 , wherein the first structure is formed by a ring groove.
5. The dental-prosthetic assembly according to claim 1 , wherein the second structure is formed by a ring groove.
6. The dental-prosthetic assembly according to claim 1 , wherein the holding element contains at least one latch element that can be displaced transverse to the center axis.
7. The dental-prosthetic assembly according to claim 1 , wherein the holding element is formed by an elastically deformable ring.
8. The dental-prosthetic assembly according to claim 7 , wherein the elastically deformable ring comprises a rubber-elastic and/or elastically compressible material.
9. The dental-prosthetic assembly according to claim 1 , wherein the second structure has at least one insertion opening.
10. The dental-prosthetic assembly according to claim 9 , wherein the holding element has at least one pin-shaped section.
11. The dental-prosthetic assembly according to claim 1 , wherein the second structure has a perforation that is directed radially with reference to the center axis.
12. The dental-prosthetic assembly according to claim 11 , wherein the holding element can be radially displaced in the perforation.
13. The dental-prosthetic assembly according to claim 1 , wherein the holding force can be overcome without destruction of the upper part and the lower part, in order to release the connection between the upper part and the lower part.
14. The dental-prosthetic assembly according to claim 1 , wherein the holding force can be overcome without destruction of the holding element.
15. The dental-prosthetic assembly according to claim 1 , wherein the upper part and the lower part can be connected with elastic deformation of the holding element, with an axial plug-in movement.
16. A dental-prosthetic system comprising:
a dental-prosthetic assembly according to claim 1 , and
at least one additional holding element interchangeable with the holding element of the dental-prosthetic assembly,
wherein the at least one additional holding element and the holding element are for different holding forces.