DENTAL IMPLANT
The invention relates to three-dimensional dimensionally-stable moulded parts made of polymeric particles whose particles are connected firmly to each other, at least in part, at the contact sites of the particles, whereby the particles are preferably glued to each other, at least in part, at the contact sites. The pre-packaged moulded parts made of polymeric, powdery particles made of PMMA can take up acrylate or MMA into the porous three-dimensional structure and form a pasty or creamy dough that can be cast, pressed or injected and can be cured by common techniques after the forming. Also subject matters of the invention are the use of and a kit for producing said pasty dough. Said pre-packaged moulded parts are used in methods for producing prostheses, such as dental prostheses, bone cements, investment compounds, in particular of porous substrates, as investment compound in metallography.
1 . Dental implant comprising an implant adapter ( 4 ) and a suprastructure ( 3 ), characterised in that
the implant adapter ( 4 ) is coronally arched in at least some sections and in that the suprastructure ( 3 ) is apically arched in at least some sections, whereby the apical curvature of the suprastructure ( 3 ) is convex and the coronal curvature of the implant adapter ( 4 ) is concave or the apical curvature of the suprastructure ( 3 ) is concave and the coronal curvature of the implant adapter ( 4 ) is convex, whereby the concave curvature is more pronounced than the convex curvature such that, in the assembled dental implant, the suprastructure ( 3 ) is connected to said implant adapter ( 4 ) by a cutting edge ( 5 ).
2 . Dental implant according to claim 1 , characterised in that
the convex curvature is arched to be convex at a first radius R 1 and the concave curvature is arched concave at a second radius R 2 , whereby the first radius R 1 is larger than the second radius R 2 .
3 . Dental implant according to claim 1 or 2 , characterised in that
the convex curvature is a convex spherical surface having a first radius R 1 and the concave curvature is a concave spherical surface having a second radius R 2 .
4 . Dental implant according to any one of the claim 2 or 3 , characterised in that the radii R 1 and R 2 are between 1 mm and 500 mm, preferably between 1.5 and 300 mm, particularly preferably between 5 and 100 mm.
5 . Dental implant according to any one of the claim 2 , 3 or 4 , characterised in that the ratio of radii R 1 to R 2 is less than 2:1, preferably is in the range of 20:19 to 2:1, more preferably is in the range of 10:9 to 4:3, particularly preferably the ratio of radii R 1 to R 2 is 7:6.
6 . Dental implant according to any one of the preceding claims, characterised in that
the curved surfaces comprise different diameters, such that, in the assembled dental implant, the external edge of the surface having the smaller diameter cuts as cutting edge ( 5 ) into the surface having the larger diameter, whereby it is preferred for the external edge of the surface having the concave curvature to have a smaller diameter than the external edge of the convex surface, whereby the external edge of the surface having the concave curvature forms the cutting edge ( 5 ) on the convex surface.
7 . Dental implant according to any one of the preceding claims, characterised in that
the implant adapter ( 4 ) having the convex coronal surface consists of a softer material than the suprastructure ( 3 ) or the suprastructure ( 3 ) having the convex apical surface consist of a softer material than the implant adapter ( 4 ).
8 . Dental implant according to any one of the preceding claims, characterised in that
the implant adapter ( 4 ) and/or the suprastructure ( 3 ) consist of a cobalt-chromium alloy, titanium, a titanium alloy and/or a ceramic material, in particular a zirconium oxide ceramic material.
9 . Dental implant according to any one of the preceding claims, characterised in that
the dental implant comprises a stem ( 1 ) for implanting into the jaw bone, whereby the implant adapter ( 4 ) can be placed on the stem ( 1 ) or can be connected to the stem ( 1 ) or is firmly connected to the stem ( 1 ) or is designed to be the same part as the stem ( 1 ).
10 . Dental implant according to any one of the preceding claims, characterised in that
the dental implant comprises a screw ( 2 ) for connecting the suprastructure ( 3 ) to the implant adapter ( 4 ), whereby the screw ( 2 ) comprises a thread for engaging an opposite thread, whereby the opposite thread preferably is arranged as internal thread in the stem ( 1 ), and the suprastructure ( 3 ) and the implant adapter comprise a feed-through ( 4 ) for the screw ( 2 ), whereby, preferably, at least the diameter of the feed-through in the suprastructure ( 3 ) is larger than the diameter of the screw ( 2 ) in the region of the thread and smaller than the diameter of a screw head ( 6 ) of the screw ( 2 ).
11 . Dental implant according to claim 10 , characterised in that
the suprastructure ( 3 ) comprises a convex coronal spherical surface having a radius R 3 and the screw ( 2 ) possesses, on the underside of the screw head ( 6 ), a concave spherical surface having the same radius R 3 such that a surface-to-surface contact of the underside of the screw head ( 6 ) to the coronal spherical surface of the suprastructure ( 3 ) is producible at different angles of the suprastructure ( 3 ) with respect to the implant adapter ( 4 ).
12 . Dental implant according to any one of the preceding claims, characterised in that
the assembly of the dental implant includes an angle between the implant adapter ( 4 ) and the suprastructure ( 3 ) and/or the stem ( 1 ) and the suprastructure ( 3 ) that is adjustable from 0° to 5°, preferably from 0° to 4°, more preferably from 0° to 3°, particularly preferably from 0° to 2°.