CHANNEL FORMATION FOR THE FIXING ELEMENT OF A DENTAL SUPERSTRUCTURE AND METHOD OF MAKING THE SAME

• US 20140349250A1
• Filed: 04/12/2012
• Published: 11/27/2014
• Est. Priority Date: 10/04/2011
• Status: Active Grant

• Current Assignee: Elsner Global LLC
• Original Assignee: Elsner Global LLC
• Inventors: Elsner, Edvin
• Granted Patent: US 10,034,725 B2
• Time in Patent Office: Days
• US Class Current: 433/174
• CPC Class Codes: A61C 13/0006 Production methods
• CPC Class Codes: A61C 13/0013 using stereolithographic techniques
• CPC Class Codes: A61C 13/20 Methods or devices for soldering, casting, moulding or melting A61C13/04, A61C13/081 take precedence
• CPC Class Codes: A61C 5/77 Methods or devices for making crowns
• CPC Class Codes: A61C 8/0037 Details of the shape
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/005 Connecting devices for joining an upper structure with an implant member, e.g. spacers
• CPC Class Codes: A61C 8/0051 Abutment monobloc with restoration
• CPC Class Codes: A61C 8/0068 with an additional screw
• CPC Class Codes: A61C 8/0089 Implanting tools or instruments

Abstract

Channel formation for the fixing element of a dental superstructure. The superstructure (1) is fixed to the implantation (3) integrated in the jaw bone by means of a fixing element (2). A channel (7) is formed in the superstructure (1). The axis line (8) of the channel (7) is shaped to follow an arc (9) whose radii pointing to given points of the axis line (8) diverge from the plane of the arc (9) by 0-5%. The channel (7) is shaped in such a manner that the sections determined by the planes perpendicular to its axis line (8) are circles with the same diameter with their centres on the axis line (8). In the method according to the invention a computer controlled device is used for forming the channel.

Claims

1. Channel formation for the fixing element of a dental superstructure by using a computer controlled device said superstructure is fixed—

preferably through an interface—

to the implantation integrated in the jaw bone by means of a fixing element through an outlet hole provided with a shoulder formed in said superstructure;

to ensure insertion of said fixing element a channel is formed in said superstructure between an inlet hole formed in said superstructure at its side facing the oral cavity and said shoulder of said outlet hole;

said outlet hole having a diameter corresponding to a threaded part of said fixing element is provided in another working process, characterized in that the axis line of said channel is shaped to follow an arc whose radii pointing to given points of said axis line diverge from the plane of said arc by 0-±

5%—

that is, in an advantageous case said axis line represents a three dimensional spiral, i.e. a right-handed or left-handed helical line instead of a two-dimensional arc;

further, said channel is shaped in such a manner that the sections determined by the planes perpendicular to its axis line are circles with the same diameter whose centers are on said axis line.

2. Formation of a dental superstructure according to claim 1 characterized in that said fixing element is a screw having a shank portion between its head and said threaded part, wherein the diameter of said shank portion is smaller than the diameter of said threaded part.

3. Formation of a dental superstructure according to claim 2 characterized in that in said interface threads corresponding to said threaded part of said fixing element are provided.

4. Formation of a dental superstructure according to any of claim 1 characterized in that said channel is formed by means of a spherical cutter wherein the shank diameter of the shank is at most 60% of the cutter-head diameter.

9. Formation of a dental superstructure according to any of claim 2 characterized in that said channel is formed by means of a spherical cutter wherein the shank diameter of the shank is at most 60% of the cutter-head diameter.

10. Formation of a dental superstructure according to any of claim 3 characterized in that said channel is formed by means of a spherical cutter wherein the shank diameter of the shank is at most 60% of the cutter-head diameter.

5. Method of forming a channel to accommodate the fixing element of a dental superstructure by using a computer controlled device, during the method the superstructure is fixed to the implantation integrated in the jaw bone by means of a fixing element introduced through an inlet hole of the channel and via an outlet opening formed in the superstructure, the outlet opening is provided with a shoulder, preferably, the outlet hole is bored into the superstructure from the side facing the implantation in another working process—

before or after forming the channel—

in such a manner that it has a diameter corresponding to the diameter of the shank of the fixing element, characterized in that between the side of the superstructure facing the oral cavity and the shoulder of the outlet opening a channel having a circular cross-section is formed by means of a spherical cutter thereby providing in the superstructure a bore-hole having a cross-section corresponding to the cross-section of the channel, the axis line of the bore-hole forms an arc in such a manner that radii running from the center of the arc and pointing to given points of the axis line of the bore-hole diverge from the plane of the arc by 0-±

5%, that is, in a certain case the axis line as well as the channel is formed helical, further, the channel is shaped in such a manner that the sections determined by the planes perpendicular to its axis line are circles of the same diameter with their centers on the axis line.

6. Method according to claim 5 characterized in that the channel is formed by means of a spherical cutter whose shank diameter is at most 60% of the cutter head diameter.

7. Method according to claim 5 characterized in that the superstructure is fixed to the implantation by means of a fixing element which between its head and the threaded part has a shank portion having a smaller diameter than the diameter of the threaded part.

8. Method according to any of claim 5 characterized in that the superstructure is fixed to the implantation through an intermediate piece in which threads corresponding to the threaded part of the fixing element are formed.

11. Method according to claim 6 characterized in that the superstructure is fixed to the implantation by means of a fixing element which between its head and the threaded part has a shank portion having a smaller diameter than the diameter of the threaded part.

12. Method according to any of claim 6 characterized in that the superstructure is fixed to the implantation through an intermediate piece in which threads corresponding to the threaded part of the fixing element are formed.

13. Method according to any of claim 7 characterized in that the superstructure is fixed to the implantation through an intermediate piece in which threads corresponding to the threaded part of the fixing element are formed.