# US 2014/0154643 A1 · Superstructure and methods for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154643 A1 - Document ID: US20140154643A1 - Status: Published application - Kind: A1 - Application number: 14/117,931 - Filed: 2012-05-16 - Published: 2014-06-05 - Earliest claimed: 2011-05-16 - Assignees: Heraeus Dental AB - Inventors: Sture Benzon - Web page: https://patentgrep.com/patent/US20140154643A1 ## CPC - A61C 8/0068: {with an additional screw} - A61C 8/0012: {characterised by the material or composition, e.g. ceramics, surface layer, metal alloy (use of specific materials A61K6/00)} - A61C 8/0053: {with angular adjustment means, e.g. ball and socket joint} - A61C 13/34: Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4] - A61C 13/0022: {Blanks or green, unfinished dental restoration parts} - Y10T 29/49567: Dental appliance making - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method (30) for manufacturing a dental superstructure or part thereof is provided. The method comprises the steps of (i) making (31) a dental imprint from the mouth of a subject; (ii) mounting (32) an analog in the imprint to obtain a working model; (iii) attaching (33) a screw channel directing device (10, 20), comprising a screw channel part (11, 21) and an implant cooperating part (12, 22), said screw channel part (11, 21) being tiltable in relation to the implant cooperating part (12, 22), to the working model; (iv) tilting (34) the screw channel part (11, 21) in relation to the implant cooperating part (12, 22) into a desired angle; (v) shaping a mold creating a master superstructure or part thereof onto the screw channel directing device (10, 20); (vi) forming (37) a mold based on the master superstructure or part thereof; and (vii) casting (38) or CAD/CAM shaping of the dental superstructure or part thereof. Embodiments of screw channel directing devices are also provided. ## Claims ### Claim 1 A method for manufacturing a dental superstructure or part thereof, comprising the steps of (i) making a dental imprint from the mouth of a subject; (ii) mounting an analog in the imprint to obtain a working model; (iii) attaching a screw channel directing device, comprising a screw channel part and an implant cooperating part, said screw channel part being tiltable in relation to the implant cooperating part, to the working model; (iv) tilting the screw channel part in relation to the implant cooperating part into a desired angle; (v) shaping a mold creating a master superstructure or part thereof onto the screw channel directing device; (vi) forming a mold based on the master superstructure or part thereof; and (vii) casting or CAD/CAM shaping of the dental superstructure or part thereof. ### Claim 2 (depends on 1) The method according to claim 1, wherein step (vii) is casting, and further comprising the step of (viii) removing the screw channel directing device from the master superstructure between step (v) and step (vi); (ix) inserting a screw channel directing device, corresponding to the shape of the cavity formed by the screw channel directing device in step (v); and (x) attaching the screw channel directing device inserted in step (ix) by welding, gluing, or soldering. ### Claim 3 (depends on 1) The method according to claim 1, wherein screw channel directing device or the screw channel part thereof is melted during step (vi) or (vii). ### Claim 4 (depends on 1) The method according to claim 1, wherein screw channel directing device or the screw channel part thereof is a metal screw channel directing device or metal screw channel part, which is adhered to the superstructure during step (vii). ### Claim 5 A screw channel directing device, comprising a screw channel part and an implant cooperating part, said screw channel part comprising a screw channel mouth in the distal end, and a screw member seat with a screw hole in the proximal end, wherein the proximal end of the screw channel part is bowl shaped, such that the inner bottom surface has a concave shape and its outer bottom surface has a convex shape, and wherein the screw hole of the screw member seat is a long hole, and wherein said implant cooperating part is collar-shaped with an implant seat at its proximal end, and a distal concave screw channel part seat, wherein the screw channel part seat has a radius corresponding to the radius of the outer bottom surface of the screw channel part to form a ball joint, such that the central axis of the screw channel part may be tilted/angled in relation to a central axis of the implant cooperating part. ### Claim 6 A screw channel directing device, comprising a screw channel part and an implant cooperating part, said screw channel part comprising a screw channel mouth in the distal end, and a screw member with a distal gripping portion in the proximal end, said screw member being arranged in a screw member seat at the bottom proximal end of the screw channel, wherein said screw member has a screw member head in the proximal end, said screw member head having a head configuration in form of a peripheral contour, adapted for cooperation with the implant cooperating part, wherein said screw member part comprises a concave interaction surface for cooperation with a convex interaction surface on the implant cooperating part to form a ball joint, said screw member head having a slanting distal contact surface for cooperation with a contact surface on the implant cooperating part when the central axis of the screw channel part is angled in relation to the central axis of the implant cooperating part. ### Claim 7 (depends on 6) The screw channel directing device according to claim 6, wherein the screw member has a right handed threaded part proximally of the gripping portion, and the screw hole in the proximal end of the screw channel has a corresponding threading, such that the right handed threaded part of the screw member may run in the threading in the screw hole. ### Claim 8 (depends on 7) The screw channel directing device according to claim 7, further comprising a proximal thread portion, said proximal thread portion being left-handed threaded, and the screw member head has a corresponding threading, such that the left-handed threaded proximal thread portion of the screw member may run in the threading in the screw member head. ### Claim 9 (depends on 5) The screw channel directing device according to claim 5, wherein at least the screw channel part is of a plastic material. ### Claim 10 (depends on 5) The screw channel directing device according to claim 5, wherein at least the screw channel part is a metal screw channel part.