# US 8,784,103 B2 · Connection arrangement between a dental implant and an abutment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,103 B2 - Document ID: US8784103B2 - Status: Granted - Kind: B2 - Application number: 12/678,618 - Filed: 2008-09-16 - Published: 2010-08-12 - Granted: 2014-07-22 - Earliest claimed: 2007-09-17 - Assignees: Straumann Holding AG - Applicants: Roger Studer; David Egli; Ulrich Mundwiler - Inventors: Roger Studer; David Egli; Ulrich Mundwiler - Web page: https://patentgrep.com/patent/US8784103B2 ## CPC - A61C 8/005: {Connecting devices for joining an upper structure with an implant member, e.g. spacers} - A61C 8/006: {with polygonal positional means, e.g. hexagonal or octagonal} - A61C 8/0068: {with an additional screw} - A61C 8/0087: {Means for sterile storage or manipulation of dental implants} - 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) ## Abstract A connection arrangement between a dental implant and an abutment is provided. The abutment has a first coronal opening and a second apical opening. The connection arrangement further has a screw and a ring, the ring being suitable for holding a screw inserted in the abutment. The ring is fixed in the first opening of the abutment with a positive fit or a material joint. ## Claims ### Claim 1 A dental implant connection arrangement, comprising: a screw, an abutment provided with a first coronal opening and a second apical opening, the first coronal opening being sized to allow insertion of the screw through the first coronal opening into the interior of the abutment, and a circular ring, wherein the ring retains the screw inserted in the abutment, wherein the ring is fixed fully within the first coronal opening of the abutment after insertion of the screw, at a location coronally above and remote from the screw with a non-positive or a positive fit or a material joint, such that a cavity is formed in the interior of the abutment, which allows play of the screw prior to attachment to a dental implant. ### Claim 2 (depends on 1) The connection arrangement according to claim 1, wherein a shaft of the screw has a portion which is shaped conically and abuts against a corresponding conical interior surface of the abutment. ### Claim 3 (depends on 1) The connection arrangement according to claim 1, wherein the ring is pressed into the first coronal opening of the abutment with a positive fit. ### Claim 4 (depends on 3) The connection arrangement according to claim 3, wherein the abutment has a coronally positioned abutment rim which is formed. ### Claim 5 (depends on 4) The connection arrangement according to claim 4, wherein forming of the abutment rim is carried out by crimping. ### Claim 6 (depends on 4) The connection arrangement according to claim 4, wherein forming of the abutment rim is carried out by rolling. ### Claim 7 (depends on 4) The connection arrangement according to claim 4, wherein forming of the abutment rim is carried out by crimping and/or rolling. ### Claim 8 (depends on 3) The connection arrangement according to claim 3, wherein the ring is provided with a vertical slot. ### Claim 9 (depends on 3) The connection arrangement according to claim 3, wherein the ring is provided with two or more expansion slots. ### Claim 10 (depends on 3) The connection arrangement according to claim 3, wherein the abutment is coronally provided with one or more expansion slots. ### Claim 11 (depends on 1) The connection arrangement according to claim 1, wherein the ring has a male thread which is screwed into the first coronal opening of the abutment with a positive fit. ### Claim 12 (depends on 1) The connection arrangement according to claim 1, wherein the ring is fixed in the first coronal opening of the abutment with a positive snap-fit. ### Claim 13 (depends on 12) The connection arrangement according to claim 12, wherein the snap-in connection is provided by a catcher in the abutment. ### Claim 14 (depends on 12) The connection arrangement according to claim 12, wherein the snap-in connection is provided by an abutment recess in the abutment and a ring catcher in the ring. ### Claim 15 (depends on 12) The connection arrangement according to claim 12, wherein the ring is provided with a vertical slot. ### Claim 16 (depends on 12) The connection arrangement according to claim 12, wherein the ring is provided with two or more expansion slots. ### Claim 17 (depends on 12) The connection arrangement according to claim 12, wherein the abutment is coronally provided with one or more expansion slots. ### Claim 18 (depends on 1) The connection arrangement according to claim 1, wherein the ring is welded by material joint in the first coronal opening of the abutment. ### Claim 19 (depends on 18) The connection arrangement according to claim 18, wherein the ring is welded to the abutment by laser welding or ultrasonic welding. ### Claim 20 (depends on 1) The connection arrangement according to claim 1, wherein a ring surface of the ring and/or the adjacent surface of the abutment at the first coronal opening of the abutment is provided with a structure. ### Claim 21 (depends on 20) The connection arrangement according to claim 20, wherein the structure is embodied in the form of grooves, knurling, thread or micro-thread. ### Claim 22 (depends on 1) The connection arrangement according to claim 1, wherein the ring is fixed coronally above and remote from the screw and wherein a shaft of the screw has a portion which is shaped conically and abuts against a corresponding conical interior surface of the abutment. ### Claim 23 (depends on 1) The connection arrangement according to claim 1, wherein the ring is fixed within the first coronal opening, such that the ring is fully housed within the abutment. ### Claim 24 (depends on 1) The connection arrangement according to claim 1, wherein the ring is fixed in the first coronal opening prior to connection of the abutment to the implant, such that the screw is preassembled within the abutment.