# US 11,298,236 B2 · Devices and methods for cementing insert bearing liner into acetabular cup component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,236 B2 - Document ID: US11298236B2 - Status: Granted - Kind: B2 - Application number: 16/316,580 - Filed: 2017-05-22 - Published: 2020-06-11 - Granted: 2022-04-12 - Earliest claimed: 2016-07-13 - Assignees: Zimmer, Inc. - Applicants: Zimmer, Inc. - Inventors: Paul Borries - Web page: https://patentgrep.com/patent/US11298236B2 ## CPC - A61F 2/34: Acetabular cups - A61F 2/30721: {Accessories} - A61F 2/30724: {Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity} - A61F 2/4609: {of acetabular cups} - A61F 2/30771: {applied in original prostheses, e.g. holes or grooves} - A61F 2002/30449: {the adhesive being cement} - A61F 2002/30578: {having apertures, e.g. for receiving fixation screws} - A61F 2002/30784: {Plurality of holes} - A61F 2002/3401: {with radial apertures, e.g. radial bores for receiving fixation screws} - A61F 2002/3448: {Multiple cups made of three or more concentric shells fitted or nested into one another} - A61F 2220/0025: Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements - A61F 2220/005: using adhesives - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract Described is an acetabular assembly comprising: an acetabular cup component (100) having an outer convex surface (104), an inner concave surface (106) defining a cup cavity, and a plurality of openings (116) that extend between the inner concave surface and the outer convex surface and that are configured to accommodate a fastener for attaching the acetabular cup component to an acetabulum of a patient; an insert bearing liner (200) defined by an inner concave surface (202) and an outer convex surface (206), and configured to be located at least partially within die cup cavity of the acetabular cup component; and a plurality of spacers (300) that are configured to be inserted into the plurality of openings in the acetabular cup component from the inner concave surface. ## Claims ### Claim 1 An acetabular assembly comprising: one or more fasteners; an acetabular cup component having an outer convex surface, an inner concave surface defining a cup cavity, and a plurality of openings that extend between the inner concave surface and the outer convex surface and that are configured to accommodate the one or more fasteners for attaching the acetabular cup component to an acetabulum of a patient; an insert bearing liner defined by an inner concave surface and an outer convex surface, and configured to be located at least partially within the cup cavity of the acetabular cup component; and a plurality of spacers that are configured to be inserted into the plurality of openings in the acetabular cup component from the inner concave surface, wherein the plurality of spacers are configured to be located between the outer convex surface of the insert bearing liner and the inner concave surface of the acetabular cup component in order to define a gap between the outer convex surface of the insert bearing liner and the inner concave surface of the acetabular cup component; wherein the plurality of spacers are configured to be secured within the plurality of openings in the acetabular cup component by an interference fit; wherein the plurality of spacers each include a larger diameter portion adjacent a proximal end of the spacer, a smaller diameter portion located adjacent a distal end of the spacer, and a middle portion extending from the larger diameter portion to the smaller diameter portion, the plurality of spacers configured to be inserted into the plurality of openings on the acetabular cup component leading with the smaller diameter portion; wherein the larger diameter portion and the smaller diameter portion are cylindrically-shaped; wherein the middle portion is frustoconically-shaped; and wherein the distal end of the spacer comprises a planar surface. ### Claim 2 (depends on 1) The acetabular assembly of claim 1, further comprising a cement layer formed within the gap between the inner concave surface of the acetabular cup component and the outer convex surface of the insert bearing liner. ### Claim 3 (depends on 2) The acetabular assembly of claim 2, wherein the cement layer is uniform and has a thickness defined by the gap. ### Claim 4 (depends on 1) The acetabular assembly of claim 1, wherein the gap between the outer convex surface of the insert bearing liner and the inner concave surface of the acetabular cup component has a uniform width. ### Claim 5 (depends on 1) The acetabular assembly of claim 1, wherein the proximal end of the spacer comprises a planar surface. ### Claim 6 (depends on 1) The acetabular assembly of claim 1, wherein the proximal end of the spacer comprises a concave surface. ### Claim 7 (depends on 1) The acetabular assembly of claim 1, wherein the frustoconically-shaped middle portion of the spacer has a constant slope. ### Claim 8 (depends on 1) The acetabular assembly of claim 1, wherein the outer convex surface of the acetabular cup component is coated with a porous material. ### Claim 9 (depends on 1) The acetabular assembly of claim 1, wherein the outer convex surface of the acetabular cup component is coated with a bone ingrowth promoting material. ### Claim 10 (depends on 1) The acetabular assembly of claim 1, wherein the outer convex surface of the acetabular cup component includes a plurality of depressions. ### Claim 11 (depends on 10) The acetabular assembly of claim 10, wherein the depressions comprise grooves. ### Claim 12 (depends on 10) The acetabular assembly of claim 10, wherein the depressions comprise dimples. ### Claim 13 (depends on 1) The acetabular assembly of claim 1, wherein the acetabular cup component includes a dome hole centered at an apex of the acetabular cup component, the dome hole extending from the inner concave surface towards the outer convex surface. ### Claim 14 (depends on 13) The acetabular assembly of claim 13, wherein the dome hole extends completely through the inner concave surface and the outer convex surface of the acetabular cup component. ### Claim 15 Ari acetabular assembly comprising: one or more fasteners; an acetabular cup component having an outer convex surface, an inner concave surface defining a cup cavity, and a plurality of openings that extend between the inner concave surface and the outer convex surface and that are configured to accommodate the one or more fasteners for attaching the acetabular cup component to an acetabulum of a patient; an insert bearing liner defined by an inner concave surface and an outer convex surface, and configured to be located within the cup cavity of the acetabular cup component; a plurality of spacers that are configured to be inserted into the plurality of openings in the acetabular cup component from the inner concave surface, wherein the plurality of spacers are configured to be located between the outer convex surface of the insert bearing liner and the inner concave surface of the acetabular cup component in order to define a gap between the outer convex surface of the insert bearing liner and the inner concave surface of the acetabular cup component, and wherein the plurality of spacers are configured to be secured within the plurality of openings in the acetabular cup component by a threaded connection; and a cement layer located in the gap between the inner concave surface of the acetabular cup component and the outer convex surface of the insert bearing liner, wherein the cement layer is configured to attach the acetabular cup component and the insert bearing liner; wherein the plurality of spacers each include a first cylindrically-shaped portion defined by a first constant diameter, a second cylindrically-shaped portion defined by a second constant diameter, and a middle frustoconically-shaped portion extending from the first cylindrically-shaped portion to the second cylindrically-shaped portion and having a linear slope therebetween, the first constant diameter being larger than the second constant diameter; wherein the threaded connection is formed between a thread structure on the second cylindrically-shaped portion of the spacer and a complementary thread structure on an internal surface of the opening in the acetabular cup component. ### Claim 16 (depends on 15) The acetabular assembly of claim 15, wherein the cement layer is uniform and has a thickness defined by the gap. ### Claim 17 (depends on 15) The acetabular assembly of claim 15, wherein the plurality of spacers are configured to be inserted into the plurality of openings on the acetabular cup component leading with the second cylindrically-shaped portion.