# US 2021/0330359 A1 · Burr hole cover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0330359 A1 - Document ID: US20210330359A1 - Status: Published application - Kind: A1 - Application number: 17/240,498 - Filed: 2021-04-26 - Published: 2021-10-28 - Earliest claimed: 2020-04-27 - Assignees: OsteoMed LLC - Applicants: OsteoMed LLC - Inventors: Benjamin Casey; Devid R. Zille; Justin L. Rowland - Web page: https://patentgrep.com/patent/US20210330359A1 ## CPC - A61B 17/686: {Plugs, i.e. elements forming interface between bone hole and implant or fastener, e.g. screw} - A61B 17/688: {for reattaching pieces of the skull} - B22F 5/10: of articles with cavities or holes, not otherwise provided for in the preceding subgroups - B33Y 80/00: Products made by additive manufacturing - A61B 2017/00526: {Methods of manufacturing} - A61B 2090/103: {Cranial plugs for access to brain} - B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] - Y02P 10/25: Process efficiency - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A burr hole cover is provided that is constructed to be positioned within a recessed region formed on a patient's skull in order to conceal a burr hole. The burr hole cover may be affixed to the patient's skull in the recessed region. For instance, surgical fastening devices may be inserted through apertures defined in the burr hole cover. The burr hole cover may have a thickness and curvature that enables it to be substantially flush with the surface of the skull when affixed in the recessed region. The burr hole cover's curvature follows the contour of the patient's skull. The burr hole cover may include one or more perforations sized to allow air (or moisture) to flow towards the burr hole, which promotes skin/bone growth. Some of the perforations may be large enough to permit access to the brain with leads and/or drainage devices. ## Claims ### Claim 1 A method for affixing a burr hole cover to a skull bone and over a burr hole, the method comprising: preparing a site on a patient for the burr hole; forming a burr hole in the skull bone of the patient at the prepared site; forming a recessed region in the skull bone of the patient at the prepared site; positioning a burr hole cover within the formed recessed region; and installing a respective surgical fixation device through each of one or more apertures of the positioned burr hole cover and into the skull bone to thereby affix the burr hole cover to the skull bone, wherein the recessed region of the skull bone is around the burr hole. ### Claim 2 (depends on 1) The method of claim 1, wherein the recess region is formed prior to forming the burr hole. ### Claim 3 (depends on 1) The method of claim 1, wherein the burr hole is formed prior to forming the recessed region. ### Claim 4 (depends on 1) The method of claim 1, wherein the formed recessed region has a uniform depth. ### Claim 5 (depends on 1) The method of claim 1, wherein the burr hole cover is constructed with a predefined curvature prior to positioning the burr hole cover within the formed recess region. ### Claim 6 (depends on 1) The method of claim 1, wherein the burr hole cover is flat prior to positioning the burr hole cover within the formed recess region, and wherein installing a respective surgical fixation device through each of the one or more apertures of the positioned burr hole cover and into the skull bone thereby induces a curvature of the burr hole cover. ### Claim 7 (depends on 1) The method of claim 1, wherein the recessed region is formed such that when the burr hole cover is affixed to the skull bone within the recessed region, a clearance between an edge of the burr hole cover and a wall of the recessed region is between 0.00 mm and 0.04 mm. ### Claim 8 (depends on 1) The method of claim 1, wherein the formed recessed region has two separate segments. ### Claim 9 (depends on 1) The method of claim 1, wherein the recessed region is formed with a width, the width being substantially perpendicular to a central axis of the burr hole, and wherein the width of the recessed region is uniform around the burr hole. ### Claim 10 A burr hole cover for affixation within a recessed region formed in a skull bone to thereby cover a burr hole formed in the skull bone, the burr hole cover comprising: a contact surface configured to contact the skull bone; a top surface opposite the contact surface; and one or more apertures extending from the top surface to the contact surface, each of the one or more apertures configured to receive a surgical fixation device such that when the surgical fixation device is fully inserted into a respective aperture, to thereby affix the burr hole cover to the skull bone, the surgical fixation device is at or below the top surface. ### Claim 11 (depends on 10) The burr hole cover of claim 10, wherein when the burr hole cover is affixed within the recessed region, the top surface is substantially flush with a surface of the skull bone. ### Claim 12 (depends on 10) The burr hole cover of claim 10, wherein each of the one or more apertures includes a sidewall that is inwardly beveled. ### Claim 13 (depends on 10) The burr hole cover of claim 10, wherein the contact surface has a contour that matches a contour of the skull bone. ### Claim 14 (depends on 10) The burr hole cover of claim 10, wherein the top surface has a contour that matches a contour of the skull bone. ### Claim 15 (depends on 10) The burr hole cover of claim 10, wherein the burr hole cover is constructed of titanium. ### Claim 16 (depends on 10) The burr hole cover of claim 10, wherein the burr hole cover has a non-uniform thickness, the thickness being measured from the top surface to the contact surface. ### Claim 17 (depends on 10) The burr hole cover of claim 10, wherein the burr hole cover includes one or more perforations separate from the one or more apertures. ### Claim 18 (depends on 17) The burr hole cover of claim 17, wherein at least one perforation is sized such that a medical instrument may be positioned through the at least one perforation. ### Claim 19 (depends on 17) The burr hole cover of claim 17, wherein at least one perforation is sized such that air and/or moisture may flow through the at least one perforation when the burr hole cover is affixed within the recessed region. ### Claim 20 (depends on 10) The burr hole cover of claim 10, wherein the burr hole cover is constructed from additive manufacturing or freeform fabrication.