# US 12,765,985 B2 · Surgical guide > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,985 B2 - Document ID: US12765985B2 - Status: Granted - Kind: B2 - Application number: 18/864,611 - Filed: 2023-05-11 - Published: 2025-10-02 - Granted: 2026-10-20 - Earliest claimed: 2022-05-12 - Applicants: Ossability Limited - Inventors: Seamus John Tredinnick - Web page: https://patentgrep.com/patent/US12765985B2 ## CPC - A61D 1/00: Surgical instruments for veterinary use - A61B 17/157: {Cutting tibia} - A61B 17/1764: {for the knee} - A61D: VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A surgical guide adapted to receive and guide a surgical instrument for performing a bone osteotomy, the surgical guide including a body formed as an elongate block, the block further including first and second fixation apertures, the second fixation aperture adapted to receive a secondary fixation device on a second angle oblique to angle of the first fixation aperture, one or more further positioning apertures and a cutting channel. ## Claims ### Claim 1 A surgical guide adapted to receive and guide a surgical instrument for performing a bone osteotomy in a canine tibial tuberosity advancement (TTA) procedure, the surgical guide comprising: a body formed as an irregular polyhedral block, the irregular polyhedral block further comprising: an elongate cutting channel extending in a straight line longitudinally along at least a portion of a length of the user-facing surface between a first end and a second end and extending through the irregular polyhedral block from the user-facing surface to the opposing bone-facing surface, the elongate cutting channel having a discrete length such that the elongate cutting channel is bounded by the irregular polyhedral block through which it extends; a first fixation aperture extending through a portion of the irregular polyhedral block from a user-facing surface to an opposing bone-facing surface, the first fixation aperture configured to receive a primary fixation device on a first angle; a second fixation aperture extending through a portion of the irregular polyhedral block from the user-facing surface to the opposing bone-facing surface, the second fixation aperture configured to receive a secondary fixation device on a second angle oblique to the first angle, wherein the second fixation aperture is located on a first lateral side of the cutting channel; at least two positioning apertures extending through a portion of the irregular polyhedral block from the user-facing surface to the opposing bone-facing surface, the at least two positioning apertures configured to receive one or more positioning devices configured to, when received, abut an anterior edge of a tibial bone surface; wherein the at least two positioning apertures comprise a first positioning aperture and a second positioning aperture, each located on an opposing lateral side of the elongate cutting channel from the second fixation aperture and spaced apart from the longitudinal axis of the cutting channel; wherein the first positioning aperture is located substantially perpendicular to a mid-portion of the elongate cutting channel positioned between the first end and the second end, and the second positioning aperture is located substantially perpendicular to the second end of the elongate cutting channel; wherein a substantially perpendicular distance of the first positioning aperture from the longitudinal axis of the elongate cutting channel is greater than a second substantially perpendicular distance of the second positioning aperture from the elongate cutting channel. ### Claim 2 (depends on 1) The surgical guide of claim 1, wherein the second fixation aperture is adjacent to the first fixation aperture. ### Claim 3 (depends on 1) The surgical guide of claim 1, wherein the irregular polyhedral block is formed as an elongate irregular polyhedron with 6-20 polygonal faces. ### Claim 4 (depends on 1) The surgical guide of claim 1, wherein the irregular polyhedral block is tapered in at least one direction. ### Claim 5 (depends on 1) The surgical guide of claim 1, wherein the first fixation aperture is located at a first end of the elongate cutting channel and the elongate cutting channel extends from the first fixation aperture located at the first end of the elongate cutting channel to an opposing second end of the elongate cutting channel. ### Claim 6 (depends on 1) The surgical guide of claim 1, wherein one or more of the first fixation aperture, second fixation aperture or at least one positioning apertures are cylindrical in shape. ### Claim 7 (depends on 6) The surgical guide of claim 6, wherein one or more of the first fixation aperture, second fixation aperture or at least one positioning apertures are formed as straight, angled, or tapered cylinders. ### Claim 8 (depends on 1) The surgical guide of claim 1, wherein the irregular polyhedral block is formed from a polymer-based material and the first fixation aperture, second fixation aperture or at least one positioning apertures are sized and/or shaped to retain a surgical pin. ### Claim 9 (depends on 1) The surgical guide of claim 1, wherein the guide includes one or more measurement and/or alignment markings on the irregular polyhedral block surface. ### Claim 10 (depends on 1) The surgical guide of claim 1, wherein the bone-facing surface comprises contours that conform to a shape of the facing bone surface. ### Claim 11 (depends on 1) A surgical guide kit, the surgical guide kit including; a surgical guide as claimed in claim 1; at least two fixation devices; and at least two positioning devices.