# US 2014/0195000 A1 · Sperical subtalar implant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0195000 A1 - Document ID: US20140195000A1 - Status: Published application - Kind: A1 - Application number: 14/164,730 - Filed: 2014-01-27 - Published: 2014-07-10 - Earliest claimed: 2011-01-21 - Assignees: Trilliant Surgical LLC - Applicants: Trilliant Surgical, Ltd. - Inventors: Jon Olson - Web page: https://patentgrep.com/patent/US20140195000A1 ## CPC - A61F 2/4202: {for ankles} - A61B 17/8605: {Heads, i.e. proximal ends projecting from bone} - A61B 17/8625: {Shanks, i.e. parts contacting bone tissue} - A61B 17/863: {with thread interrupted or changing its form along shank, other than constant taper} - A61B 17/864: {hollow, e.g. with socket or cannulated} - A61B 17/869: {characterised by an open form, e.g. wire helix} - A61F 2002/30143: {hexagonal} - A61F 2002/30774: {internally-threaded} - A61F 2002/30784: {Plurality of holes} - A61F 2002/30787: {inclined obliquely with respect to each other} - A61F 2002/3085: {with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface} - A61F 2002/30866: {Rounded threads} - A61F 2002/30909: {Nets} - A61F 2002/4212: {Tarsal bones} - A61F 2002/4223: {Implants for correcting a flat foot} - B33Y 80/00: Products made by additive manufacturing - 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) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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 ## Abstract One embodiment of the invention includes a sinus tarsi implant with a proximal portion that includes a spherical portion. The spherical portion may include apertures for tissue in-growth. The implant design limits patient discomfort due to pressure points. Other embodiments are disclosed. ## Claims ### Claim 1 A subtalar implant comprising: a central hollow shaft defining a longitudinal axis and forming a tunnel; and a generally spherical portion having a three-dimensional spherical profile with an arcuate edge; wherein the spherical portion includes apertures that (a) do not directly connect to the central hollow shaft, but (b) do couple with each other via a void, which is not coterminous with the central hollow shaft, located inside the spherical portion. ### Claim 2 (depends on 1) The implant of claim 1, wherein a middle portion of the implant is non-threaded and a distal portion of the implant is threaded. ### Claim 3 (depends on 1) The implant of claim 1, wherein the apertures includes more than 15 apertures arranged in a series of rings. ### Claim 4 (depends on 1) The implant of claim 1, wherein each of the apertures includes a horizontal cross-sectional area between about 160,000 and 850,000 square microns. ### Claim 5 (depends on 1) The implant of claim 1, wherein (a) a distal portion of the implant includes a first maximum diameter, which is based on an outer diameter of a thread included in the distal portion, a middle portion of the implant includes a second maximum diameter, and the spherical portion includes a third maximum diameter, (b) the first maximum diameter is larger than the second maximum diameter but smaller than the third maximum diameter, and (c) the distal portion is proportioned to implant within the deeper canalis portion of the sinus tarsi of the patient. ### Claim 6 (depends on 1) The implant of claim 1, wherein the arcuate edge has an arc extending at least 100° in a longitudinal plane parallel to the longitudinal axis. ### Claim 7 (depends on 6) The implant of claim 6, wherein the spherical portion includes an additional arcuate edge that is circular and extends 360° in a horizontal plane orthogonal to the longitudinal axis. ### Claim 8 (depends on 7) The implant of claim 7, wherein the spherical portion includes a proximal-most end that is non-arcuate and coterminous with a proximal-most end of the implant. ### Claim 9 (depends on 1) The implant of claim 1 comprising: a first thread included in a distal portion of the implant and revolving about the distal portion, the first thread including a first thread crest portion; a first negative thread space located distal and directly adjacent to the first thread crest portion; a second negative thread space located proximal and directly adjacent to the first thread crest portion; wherein the first thread crest portion includes a first lip projecting across a lateral portion of the first negative thread space and a second lip, opposite the first lip, projecting across a lateral portion of the second negative thread space. ### Claim 10 (depends on 9) The implant of claim 9, wherein the first thread includes a first aperture directly connected to both the first negative thread space and the second negative thread space. ### Claim 11 (depends on 10) The implant of claim 10, wherein the first aperture is included in the first thread but is not included in the first thread crest portion. ### Claim 12 (depends on 1) The implant of claim 1, wherein the spherical portion includes an additional arcuate edge that is circular and extends 360° in a horizontal plane orthogonal to the longitudinal axis. ### Claim 13 (depends on 1) The implant of claim 1, wherein (a) in a first position the spherical portion is configured to contact the calcaneus of the patient at a first location at a first angle of contact, and (b) in a second position, where the implant is rotated less than 360° about a horizontal axis orthogonal to the longitudinal axis, the spherical portion is configured to contact the calcaneus at a second location yet still maintain the first angle of contact with the calcaneus based on the shape of the arcuate edge. ### Claim 14 (depends on 6) The implant of claim 6, wherein the arc has a midpoint located at the maximum diameter of a proximal portion of the implant and half of the arc is proximal to the midpoint and the other half of the arc is distal to the midpoint.