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Delete 		PER-24 In the illustrated embodiment, the tibial resection guide 822 is shaped such that the superior side 846 is not as wide as the inferior side 848. This shape can be advantageous because this enables the tibial resection guide 822 to be smaller towards the proximal end of the tibia 226. The inferior side 848 may be just large enough to support the resection feature 826. This triangular shape of the tibial resection guide 822 allows for a minimal length and width for the opening in the skin and soft tissue of the patient in order to secure the tibial resection guide 822 to the tibia 226. 254 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIGS. 9E and 9F illustrate the bone engagement surface 832 of an example tibial resection guide 822. The bone engagement surface 832 facilitates registration of the tibial resection guide 822 to the tibia 226. The position of the tibial resection guide 822 on a distal end of the tibia 226 may be determined by a surgeon preoperatively. 255 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 9F illustrates that the bone engagement surface 832 may be part of a tibial bone engagement feature 830 which may be part of a tibial resection guide 822. A bone engagement feature is any structure configured to engage or assist in the engagement of one or more bones. Thus, any structure that engages or assists in the engagement of a resection guides 820 with a bone is a bone engagement feature. 256 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 9F illustrates two examples of a bone engagement feature 830, tibial bone engagement feature of the tibial resection guide 822. In the illustrated embodiment, the bone engagement feature 830 includes a body section (i.e. part of the body 836) that is coupled to and/or supports a bone engagement surface 832. The bone engagement surface 832 is configured to register to (i.e. seated or fit with) a surface of the tibia, directly below and/or in contact with the body section when the tibial resection guide 822 is in use. As one example, this means that projections from the surface of the tibia 226 fit within voids in the bone engagement surface 832 when the tibial resection guide 822 is in use and in a desired position relative to a position of a model of the tibial resection guide 822 in relation to a model of a patient’s tibia 226. 257 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 9F illustrates that structurally, the tibial resection guide 822 may be able to function without the body sections identified as part of the bone engagement features 830. However, in the illustrated embodiment, the size (length, width, height) of the tibial resection guide 822 may be determined, defined, and/or dictated at least in part based on user instructions 604. Thus, the surgeon may also provide instructions for the number, size, and/or configuration of bone engagement feature 830 of the tibial resection guide 822. The bone engagement features 830 may not be needed structurally, however, they may be very helpful to a surgeon in positioning the tibial resection guide 822 in a desired position relative to a bone of a patient. 258 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 These user instructions 604 may have initiated the design and/or fabrication of the tibial resection guide 822. For example, a surgeon may have desired to have as much surface area on the posterior side 840 as possible while still keeping the overall size of the tibial resection guide 822 as small as practicable. Accordingly, in the illustrated embodiment, a surgeon may have indicated that two bone engagement feature 830 that includes bone engagement surface 832 are to be positioned and sized as indicated between the bone attachment features 828 and the tibia resection feature 864. In this manner, a surgeon may maximize an amount of surface area of the tibial resection guide 822 that contacts a tibia 226 to facilitate initial positioning intraoperatively to match or substantially match a position planned using a model of the tibial resection guide 822 and a model of the tibia 226. In certain embodiments, a surgeon may, at their discretion, include in the user instructions 604, instructions to add another body section that includes a bone engagement surface 832 to a medial side 842, a lateral side 844, a superior side 846, and/or an inferior side 848 of the tibial resection guide 822. 259 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 9G illustrates a cross section view of the tibial resection guide 822 in FIG. 9F taken along line 9G. FIG. 9G illustrates angles for bone attachment features 828 (e.g., fasteners 810 in openings). In the illustrated embodiment, the angles cause the bone attachment features 828 to diverge as they extend into the bone. Advantageously, a surgeon may predefine an angle for one or more bone attachment features 828 preoperatively. 260 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 9H illustrates a cross section view of the tibial resection guide 822 in FIG. 9F taken along line 9H. FIG. 9H illustrates angles for openings 868 that can cooperate with fastener 810 to provide resection guards 870. In the illustrated embodiment, the angle of the opening 868 nearest the lateral side 844 starts on the anterior side 838 and extends medially through the tibial resection guide 822 such that the fastener 810 extends at this same angle into the tibia 226. In contrast, the angle of the opening 868 nearest the a medial side 842 starts on the anterior side 838 and extends perpendicular to the anterior side 838 through the tibial resection guide 822 such that the fastener 810 extends at this same angle into the tibia 226. Advantageously, a surgeon may predefine one or more of these angles for resection guards 870 preoperatively. 261 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIGS. 10A-10F illustrate views of a resection guide 820 (e.g., talus resection guide 824) of the osteotomy system of FIG. 8, according to one embodiment. The talus resection guide 824 includes one or more resection features 826 (e.g., resection features 826a-b), one or more bone attachment features 828 (e.g., a fastener 810 and opening), and one or more bone engagement features 830, which may include a bone engagement surface 832. In certain embodiments, bone engagement features 830 implemented in a talus resection guide 824 are referred to as talus bone engagement features. 262 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 10F illustrates that the bone engagement surface 832 may be part of a bone engagement feature 830 which may be part of a talus resection guide 824. In the illustrated embodiment, the bone engagement surface 832 may be part of a talus bone engagement feature 830. FIG. 10F illustrates one example of a bone engagement feature 830, talus bone engagement feature of the talus resection guide 824. In the illustrated embodiment, the bone engagement feature 830 includes a body section (i.e. part of the body 850) that is coupled to and/or supports a bone engagement surface 832. The bone engagement surface 832 is configured to register to (i.e. seated or fit with) a surface of the talus, directly below and/or in contact with the body section when the talus resection guide 824 is in use. As one example, this means that projections from the surface of the talus 222 fit within voids in the bone engagement surface 832 when the talus resection guide 824 is in use and in a desired position relative to a position of a model of the talus resection guide 824 in relation to a model of a patient’s talus 222. 263 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIG. 10F illustrates that structurally, the talus resection guide 824 may be able to function without the body section identified as part of the bone engagement features 830. However, in the illustrated embodiment, the size (length, width, height) of the talus resection guide 824 may be determined, defined, and/or dictated at least in part based on user instructions 604. Thus, the surgeon may also provide instructions for the number, size, and/or configuration of bone engagement feature 830 of the talus resection guide 824. The bone engagement features 830 may not be needed structurally, however, they may be very helpful to a surgeon in positioning the talus resection guide 824 in a desired position relative to a bone of a patient. 264 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 These user instructions 604 may have initiated the design and/or fabrication of the talus resection guide 824. For example, a surgeon may have desired to have increased surface area on the posterior side 854 and medial side of the talus resection guide 824 as possible while still keeping the overall size of the talus resection guide 824 as small as practicable. Accordingly, in the illustrated embodiment, a surgeon may have indicated that one bone engagement feature 830 that includes bone engagement surface 832 is to be positioned and sized as indicated on the medial side between the resection feature 826a and the resection feature 826b. In this manner, a surgeon may selectively include surface area on the posterior side 854 of the talus resection guide 824 that contacts a talus 222 to facilitate initial positioning intraoperatively to match or substantially match a position planned using a model of the talus resection guide 824 and a model of the talus 222. In certain embodiments, a surgeon may, at their discretion, include in the user instructions 604, instructions to add another body section that includes a bone engagement surface 832 to a lateral side 858, a medial side 856, superior side 860, and/or inferior side 862 of the talus resection guide 824. 265 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 The resection features 826a,b can be similar or the same as the resection feature 826 described herein. In addition, the talus resection guide 824 includes an anterior side 852, a posterior side 854, a medial side 856, a lateral side 858, a superior side 860, and an inferior side 862. Generally, the sides of the talus resection guide 824 refer to the direction the sides face when the talus resection guide 824 is in use. In certain embodiments, the talus resection guide 824 can include a landmark registration feature 834. 266 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 In the illustrated embodiment, at least one landmark registration feature 834 extends from the posterior side 854. Advantageously, the landmark registration feature 834 can provide a surgeon with confidence and assurance in the placement and positioning of the talus resection guide 824 on the bone because the landmark registration feature 834 can be configured to engage with a particular landmark on the bone (e.g., a projection or a depression or cavity). Alternatively, or in addition, the landmark registration feature 834 can include a contoured bone engagement surface that can further facilitate registration of the landmark registration feature 834 and/or talus resection guide 824 with the bone. In this manner, a surgeon can be assured intraoperatively that the tibial resection guide 822 is being positioned as desired. 267 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 In certain embodiments, the landmark registration feature 834 can be shaped like a hook to engage a surface or structure of a bone. Alternatively, or in addition, the talus resection guide 824 may include a landmark registration feature 834 on each end (lateral and medial), together the landmark registration features 834 can engage one or more landmarks of a surface of the bone such that the surgeon can accurately position and register the talus resection guide 824 to the bone. 268 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIGs. 11A-11F illustrate views of a talus resection guide 872 of an osteotomy system, according to an alternative embodiment. It should be noted that the talus resection guide 872 of FIGS. 11A-F is a talus resection guide 872 that is similar or the same as the talus resection guide 824 described above, with the main difference being the talus resection guide 872 may be for a right ankle of a patient. Alternatively, or in addition, the talus resection guide 872 may be for a left ankle of a patient but the resection features 826 may be different from talus resection guide 824 due to user instructions 604 for a particular surgical procedure. 269 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 FIGS. 10E, 10F, 11D, 11E, and 11F illustrate a bone engagement surface 832 of an example talus resection guide 824. The bone engagement surface 832 facilitates registration of the talus resection guide 824 to the talus 222. The position of the talus resection guide 824 on a proximal end of the talus 222 may be determined by a surgeon preoperatively. FIGS 10E and 10J illustrate examples of a structure of a talus resection guide 824 that can serve as a landmark registration feature 834 and/or a bone engagement surface 832. The landmark registration feature 834 may form an indentation or pocket within a side wall of the talus resection guide 824. Whether or not a talus resection guide 824 includes a pocket shaped landmark registration feature 834 can depend on the anatomy of the patient and the desired position and orientation of the talus resection guide 824 as overseen by the surgeon. 270 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 Those of skill in the art will appreciate that the talus resection guide 824/872 and/or tibial resection guide 822 can be designed, engineered, organized, and/or fabricated using one or more of methods and/or processes described herein. 271 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 As explained, the exemplary ankle fusion osteotomy system 800 can include one or more complementary components 730 which serve to assist a surgeon during one or more steps of an osteotomy procedure. Those of skill in the art appreciate that a number of components can serve as complementary components 730. Examples of complementary components 730 include, but are not limited to, an alignment guide 740, a rotation guide 750, a correction guide 760, a compression guide 770, a positioning guide 780, a fixation guide 790, and one or more implants 796. 272 Added by DJM Jan 2024 1/6/24, 10:01 PM
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Delete 		PER-24 Furthermore, those of skill in the art appreciate that certain complementary component 730 may include one or more pins, fasteners 810, or other complementary component 730 that are designed and positioned to facilitate completing a surgical procedure. For example, certain pins or fasteners 810 may remain engaged with bones (prior to resection or after resection) to assist a surgeon in translating, compressing, rotating, and/or attaching fixation hardware to complete a surgical procedure. 273 Added by DJM Jan 2024 1/6/24, 10:01 PM

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