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TMC-PAT-4 In alternative embodiments, a resection feature may be designed to guide a different type of cutter, such as a drill, mill, or side-cutting burr. In such embodiments, the resection feature may not be a slot, but may instead be a translatable or rotatable cutter retainer that guides translation and/or rotation of the cutter relative to the bone. In certain embodiments, two or more resection features may be replaced by a single resection feature sized to permit a surgeon to resect multiple midfoot bones using a resection guide 820b. 297 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In one embodiment, a proximal resection feature 902 is configured to define a first cut surface that can be formed by resecting a first bone. A distal resection feature 904 is configured to define a second cut surface that can be formed by resecting a second bone. In such an embodiment, one or the other or both of the first cut surface and the second cut surface can be oriented according to one or more angles relative to landmarks on the bones or other anatomical structures. 298 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Alternatively, or in addition, in certain embodiments, one or both of, the proximal resection feature 902 and distal resection feature 904 may be positioned on, or in, the body 900 and/or have an orientation based on patient imaging data. The patient imaging data can be used to position and orient one, or both, of the proximal resection feature 902 and distal resection feature 904 such that formation of one, or both, of the first cut surface and the second cut surface and fixation of the two cut surfaces against each other mitigates a condition of the patient. For example, as described in the present disclosure, patient imaging data can be used to generate bone models of bones of the patient. The bone models can be used to determine and/or define contours for a bone engagement surface, a position for a proximal resection feature 902, an orientation for a proximal resection feature 902, a position for a distal resection feature 904, an orientation for a distal resection feature 904, as well as other features, aspects, and/or attributes of one or more patient specific instruments that can be used in a procedure. 299 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 FIG. 9A is a medial-proximal perspective view of one example resection guide 820b. This figure illustrates the proximal side 918, one example of a landmark registration feature 960, and a number of the aspects of the resection guide 820b. In addition, FIG. 9A illustrates one or more markings 970a, 970b or indicators. In the illustrated embodiment, marking 970a is a letter “C” formed by a recessed structure in the shape of the letter “C” and marking 970b is a letter “M” formed by a recessed structure in the shape of the letter “C”. The marking 970a and/or marking 970b can be debossed or embossed. In one embodiment, the one or more markings 970a, 970b or indicators may extend through the resection guide. For example, the one or more markings 970a, 970b or indicators may extend from the superior side 914 to the inferior side 916. 300 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Marking 970a is in the shape of “C” which stands for “Cuneiform” and marking 970b is in the shape of "M” which stands for "Metatarsal”. The marking 970a is positioned towards the proximal end 824 to indicate that this side of the resection guide 820b is to be positioned over the cuneiform of a patient. The marking 970b is positioned towards the distal end 826 to indicate that this side of the resection guide 820b is to be positioned over the metatarsal of a patient. Advantageously, the marking 970a and marking 970b indicate for a surgeon and/or a technician the proper distal to proximal orientation of the resection guide 820b for the surgical procedure. Furthermore, the use of the first character for names of bones derived from Latin and/or the use of markings for letters in a “Latin script” or “Roman script” in which letters and words are written and read from left to right and from top to bottom, enables a user to quickly orient the resection guide 820b such that the medial side 922 is on the medial side of the foot bones and/or a joint (e.g., TMT joint) and the lateral side 924 is on the lateral side of the foot bones and/or the joint. Thus, the marking 970a and marking 970b assist in accurate and correct placement and/or orientation of the resection guide 820b relative to the anatomy of a patient. 301 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In certain embodiments, the one or more markings 970a, 970b or indicators may be positioned on one side of the resection guide. (See FIGS. 10A, 10B) In such an embodiment, the one or more markings 970a, 970b or indicators may extend from the superior side 914 to the inferior side 916 which may facilitate identification of a correct and/or desired positioning of the resection guide when viewed with fluoroscopy. In particular, markings 970a, 970b that extend through the material of the resection guide will show up more readily on the scope and can permit visibility to structures underneath the markings 970a, 970b. 302 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 FIG. 9B is a superior side view of one example resection guide 820b. FIG. 9B illustrates the window 906 and its relationship to the proximal resection feature 902 and/or distal resection feature 904, in one embodiment. In the illustrated embodiment, the window 906 is positioned between the proximal resection feature 902 and the distal resection feature 904. In addition, the window 906, in this embodiment, is an opening that extends from the superior side 914 to the inferior side 916. 303 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 The window 906 serves to enable a surgeon to visualize anatomy below the resection guide 820b when the resection guide 820b is positioned on one or more bones of a patient (e.g., on a dorsal side). In the illustrated embodiment, the window 906 is an opening. Alternatively, or in addition, the window 906 can be a solid structure that is opaque to light but radiolucent to electromagnetic waves (e.g., X-rays, both still x-rays and fluoroscopy). 304 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 The window 906 can have a variety of sizes and/or shapes and can be patient-specific or patient-matched. Alternatively, or in addition, the size and/or shape of the window 906 can be determined at least in part by the surgeon which plans to use the resection guide 820b. In certain embodiments, the window 906 is sized and/or shaped to enable visualization of as much of the anatomy of the patient, while maintaining the structural integrity of the body 900, proximal resection feature 902, and/or distal resection feature 904. Advantageously, the window 906 is sized to enable visualization of one or more articular surfaces of one or more bones facing the inferior side 916 of the resection guide 820b. In one embodiment, the window 906 is configured to enable observation of an articular surface and/or an end of both a cuneiform and a metatarsal of a TMT joint. 305 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Due to the small size of the cuneiform and a metatarsal of a TMT joint and potential for significant improvement in quality of life for patients undergoing an arthrodesis of the TMT joint, a surgeon may appreciate the opportunity to view the anatomy of the bones in relation to the resection guide 820b and/or the trajectories of resections to be made using the proximal resection feature 902 and/or distal resection feature 904. Thus, having a resection guide 820b with a window 906 can provide a significant level of confidence and relief of stress prior to making any resections of the bones. For example, a surgeon can position and secure the resection guide 820b to one or more bones of the foot of the patient and then use fluoroscopy to visualize where the ends of the bones in relation to the proximal resection feature 902 and/or distal resection feature 904 that will be used to resect the bones. Having the ability to see where the bones end can provide certainty and/or clarity to a surgeon prior to performing any of the osteotomies. In certain embodiments, because the window 906 facilitates resection or performance of osteotomies, the window 906 may be referred to as a resection window. 306 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In the illustrated embodiment, the window 906 has a lateral end that begins towards the lateral side 924 of the body 900 and a medial end that is near the medial side 922. Furthermore, the window 906 has a proximal side 932 that extends into and/or connects with the proximal resection feature 902. In one embodiment, the window 906 may also include a distal side 934 that extends into and/or connects with the distal resection feature 904. The extension of the proximal side 932 and the distal side 934 may form a pair of lateral fingers 936 that extend towards the medial side 922 and a pair of medial fingers 938 that extend towards the lateral side 924. In certain embodiments, the lateral fingers 936 and/or medial fingers 938 are configured to have sufficient structural integrity to retain a cutting tool within the proximal resection feature 902 and/or distal resection feature 904 and may be as short as possible to maximize the size of the window 906 while still enabling the proximal resection feature 902 and/or distal resection feature 904 to guide a cutting tool for the resection(s). Advantageously, the space between the proximal side 932 and distal side 934 enables visualization of the ends of one or more bones that the surgeon will resect using the resection guide 820b. 307 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 The window 906 may be configured to show one or more bones on an inferior side of the resection guide 820b when the resection guide 820b is in use. In the illustrated embodiment, the window 906 is positioned between the resection features 902, 904. The window 906 can be made up of a single opening, a pair of openings, or a plurality of openings. In one embodiment, the window 906 includes a plurality of openings that extend from the superior side 914 to the inferior side 916. The single opening and/or plurality of openings may have a variety of forms, shapes, sizes, and/or configurations. In one embodiment, the window 906 may be a rectangular or other polygonal opening. The window 906 enables a surgeon to view past the resection guide 820b to visualize progress before, during or after one or more dissection or resection steps. 308 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 FIG. 9B also illustrates the first bone attachment feature 908 and second bone attachment feature 910. The bone attachment features 908, 910 are configured to engage one or more bones of the patient to couple the body 900 to one or more bones of the patient. As embodied in FIGs. 9A through 9G, the bone attachment features 908, 910 may take the form of one or more holes 940 that extend from the superior side 914 to the inferior side 916 and/or one or more fixation devices (e.g., fasteners 710, a first fastener and a second fastener). The holes 940 may be shaped to accommodate pins, K-wires, and/or other elongated bone fixation elements that can be anchored in a cuneiform and/or a metatarsal to keep the resection guide 820b in place. In one embodiment, a first bone attachment feature 908 can include a single hole 940 and a second bone attachment feature 910 can include a single hole 940. 309 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In one embodiment, the first bone attachment feature 908 and the second bone attachment feature 910 may each include a set of two holes 940 each hole configured to accept a fastener 710. Two holes 940 may be used to prevent rotation or pivoting of the resection guide 820b about a single fastener 710 in one hole. The holes 940 may be referred to as a set of openings, such that the resection guide 820b may include a set of proximal openings configured to accept a first pair of fasteners and a set of distal openings configured to accept a second pair of fasteners. 310 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Alternatively, or in addition, in certain embodiments, the holes may have a non-circular geometric shaped cross section (e.g., triangle, square, oval, etc.) and the fastener 710 may have a similar and corresponding non-circular geometric shaped cross section such that a single hole and a single fastener 710 can be used for one or more of the first bone attachment feature 908 and the second bone attachment feature 910. 311 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In the illustrated embodiment, the first bone attachment feature 908 is near the proximal end 824 and the second bone attachment feature 910 is near the distal end 826. In such an embodiment, the first bone attachment feature 908 may be referred to as a proximal bone attachment feature and the second bone attachment feature 910 may be referred to as a distal bone attachment feature. In one embodiment, the holes 940 of the first bone attachment feature 908 may be aligned, or may be substantially aligned, with the holes 940 of the second bone attachment feature 910. Alternatively, or in addition, the first bone attachment feature 908 and second bone attachment feature 910 are not aligned, longitudinally along the body 900, with each other. 312 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Advantageously, the models, methods, systems, and/or apparatuses of the present disclosure facilitate mapping or translating between a virtual or model environment and/or instrumentation to a physical or real-world environment for a surgical procedure. The present disclosure provides this feature or benefit by providing an apparatus, system, and method, that enables a surgeon to identify, create, form, and/or use reference features for a surgical procedure. The reference feature provides a reference and/or starting point on, in, or associated with anatomy of a patient such that steps, stages, features, or aspects planned and configured within the model can be accurately performed on, with, or to the anatomy of the patient. In certain embodiments, one or more steps of a surgical procedure can be done in connection with or in relation to the reference feature. 220 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 The reference feature facilitates moving from one coordinate system or frame of reference in a virtual environment to a position, location, frame of reference, environment, or orientation on, or in, an actual object, structure, device, apparatus, anatomical structure, or the like. Advantageously, the reference feature can coordinate objects, models, or structures in a digital or virtual model or representation with corresponding objects or structures (e.g., anatomical structures) of actual physical objects or structures. Said another way, the reference feature can serve to map from a virtual or modeled object to an actual or physical object. 221 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 Advantageously, the embodiment of the present disclosure includes features and aspects that assist a surgeon in locating at least one reference feature, which can then be used in one or more stages of a surgical procedure. In certain embodiments, the actual instruments fabricated using the present disclosure may include one or more references (e.g., a model references). The one or more model instruments may use the one or more references to position and/or orient the one or more model instruments such that other steps of a surgical procedure can be performed in relation to those one or more model instruments and/or model references. Certain model references may key off or related to anatomical references of modeled anatomical body parts. The reference feature(s) correspond to the model references and together enable a surgeon to identify reference features on actual anatomy of a patient for a surgical procedure. 222 Added by DJM Jan 2024 1/3/24, 4:24 AM
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TMC-PAT-4 In certain embodiments, one or more fasteners deployed in an instrument such as a resection guide can serve as reference features, for an initial stage of the surgical procedure and/or for subsequent stages of the surgical procedure. In certain embodiments, a bone engagement feature can serve as a reference feature for an osteotomy system and/or surgical procedure. 223 Added by DJM Jan 2024 1/3/24, 4:24 AM

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