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PER-12 In certain embodiments, the position of the vertex 2102 may be customized to a particular patient. The vertex 2102 position may be patient-specific. Alternatively, or in addition, the position of the vertex 2102 may be set at a default predetermined offset 2112, such as one millimeter. In another embodiment, the position of the vertex 2102 may be predetermined, for example due to the type of osteotomy being performed. 339 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In one embodiment, the position of the vertex 2102 may be fixed due to the type of osteotomy to be performed. Those of skill in the art will appreciate that with a fixed position of the vertex 2102 and based on a thickness of the bone at the location for the osteotomy, the size of the wedge angle 2104 can directly impact the width of the body 2028. Those of skill in the art will appreciate that the size of the wedge angle 2104 can vary depending on the needs of the patient, surgeon preferences, anatomical data, or the like. In one embodiment, the wedge angle 2104 may range from between about 5.0 degrees to about 45.0 degrees. In one embodiment, the wedge angle 2104 is about 13.4 degrees. In another embodiment, the wedge angle 2104 is about 18.3 degrees. Advantageously, a user or surgeon can define and/or adjust the wedge angle 2104 in a tool that views and/or edits parameters for the bone model and/or for a model of the resection guide 2020. In one embodiment, the wedge angle 2104 is determined based on the bone model. 340 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Figure 21J also illustrates a one fastener 2010 secured within a first bone attachment feature 2024a. The first bone attachment feature 2024a secures the resection guide 2020 to a portion of the bone during an osteotomy. The bone attachment feature 2024 secures the resection guide 2020a to a portion of the bone that forms the wedge bone fragment 2050 after formation of a wedge osteotomy. As described herein, the osteotomy system 2000 may include a second bone attachment feature 2024b that can be used to secure the resection guide 2020a to the bone. In one embodiment, the first bone attachment feature 2024a and second bone attachment feature 2024b include fasteners 2010 that enter the bone in parallel to each other, to facilitate removal of the resection guide 2020a while leaving the fasteners 2010 in the bone. In the illustrated embodiment, the fasteners 2010 in the first bone attachment feature 2024a and second bone attachment feature 2024b both enter the portion of the bone that becomes the wedge bone fragment 2050. With the fasteners 2010 in the wedge bone fragment 2050, the wedge bone fragment 2050 can be readily manipulated and/or removed during a surgical procedure. 341 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Advantageously, embodiments of the present disclosure enable a user (e.g., a technician, and/or a surgeon) to visualize and work with the bone model as well as a model of the resection guide 2020 before the resection guide 2020 is fabricated. Accordingly, a user can identify and measure the effects of one or more osteotomies formed using the resection guide 2020 along the first trajectory 2042 and/or the second trajectory 2044. In addition, a user can change the first trajectory 2042, the second trajectory 2044, the positions of the posterior resection feature 2022a and/or the anterior resection feature 2022b relative to each other (in one, two, or three planes), and a variety of other aspects of the resection guide 2020 and/or the osteotomy system 2000 before instruments are fabricated and used on patient. Thus, a user can design and/or revise the resection guide 2020 and its characteristics and features to accomplish a customized surgical procedure and/or outcome for the patient. 342 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Referring back to Figures 11, 12, and/or 17, the embodiments of the present disclosure may use one or more bone models (e.g., bone model 1204) in determining, partially determining, and/or as a factor in identifying, positioning, selecting, orienting, and/or defining components of the osteotomy systems. Those of skill in the art will appreciate that the accuracy of and/or fidelity of the bone model can vary depending on the technology and/or equipment used to capture and/or process the medical imaging. Consequently, in one embodiment, the accuracy and fidelity and/or quality of the medical imaging and/or processing to generate a three dimensional bone model may result in a bone model having each of the same features as the corresponding bone of a patient such that bone model 1204 may match or substantially may match the anatomy of a patient’s foot. In another embodiment, the accuracy and fidelity and/or quality of the medical imaging and/or processing to generate a three dimensional bone model may be such that the accuracy, fidelity, and/or quality may be less than the highest. In such an instance, the bone model 1204 may resemble or significantly resemble the anatomy of a patient’s foot. This may mean that certain features and/or aspects are exactly the same while others are similar but not actually the same as corresponding features on bone(s) of the patient. 343 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Furthermore, those of skill in the art will appreciate that the bone model 1204 may model a portion of a single bone of a patient. Alternatively, or in addition, the bone model 1204 may model all or substantially all of a single bone of a patient. Alternatively, or in addition, the bone model 1204 may model a plurality of bones of a patient. 344 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Referring now to Figure 21J, the resection guide 2020a can be used for a surgical procedure on a calcaneus 224, or another bone, of a patient. The resection guide 2020a may include at least one bone attachment feature. In one embodiment, a user may secure the resection guide 2020a to the calcaneus 224 by deploying at least one fastener 2010 through the at least one bone attachment feature and into the calcaneus 224. 345 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In the illustrated embodiment, the resection guide 2020a includes a posterior resection feature 2022a and an anterior resection feature 2022b. The posterior resection feature 2022a is configured to guide a cutting tool to form a first osteotomy 2046. The anterior resection feature 2022b is configured to guide a cutting tool (which may be the same cutting tool) to form a second osteotomy 2048. 346 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 The posterior resection feature 2022a extends through the resection guide 2020a from the lateral side 2030 to the medial side 2032 along the first trajectory 2042. The first trajectory 2042 is at least partially determined based on a calcaneus model of at least a portion of a calcaneus of a patient’s foot. The calcaneus model is based on medical imaging of the patient’s foot and is configured to resemble, significantly resemble, and/or match the anatomy of the patient’s foot. Alternatively, or in addition, the anterior resection feature 2022b extends through the resection guide 2020 from the lateral side 2030 to the medial side 2032 along the second trajectory 2044. The second trajectory 2044 is at least partially determined based on the calcaneus model of at least a portion of the calcaneus 224 of the patient’s foot. 347 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In the illustrated embodiment, the second osteotomy 2048 connects with the first osteotomy 2046 to form a wedge bone fragment 2050. Advantageously, the wedge bone fragment 2050 is connected to the at least one fastener 2010. This connection enables a surgeon to readily remove and/or manipulate the wedge bone fragment 2050, as needed. 348 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In certain embodiments, a posterior resection feature 2022a may extend from a lateral side 2030 to a medial side 2032 at a posterior angle 2052, the posterior angle 2052 may be an angle measured in degrees from an axis 2054 parallel to a lateral side 2030 of the body 2028 to the first trajectory 2042. An anterior resection feature 2022b may extend from a lateral side 2030 to a medial side 2032 at an anterior angle 2056, the anterior angle 2056 may be an angle measured in degrees from the axis 2054 to the second trajectory 2044. 349 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 The posterior angle 2052 may be determined, at least partially, based on a calcaneus model derived from medical imaging of a calcaneus of a patient’s foot. In one embodiment, the calcaneus model is configured to significantly resemble the anatomy of the patient's foot. The anterior angle 2056 may be determined based on the calcaneus model. Furthermore, the anterior angle 2056 may be determined such that an osteotomy formed by way of the posterior resection feature 2022a and the anterior resection feature 2022b forms a wedge osteotomy. The wedge osteotomy includes a wedge bone fragment 2050. In certain embodiments, the wedge bone fragment 2050 may be determined, at least partially, based on the calcaneus model. 350 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Referring still to Figure 21J, in one embodiment, the resection guide 2020a includes at least one bone attachment feature that may be configured to receive at least one fastener 2010. The fastener 2010 may engage a portion of the calcaneus before formation of the wedge osteotomy. Advantageously, the fastener 2010 may extend into the calcaneus such that the fastener 2010 does not interfere with the wedge osteotomy, but the fastener 2010 also engages the wedge bone fragment 2050 after formation of the wedge osteotomy. 351 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Those of skill in the art will appreciate that the posterior resection feature 2022a and/or anterior resection feature 2022b can have a variety of different designs and may be similar to each other or different from each other. In the illustrated embodiment, the resection features 2022 have a similar mirrored configuration, one for the posterior resection feature 2022a and one for the anterior resection feature 2022b. Generally, resection features 2022 include openings that may also be referred to as slots, channels, or the like. Likewise, the posterior resection feature 2022a and/or anterior resection feature 2022b may have the same or similar or different opening configurations. 352 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In the illustrated embodiment, the posterior resection feature 2022a includes a posterior dorsal slot 2058, a posterior plantar slot 2060, and a posterior bridge 2062. In certain embodiments, the posterior dorsal slot 2058 and a posterior plantar slot 2060 have a similar height, width, and depth. The anterior resection feature 2022b includes an anterior dorsal slot 2064, an anterior plantar slot 2066, and an anterior bridge 2068. In certain embodiments, the anterior dorsal slot 2064 and an anterior plantar slot 2066 have a similar height, width, and depth. 353 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 The posterior dorsal slot 2058 may include an open dorsal end 2070 and a closed plantar end 2072. The posterior plantar slot 2060 may include an open plantar end 2074 and a closed dorsal end 2076. The anterior dorsal slot 2064 may include an open dorsal end 2078 and a closed plantar end 2080. The anterior plantar slot 2066 may include an open plantar end 2082 and a closed dorsal end 2084. In the illustrated embodiment, the posterior bridge 2062 is positioned between the posterior dorsal slot 2058 and the posterior plantar slot 2060. In one embodiment, the posterior bridge 2062 may form the closed plantar end 2070 of the posterior dorsal slot 2058 and the closed dorsal end 2074 of the posterior plantar slot 2060. In one embodiment, the anterior bridge 2068 is positioned between anterior dorsal slot 2064 and the anterior plantar slot 2066. The anterior bridge 2068 can form the closed plantar end 2080 of the anterior dorsal slot 2064 and the closed dorsal end 2084 of the anterior plantar slot 2066. 354 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Advantageously, the resection features 2022 can be positioned, sized, and/or oriented to enable a surgeon to resect any particular shape in the bone for the osteotomy procedure. In the illustrated embodiment, the resection features 2022 are configured to direct a cutting tool at an angle into the bone such that a wedge is resected. Advantageously, the size, shape, and angle of the wedge can be predefined and can be determined preoperatively and can be patient-specific. In this manner, the resection guide 2020a serves to provide for a patient-specific osteotomy procedure. Alternatively, or in addition, the resection features 2022 can be configured to enable a surgeon to readily resect in a plantar direction and/or a dorsal direction. In the illustrated embodiment, the resection features 2022 include an opening on one end to permit the surgeon to position a cutting tool to make desired cuts that can extend all the way to dorsal and/or plantar surfaces of the bone. 355 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Advantageously, the illustrated embodiment the resection features 2022 include open ends (e.g., open dorsal end 2070, open plantar end 2074, open dorsal end 2078, and open plantar end 2082). The open ends end able a surgeon to manipulate or tilt a cutting tool from a normal orientation relative to the slot to an angled position that moves the cutting tool out past the perimeter of the resection guide 2020a. For example, a surgeon can insert a cutting tool in posterior dorsal slot 2058 and cut bone below the posterior dorsal slot 2058. In addition, the surgeon can angle the cutting tool in a plantar direction and the posterior dorsal slot 2058 guides the cutting tool to cut outside the perimeter of the resection guide 2020a. In particular, moving the cutting tool in a plantar direction enables a cutting blade of the cutting tool to cut bone dorsal to, but still aligned with the posterior dorsal slot 2058. In this manner, the surgeon can create an osteotomy that extends dorsally beyond a dorsal cortex of the bone. Similarly, and in like manner, the open plantar end 2074, open dorsal end 2078, and/or open plantar end 2082 enable the surgeon to form an osteotomy that reaches to the other dorsal and/or plantar surfaces of the bone. These open ends allow the resection guide 2020 to be smaller (not as long along its longitudinal axis) such that smaller incisions are needed for use. 356 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 In the illustrated embodiment, the posterior bridge 2062 is aligned horizontally with the anterior bridge 2068. However, those of skill in the art will appreciate that the posterior bridge 2062 and anterior bridge 2068 may be unaligned in other embodiments. Furthermore, those of skill in the art appreciate that the posterior resection feature 2022a and/or anterior resection feature 2022b may have a variety of configurations, including a single slot with a closed plantar end and an opposite open dorsal end, a single slot with an open plantar end and an opposite closed dorsal end, a single slot with a closed plantar end and a closed opposite dorsal end, or the like. 357 Added by DJM Jan 2024 1/6/24, 10:03 PM
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PER-12 Referring still to Figure 21J, the resection guide 2020a can include a plantar landmark registration feature 2041a and a handle 2026 (not shown due to cross section, see Figures 22A-22I), the a plantar landmark registration feature 2041a extends from a plantar side 2040 of the body 2028 and is configured to contact a plantar surface of the calcaneus 224. Alternatively, or in addition, the resection guide 2020a can include a bone engagement surface 2033 on the medial side 2032 of the body 2028. The bone engagement surface 2033 is configured to resemble, substantially resemble, or match a contour of the calcaneus when the body 2028 is positioned on the calcaneus 224. In one embodiment, the resection guide 2020a may include a handle 2026 that extends from a dorsal side 2038 of the body 2028. 358 Added by DJM Jan 2024 1/6/24, 10:03 PM

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