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"Mechanical axis" refers to an axis of a long bone such as a femur or tibia. The mechanical axis of a long bone is a straight line connecting the joint center points of the proximal and distal joint regions, whether in the frontal or sagittal plane. A mechanical axis can be useful in defining how the mechanical (weight, gait, flexion, extension, etc.) forces impact the morphology of the bone structure. A mechanical axis and anatomical axis can both help in the surgical planning in relation to deformed bones. (Search "axes of the long bones" on appropedia.com; Amit Dinanath Maurya, OpenSurgiSim (2021–2023). "Axes of the long bones - Mechanical and Anatomical". SELF. Modified. Accessed June 28, 2023.) |
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As used herein, a “drive”, "drive feature", or "drive recess" refers to an apparatus, instrument, structure, member, device, component, system, or assembly structured, organized, configured, designed, arranged, or engineered to receive a torque and transfer that torque to a structure connected or coupled to the drive. At a minimum, a drive is a set of shaped cavities and/or protrusions on a structure that allows torque to be applied to the structure. Often, a drive includes a mating tool, known as a driver. For example, cavities and/or protrusions on a head of a screw are one kind of drive and an example of a corresponding mating tool is a screwdriver, that is used to turn the screw, the drive. Examples of a drive include but are not limited to screw drives such as slotted drives, cruciform drives, square drives, multiple square drives, internal polygon, internal hex drives, penta lobular sockets, hex lobular sockets, combination drives, external drives, tamper-resistant drives, and the like. (Search 'list of screw drives' on Wikipedia.com March 12, 2021. Modified. Accessed March 19, 2021.) |
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"Thread" or "threads" refers to a helical structure used to convert between rotational and linear movement or force. A thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the ridge wrapped around the cylinder being called a straight thread and the ridge wrapped around the cone called a tapered thread. Straight threads or tapered threads are examples of external threads, also referred to as male threads. Threads that a correspond to male threads are referred to as female threads and are formed within the inside wall of a matching hole, passage, or opening of a nut or substrate or other structure. A thread used with a fastener may be referred to as a screw thread and can be an important feature of a simple machine and also as a threaded fastener. The mechanical advantage of a threaded fastener depends on its lead, which is the linear distance the threaded fastener travels in one revolution. (Search 'screw thread' on Wikipedia.com July 17, 2022. Modified. Accessed Aug. 1, 2022.) |
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"Cutting tool" refers to any tool that can be used to cut or resect another object. In particular, a cutting tool can refer to a manual or power tool for cutting or resecting tissue of a patient. Examples of cutting tools include, but are not limited to, a burr, an oscillating saw, a reciprocating saw, a grater saw, a drill, a mill, a side-cutting burr, or the like. |
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Exemplary embodiments of the disclosure will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. It will be readily understood that the components, as generally described and illustrated in the Figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the apparatus, system, and method is not intended to limit the scope of the disclosure but is merely representative of exemplary embodiments. |
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The phrases "connected to," "coupled to" and "in communication with" refer to any form of interaction between two or more entities, including mechanical, electrical, magnetic, electromagnetic, fluid, and thermal interaction. Two components may be functionally coupled to each other even though they are not in direct contact with each other. The term "abutting" refers to items that are in direct physical contact with each other, although the items may not necessarily be attached together. The phrase "fluid communication" refers to two features that are connected such that a fluid within one feature can pass into the other feature. |
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The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated. |
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Standard medical planes of reference and descriptive terminology are employed in this disclosure. While these terms are commonly used to refer to the human body, certain terms are applicable to physical objects in general. A standard system of three mutually perpendicular reference planes is employed. A sagittal plane divides a body into right and left portions. A coronal plane divides a body into anterior and posterior portions. A transverse plane divides a body into superior and inferior portions. A mid-sagittal, mid-coronal, or mid-transverse plane divides a body into equal portions, which may be bilaterally symmetric. The intersection of the sagittal and coronal planes defines a superior-inferior or cephalad-caudal axis. The intersection of the sagittal and transverse planes defines an anterior-posterior axis. The intersection of the coronal and transverse planes defines a medial-lateral axis. The superior-inferior or cephalad-caudal axis, the anterior-posterior axis, and the medial-lateral axis are mutually perpendicular. |
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Anterior means toward the front of a body. Posterior means toward the back of a body. Superior or cephalad means toward the head. Inferior or caudal means toward the feet or tail. Medial means toward the midline of a body, particularly toward a plane of bilateral symmetry of the body. Lateral means away from the midline of a body or away from a plane of bilateral symmetry of the body. Axial means toward a central axis of a body. Abaxial means away from a central axis of a body. Ipsilateral means on the same side of the body. Contralateral means on the opposite side of the body from the side which has a particular condition or structure. Proximal means toward the trunk of the body. Proximal may also mean toward a user, viewer, or operator. Distal means away from the trunk. Distal may also mean away from a user, viewer, or operator. Dorsal means toward the top of the foot or other body structure. Plantar means toward the sole of the foot or toward the bottom of the body structure. |
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Antegrade means forward moving from a proximal location/position to a distal location/position or moving in a forward direction. Retrograde means backward moving from a distal location/position to a proximal location/position or moving in a backwards direction. Sagittal refers to a midline of a patient’s anatomy, which divides the body into left or right halves. The sagittal plane may be in the center of the body, splitting it into two halves. Prone means a body of a person lying face down. Supine means a body of a person lying face up. |
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As used herein, “coupling”, “coupling member”, or "coupler" refers to a mechanical device, apparatus, member, component, system, assembly, or structure, that is organized, configured, designed, arranged, or engineered to connect, or facilitate the connection of, two or more parts, objects, or structures. In certain embodiments, a coupling can connect adjacent parts or objects at their ends. In certain embodiments, a coupling can be used to connect two shafts together at their ends for the purpose of transmitting power. In other embodiments, a coupling can be used to join two pieces of rotating equipment while permitting some degree of misalignment or end movement or both. In certain embodiments, couplings may not allow disconnection of the two parts, such as shafts during operation. (Search "coupling" on Wikipedia.com July 26, 2021. CC-BY-SA 3.0 Modified. Accessed July 27, 2021.) A coupler may be flexible, semiflexible, pliable, elastic, or rigid. A coupler may join two structures either directly by connecting directly to one structure and/or directly to the other or indirectly by connecting indirectly (by way of one or more intermediary structures) to one structure, to the other structure, or to both structures. |
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"Patient specific" refers to a feature, an attribute, a characteristic, a structure, function, structure, device, guide, tool, instrument, apparatus, member, component, system, assembly, module, or subsystem or the like that is adjusted, tailored, modified, organized, configured, designed, arranged, engineered, and/or fabricated to specifically address the anatomy, physiology, condition, abnormalities, needs, or desires of a particular patient or surgeon serving the particular patient. In one aspect, a patient specific attribute or feature is unique to a single patient and may include features unique to the patient such as a number of cut channels, a number of bone attachment features, a number of bone engagement surfaces, a number of resection features, a depth of one or more cutting channels, an angle for one or more resection channels, a surface contour, component position, component orientation, a trajectory for an instrument, implant, or anatomical part of a patient, a lateral offset, and/or other features. |
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"Patient-specific instrument" refers to an instrument, implant, or guide designed, engineered, and/or fabricated for use with a specific patient. In one aspect, a patient-specific instrument is unique to a patient and may include features unique to the patient such as a surface contour or other features. |
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"Patient-specific positioning guide" or “Patient-specific positioner” refers to an instrument, implant, positioner, structure, or guide designed, engineered, and/or fabricated for use as a positioner with a specific patient. In one aspect, a patient-specific positioning guide is unique to a patient and may include features unique to the patient such as patient-specific offsets, translation distances, openings, angles, orientations, anchor a surface contour or other features. |
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"Patient-specific cutting guide" refers to a cutting guide designed, engineered, and/or fabricated for use with a specific patient. In one aspect, a patient-specific cutting guide is unique to a patient and may include features unique to the patient such as a surface contour or other features. |
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"Patient-specific resection guide" refers to a guide designed, engineered, and/or fabricated for use in resection for a specific patient. In one aspect, a patient-specific resection guide is unique to a patient and may include features unique to the patient such as a surface contour or other features. |
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"Patient-specific trajectory guide" refers to a trajectory guide designed, engineered, and/or fabricated for use with a specific patient. In one aspect, a patient-specific trajectory guide is unique to a single patient and may include features unique to the patient such as a surface contour or other features. |
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"Patient specific instrument" (PSI) refers to a structure, device, guide, tool, instrument, apparatus, member, component, system, assembly, module, or subsystem that is adjusted, tailored, modified, organized, configured, designed, arranged, engineered, and/or fabricated to specifically address the anatomy, physiology, condition, abnormalities, needs, or desires of a particular patient. In certain aspects, one patient. In one aspect, a patient specific instrument is unique to a single patient and may include features unique to the patient such as a surface contour, component position, component orientation, and/or other features. In other aspects, one patient specific instrument may be useable with a number of patients having a particular class of characteristics. |
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As used herein, “tunnel” refers to a duct, an opening, a void, a passage, or other channel in a body or structure of an apparatus, instrument, structure, part, bone, member, device, component, system, or assembly. In certain embodiments, a tunnel is narrower and longer than the tunnel is wide. A tunnel can have a variety of shapes and/or cross-sections and may be straight or include curves or bends. In certain embodiments, a tunnel may have a circular cross section. In certain embodiments, a tunnel may extend partially into, or wholly through a body or structure. Where a tunnel extends partially into a body or structure, the tunnel may also be referred to as an opening, a cave, or the like. |
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As used herein, an "indicator" refers to an apparatus, device, component, system, assembly, mechanism, hardware, software, firmware, circuit, module, set of data, text, number, code, symbol, a mark, or logic structured, organized, configured, programmed, designed, arranged, or engineered to convey information or indicate a state, condition, mode, context, location, or position to another apparatus, device, component, system, assembly, mechanism, hardware, software, firmware, circuit, module, and/or a user of an apparatus, device, component, system, assembly, mechanism, hardware, software, firmware, circuit, module that includes, or is associated with the indicator. The indicator can include one or more of an audible signal, a token, a presence of a signal, an absence of a signal, a tactile signal, a visual signal or indication, a visual marker, a visual icon, a visual symbol, a visual code, a visual mark, and/or the like. In certain embodiments, "indicator" can be used with an adjective describing the indicator. For example, a "mode indicator" is an indicator that identifies or indicates a mode. |
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