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As used herein, a “knuckle threads” or "round threads" refers to a type of screw thread having a rounded thread form. The rounded thread form results in a space between the rounded crests and roots. This space provides space for material or debris to be shifted to not interfere with the thread and engaged within the space. This thread form is resistant to debris and thread damage. (Search 'knuckle thread' on Wikipedia.com Jan. 23, 2021. Modified. Accessed Aug. 17, 2021.) |
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The mechanical advantage of a screw thread depends on its lead, which is the linear distance the screw travels in one revolution. In general, the lead of a screw thread may be selected so that friction is sufficient to prevent linear motion or force from being converted to rotary, that is so the screw does not slip or disengage even when linear force is applied, as long as no external rotational force is present. A “length of thread engagement” refers to a distance that one set of threads (external or internal) engages another set of one or more threads (external or internal). The tightening of a fastener's screw thread is comparable to driving a wedge into a gap until the wedge sticks fast through friction and slight elastic deformation. (Search 'screw thread' on Wikipedia.com July 16, 2021. Modified. Accessed Aug. 17, 2021.) |
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The theoretical triangle shape for the thread form can be truncated to varying degrees (that is, the tip of the triangle is cut short). A V-thread in which there is no truncation (or a minuscule amount considered negligible) is called a sharp V-thread. Truncation occurs (and is codified in standards) for practical reasons. |
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External screw threads are those formed on an external surface of a structure, such as a cylinder or cone shaped structure. Internal screw threads are those formed on an internal wall or surface of a nut, substrate, or opening. The cross-sectional shape of a thread is often called its form or threadform (also spelled thread form). The thread form may be square, triangular, trapezoidal, or other shapes. The terms form and threadform can refer to other design aspects taken together (cross-sectional shape, pitch, and diameters) in addition to cross-sectional shape, but commonly refer to the standardized geometry used by the screw. Major categories of threads include machine threads, material threads, and power threads. Generally, triangular threadforms are based on an isosceles triangle. These threadforms are usually called V-threads or vee-threads because of the shape of the letter V. For 60° V-threads, the isosceles triangle is, more specifically, equilateral. For buttress threads, the triangle is scalene. |
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As used herein, a “thread” or "screw thread" refers to a helical structure used to convert between rotational and linear movement or force and/or to connect or engage two structures. A screw thread can be a ridge that wraps around a cylinder in the form of a helix, referred to as a straight thread. A screw thread can also be a ridge that wraps around a cone shape, referred to as a tapered thread. A screw thread is a feature of a screw as a simple machine and also in use as a threaded fastener. A screw thread can provide one or both of the following functions: conversion of rotary motion or force into linear motion or force and preventing or mitigating linear motion or force without corresponding rotation motion or force. In certain implementations of screw threads that convert a rotation force or torque into linear motion, or vice versa, the screw threads may be referred to as drive threads because of the drive function rotating the threads serves to extend or retract a structure linearly. |
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As used herein, a "shaft" refers to a long narrow structure, device, component, member, system, or assembly that is structured, organized, configured, designed, arranged, or engineered to support and/or connect a structure, device, component, member, system, connected to each end of the shaft. Typically, a shaft is configured to provide rigid support and integrity in view of a variety of forces including tensile force, compression force, torsion force, shear force, and the like. In addition, a shaft can be configured to provide rigid structural support and integrity in view of a loads including axial loads, torsional loads, transverse loads, and the like. A shaft may be oriented and function in a variety of orientations including vertical, horizontal, or any orientation between these and in two or three dimensions. A shaft may be made from a variety of materials including, but not limited to, metal, plastic, ceramic, wood, fiberglass, acrylic, carbon, biocompatible materials, biodegradable materials or the like. A shaft may be formed of any biocompatible materials, including but not limited to biocompatible metals such as Titanium, Titanium alloys, stainless steel, carbon fiber, combinations of carbon fiber and a metallic alloy, stainless steel alloys, cobalt-chromium steel alloys, nickel-titanium alloys, shape memory alloys such as Nitinol, biocompatible ceramics, and biocompatible polymers such as Polyether ether ketone (PEEK) or a polylactide polymer (e.g. PLLA) and/or others, or any combination of these materials. |
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As used herein, a "driver" refers to a mechanical piece, component, or structure for imparting motion to another piece, component, or structure. ("driver." Merriam-Webster.com. Merriam-Webster, 2021. Web. 6 Jan. 2021. Modified.) In certain embodiments, a driver can be a wheel configured or connected to other parts such that rotation or motion of the driver causes motion of other interconnected or intercoupled parts of a component, system, apparatus, or device. |
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As used herein, a “drive”, "drive feature", or "drive recess" refers to an apparatus, instrument, structure, 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 on 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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As used herein, a "thumb screw" refers to a type of fastener or screw designed and configured to be tightened, loosened, attached or detached using a person's fingers, such as a thumb and forefinger. In certain embodiments, a thumb screw may include a knob or button or wheel configured to grasped and rotated by an operator to tighten, loosen, attach or detach the thumb screw. |
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As used herein, a “plate” refers to a flat structure. In certain embodiments, a plate can be configured to support a load. In certain embodiments, a plate may comprise a generally planar structure. A plate can be a separate structure connected to, or integrated with, another structure. Alternatively, a plate can be connected to part of another structure. A plate can be two-dimensional or three-dimensional and can have a variety of geometric shapes and/or cross-sectional shapes, including, but not limited to a rectangle, a square, or other polygon, as well as a circle, an ellipse, an ovoid, or other circular or semi-circular shape. A plate can be made from a variety of materials including, metal, plastic, ceramic, wood, fiberglass, or the like. One plate may be distinguished from another based on where the plate is positioned within a structure, component, or apparatus. For example, an “upper plate” can include a plate positioned on, near, or integrated with, a structure such that the plate is at, or near, a top of the structure. Similarly, a “lower plate” can include a plate positioned on, near, or integrated with, a structure such that the plate is at, or near, a bottom of the structure. |
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The method of example 59 wherein advancing the locking member comprises actuating an inserter to press the locking member in a first direction while applying a counterforce to the proximal member in a second direction opposite the first direction, and wherein separating the proximal member and anchor comprises further actuating the inserter to break the frangible connection. |
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The method of example 58 wherein a proximal member is joined to the proximal end of the anchor by a frangible connection, the proximal member housing the locking member, the step of advancing the locking member comprising pressing the locking member from the proximal member into the longitudinal passage, the method further comprising after advancing the locking member, separating the proximal member and anchor at the frangible connection. |
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The method of example 54 further comprising advancing a locking member in the longitudinal passage to secure the suture within the longitudinal passage. |
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The method of example 54 further comprising passing the second portion alongside an outer surface of the anchor in a distal to proximal direction. |
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splitting the tube to free the suture laterally from the tube. |
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placing the tube and first portion of the suture through a portal in the patient’s body; |
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passing the first portion of the suture through a tube; |
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pulling on the first portion of the suture to move the knot nearer to the soft tissue. |
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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 or in communication with each other even though they are not in direct contact with each other. |
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a drive shaft having a proximal end and a distal end; |
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