Adjustable strut assemblies for external fixation systems

Abstract

To provide length-adjustable strut assemblies for external fixation systems, and corresponding external fixation systems.SOLUTION: Strut assemblies 10 include an elongate first and second end members 12, 14, an elongate intermediate member 16, and first and second adjustment mechanisms. The intermediate member comprises a threaded rod fixedly coupled into an axial cavity of the member, and is rotatably fixed and axially translatable within an axial cavity of the first end member. An end portion of the second end member is received in the axial cavity of the intermediate member, and the second end member comprises an axial cavity threadably coupled to the threaded rod. The first adjustment mechanism is configured to selectively axially fix the intermediate member relative to the first end member. The second adjustment mechanism is configured to selectively rotate the second end member with respect to the threaded rod to axially translate the second end member relative to the intermediate member.SELECTED DRAWING: Figure 1

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a joint venture of “Struts and Strut Assemblies for Exte This application is based on U.S. Provisional Patent Application No. 62 / 724,462 entitled "Rinal Bone Fixation Systems" The entire contents of this provisional patent application are hereby incorporated by reference in their entirety. The bodies are expressly incorporated herein. [Technical field]

[0002] The present disclosure relates generally to posts for external fixation systems and related methods. The present disclosure provides an externally fixed sling that provides relatively quick length adjustment over a relatively wide length adjustment range. The present invention relates to an adjustable support assembly for a positioning system and related methods. [Background technology]

[0003] External fixation devices allow bone or tissue fragments to be aligned in the desired relative positions based on the specific clinical need. Positioning and orienting the devices in a relative position and orientation, and adjusting their relative position and orientation External fixation devices have been used to treat bone and tissue conditions. One form is the hexapod type fixed device. Hexapod type device, or formal name The Stewart Platform is a six degree of freedom (6DOF) parallel manipulator or Generally, these devices are designed to measure the object in all three orthogonal directions. Axial translation (X, Y, Z position) and rotation around all three orthogonal axes (ro Other types of external fixation devices have the ability to operate in various positions (roll, pitch, and yaw attitudes). , using less than six posts or more than six posts.

[0004] External fixation systems also typically include a pair of bases that serve as the base for bone fixation. The base also typically has six supports extending between the bases. The support and base are usually connected to each other to allow three different rotations around three orthogonal axes. These supports are connected via spherical or cardan joints that allow for length adjustment. However, the minimum and / or maximum lengths may not meet the needs of a particular clinical situation. For example, it may be necessary to set the distance between foundations to a shorter distance than can be achieved with a particular support. To minimize the distance, shorter struts must be used, but shorter struts of course have a higher support capacity. Limits the adjustment range (i.e. maximum length) of the columns.

[0005] As a result, current hexapod bone fixation systems require the bases to be close together. "Short" posts for use when there is a need for the bases to be spaced farther apart Various lengths (i.e., various length ranges) to provide "long" posts for use when In many instances, these struts are used during the bone or tissue correction process. The struts must be replaced with the next length, so that they are gradually longer or shorter. This correction process is It takes a lot of time and is expensive if the poles being replaced cannot be reused. Further complicating such a system is the fact that, in some cases, This means that different lengths of support are required depending on the initial In cases where rotation is present, struts of different lengths are usually required. The task of selecting the correct combination of struts of various lengths for a surgical procedure is typically performed in a trial setting in the operating room. Such systems and situations are ultimately time-consuming and often done by mistake. As a result, it also requires excess inventory, which is costly and disruptive to use properly. This is often the case.

[0006] Physically modifying the support, apart from being cumbersome, is an emergency method of correcting the deformation. It also limits the available range of motion of the system when attempting recovery. While emergency correction is performed and maintenance of the reduction is left to the operating room staff, Until another member of the operating room staff can select which post fits between the bases in the new position, Supports are not normally added, as this process takes a lot of time and requires a lot of inventory. .

[0007] Current hexapod-type fastening systems also typically include a support between the foundation and the support. Utilizing connections that require the use of one or more fasteners that must be tightened at times. The six posts are connected to the foundation at both ends (i.e. 12 connections) and, in some cases, Connecting by trial and error is a difficult and time-consuming task. The reason is that many current hexapod fastening systems must be applied with a tool. The main issue is the fact that these fasteners and tools utilize separate fasteners that must be In an operating room environment while the fixation system is in use, e.g., while attempting to maintain reduction. Create an even larger collection of parts and materials that must be kept track of.

[0008] Thus, it provides a wide range of length adjustment and is relatively quick and easy to connect, particularly to the base / user. a support assembly that is adjustable while being supported; A fastening system and related methods are desirable. Summary of the Invention

[0009] In one aspect, the present disclosure provides a strut assembly for an external fixation system for bone and / or tissue. The strut assembly includes an elongated tubular first end member and a first end member. a shaft that is rotationally fixed and axially translatable within the axial cavity; an elongated tubular intermediate member extending from the axial cavity out of the first end portion of the first end member; a second member received within the axial cavity of the intermediate member and extending from the axial cavity of the intermediate member; and an elongated tubular second end member extending beyond the distal end portion of the intermediate support. The column body is rotationally fixed to the inside of the first end member and axially translatably connected thereto. and extending axially from the first end member out of the first end portion of the first end member. The strut assembly is configured such that the intermediate member is free to translate axially within the first end member. and selectively axially displacing the first end member and the intermediate member. A first adjustment member provided on the first free end portion of the first end member configured to fix the first adjustment member. The support assembly is secured within the axial internal cavity of the intermediate member. The second member further includes a threaded rod having an axial cavity that is threaded within the cavity of the intermediate member. The rod is threadably engaged with the rod and extends axially from the cavity out the second end portion of the intermediate member. The assembly includes a second end member for axially translating the second end member relative to the intermediate member. a screw threaded rod for selectively rotating the intermediate member relative to the intermediate member and the screw rod; It further includes a second adjustment mechanism provided on the second free end portion.

[0010] In another aspect, the present disclosure provides a method for manufacturing a gyro sensor comprising: an elongated first end member, an elongated middle member, an elongated second end member, and a gyro sensor comprising: The external fixation system includes an end member, a first adjustment mechanism, and a second adjustment mechanism. The first end member includes a first end portion, a second end portion, and a first axial cavity extending from the second end portion. The intermediate member has a third end portion. a fourth end portion, a second axial cavity extending from the third end portion, and a second axial cavity extending from the fourth end portion. The intermediate member has a threaded rod fixedly connected within the opposed cavity of the first end member. the first axial cavity of the first axial member and the second axial member; The second end member extends from the axial cavity through a second end portion. The second end member has a fifth end portion, a The second end portion has a sixth end portion and a third axial cavity extending from the fifth end portion. At least a fifth end portion of the end member is received within the second axial cavity of the intermediate member. and the third axial cavity is threadedly engaged with the threaded rod of the intermediate member. The first adjustment mechanism extends from the axial cavity of the first end member through the fourth end portion. a second end portion having an intermediate member disposed therein and arranged to be free to move axially in parallel within the first axial cavity; and selectively allowing the intermediate member to move axially relative to the first end member. The second adjustment mechanism is configured to fasten the fourth free end portion of the intermediate member to the fourth free end portion of the intermediate member. and adapted to translate the second end member axially relative to the intermediate member. and a second end member configured to selectively rotate relative to the intermediate member and the threaded rod for There are.

[0011] In some embodiments, the first end portion of the first end member is attached to a first external fixation base. In some embodiments, the second end includes a first joint configured to couple to the first end of the first coupling. The sixth end portion of the member includes a second joint configured to couple to a second external mounting base. It is equipped with:

[0012] In some embodiments, the body portion of the first end member includes an axially extending slot. The intermediate member has a diameter extending from the first end member to the intermediate member and received within the slot of the first end member. The first end member is pivotally secured within an axial cavity of the first end member by a first pin extending in the axial direction. In some such embodiments, the first pin is coupled to the third end portion of the intermediate member. In some such embodiments, the first The pin is further connected to the threaded rod, and the threaded rod and the intermediate member are connected rotatably and axially in a fixed manner. In some such embodiments, the first pin is coupled to an end portion of the threaded rod. do.

[0013] In some embodiments, a second end portion received within the second axial cavity of the intermediate member. At least a fifth end portion of the member is radially disposed between the threaded rod and the body portion of the intermediate member. In some embodiments, the third axial cavity of the intermediate member includes an internal thread; The threaded rod has external threads which mesh with the internal threads of the third axial cavity.

[0014] In some such embodiments, the second terminal portion of the first end member includes external threads. the first adjustment mechanism includes a first end portion having internal threads that mesh with external threads on the second end portion. and when the first collar member is pivoted about the second end portion, The first collar translates axially along the second end portion. In an embodiment, the fastening portion of the first collar member axially engages the second end portion of the first end member. The first adjustment mechanism is disposed in a radial direction and has a tapered bearing surface. The intermediate member further includes a friction member disposed between the outer surface of the body portion of the intermediate member and the bearing surface. In some such embodiments, the first collar is attached to the first end portion along the second end portion. The friction member is supported by the bearing surface of the intermediate member by axial translation toward the The intermediate member is pressed radially against the outer surface of the body portion such that the intermediate member is selectively moved relative to the first end member. In some embodiments, the bearing surface is axially fixed from the second end portion. a surface that slopes toward the outer surface of the body portion of the intermediate member as the surface extends away from the intermediate member toward the outer surface of the body portion of the intermediate member; In some embodiments, the friction member includes a deformable ring member. In such an embodiment, the deformable ring member may include a segmented ring or a split ring. In some such embodiments, the outer surface of the body portion of the intermediate member provides increased friction. The surface has a texture that

[0015] In some such embodiments, the second adjustment mechanism is disposed at a fourth end portion of the intermediate member. A second collar member is provided which is axially fixed and pivotally connected to the second collar member. In such an embodiment, the body portion of the second end member includes an axially extending slot, The second collar member is connected to the second collar member and received within the slot of the second end member. and pivotally secured to the second end member by a radially extending second pin that is secured to the second end member. When the second collar member is pivoted about the fourth end portion, the second end member is moved relative to the intermediate member. The actuator is adapted to move in parallel in the axial direction.

[0016] In another aspect, the present disclosure provides a method for manufacturing a gyro-membrane-type ... and a plurality of struts extending between the struts, at least one of the struts being as described herein. An external fixation system for bone and / or tissue is provided that includes the disclosed strut assembly.

[0017] In some embodiments, more than one of the plurality of struts is a strut adapter as disclosed herein. In some embodiments, each of the plurality of struts comprises a septum as disclosed herein. In some embodiments, the plurality of struts includes six struts. In some embodiments, the first base is adapted to couple with a first bone and / or tissue of the patient. and the second scaffold is configured to couple with a second bone and / or tissue.

[0018] In some embodiments, the first end portion of the first end member is attached to a first external fixation base. In some embodiments, the second coupling is configured to couple to the first coupling. The sixth end portion of the end member is configured to be coupled to a second external fixation base. In some embodiments, the body portion of the first end member extends axially. a slot for inserting the intermediate member into the first end member; and a slot for inserting the intermediate member into the first end member. a first axial direction of the first end member by a first radially extending pin received within the first end member; It is pivotally fixed within the cavity and is axially translatable. In such an embodiment, the first pin is coupled to the third end portion of the intermediate member. In such an embodiment, the first pin is further coupled to the threaded rod, and the threaded rod and the intermediate In some embodiments, the first pin is a threaded member. It is connected to the end portion of the rod.

[0019] In some embodiments, a second end portion received within the second axial cavity of the intermediate member. At least a fifth end portion of the member is radially disposed between the threaded rod and the body portion of the intermediate member. In some such embodiments, the third axial cavity of the intermediate member includes an internal thread. and the threaded rod has an outer thread that meshes with the inner thread of the third axial cavity. .

[0020] In some such embodiments, the second terminal portion of the first end member includes external threads. the first adjustment mechanism having an internal thread that meshes with the external thread of the second end portion. The first collar member is pivoted about the second end portion. The first collar translates axially along the second end portion. In an embodiment, the fastening portion of the first collar member fastens the second end portion of the first end member. The first adjustment mechanism is disposed axially beyond the first adjustment mechanism and includes a tapered bearing surface. The intermediate member further includes a friction member disposed between the outer surface of the body portion of the intermediate member and the bearing surface. In some such embodiments, the first collar is aligned along the second end portion toward the first end. The friction member is moved axially in parallel to the intermediate member by the bearing surface. The intermediate member is forced radially against the outer surface of the body portion such that the intermediate member is forced against the first end member. In some such embodiments, the bearing surface is a second terminal As it extends axially away from the end portion it tapers toward the outer surface of the body portion of the intermediate member. In some such embodiments, the friction member comprises a deformable ring. In some such embodiments, the deformable ring member includes a segmented ring member. In some embodiments, the outer surface of the body portion of the intermediate member includes a split ring or a ring. It has a surface texture that increases friction.

[0021] In some embodiments, the second adjustment mechanism is axially secured to the fourth end portion of the intermediate member. Some such embodiments include a second collar member that is fixed to and pivotally connected to the second collar member. In an embodiment, the body portion of the second end member includes an axially extending slot, and the second collar The member is connected to the second collar member and is received within the slot of the second end member. A second collar is pivotally secured to the second end member by a second radially extending pin. The second end member is pivoted about the fourth end portion relative to the intermediate member. It is adapted to move in parallel in the axial direction. These and other objects, features, and advantages of the present disclosure are set forth in the following description of various aspects of the present disclosure. This will become apparent from the detailed description taken in conjunction with the accompanying drawings.

[0022] For purposes of illustrating the external bone fixation systems and related methods described herein, an illustrative example is provided. These illustrative embodiments demonstrate the precise implementation of the disclosed external fixation system. No limitations are intended as to configuration and operation, and other similar embodiments are contemplated. There are. [Brief description of the drawings]

[0023] [Figure 1]FIG. 2 is a front perspective view of an exemplary adjustable column assembly according to the present disclosure; [Diagram 2] FIG. 2 is a rear perspective view of the example adjustable post assembly of FIG. 1 in accordance with the present disclosure. [Diagram 3] FIG. 2 is a rear view of the example adjustable strut assembly of FIG. 1 in accordance with the present disclosure. [Figure 4] FIG. 2 is a side view of the example adjustable column assembly of FIG. 1 in accordance with the present disclosure. [Diagram 5] FIG. 2 is a front view of the example adjustable column assembly of FIG. 1 in accordance with the present disclosure. [Figure 6] 6 illustrates a vertical cross-section as shown in FIG. 5 of the exemplary adjustable column assembly of FIG. 1 in accordance with the present disclosure. [Figure 7] 7 is a partial enlarged view of the cross-sectional view of FIG. 6 illustrating the example adjustable strut assembly of FIG. 1 according to the present disclosure. [Figure 8] 8 is a partial enlarged view of the cross-sectional view of FIG. 7 illustrating the example adjustable strut assembly of FIG. 1 according to the present disclosure. [Figure 9] 8 is another enlarged partial view of the cross-sectional view of FIG. 7 illustrating the example adjustable post assembly of FIG. 1 according to the present disclosure. [Figure 10] 2 illustrates a top end view of the example adjustable column assembly of FIG. 1 in accordance with the present disclosure. [Figure 11] 2 illustrates a rear end view of the example adjustable strut assembly of FIG. 1 in accordance with the present disclosure. [Figure 12] FIG. 10 is a top perspective view of an exemplary external fixation system utilizing the exemplary strut assembly of FIGS. 1-9 in a first, relatively reduced configuration in accordance with the present disclosure. [Figure 13] 13 is a front view of the exemplary external fixation system of FIG. 12 in accordance with the present disclosure. [Figure 14] 13 is a side view of the exemplary external fixation system of FIG. 12 in accordance with the present disclosure. [Figure 15] 13 is a top view of the exemplary external fixation system of FIG. 12 in accordance with the present disclosure. [Figure 16] FIG. 16 is a top perspective view of the exemplary external fixation system of FIGS. 12-15 in a second, relatively expanded configuration in accordance with the present disclosure. [Figure 17]17 is a front view of the exemplary external fixation system of FIG. 16 in accordance with the present disclosure. [Figure 18] 17 is a side view of the exemplary external fixation system of FIG. 16 in accordance with the present disclosure. [Figure 19] 17 is a top view of the exemplary external fixation system of FIG. 16 in accordance with the present disclosure. Detailed Description

[0024] When describing elements of various embodiments of the present invention, the articles "a," "one," "one "An," "the," and "said" refer to one or more components. The term "comprising" is intended to mean "," "including," and "having" are non-exclusive. ve), and there may be additional components other than those listed. The examples of parameters are not exclusive of other parameters of the disclosed embodiments. The structures described, illustrated or otherwise disclosed herein with respect to any particular embodiment may be modified in any manner. Any components, aspects, features, configurations, arrangements, methods of use, etc. disclosed herein may be used interchangeably. It is equally applicable to other embodiments.

[0025] The present disclosure provides a method for manufacturing a base plate having a wide adjustment range and ... Quickly and easily adjust the settings manually while remaining connected to the port (and therefore to the user) To provide an adjustable length post assembly for an external fixation system, The present disclosure thereby further provides a method for manufacturing a support assembly 10, as shown in FIGS. The external fixation / parallel manipulator system 100 (for example, six degrees of freedom (6 The present invention provides a method and system for fixing a DOF (DoF) of a vehicle. In one embodiment, the external fixation system 100 may include at least one strut assembly 10. In some embodiments, the external fixation system 100 may include multiple post assemblies 10. In some embodiments, each post of the external fixation system 100 is attached to a post assembly 10. In some embodiments, the external fixation system 100 may comprise bone and / or tissue. It is a woven fastening system.

[0026] The strut assembly 10 results in an external fixation system 100 that is more flexible than conventional parallel fixation systems. It has the desired stability and mobility characteristics of a robotic manipulator system, but it is designed to be able to handle a lot of time. Selection of required strut length, strut length restrictions, and difficult strut disassembly and assembly are not involved. The strut assembly 10, and consequently one or more strut assemblies 10, can be The included fastening system 100 provides a relatively wide range of movement / adjustment (both coarse and fine adjustment ranges). 10, which eliminates the need to replace one or more strut assemblies 10 during the reduction / distraction process. In some embodiments, the number of times the strut assemblies are 10, and consequently a fastening system comprising one or more strut assemblies 10. The implant 100 is particularly advantageous for repairing fractures or deformities, such as fractures or deformities of relatively long bones.

[0027] In some embodiments, as shown in FIGS. 1-11, the strut assemblies 10 each include The first end member or strut body 12 is tubular and has an elongated shape in the axial direction, and the second end member or strut body 13 is tubular and has an elongated shape in the axial direction. A first end member or strut body 14 having a rectangular shape and a first end member 12 and A tubular intermediate portion that is long in the axial direction and connects the second end member 14 and extends between the two members. As will be explained further below, the assembly of the support structure is formed from a support body 16. The assembly 10 is secured within an intermediate member 16 and extends axially from a second end member 14. The intermediate member 16 further includes a threaded rod 18 threadedly engaged within the hollow space extending from the first end of the intermediate member 16. It is connected to the end of the strut body 12 so as to be axially translatable within an axially extending cavity of the strut body 12 . The strut assembly 10 has a longitudinal axis X-X as shown in FIGS. can be defined and the overall length of the assembly along the axis X-X can be adjusted (coarse adjustment The first and second end members 12, 14 are formed The axial ends of the strut assemblies are provided with first and second axial ends as shown in Figs. A second joint or connection mechanism 22, 24 may be provided. 22 and 24 are first and second external fixation systems 100 as shown in FIGS. Configured to couple to one of the foundations or base plates 120, 130 do.

[0028] As shown in FIGS. 12 to 19 , the first joint 22 is connected to a first base 120. , and the second joint 24 can be coupled to a second base 130 . In this manner, the phase of the intermediate member 16 within / along the first end member 12 axial arrangement relative to one another and / or within / along the intermediate member 16. The relative axial alignment of the two end members 14 is adjusted along the axis X-X of the strut assembly 10. For example, as shown in Figs. 10-13 in comparison with Figs. 14-17, The length adjustment of the strut assembly 10 and, as a result, the first and second bases 120, 13 0 and / or the distance and / or orientation may be provided.

[0029] The first and second bases 120, 130 are at least partially spaced around the opening and / or axis. (and potentially at least partially around bone and / or tissue when worn on the body) The plurality of strut assemblies 10 may be first and second struts or partial struts. The two bases 120, 130 can be connected to the bases around their axes and / or openings. For example, as shown in FIGS. 12-19, a plurality of strut assemblies 10 may be arranged in a first and second The support assemblies may be circumferentially disposed and connected to the bases 120, 130 of the respective support assemblies. 110 is connected to the first and second bases 120 and 130 via the first and second joints 22, , 24 at various locations around the axis and / or opening of the base. Therefore, the support assembly 10 is tilted with respect to the axes of the first and second bases 120, 130. It may be inclined.

[0030] As shown in FIGS. 12 to 19, the column assembly 10 includes a pair of coupling members 132. The first and second bases 120, 130 may be arranged and coupled thereto via the first and second bases 120, 130. Such a pair of column assemblies 10 (and joint members 132) are connected to the first and second bases. 120, 130 may be circumferentially arranged / spaced apart. Each pair of 10 has first and second electrodes arranged in alternating directions as shown in FIGS. The first and second bases 120, 130 can be connected to each other. Each pair of strut assemblies 10 connected to 30 have opposing axial and / or angular orientations. 12 to 19. Thus, one strut assembly 10 of a pair is angled (and positioned) clockwise toward the first Extendable from the base 120 via the first joint 22 to the second base 130 for connection and the other strut assembly 10 of the pair is rotated counterclockwise (and positioned) to the first position. The first base 120 can be extended and connected to the second base 130 via the second joint 24. It is possible.

[0031] The intermediate member 16 is adapted to be attached to a first end portion of the strut assembly 10 for coarse adjustment of the axial length of the strut assembly 10. The second end is selectively slidably axially adjustable within the cavity of the member 12. The member 14 has a first end for providing relatively fine adjustment of the axial length of the strut assembly 10. Within the cavity of the main member 12 and around a threaded rod 18 fixed within the cavity of the intermediate member 16. / Along the threaded rod, the screw can be selectively threadably and axially adjusted. The strut assembly 10 has a relatively wide range of adjustment and can be adjusted in various ways as shown in FIGS. Between the first and second base 120, 130 portions (as well as between the bone or tissue pieces connected to the bases) This relatively wide axial distance of the strut assembly 10 can be reduced or extended. A wide range of axial adjustment is provided without the need to replace or add strut assemblies 10. This advantageously saves the surgeon time and allows for the correction of orthopedic conditions and fractures and deformities. This allows for concentration and further reduces inventory requirements.

[0032] As shown in FIGS. 1-7 and described above, each of the struts 10 includes a first end member 12, a second end member 13, and a third end member 14. The second end member 14, and the first end member 12 and the second end member 14 are connected to each other. The support 10 is fixed inside the cavity of the intermediate member 16. and a threaded rod 18 threadedly engaged within the cavity of the second end member 14. As shown in Figs. 1-8, a first adjustment member is provided at the distal end portion of the first end member 12. A mechanism is provided to selectively axially translate into the interior of the cavity of the first end member 12. As shown in FIGS. 1 to 7, 10 and 11, first and second joints or connection mechanisms 22 , 24 are attached to the terminal portions or free ends of the first end member 12 and the second end member 14, respectively. It is possible for the information to be provided.

[0033] As shown in FIGS. 1 to 6, the first end member 12 has a first joint 22, the tubular member having or defining an internal cavity extending axially from an end portion opposite the end portion of the tubular member. As shown in Figs. 1 to 6, the first end member 1 2 has an axially extending slot 40 in the strut body which communicates with the internal cavity of the strut. The intermediate member 16 is also disposed near the first joint 22 (and the second joint 23) as shown in FIGS. an internal cavity extending axially from a distal end portion of the intermediate member 16 (distal from the joint 24) The intermediate member 16 is shown in Figs. As shown, the first end member 12 is axially slidable or translatable within the internal cavity thereof. and exits from an end portion of the first end member 12 opposite the first fitting 22 As shown in Figs. 1-9, the intermediate member 16 has a support portion. The outer surface of the body may be provided with a surface texture that increases the friction of the outer surface. The outer surface of member 16 has axially spaced circumferential grooves / serrations, friction contacts, etc. The surface may be provided with a coating, or any other roughness or frictional structure or material. .

[0034] As shown in FIGS. 1 and 5-7, the intermediate member 16 is a part of the internal cavity of the first end member 12. connected to a radially extending pin member / portion 48 which is connected to a portion of the intermediate member on the inside For example, the pin member 4 may be provided with a pin member / portion. 8 may be fixedly connected to an end portion of intermediate member 16. Pin member 48 may be fixedly connected to an end portion of intermediate member 16. is axially slidably received along / within the internal cavity of the first end member 12. 1 and 2. The first end member 12 is disposed within a slot 40 in the first end member 12 so as to be supported by the first end member 12 and fixed in position relative to the first end member 12 but rotationally fixed. The intermediate member 16 is thereby telescoped axially relative to the first end member 12. It is possible for the actuators to be rotationally fixed but fixed in position.

[0035] As shown in FIGS. 6 and 7, the pin member 48 is also connected to the threaded rod 18. and the intermediate member 16 can be rotatably and axially fixedly connected. For example, a pin member 48 may be fixedly connected to an end portion of the intermediate member 16. As shown in FIGS. The intermediate member 16 is radially connected within the cavity of the member to the threaded rod 18 and the inner surface of the strut body (i.e. 5) Sleeves, spacers, collars or the like arranged between the outer wall of the cavity 0. As a result, the sleeve can guide the threaded rod 18 from the strut body / cavity wall. can be radially spaced (and potentially centered) from the 2, the second end member 14 is threadably engaged with the threaded rod 18, as described below. As a result, the second end is able to translate axially and pivotally about the At least the distal end portions of the first and second members 16 are received within the axial cavity of the intermediate member 16; and It may be radially disposed between the threaded rod 18 and the body portion of the intermediate member 16 .

[0036] As discussed above, the strut assembly 10 includes a distal end portion of a first end member 12, a The reed or bushing 42 allows the intermediate member 16 to freely move within the axial cavity of the first end member 12. and selectively allowing the intermediate member 16 to be translated axially relative to the first end member 1 2. A first adjustment mechanism is provided that is configured to selectively axially lock relative to the first adjustment mechanism. As shown in FIGS. 1-8, 10 and 11, the first adjustment mechanism of the column assembly 10 includes: A first collar, ring, and knob are rotatably threadedly engaged with the distal end portion 42 of the first end member 12. The distal portion 42 of the first end member 12 includes a first end member 14 and a second end member 16. The end portion may be integral with the first end member 12 or may be fixedly connected to the first end member 12. The portion 42 may include external threads, and the collar member 44 may be configured such that the collar member 44 is When pivoted about portion 42, first collar 44 translates axially along distal portion 42. The distal end portion 42 may be provided with internal threads that mate with the external threads of the distal end portion 42 so as to be

[0037] As shown in FIGS. 7 and 8, the fastening portion of the collar member 44 is The end portion 42 is disposed axially beyond the end portion 42 and is provided with a bearing surface 21. In an embodiment, as shown in FIG. 8, the bearing surface is axially spaced from the first joint 22 and is a second joint. 2. As it extends toward the joint 24, it tapers toward the outer surface of the body portion of the intermediate member 16. The surface may include a tapered surface, such as a surface that

[0038] As further shown in FIGS. 7 and 8, the strut assembly 10 is radially spaced apart from the intermediate member 16. A friction or support member 46 may be provided between the outer surface of the body portion and the support surface 21. In some embodiments, the friction member 46 may be a radially deformable ring member. In some such embodiments, a radially deformable member may be included. Member 46 may include a segmented ring, a split ring, or a similar member.

[0039] As shown in FIG. 8, the first end member 12, the collar member 44 and the friction member 46 are The roller member 44 extends along the terminal portion 42 of the first end member 12 toward the first fitting 22 ( By axially advancing (e.g. by rotation), the bearing surface 21 of the collar member 44 is brought into friction with the and urging the friction member 46 radially against the outer surface of the intermediate member 16. The intermediate member 16 is pressed against the outer surface of the intermediate member 16 and the friction surface of the intermediate member 16. The support surface 21 is configured to apply a compressive / frictional force between the support member 46 and the support surface 21. In other words, the collar member 44 is secured to the first fitting 22 along the terminal portion 42 of the first end member 12. (or the terminal portion of the first end member 12 connected to the first fitting 22) By the translation, the friction member 46 is pressed against the main body portion of the intermediate member 16 by the bearing surface 21. 1, the intermediate member 16 is pressed radially against the outer surface of the first end member 12. On the other hand, the first end member 12, the collar member 44 and the friction member 46 are fixed in the axial direction. Additionally, a collar member 44 is attached to the second end member 14 along the distal end portion 42 of the first end member 12. and / or by advancing axially (e.g., by rotation) towards the second joint Q4. The bearing surface 21 is translated away from the friction member 46 to release the friction member, and As a result, the friction member 46 moves radially away from the outer surface of the intermediate member 16. and / or applying a compressive force to the outer surface of the intermediate member 16. 3, so that the intermediate member 16 can be prevented from (or at least reduced) from being pulled from the first end member 1 2. The method of claim 1, further comprising: In this manner, the axial arrangement of the intermediate member 16 and the first end member 12 is The arrangement, and as a result the overall axial length of the strut assembly 10, is and potentially a first end member and / or an intermediate member 16 (or, for example, a second end Through the engagement of the member 14), the user can easily and quickly select / configure / adjust the This can be achieved, for example, by using the strut assembly of the fastening system 100 of FIGS. 16-19. The arrangement of the column assembly 10 of the fastening system 100 shown in FIG. The figures are shown in comparison to the previous year's results.

[0040] As discussed above, the strut assembly 10, as shown in FIGS. The second end member 14 is translated axially relative to the intermediate member 16, thereby To fine-tune the overall axial length of the assembly 10, the second end member 14 is attached to an intermediate member 16. and a second adjustment mechanism configured to selectively rotate the second adjustment mechanism relative to the threaded rod 18. As shown in FIGS. 1 to 7 and 9, the second adjustment mechanism is provided with a second adjustment mechanism 24 ( The intermediate member 16 may be provided at an end portion of the intermediate member 16 (and distal from the first joint 22).

[0041] As further discussed above and shown in FIGS. 6-9, the axial direction of the intermediate member 16 The post body portion of the intermediate member 16 that defines the hollow (i.e., the internal cavity of the intermediate member 16) At least a rod-engaging portion 52 of the inner surface or wall of the In some embodiments, the engagement portion 52 of the intermediate member 16 may be, as shown in FIGS. the inner surface of the strut body portion of the intermediate member 16 that defines the internal cavity of the intermediate member 16; In some other embodiments, the engagement portion 52 of the intermediate member 16 may be the inner surface or wall of the strut body portion of the intermediate member 16 that defines the internal cavity of the intermediate member 16; It may be integral, i.e. at least a portion of said inner surface or wall.

[0042] In some embodiments, as shown in FIGS. 6-9, the engagement portion 52 of the intermediate member 16 The threaded rod has an outer thread that is threadedly engaged with the inner thread of the engagement portion 52 of the intermediate member 16. In some alternative embodiments (not shown), the engagement portion 52 of the intermediate member 16 The intermediate member 16 has an outer thread and the threaded rod has an inner thread that meshes with the outer thread of the engagement portion 52 of the intermediate member 16. Equipped with side threads.

[0043] As shown in FIGS. 1-7 and 9, the second adjustment mechanism is provided at the distal end portion 53 of the intermediate member 16. The second collar member 54 is axially fixed and pivotally connected to the first collar member 54. As shown at 6, 7 and 9, the first portion of the second collar member 54 is connected to the intermediate member 16. Extending over and / or around the end portion 53 and pivotally connected thereto For example, the inner side of the second collar member 54 and the intermediate member 55 may be fixed in the axial direction. The outer sides of the end portions 53 of the 16 are aligned axially in the same position as shown in Figs. A circumferential slot or opening and a washer, split ring, etc. extending into the slot or opening. , an O-ring or similar member 56. As a result, the washer or ring The member 56 is configured such that the first portion of the second collar member 54 is positioned over the end portion 53 of the intermediate member 16 ( The second collar member 54 is capable of rotating (around the axis X-X) but is held in contact with the intermediate member 16. axially translated (i.e. translated along axis X-X) on the end portion 53 of This can be prevented.

[0044] As shown in FIGS. 6, 7 and 9, the second portion of the second collar member 54 includes a second end Extends over and / or around member 14 and is pivotally secured to the second end member (i.e., fixedly connected to the member). As shown in FIGS. 6, 7 and 9, the second portion of the second collar member 54 is radially Attached to (or otherwise equipped with) an extending pin member / portion 55 As shown in Figs. 2, 3 and 6 to 9, the support body portion of the second end member 14 The outer surface of the pin member 55 includes an axially extending slot 72 that receives or accommodates the pin member 55 therein. The pin member 55 and the slot 72 are arranged such that the pin member 55 is aligned with the axis of the slot 72. The actuator is configured to be capable of axial translation along the axial length. As a result, the pin member 55 (which extends through the slot 72 in the pin member 55 and second end member) The second collar member 54 and the second end member are pivotally fixed or fixedly connected together. However, the second end member 14 is in contact with the pin member 55 and, therefore, with the intermediate member 16. In contrast, it allows translation in the axial direction.

[0045] As a result, on and / or around the second end member 14 (i.e., around the axis X-X) The second collar member 54 rotates, so that the second end member 14 fits into the void of the intermediate member 16. The intermediate member 16 and the threaded rod 18 rotate within the cavity (i.e., the intermediate member 16 and the threaded rod 18 rotate within the cavity). The engaging portion 52 of the second end member 14 and the threaded rod 18 are Because of the threaded engagement, rotation of the second collar member 54 rotates the second end member 14 relative to the threaded rod 18. axial translation of the second end member 14 relative to the intermediate member 16. In this manner, the axial arrangement of the intermediate member 16 and the second end member 14, as well as As a result, the entire axial length of the strut assembly 10 is (i.e., by rotating the second collar member 54 in a particular angular direction about the axis X-X) can be easily and quickly finely selected / configured / adjusted by the user. This can be seen, for example, in the arrangement of the strut assembly 10 of the fastening system 100 shown in Figs. 16 to 19. is.

[0046] It should be understood that the above description is intended to be illustrative and not restrictive. Numerous modifications and variations will occur to those of ordinary skill in the art that fall within the scope of the following claims and their equivalents. Without departing from the general spirit and scope of the present invention as defined herein. For example, the above embodiments (and / or aspects thereof) may be implemented in In addition, the teachings of the various embodiments may be used in any combination. Many modifications may be made to adapt a particular situation or material to the disclosed subject matter without departing from the scope of the invention. The dimensions and types of materials described herein are intended to be consistent with the principles of the various embodiments. These are intended to define certain parameters, but are by no means limiting and are merely examples. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. Thus, the scope of various embodiments is set forth in the appended claims, as well as the scope of such claims. The scope of equivalents to which the present invention is entitled should be determined in relation to the full scope of equivalents to which the present invention is entitled. In the claims, the terms "including" and "in which" are used in conjunction with the terms "comprising" and "wherein n)" is used as the plain English equivalent. The terms "first," "second," and "third," etc. are used merely as labels. The term "operation" is not intended to impose numerical requirements on the objects of such terms. "Operably connected," as used herein, means that separate and distinct components are directly or indirectly connected to one another. and integrally formed (i.e., monolithic) construction. Moreover, in the following claims, The limitations in this document are not written in means-plus-function form and are not The claim limitation clearly uses the words "means for" and then provides further structure. If the invention does not involve a structure or function, then the sixth paragraph of 35 U.S.C. § 112 is not applicable. It is not intended to be interpreted as meaning that any particular embodiment is It should be understood that not all objectives or advantages may be achieved. Thus, for example, one of ordinary skill in the art will appreciate that the systems and techniques described herein are embodied or carried out in a manner that achieves or optimizes one or a group of advantages taught in and may not necessarily achieve all of the objectives or advantages taught or implied herein. You will recognize that.

[0047] Although the present invention has been described in detail with respect to only a limited number of embodiments, the present invention It should be readily understood that the present invention is not limited to the disclosed embodiments. On the contrary, the present invention relates to any material not previously described herein but which is commensurate with the spirit and scope of the present invention. , may be modified to incorporate any number of variations, modifications, alternatives, or equivalent arrangements. In addition, while various embodiments of the present invention have been described, aspects of the present disclosure include It should be understood that the present invention may include only some of the embodiments described. The invention should not be deemed limited by the foregoing description, but rather by the following claims. is limited only by the scope of

[0048] This written description is provided for the purpose of disclosing the invention, including the best mode, as well as for the purposes of Making and using any device or system and performing any embodied method To enable any person skilled in the art to practice the present invention, including The patentable scope of the invention is defined by the claims and is intended to be understood as meaning that those skilled in the art will recognize that the invention is not limited to the disclosed subject matter. Such other embodiments may include those embodiments which occur to those skilled in the art. If the claimed invention has structural elements that are not different from the literal words of the claim, or The present invention relates to a method for manufacturing a device that includes an equivalent structural component that does not substantially differ from the literal words of the claims. are intended to be within the scope of the claims.

Claims

1. 1. A strut assembly for a bone and / or tissue fixation system, comprising: a first strut body having an axially elongated tubular shape; an elongated intermediate member, the intermediate member being pivotally fixed and axially translatably received in the first strut body and extending axially therefrom; an outer threaded rod in the intermediate member, the outer threaded rod being rotatably and axially connected to the intermediate member; an axially elongated tubular second strut body received in the intermediate member, the outer threaded rod being rotatably coupled within the second strut body, and the second strut body extending axially from the intermediate member; a first adjustment mechanism configured to selectively axially fix the intermediate member relative to the first strut body or selectively allow the intermediate member to translate freely axially relative to the first strut body; and a second adjustment mechanism configured to selectively rotate the second strut body relative to the intermediate member and the outer threaded rod, and thereby selectively translate the second strut body axially relative to the intermediate member and the outer threaded rod; A strut assembly comprising:

2. 2. The strut assembly of claim 1, wherein an end portion of the first strut body comprises at least a first coupling member configured to couple to a first external fixation base, and an end portion of the second strut body comprises at least a second coupling member configured to couple to a second external fixation base.

3. 2. The strut assembly of claim 1, wherein the body portion of the first strut body includes an axially extending cavity and an axially extending slot in an inner wall thereof, and the intermediate member is pivotally secured and axially translatable within the cavity of the first strut body by a radially extending pin connected to the intermediate member and received within the slot.

4. The strut assembly of claim 3 , wherein the pin is further connected to the outer threaded rod to provide a pivotally and axially fixed connection between the outer threaded rod and the intermediate member.

5. 2. The strut assembly of claim 1, wherein an end portion of the second strut body is received within the intermediate member and is radially disposed between the outer threaded rod and a body portion of the intermediate member.

6. The strut assembly of claim 1 , wherein said intermediate member includes an internally threaded cavity and said external threads of said external threaded rod threadably mate with said internally threaded cavity.

7. 2. The strut assembly of claim 1, wherein the terminal portion of the first strut body has external threads, and the first adjustment mechanism comprises a first collar member with internal threads that mesh with the external threads of the terminal portion of the first strut body, and wherein rotation of the first collar member about the terminal portion of the first strut body causes the first collar to translate axially along the terminal portion of the first strut body.

8. 8. The strut assembly of claim 7, wherein the fastening portion of the first collar member is disposed axially past the end portion of the first strut body and comprises a tapered bearing surface, and the first adjustment mechanism further comprises a friction member disposed radially between an outer surface of the body portion of the intermediate member and the bearing surface.

9. 9. The strut assembly of claim 8, wherein the first collar translates axially in a first direction along the end portion of the first strut body, causing the friction member to be urged radially by the bearing surface against the outer surface of the body portion of the intermediate member to selectively axially secure the intermediate member to the first strut body.

10. 10. The strut assembly of claim 9, wherein the bearing surface comprises a surface that slopes toward the outer surface of the body portion of the intermediate member as it extends axially away from the second end portion.

11. The strut assembly of claim 9 , wherein the friction member comprises a deformable ring member.

12. The strut assembly of claim 1 , wherein said second adjustment mechanism includes a second collar member axially fixedly and pivotally connected to a distal end portion of said intermediate member.

13. 13. The strut assembly of claim 12, wherein a body portion of a second strut body includes an axially extending slot, and said second adjustment mechanism is pivotally secured to said strut body by a radially extending pin coupled to said second collar member and received in said slot of said second strut body such that rotation of said second collar member about an end portion of said intermediate member causes said second strut body to translate axially relative to said intermediate member and said outer threaded rod.

14. 1. A bone and / or tissue external fixation system comprising: The first foundation, The second foundation, and a plurality of struts extending between the first and second bases; It is equipped with A system, wherein at least one of the plurality of struts comprises a strut assembly according to claim 1 .

15. 15. The bone and / or tissue external fixation system of claim 14, wherein the first base is configured to be coupled to a first bone and / or tissue of a patient and the second base is configured to be coupled to a second bone and / or tissue of a patient.

16. 15. The bone and / or tissue external fixation system of claim 14, wherein an end portion of the first strut body comprises a first joint member configured to couple to the first base, and an end portion of the second strut body comprises a second joint member configured to couple to the second base.

17. 15. The bone and / or tissue external fixation system of claim 14, wherein the body portion of the first strut body comprises an axially extending cavity and an axially extending slot in an inner wall thereof, and the intermediate member is pivotally fixed and axially translatable within the first strut body cavity by a radially extending pin connected to the intermediate member and received in the slot, the pin being connected to the outer threaded rod to provide a rotationally and axially fixed connection between the outer threaded rod and the intermediate member.

18. 15. The external fixation system of bone and / or tissue according to claim 14, wherein an end portion of the second strut body is received within the intermediate member and radially disposed between the outer threaded rod and a body portion of the intermediate member.

19. The external fixation system of claim 14 , wherein the intermediate member comprises an internally threaded cavity, and the external threads of the external threaded rod mesh with the internally threaded cavity.

20. 15. The external fixation system of bone and / or tissue according to claim 14, wherein the distal portion of the first strut body comprises external threads, and the first adjustment mechanism comprises an internally threaded first collar member which meshes with the external threads of the distal portion of the first strut body, and wherein rotation of the first collar member about the distal portion of the first strut body causes the first collar to translate axially along the distal portion of the first strut body.

21. 21. The bone and / or tissue external fixation system of claim 20, wherein the fastening portion of the first collar member is disposed axially past the end portion of the first strut body and comprises a tapered bearing surface, and the first adjustment mechanism further comprises a friction member disposed radially between an outer surface of the body portion of the intermediate member and the bearing surface.

22. 22. The bone and / or tissue external fixation system of claim 21, wherein the first collar translates axially in a first direction along the end portion of the first strut body, causing the friction member to be radially pressed by the bearing surface against the outer surface of the body portion of the intermediate member to selectively axially fix the intermediate member to the first strut body.

23. 23. The bone and / or tissue external fixation system of claim 22, wherein the bearing surface comprises a surface that slopes toward the outer surface of the body portion of the intermediate member as it extends axially away from the second end portion.

24. The bone and / or tissue external fixation system according to claim 22 , wherein the friction member comprises a deformable ring member.

25. 15. The bone and / or tissue external fixation system of claim 14, wherein the second adjustment mechanism comprises a second collar member axially fixed and pivotally connected to a distal end portion of the intermediate member.

26. 26. The bone and / or tissue external fixation system of claim 25, wherein the body portion of the second strut body comprises an axially extending slot, and the second collar member is pivotally secured to the body portion by a radially extending pin coupled to the second collar member and received in the slot of the second strut body, such that rotation of the second collar member about the end portion of the middle member causes the second body portion to translate axially relative to the middle member and the outer threaded rod.

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