• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    humeral head fixation device for bones with osteoporosis is a device that includes an elongated body configured to attach to a bone stabilization implant so that when it is positioned on the desired bone, the elongated body extends beyond it at an angle selected to penetrate the targeted part of the bone. the body defines a channel within it that extends to an opening at its distal end. the device also includes an expandable member within the body channel to move between a first and a second position. furthermore, the device includes several wires attached to the expandable member so that its movement through the channel moves them between an introduction position and an expanded position, in which the distal ends of the wires penetrate the region of the bone adjacent to the distal end of the body.
    公开号:BR112012002215B1
    申请号:R112012002215-6
    申请日:2010-08-16
    公开日:2020-06-02
    发明作者:Konrad Schaller；Alfred Niederberger；Johann Fierlbeck
    申请人:Synthes Gmbh；
    IPC主号:
    专利说明:

    “HUMAN HEAD FIXATION DEVICE FOR BONES WITH OSTEOPOROSIS”
    Priority Claim [0001] This application claims priority to US provisional application of paragraph 2 of Series 61 / 242,093, filed on September 14, 2009 and entitled "Humeral Head Fixation Device for Osteoporotic Bone," which incorporated revelation by reference and in full to this document.
    Field of the invention [0002] The present invention relates to the treatment of bones and, in particular, to a system and method for treating bones with osteoporosis using predefined wires that penetrate the bone when force is exerted on its extremities proximal.
    Background of the invention [0003] The treatment of proximal and distal bone fractures can be quite challenging when performed in elderly patients with bones with osteoporosis, as it is not possible to fix the implants on the bones with stability. Often, the operational techniques used to treat proximal and distal fractures in the bones result in complications such as malunion, non-union, aseptic bone necrosis of the epiphysis, loosening of the screws and / or loss of reduction.
    Summary of the invention [0004] The present invention relates to a device for treating bones that comprises an elongated body configured to couple with a bone plate so that, when it is arranged in the desired position in the desired bone, the body elongated extends away from said bone plate at a selected angle to penetrate the desired part of the bone along a desired path. The elongated body defines a channel within it that extends to an opening at its distal end. In addition, the device includes an expandable member
    Petition 870200022451, of 02/14/2020, p. 8/22
    2/8 within the elongated body channel, which moves between a first and a second position. The device also includes several wires coupled to the expandable member so that its movement along the channel moves the wires between an introduction position, in which the distal ends of the wires are within the channel, and an expanded position, in which the distal ends of the wires extend distally out of the opening at the distal end of the elongated body in order to penetrate the region of the bone adjacent to the distal end of the elongated body. The strands tend to assume the shape of an anchor when they extend outward from the elongated body.
    Brief description of the drawings [0005] Figure 1 illustrates a perspective view of a system according to an exemplary embodiment of the present invention;
    [0006] figure 2 shows a side view in cross section of the system of figure 1 in a first configuration;
    [0007] figure 3 shows a side view in cross section of a device of the system of figure 1 in a first configuration;
    [0008] figure 4 shows a side view in cross section of the system of figure 1 in a second configuration;
    [0009] figure 5 shows a side view in cross section of the distal part of the device of figure 3 in a second configuration;
    [0010] figure 6 shows a side cross-sectional view of a device according to an alternative embodiment of the present invention in a first configuration;
    [0011] figure 7 shows a side view in cross section of the device of figure 6 in a second configuration.
    Detailed description [0012] The present invention will be better understood
    Petition 870200022451, of 02/14/2020, p. 9/22
    3/8 by reading the description below with reference to the accompanying drawings, in which similar elements are indicated by equal reference numbers. The present invention relates to the treatment of bones, in particular the treatment of bones with osteoporosis, which can be difficult to repair. The exemplary embodiments of the present invention describe a system and method for treating a bone using preformed threads that penetrate the bone when force is exerted on its proximal ends. Although the exemplary embodiments described refer specifically to the treatment of upper humerus fractures, those skilled in the art will realize that it is possible to use the present invention to treat any bone in the body. It is also worth noting that the terms proximal and distal, as used in this document, are intended to describe the directions near (proximal) and away (distal) from the surgeon or another user of the device.
    [0013] As figures 1 to 5 illustrate, a system 100 according to an exemplary embodiment of the present invention comprises a device 102, attachable or built integrally to a longitudinal plate 104, for fixing a bone fracture, such as the femur or the humerus. As shown in Figure 1, the device 102 is coupled to a first end 106 of the plate 104 and extends beyond this end 106 at a certain angle in relation to the longitudinal axis of the plate 104 selected so that when the plate 104 is arranged in the desired position on the targeted bone, the device 102 extends along a desired path to the head of the targeted bone. The plate 104 extends from the first end 106 to a second end 108 and includes several openings 110 along its length for receiving bone fixation elements in order to fix it 104 in the targeted bone. Although the device 102 is illustrated built entirely next to the plate 104, those skilled in the art will realize that, in an alternative embodiment, a device 102 ', as shown in figures 6 and 7, can be built as a separate component configured to be coupled to the plate 104, to a pin or other fastener. For example, device 102 'can be inserted into the bone
    Petition 870200022451, of 02/14/2020, p. 10/22
    4/8 through an opening in plate 104. Since device 102 'is a separate component, those skilled in the art will realize that the proximal end 114' of device 102 'is configured to couple with plate 104. We will describe device 102 'in more detail later. Those skilled in the art will also realize that, although device 102 is illustrated attached to the first end 106 of plate 104, it can connect or engage at any point along the length of plate 104 provided that when plate 104 engages to the desired bone in the desired position, it extends within the bone head along a desired path.
    [0014] The device 102 also comprises an elongated body 112 that houses a screw 120 and several wires 122, which, in the introduction configuration, are inside the body 112 and pass to an expanded configuration, in which they extend outward from the body 112 and into the head of the desired bone. The elongated body 112 extends from a proximal end 114 to a distal end 116 and includes a channel 118 through it. The proximal end 114 of the elongated body 112 binds or engages the plate 104 so that it can be positioned externally to the targeted bone while the elongated body 112 extends within the bone. The channel 118 is dimensioned and formed to accommodate the screw 120 and the various wires 122 so that the screw 120 and the various wires 122 move longitudinally with respect to it. In the introduction configuration, illustrated in figures 2 and 3, the wires 122 are substantially within the channel 118. The rotation of the screw 120 around the longitudinal axis of the device 102 moves the various wires 122 along the longitudinal axis and distally in in relation to the elongated body 122 to the expanded configuration, illustrated in figures 4 and 5.
    [0015] As figures 2 to 5 illustrate, more specifically, each of the wires 122 extends longitudinally from a proximal end 146, which includes a protuberance 150 which extends radially inward to engage with the slot 142 head 138
    Petition 870200022451, of 02/14/2020, p. 11/22
    5/8 of screw 120, so that the various wires 122 are spaced circumferentially around screw 120. Wires 122 and screw 120 rotatably engage each other so that wires 122 do not rotate when screw 120 turns through the elongated body 112. Preferably, the distal ends 148 of the threads 122 include a bone penetration tip 152 that can be formed, or otherwise treated, to facilitate penetration into the cancellous bone by the threads 122. As we can see in figure 5, in the expanded configuration, the distal parts of the wires 122 extend distally out of the distal end 116 of the elongated body 112 in order to penetrate the head of the targeted bone in which the device 102 has been inserted. In this embodiment, when leaving the body 112, the wires 122 tend to assume a memorized shape, in which they extend distally beyond the distal end 116 by a distance and then bend back proximally to anchor the device 102 in the desired bone . For example, yarns 122 can be made of a material with shape memory, such as nitinol. The threads 122 made of such material can be preformed in the curved configuration, in which a distal part 154 of each thread curves between about 90 ° and 180 °. In the introduction configuration, the wires 122 remain in a substantially straight configuration within the elongated body 112. However, as the wires 122 move to the expanded configuration, the distal parts 154 extend beyond the distal end 116 of the elongated body 112 and recede to the curved configuration as the sharp point 152 pierces the bone. The number of wires 122 and their circumferential orientation can vary depending on the tissues of the patient in question and the load-bearing capacity of the device 102.
    [0016] As wires 122 move to the expanded configuration along these curved pathways, the length of wires 122 within the bone increases while preventing wires 122 from getting too close to the outer surface of the head desired bone. Those skilled in the art will realize that this curvature of the threads 122 away from the outer surface
    Petition 870200022451, of 02/14/2020, p. 12/22
    6/8 of the head results in a heavy-duty, heavy-duty attachment movement of device 102 after wires 122 are implanted in the targeted bone. The sharp point 152 pierces the bone forming a recess of substantially the same shape and size as the threads 122, which results in a stable interface. In addition, the curved configuration guides the wires 122 away from the cartilage in an area of bone articulation, preventing damage to joint surfaces. The curved configuration also facilitates the dynamic behavior required for a smooth transition between compression and shear forces. Thus, those skilled in the art will realize that, by moving the various wires 122 from the introduction configuration to the expanded configuration, the stability and fixation of the device 102 is increased within the desired bone.
    [0017] The thickness of the wall of the distal part 124 of the elongated body 112 is greater than the thickness of the wall of the proximal part 126 of the elongated body 112, making the part of the channel 118 that passes through the distal part 124 be of greater diameter. than the part of the channel 118 that passes through the proximal part 126. The distal part 124 includes a thread 128 along at least part of its inner surface 130 to engage with the rod 136 of the screw 120. The distal part 124 may include still several openings 132, which extend along a length of the distal part 124 and align longitudinally with the inner surface 134 of the proximal part 126 of the elongated body 112, allowing each of the wires 122 to extend along the inner surface 134 to a of the openings 132. Therefore, those skilled in the art will realize that the openings 132 are dimensioned and formed to accommodate the wires 122.
    [0018] The screw 120 includes a head 138 and a rod 136 that extends distally from it. Head 138 includes a guide stroke 140, such as a hexagonal recess, for engaging a wrench to drive screw 120 distally through channel 118 of elongate body 112 in order to move the wires between the introduction and
    Petition 870200022451, of 02/14/2020, p. 13/22
    7/8 expanded. Head 138 further includes a groove 142 around its circumference to mate with proximal ends 146 of wires 122. Shank 136 includes a thread 144 along its length to engage thread 128 of distal part 124 of the body elongated 112. Thus, the rotation of the screw 120 about the longitudinal axis of the device 102 moves the device 102 between the input and expanded configurations. In the introduction configuration, the screw 120 is substantially within the channel 118 of the elongated body 112, whereas, in the expanded configuration, the distal end of the screw 120 extends distally beyond the body 112. Furthermore, the screw 120 can include a head 138 configured so that, when the device 102 moves to the expanded configuration, it makes contact with the proximal end 156 of the distal part 124 of the elongated body 112, making the screw 120 unable to move distally beyond this point .
    [0019] Those skilled in the art will also realize that it is possible to remove the device 102 from the bone by turning the screw 120 around the longitudinal axis in the opposite direction to the direction using to move the device 102 to the expanded configuration. Thus, screw 120 recedes proximally back to the elongated body 112, collecting the wires 122 along the curved pathways by which they have expanded back to channel 118 towards the introduction configuration. Thereafter, the device 102 is no longer anchored to the head of the desired bone and can be removed from it as those skilled in the art will understand.
    [0020] As figures 6 and 7 illustrate, the device 102 'can be substantially similar to the device 102 described above with reference to the system 100. The device 102' can be a pin, screw or other fastener that is inserted in the head of the desired bone through an opening in the plate 104. Like the device 102, the device 102 'includes an elongated body 112' extending from a proximal end 114 'to a distal end 116', with a channel 118 '
    Petition 870200022451, of 02/14/2020, p. 14/22
    8/8 that runs through it. The channel 118 'is dimensioned and formed to accommodate a screw 120' and several wires 122 'so that the screw 120' and the wires 122 'move longitudinally with respect to it between an introduction configuration, illustrated in figure 6, and an expanded configuration, shown in Figure 7. The proximal end 114 'of the elongated body 112' includes a coupling mechanism for coupling to the plate 104. For example, the proximal end 114 'may include a thread 115' along its outer surface to engage a thread in one of the openings of the bone plate 104.
    [0021] In the introduction configuration, the threads 122 'are substantially within the elongated body 112'. Like screw 120, screw 120 'moves with respect to elongated body 112' to move wires 122 'to the expanded configuration, in which its distal parts 154' extend distally beyond the distal end 116 'of the elongated body 112 'and inside the bone head, followed by a curved path of the distal parts 154'. The screw 120 ', however, does not rotate in relation to the elongated body 112' to expand the wires 122 ', but non-rotatingly engages the proximal end 146' of the wires 122 '. Screw 120 'can include a pin 158' at its proximal end so that pin 158 'can be used to drive it and wires 122' distally through channel 118 'and the expanded configuration. To remove the device 102 'from the bone, the screw 120' can be pulled proximally through the channel 118 'by the pin 158', thus bringing the wires 122 'back to the introduction configuration along the curved paths through which they have expanded. Thereafter, device 102 'is no longer anchored to the bone head, thus allowing it to be removed from it.
    [0022] It will be evident to those skilled in the art the possibility of making several modifications and variations to the structure and methodology of the present invention without, therefore, diverging from its scope or its essence. Therefore, it is intended that the present invention covers
    Petition 870200022451, of 02/14/2020, p. 15/22
    9/8 modifications and variations to it, provided that within the scope of the appended claims and their equivalents.
    权利要求:
    Claims (12)
    [1]
    1. Device (102) for treating a bone characterized by comprising:
    - an elongated body (112) configured to couple with a bone stabilization implant so that, when it is placed in the desired position in the desired bone, the elongated body (112) extends beyond the bone stabilization implant at an angle selected in order to penetrate the desired region of the bone along a desired path, the elongated body (112) defining a channel (118) within it that extends to an opening at its distal end (116);
    - an expandable member housed within the channel (118) of the elongated body (112) to move between a first and a second position; and
    - several wires (122) coupled to the expandable member so that its movement through the channel (118) moves them between an introduction position, in which their distal ends (148) are inside the channel (118), and an expanded position, in which its distal ends (148) extend distally beyond the opening at the distal end (116) of the elongated body (112) in order to penetrate the region of the bone adjacent to the distal end of the elongated body, the threads ( 122) tending to assume an anchor shape when they extend beyond the elongated body (112);
    wherein the wires (122) are coupled to an external surface of the expandable member by means of protuberances at its proximal ends (146).
    [2]
    2. Device (102) according to claim 1, characterized by the fact that the elongated body (112) and the bone stabilization implant are built as an integral part of each other.
    [3]
    Device (102) according to claim 1, characterized by the fact that the proximal end (114) of the elongated body (112) is configured to selectively couple to an opening in the
    Petition 870200022451, of 02/14/2020, p. 20/22
    2/3 bone stabilization implant.
    [4]
    4. Device (102) according to claim 1, characterized by the fact that, when in the form of anchoring, the wires (122) extend distally beyond the elongated body (112) for a first distance and then they curve radially away from the longitudinal axis of the elongated body (112).
    [5]
    5. Device (102), according to claim 4, characterized by the fact that, when in the form of anchoring, the distal ends (148) of the wires (122) turn in the proximal direction.
    [6]
    6. Device (102), according to claim 5, characterized by the fact that the first and second strands, when in the form of anchoring, curve at an angle of 90 ° and 180 °.
    [7]
    7. Device (102) according to claim 1, characterized by the fact that the distal ends (148) of the wires (122) are in the form of bone penetrating points.
    [8]
    8. Device (102) according to claim 1, characterized by the fact that the wires (122) are made of a material with format memory.
    [9]
    9. Device (102) according to claim 8, characterized by the fact that the material with format memory is nitinol.
    [10]
    10. Device according to claim 1, characterized by the fact that the expandable member is a screw (120) and the fact that the thread (136) of the screw engages with a corresponding thread (128) on the inner wall of the channel.
    [11]
    11. Device (102) according to claim 10, characterized by the fact that the wires (122) are non-rotatively coupled to the elongated body (112) and are rotationally coupled to the expandable member so that, as as the expandable member rotates, moving longitudinally through the expandable member, the wires (122) move longitudinally through the channel (118) without rotating with respect to it.
    Petition 870200022451, of 02/14/2020, p. 21/22
    3/3
    [12]
    12. Device (102), according to claim 1, characterized by the fact that the bone stabilization implant is one among a bone plate (104), a pin (158 ') and a fixation element.
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    法律状态:
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-07-02| B06T| Formal requirements before examination|
    2019-11-19| B07A| Technical examination (opinion): publication of technical examination (opinion)|
    2020-03-31| B09A| Decision: intention to grant|
    2020-06-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 16/08/2010, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US24209309P| true| 2009-09-14|2009-09-14|
    US61/242.093|2009-09-14|
    PCT/US2010/045598|WO2011031416A1|2009-09-14|2010-08-16|Humeral head fixation device for osteoporotic bone|
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