DE102013102955B4 - Wedge for staged spreading - Google Patents

Wedge for staged spreading

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Publication number
DE102013102955B4
DE102013102955B4 DE102013102955.8A DE102013102955A DE102013102955B4 DE 102013102955 B4 DE102013102955 B4 DE 102013102955B4 DE 102013102955 A DE102013102955 A DE 102013102955A DE 102013102955 B4 DE102013102955 B4 DE 102013102955B4
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Prior art keywords
movable support
pressure piece
surface
surfaces
main body
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DE102013102955.8A
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German (de)
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DE102013102955A1 (en
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Patentinhaber gleich
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Kuei-Jung Chen
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    • A61F2310/00203Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide

Abstract

Wedge for staged spreading, in particular for a lumbar spine implant, comprising a main body (10) and a screw (20) arranged in the main body (10) and connected at the end to a pressure piece (21), the main body ( 10) in the region of a peripheral side of the pressure piece (21) has at least a first and a second movable support unit (14) which each form at least one inner movable support surface (141) and one outer movable support surface (142) through a slot (13), wherein during a movement of the pressure piece (21) of the pressure piece (21), the inner movable support surface (141) can be spread out and then after a certain distance of movement of the pressure piece (21), the second support surface can be spread out, whereby the movable support units (14 ) with a suitable angle stagger the two adjacent vertebrae of a spine according to the distance between the two vertebrae ,

Description

  • The invention is directed to a wedge for staged spreading, in particular for a lumbar spine implant comprising a main body and a screw arranged in the main body and connected at the end to a pressure piece. Such a wedge is intended to distribute the attack force when inserting and have a function of height adjustment, so that the insertion is power-saving, precise and faster.
  • Due to age, accident, sports, malposition or occupational damage, spinal column deformations, cartilage deterioration or new bone formation can occur, in particular the age-related degenerative spinal column diseases. This can affect the function of the other organs of the body. To combat age-related degenerative spinal disease or spinal injury (by external force), an implant is often inserted or implanted in the spine.
  • From the Taiwanese utility models TW M414944 U1 . TW M411920 U1 . TW M409825 U1 . TW M400307 U1 and TW M384014 U1 For example, a vertebral implant is known that is implanted between two adjacent vertebrae (or lumbar vertebrae) to provide support and cushioning. The distance between the adjacent vertebrae is different. The above-mentioned implants all have only a certain dimension and can therefore be too strong or too loose.
  • The US 2011/0 282 396 A1 discloses an implant having a body comprising an upper and a lower end, a longitudinal bore formed by an internal thread, an external thread, and at least one stabilizing arm communicating with a longitudinal slot in the body.
  • The US 2002/0143401 A1 discloses a spinal implant that is at least partially radially expandable at a front or rear end for expansion in height and width.
  • From the document DE 10 2005 033 608 A1 an implant is known which has a cuboid base body which has legs on its top and bottom. Between the legs, a spreading element is arranged and support surfaces form the legs. The legs are spread continuously and simultaneously during the movement of the expansion element.
  • From the patent US 5 554 191 A For example, a height-adjustable implant is known which comprises a main body having two support parts, each having a toothed surface. The two support parts each form an inclined guide surface, which has a V-shaped opening. A screw is passed through the main body. One end of the screw protrudes from the opening of the two support members and is connected to a spreader. The expansion element is in the normal state of the two inclined guide surfaces. When the screw is turned by a tool, the two support parts can be spread out at a suitable angle and support the two vertebrae.
  • Although this makes it possible to adapt to the spacing of the vertebrae, however, when inserting the two support parts must first be spread out in such a way that they engage in the two vertebrae. Then they can be spread out further. Therefore, the insertion is more laborious. As the attack force is greater, the implant may slip, making insertion difficult and taking a longer time.
  • The invention has for its object to provide a wedge for staged spreading, which distributes the attack force when inserting and has a function of height adjustment, so that the insertion or insertion is power-saving and precise.
  • It is another object of the present invention to provide a wedge for staged spreading which can shorten the time of insertion.
  • This object is achieved by a wedge for staged spreading, in particular for a lumbar spine implant, which comprises a main body and a screw which is arranged in the main body and connected at the end to a pressure piece, wherein the main body in the region of a peripheral side of the pressure piece has at least a first and a second movable support unit, each forming by a slot at least one inner movable support surface, wherein upon movement of the pressure piece of the pressure piece initially the inner movable support surface can be spread out and then after a certain movement of the pressure piece, the second support surface can be spread out, whereby the movable support units with a suitable angle stably spread out the two adjacent vertebrae of a spine according to the distance between the two vertebrae.
  • Advantageous embodiments and advantageous developments of the invention are the subject of the respective subclaims.
  • In the following the invention with reference to embodiments with reference to the drawings will be described in detail. In the drawing shows:
  • 1 a perspective view of a first embodiment of the invention,
  • 2 a top view of the first embodiment of the invention,
  • 3 a schematic representation of the first embodiment of the invention,
  • 4 to 6 a representation of the spreading movement of the first embodiment of the invention,
  • 7 1 is a view of the first embodiment of the invention, wherein the guide surfaces form three stages,
  • 8th 1 is a view of the first embodiment of the invention, wherein the guide surfaces are formed obliquely,
  • 9 an illustration of the first embodiment of the invention, wherein the guide surfaces are formed in stages,
  • 10 a representation of the first embodiment of the invention, wherein the guide surfaces are arcuate,
  • 11 a perspective view of the second embodiment of the invention,
  • 12 a sectional view of the second embodiment of the invention,
  • 13 a perspective view of the third embodiment of the invention,
  • 14 a sectional view of the third embodiment of the invention,
  • 15 a perspective view of the fourth embodiment of the invention and
  • 16 a sectional view of the fourth embodiment of the invention.
  • The wedge for staged spreading according to the invention is made of titanium, tantalum, stainless steel, ceramic, alumina, PE, PU, PEEK or silica gel and has good biological compatibility and mechanical property.
  • The 1 to 6 show the first embodiment of the wedge according to the invention for staged spreading, the one main body 10 and a screw 20 that includes the main body 10 arranged and at the end with a pressure piece 21 connected is. The main body 10 is cuboid and formed in the present embodiment by an implant for a lumbar spine. However, the invention is not limited thereto. The main body 10 has on the upper and lower sides each have a toothed surface 11 and in the middle a transverse incision 12 open to the front, creating an upper and lower movable support unit 14 are formed. The mobile support units 14 each have a movable support surface 141 and a frame-shaped movable support surface 142 passing through a slot 13 are formed. In the figure, the slot 13 U-shaped. However, the invention is not limited thereto. The incision 12 has a wider section at the opening 121 through which the pressure piece 21 guided in the transverse direction and with the end of the screw 20 connected is. How out 3 it can be seen have the movable support surfaces 141 . 142 on the inside in each case a guide surface 1411 . 1421 that with the incision 12 and the wide section 121 connected is. The guide surfaces 1411 . 1421 have a suitable distance from each other and are each formed in the figures by an inclined surface. However, the invention is not limited thereto. The guide surface 1411 the inner movable support surface 141 lies on the inside of the pressure piece 21 at. The outer movable support surface 142 forms at the opening of the sipe 12 two shoulders 1422 which is a falling out of the pressure piece 21 prevent. The incision 12 is on the inside with a longitudinal hole 15 connected, reducing the movement of the support surfaces 141 . 142 is relieved. The movable support surface 141 has a hole in the middle 1412 into which the actual or artificial bone tissue is filled.
  • How out 4 is shown, the pressure piece is located 21 in the normal state at the guide surfaces 1411 the inner support surfaces 141 at. When the wedge is inserted between two adjacent vertebrae (not shown), the screw may 20 be rotated with a tool (not shown), whereby the pressure piece 21 is moved inwards and thus the inner guide surfaces 141 pushes, leaving the inner guide surfaces 141 initially spread out with a suitable angle. How out 5 it can be seen when the pressure piece moves inwards and the guide surfaces 1421 the outer movable support surfaces 142 achieved as it is in 6 is shown, the movable support surfaces 141 . 142 spread out simultaneously, whereby a gradual spread is achieved. Ie. The invention first presses with the pressure piece 21 the inner movable support surfaces 141 , whereby two adjacent vertebrae (not shown) are spread out. After a certain distance of movement then the outer support surfaces 142 spread out at the same time. By this stepwise spread the attack power is distributed. At the beginning of insertion, a suitable attack force is used to pass through the inner movable support surfaces 141 spread the two vertebrae (not shown) to avoid slipping of the implant. Therefore, the insertion of the wedge according to the invention is less forceful, precise and faster.
  • Like from the 7 and 8th it can be seen, the slots can 13 from outside to inside movable support surfaces 142 . 141 . 143 form to distribute the attack power in three stages. The guide surfaces 1421 . 1411 . 1431 the movable support surfaces 142 . 141 . 143 can be formed obliquely. How out 9 it can be seen, the guide surfaces 1421a . 1411 . 1431a also be trained in stages. How out 10 it can be seen, the guide surfaces 1421b . 1411B . 1431B also be formed arcuate.
  • The 11 and 12 show the second embodiment of the invention, which is a main body 30 and a screw 20 that includes the main body 30 arranged and at the end with a spherical pressure piece 21a connected is. The main body 30 is formed by a round cylinder or a hollow body with at least four edges and has a toothed surface on the outside 31 on. Through the radial slots 32 are at least two mobile support units 33 educated. Each support unit 33 forms through at least one slot 335 a movable support surface. In the figures are three movable support surfaces 331 . 332 . 333 and a frame-shaped movable support surface 334 educated. In the figures are the slots 335 U-shaped. However, the invention is not limited thereto. The main body 30 has an axle hole in the middle 34 at the opening a wider section 35 has. The spherical pressure piece 21a is in the wider section 35 taken and with the end of the screw 20 connected. The movable support surfaces 331 . 332 . 333 . 334 each have a guide surface on the inside 3311 . 3321 . 3331 . 3341 that have a suitable distance from each other. The guide surface 3341 the outermost movable support surface 334 lies on the inside of the pressure piece 21a at. If the screw 20 is rotated, the pressure piece 21a moved inward, causing the pressure piece 21a through the guidance of the guide surfaces 3341 . 3311 . 3321 . 3331 stepped the movable support surfaces 334 . 331 . 332 . 333 spreads out so that the movable support units 33 with a suitable angle, spread out the two vortices (not shown).
  • The main body may also be immovable. The 13 and 14 show the third embodiment of the invention, which is a main body 40 and a screw 20 that includes the main body 40 arranged and at the end with a pressure piece 21 connected is. The main body 40 is cuboid and has on the upper and lower sides each have a toothed surface 41 and in the middle a transverse incision 42 on, which is formed in two stages and a front wider section 43 has. The pressure piece 21 is in the transverse direction through the wider section 43 guided and with the end of the screw 20 connected. The upper and lower wall of the incision 42 form through slits 44 two movable support units 45 and two fixed frames 46 , Each movable support unit 45 continues through slots 44 at least two movable support surfaces decreasing from outside to inside. In the figures, two movable support surfaces 451 . 452 shown. In the figures are the slots 44 U-shaped. However, the invention is not limited thereto. The movable support surfaces 451 . 452 each have a guide surface on the inside 4511 . 4521 that with the incision 42 and the wide section 43 connected is. The guide surfaces 4511 . 4521 have a suitable distance from each other. The guide surface 4521 the inner movable support surface 452 lies on the inside of the pressure piece 21 at. If the screw 20 is rotated, the pressure piece is moved inwards, the upper and lower frame 46 remain unmoved. The pressure piece 21 can by guiding the guide surfaces 4521 . 4512 the movable support surface 452 . 451 stepped the movable support surfaces 452 . 451 spread out so that the two movable support units 45 in the upper and lower frames 46 with a suitable angle, spread out the two vortices (not shown).
  • The 15 to 16 show the fourth embodiment of the invention, which is a main body 50 and a screw 20 that includes the main body 50 arranged and at the end with a spherical pressure piece 21a connected is. The main body 50 is formed by a round cylinder or a hollow body with at least four edges and has a toothed surface on the outside 51 , Through the radial slots 52 At least two movable support units are formed. In the figures are three support units 53 and a fixed frame 54 educated. Each support unit 53 continues through slots 52 at least two movable support surfaces decreasing from outside to inside. In the figures are three movable support surfaces 531 . 532 . 533 , In the figures are the slots 52 U-shaped. However, the invention is not limited thereto. The main body 50 has an axle hole in the middle 55 at the opening a wider section 551 has. The spherical pressure piece 21a is in the wider section 551 taken and with the end of the screw 20 connected. The movable support surfaces each have a guide surface on the inside 5311 . 5321 . 5331 that with the axle hole 55 and the wider section 551 are connected and have a suitable distance from each other. The guide surface 5311 the outermost movable support surface 531 lies on the inside of the pressure piece 21a at. If the screw 20 is rotated, the pressure piece 21a moved inward, taking the frame 54 remain unmoved. The pressure piece 21a can by guiding the guide surfaces 5311 . 5321 . 5331 stepped the movable support surfaces 531 . 532 . 533 spread out so that the movable support units 53 with a suitable angle, spread out the two vortices (not shown).
  • In summary, it should be noted that the invention comprises movable support units which form slots, which are movable from outside to inside, wherein when the pressure piece is moved by the screw, it first a movable support surface and then successively the other support surfaces with a suitable Angle spreads out. As a result, the wedge according to the invention can distribute the attack force when inserting and has a function of the height adjustment, so that the insertion can be made more energy-saving, precise and faster.
  • LIST OF REFERENCE NUMBERS
  • 10
    main body
    11
    toothed surface
    12
    incision
    121
    wider section
    13
    slot
    14
    movable support unit
    141, 143, 144
    movable support surface
    142
    frame-shaped movable support surface,
    1411, 1421
    guide surface
    1422
    shoulder
    1412
    drilling
    15
    longitudinal hole
    1421, 1411, 1431,
    sloping guide surface
    1421a, 1411a, 1431a
    stepped guide surface
    1421b, 1411b, 1431b
    arcuate guide surface
    21, 21a
    Pressure piece
    20
    screw
    30
    main body
    31
    toothed surface
    32, 335
    slot
    33
    movable support unit
    331, 332, 333
    movable support surface
    332, 334
    frame-shaped movable support surface
    3311, 3321, 3331, 3341
    guide surface
    40
    main body
    41
    toothed surface
    42
    incision
    43
    wider section
    44
    slot
    45
    movable support unit
    46
    frame
    451, 452
    movable support surface
    4511, 4521
    guide surface
    50
    main body
    51
    toothed surface
    52
    slot
    53
    movable support unit
    54
    frame
    531, 532, 533
    movable support surface
    55
    frame
    551
    wider section

Claims (10)

  1. Wedge for staged spreading, in particular for a lumbar spine implant comprising a main body ( 10 ) and a screw ( 20 ) in the main body ( 10 ) and at the end with a pressure piece ( 21 ), the main body ( 10 ) in the region of a peripheral side of the pressure piece ( 21 ) at least a first and a second movable support unit ( 14 ), each through a slot ( 13 ) at least one inner movable support surface ( 141 ) and an outer movable support surface ( 142 ), wherein upon movement of the pressure piece ( 21 ) of the pressure piece ( 21 ) first the inner movable support surface ( 141 ) can be spread out and then after a certain distance of movement of the pressure piece ( 21 ) the second support surface can be spread out, whereby the movable support units ( 14 ) with a suitable angle stagger the two adjacent vertebrae of a spine according to the distance between the two vertebrae.
  2. Wedge according to claim 1, characterized in that the movable support surfaces ( 141 . 142 ) on an inner side in each case a guide surface ( 1411 . 1421 ), which have a distance from each other and the pressure piece ( 21 ) being able to lead.
  3. Wedge according to claim 2, characterized in that the guide surfaces ( 1421a . 1411 . 1431a ) are formed stage.
  4. Wedge according to claim 2, characterized in that the guide surfaces ( 1421 . 1411 . 1431 ) are formed obliquely.
  5. Wedge according to claim 2, characterized in that the guide surfaces ( 1421b . 1411B . 1431B ) are arcuate.
  6. Wedge according to one of claims 1 to 5, characterized in that the main body ( 10 ) is formed cuboid with an upper and lower side and on the upper and lower sides in each case a toothed surface ( 11 ) and in the middle a transverse incision ( 12 ) which is open to the front, whereby an upper and lower movable support unit ( 14 ) are formed, wherein the movable support units ( 14 ) each by at least one slot ( 13 ) a movable support surface ( 141 ) and a frame-shaped movable support surface ( 142 ), wherein the incision ( 12 ) at the opening a wider section ( 121 ), by which the pressure piece ( 21 ) in the transverse direction and with the end of the screw ( 20 ), wherein the movable support surfaces ( 141 . 142 ) on the inside in each case a guide surface ( 1411 . 1421 ) with the incision ( 12 ) and the broad section ( 121 ), the guide surfaces ( 1411 . 1421 ) are spaced from each other, the guide surface ( 1411 ) of the inner movable support surface ( 141 ) on the inside of the pressure piece ( 21 ), wherein when the screw ( 20 ) and the pressure piece ( 21 ) is moved inwards, the pressure piece ( 21 ) by the guidance of the guide surfaces ( 1411 . 1422 ) gradual the movable support surfaces ( 141 . 142 ) spreads out, so that the movable support units ( 14 ) with a suitable angle spread the two vertebrae according to the distance between the two vertebrae.
  7. Wedge according to claim 6, characterized in that each outer movable support surface ( 142 ) at the opening of the incision ( 12 ) two shoulders ( 1422 ), which is a falling out of the pressure piece ( 21 ) prevent.
  8. Wedge according to one of claims 1 to 5, characterized in that the main body ( 30 ) is formed by a round cylinder, on the outside of a toothed surface ( 31 ) and by extending in the longitudinal direction of the round cylinder radial slots ( 32 ) at least two movable support units ( 33 ), each support unit ( 33 ) by at least one slot ( 335 ) a movable support surface ( 331 ) and a frame-shaped movable support surface ( 334 ), wherein the main body ( 30 ) in the middle along the longitudinal axis of an axle hole ( 34 ) having at the opening a wider section ( 35 ), wherein the spherical pressure piece ( 21a ) in the broader section ( 35 ) and with the end of the screw ( 20 ), the movable support surfaces ( 331 . 334 ) on the inside in each case a guide surface ( 3311 . 3341 ), which have a distance from each other, wherein the guide surface ( 3341 ) of the outermost movable support surface ( 334 ) on the inside of the pressure piece ( 21a ), wherein when the screw ( 20 ) and the pressure piece ( 21a ) is moved inwards, the pressure piece ( 21a ) by the guidance of the guide surfaces ( 3341 . 3311 ) gradual the movable support surfaces ( 334 . 331 ) spreads out, so that the movable support units ( 33 ) with a suitable angle spread the two vertebrae according to the distance between the two vertebrae.
  9. Wedge according to one of claims 1 to 5, characterized in that the main body ( 40 ) is formed cuboid with an upper and lower side and on the upper and lower sides in each case a toothed surface ( 41 ) and in the middle a transverse incision ( 42 ), which is formed in two stages and a front wider section ( 43 ), wherein the pressure piece ( 21 ) in the transverse direction through the wider section ( 43 ) and with the end of the screw ( 20 ), the upper and lower walls of the incision ( 42 ) through slots ( 44 ) two movable support units ( 45 ) and two fixed frames ( 46 ), each movable support unit ( 45 ) continue through slots ( 44 ) at least two outwardly inwardly reducing movable support surfaces ( 451 . 452 ), wherein the movable support surfaces ( 451 . 452 ) on the inside in each case a guide surface ( 4511 . 4521 ) with the incision ( 42 ) and the broad section ( 43 ), the guide surfaces ( 4511 . 4521 ) are spaced from each other, the guide surface ( 4521 ) of the inner movable support surface ( 452 ) on the inside of the pressure piece ( 21 ), wherein when the screw ( 20 ) and the pressure piece is moved inwards, the upper and lower frame ( 46 ) remain unmoved, the pressure piece ( 21 ) by the guidance of the guide surfaces ( 4521 . 4512 ) of the movable support surface ( 452 . 451 ) gradual the movable support surfaces ( 452 . 451 ) spreads out, so that the two movable support units ( 45 ) in the upper and lower frames ( 46 ) with a suitable angle spread the two vertebrae according to the distance between the two vertebrae.
  10. Wedge according to one of claims 1 to 5, characterized in that the main body ( 50 ) is formed by a round cylinder, on the outside of a toothed surface ( 51 ) and through the radial slots ( 52 ) at least two movable support units ( 53 ) and a fixed framework ( 54 ), each support unit ( 53 ) continue through slots ( 52 ) at least two outwardly inwardly reducing movable support surfaces ( 531 . 532 ), wherein the main body ( 50 ) in the middle along the longitudinal axis of an axle hole ( 55 ) having at the opening a wider section ( 551 ), wherein the spherical pressure piece ( 21a ) in the broader section ( 551 ) and with the end of the screw ( 20 ), wherein the movable support surfaces on the inside each have a guide surface ( 5311 . 5321 . 5331 ) with the axle hole ( 55 ) and the broader section ( 551 ) and are spaced from each other, wherein the guide surface ( 5311 ) of the outermost movable support surface ( 53 ) on the inside of the pressure piece ( 21a ), wherein when the screw ( 20 ) and the pressure piece ( 21a ) is moved inwards, the frames ( 54 ) remain unmoved, the pressure piece ( 21a ) by the guidance of the guide surfaces ( 5311 . 5321 ) gradual the movable support surfaces ( 531 . 532 ) spreads out, so that the movable support units ( 53 ) with a suitable angle spread the two vertebrae according to the distance between the two vertebrae.
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US10039650B2 (en) 2013-03-15 2018-08-07 In Queue Innovations, Llc Expandable fusion cage system

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US5554191A (en) * 1994-01-26 1996-09-10 Biomat Intersomatic vertebral cage
US20020143401A1 (en) * 2001-03-27 2002-10-03 Michelson Gary K. Radially expanding interbody spinal fusion implants, instrumentation, and methods of insertion
DE102005033608A1 (en) * 2005-07-14 2007-01-25 Medicon Eg, Chirurgiemechaniker-Genossenschaft Expanding lumbar implant, for insertion between vertebrae, has a body with legs spread apart by a moving slide
US20110282396A1 (en) * 2010-05-11 2011-11-17 Warsaw Orthopedic, Inc. Implant with deployable stabilizers

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US6207132B1 (en) 1998-12-04 2001-03-27 Chinese Petroleum Corporation Process for producing high purity hydrogen
TW414944B (en) 1999-08-18 2000-12-11 United Microelectronics Corp A method for forming planar silicon oxide layer on semiconductor chip

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Publication number Priority date Publication date Assignee Title
US5554191A (en) * 1994-01-26 1996-09-10 Biomat Intersomatic vertebral cage
US20020143401A1 (en) * 2001-03-27 2002-10-03 Michelson Gary K. Radially expanding interbody spinal fusion implants, instrumentation, and methods of insertion
DE102005033608A1 (en) * 2005-07-14 2007-01-25 Medicon Eg, Chirurgiemechaniker-Genossenschaft Expanding lumbar implant, for insertion between vertebrae, has a body with legs spread apart by a moving slide
US20110282396A1 (en) * 2010-05-11 2011-11-17 Warsaw Orthopedic, Inc. Implant with deployable stabilizers

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