TWI666007B - Expandable spinal interbody cage - Google Patents

Abstract

This article discloses a spinal packing block, which includes an upper plate, a lower plate, a screw, and two sliders. The screw includes a first section and a second section with external threads in opposite directions, and the upper plate is adjacent to the first section. And the second section each have a pair of upper plate slopes, and the lower plate has a pair of lower plate slopes adjacent to the first section and the second section, respectively; the screw is threaded and fits in the internal threads of the two sliders; And the two sliders are arranged in the middle of the upper plate and the lower plate; the two sliders respectively have two pairs of slider slopes, and the slider slopes cooperate with and abut one of the upper plate slopes and the lower plate slopes, respectively; When the screw is rotated, the two sliders are driven away from each other, and the upper plate and the lower plate are moved away from each other.

Description

Spreadable spinal pack

The present invention relates to spinal packing. Specifically, the present invention relates to an expandable spinal pack.

The human spine is composed of a plurality of vertebrae in series with an intervertebral disc, and the intervertebral disc is a tissue with extremely high water content, which can absorb the vertical pressure of the spine and provide a cushioning effect between the upper and lower spine. When any one of the discs becomes diseased or aging, it will cause the adjacent spinal nerves to be compressed and cause pain, which will cause inconvenience to the human body. For many problems caused by the above-mentioned intervertebral disc damage, the conventional technology provides a way to implant an artificial spinal packing block in the intervertebral body to solve the problem. However, a known type of spinal packing has a fixed height, which poses a limitation in reducing the size of a wound. An adjustable spinal packing block provided in the conventional technology is shown in FIG. 6, which is disclosed in US Patent Publication No. 2008/0140207. The conventional spinal packing block includes an actuating shaft 4000, an upper plate 1000, and a lower plate. Plate 2000 and two wedge members 3100 and 3200, by rotating the brake shaft 4000, the wedge members 3100 and 3200 approach each other in the axial direction of the brake shaft 4000 to contact the upper plate 1000 and the lower plate 2000, forcing The upper plate and the lower plate are separated to change the height of the spinal stuffing block. However, when adjusting the height of the conventional spinal packing block, one end of the brake shaft 4000 will protrude from the longitudinal ends of the upper plate 1000 and the lower plate 2000. This structure will increase the implant volume between the spinal vertebrae. When the block is placed between the vertebrae with the adjusted height shown in Figure 5, the protruding end of the brake shaft will have the opportunity to cause compression to the nerves or tissues adjacent to the vertebrae, and may also increase the spinal stuffing block implantation operation. Difficulty.

Based on the above-mentioned problem of spinal stuffing blocks, it is really necessary to provide an improved openable spinal stuffing block in the industry to reduce the volume of the spinal packing block as much as possible, and increase the height adjustment and the convenience of implantation surgery. Sex. An embodiment of the present invention provides a stretchable spinal packing block having a first end and a second end opposite to each other in a long axis direction, and a central region between the first end and the second end. The first side and the second side are opposite in the side direction, and have a height in a direction perpendicular to the long axis direction and the lateral direction, including an upper plate having a first upper plate surface and a second upper plate surface; It has a first lower plate surface far from the upper plate and a second lower plate surface close to the upper plate, wherein the first upper plate surface is farther from the lower plate than the second upper plate surface; a screw, It is arranged between the upper plate and the lower plate and has a first section and a second section, and these sections have an external thread, wherein the external thread of the first section and the external section of the second section The threads have opposite spiral directions; and a first slider and a second slider, wherein the first and second sliders are disposed between the upper plate and the lower plate and each include a through hole with an internal thread, and the internal The threads have opposite spiral directions, wherein the upper plates The section and the second section have a pair of first upper plate slopes and a pair of second upper plate slopes, and the upper plate slopes extend from the second upper plate surface in the direction of the first end and the second end toward the central area, respectively. To the first upper plate surface; the lower plate has a pair of first lower plate inclined surfaces and a pair of second lower plate inclined surfaces respectively in the first section and the second section adjacent to the screw, and the lower plate inclined surfaces are respectively at the first The ends and the second ends extend from the second lower plate surface to the first lower plate surface in the direction of the central area; the external thread of the first section of the screw is penetrated in the internal thread of the first slider, and the first The external threads of the two sections pass through the internal threads of the second slider; and the sliders each have two pairs of slider slopes, wherein the slider slopes of the first slider are adjacent to and abut against the slider. For the first upper plate inclined surface and the pair of first lower plate inclined surfaces, the slider inclined surfaces of the second slider are respectively adjacent to and abut against the pair of second upper plate inclined surfaces and the pair of second lower plate inclined surfaces, so that the When the screw rotates in one direction, the first slider moves away from the second slider, and the height of the spinal packing increases. . In an embodiment of the present invention, the pair of first upper plate inclined planes are parallel to the pair of second lower plate inclined planes, and the pair of second upper plate inclined planes are parallel to adjacent to the pair of first lower plate inclined planes, with respect to the vertical direction of the screw. One axis and one plane, the pair of first upper plate inclined planes and the pair of second upper plate inclined planes are mirror-symmetrical with respect to one plane perpendicular to one axis of the screw, the pair of first lower plate inclined planes and the pair of second lower plate inclined planes The plane is symmetrical with respect to the plane perpendicular to the axis of the screw. In one embodiment of the present invention, the upper plate of the spinal packing block has an upper plate protruding portion protruding toward the lower plate on the first side and the second side, respectively, and each of the upper plate protruding portions has an upper plate restricting member and a lower plate. The plate has lower plate protrusions on the first side and the second side, respectively, and the lower plate protrusions have lower plate restraints, wherein the slider, the upper plate, and the lower plate are configured such that When the sliders move on the screw, the sliders do not exceed the upper plate and the lower plate in the long axis direction. In an embodiment of the present invention, the upper plate includes at least one upper plate guide member, and the at least one upper plate guide member is correspondingly disposed near one of the upper plate inclined surfaces, and the at least one upper plate guide The member is parallel to the corresponding upper plate inclined surface; the lower plate includes at least a lower plate guiding member, and the at least lower plate guiding member is correspondingly disposed adjacent to one of the lower plate inclined surfaces, and the at least lower plate guiding member is parallel On the corresponding lower plate slope; and the sliders respectively include at least two slider guide members, the slider guide members cooperate with the upper plate guide member and the lower plate guide member, wherein the slider guide The guide members are correspondingly disposed adjacent to one of the slanted surfaces of the sliders, and the slider guide members cooperate with the upper plate guide member and the lower plate guide member to guide the sliders and the upper plate and The relative movement between the lower plates. In one embodiment of the present invention, the slider guide members are convex rails and the upper plate guide member and the lower plate guide member are grooves, or the slider guide members are grooves and the upper plate guide members are grooves. The plate guide member and the lower plate guide member are convex rails. In one embodiment of the present invention, the length of the screw is less than or equal to the length in the long axis direction of the upper plate and the lower plate, that is, the screw is disposed between the upper plate and the lower plate so that the length in the long axis direction does not exceed the length of the upper plate and the lower plate. board. In an embodiment of the present invention, the second upper plate surface has an upper plate arc groove on the first end and the second end, respectively, and the second lower plate surface is on the first end and the first end. The two ends each have a lower plate arc groove. When the screw is rotated in the other direction to bring the first slider closer to the second slider and the height of the spine filling block is reduced, the upper plate arc groove and the lower plate arc groove are used for When the screw is accommodated, and when the height of the spinal packing block is closed to a minimum, the upper plate arc groove and the lower plate arc groove respectively form a circular hole surrounding the screw. In an embodiment of the present invention, one or each of the upper plate and the lower plate has a curved surface, and the curved surface is configured by the first upper plate surface or the first lower plate separately or individually near the central region through the configuration. The surface extends toward the first end, so that the thickness of the upper plate and the lower plate near the first end is gradually reduced. In one embodiment of the present invention, one of the pair of first upper plate inclined surfaces and one of the pair of second upper plate inclined surfaces are located on a first side, and one of the pair of first upper plate inclined surfaces is One of the pair of first lower plate slopes and one of the pair of second lower plate slopes are on the second side; and one of the pair of second upper plate slopes is on the second side; The lower plate inclined surface is located on the first side, and the other lower plate inclined surface of the pair of second lower plate inclined surfaces and the other lower plate inclined surface of the pair of second lower plate inclined surfaces are located on the second side. In an embodiment of the present invention, an angle is formed between the first upper plate surface and the first lower plate surface to set an included angle between the first upper plate surface and a desired supporting plane of the first lower plate surface. In an embodiment of the present invention, an angle formed between the first upper plate surface and the first lower plate surface is 0 degrees to 25 degrees, or 0 degrees to 12 degrees. Another embodiment of the present invention provides a stretchable spinal stuffing block comprising: an upper plate having a sawtooth structure with a plurality of upper plate slopes; a lower plate having a sawtooth structure with a plurality of lower plate slopes; A screw is provided between the upper plate and the lower plate and has a first section and a second section, and the sections have external threads, respectively, wherein the external threads of the first section and the second section are The external threads of the segments have opposite spiral directions; and a first slider and a second slider, wherein the sliders are disposed between the upper plate and the lower plate and each include a through hole with an internal thread, the The equal internal threads have opposite spiral directions, in which the external threads of the screw thread fit in the internal threads of the first slider and the second slider, and the screw, the first slider, and the second slider are arranged Between the upper plate and the lower plate; and the inclined surfaces of the upper plates face the lower plate, the inclined surfaces of the lower plates face the upper plate, and the first slider and the second slider each include at least two sliders. Bevels, the slanted surfaces of the sliders abut the upper bevels and the lower One of the inclined surfaces, wherein the upper plate inclined surface, the lower plate inclined surface, and the slider inclined surfaces are configured so that when the screw rotates in the long axis direction, the first slider and the second slider are driven away from each other, and The upper plate is moved away from the lower plate in a vertical direction. In an embodiment of the present invention, the spinal packing has a first cross-sectional area at a first end along the long axis direction, and a second cross-sectional area at a second end along the long axis direction, wherein the first The cross-sectional area is smaller than the second cross-sectional area. In an embodiment of the present invention, the spinal packing block includes a first upper plate surface and a first lower plate surface, wherein the first upper plate surface is located at an end in the vertical direction, and the first lower plate surface is located in the vertical direction. At the other end, an angle is formed between the first upper plate surface and the first lower plate surface to set an included angle between the first upper plate surface and the plane to be supported by the first lower plate surface. With the expandable spinal pack of the present invention, the height of the spinal pack can be continuously, smoothly and stably increased or decreased by rotating the screw to match the intervertebral height of different patients, thereby providing more stable support. Sex. In addition, in the process of adjusting the height of the spinal stuffing block, the screw and the slider do not exceed the upper and lower plates of the spinal stuffing block in the longitudinal direction, which can avoid the protrusion of the upper and lower plates due to the screw in the long axis direction. Structure, which increases the risk of compressing adjacent spinal nerve tissue, and provides a smaller front end area of the curved surface at the first end of the upper and lower plates in the present invention for guiding the implantation of the spinal filler, making the surgical process easier.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the content of the embodiments of the present application is only used to illustrate a specific aspect of the present invention, and is not intended to limit the scope of the claimed invention. First, refer to FIGS. 1 and 2. The three-dimensional views of the spinal packing block 1 according to an embodiment of the present invention at the minimum height and in the extended state are disclosed. In order to clearly explain an embodiment of the present invention, a longitudinal axis direction X, a lateral direction Y, and a vertical direction Z of the spinal packing block 1 are defined. As shown, the spinal pack 1 includes a first end 11, a second end 12, a first side 13, and a second side 14, wherein the first end 11 and the second end 12 are on the long axis of the spinal pack 1 Opposite in the direction X, the first side 13 and the second side 14 are opposite in the lateral direction Y of the spinal pack 1, and the spinal pack 1 has a distance between the first end 11 and the second end 12. A central region and a height in the vertical direction Z. As shown in FIG. 1, the spinal packing block 1 has an upper plate 100, a lower plate 200, a first slider 310, a second slider 320, and a screw 400, wherein the first slider 310, the second slider 320, and the screw 400 It is disposed between the upper plate 100 and the lower plate 200. By rotating the screw 400 clockwise in the direction of the long axis, the first slider 310 and the second slider 320 move on the screw 400 in the long axis direction X to move away from each other, and drive the upper plate 100 to move away in the vertical direction Z. The lower plate 200 can be adjusted to the open state as shown in FIG. 2 by the spinal packing block 1 of FIG. On the other hand, the screw 400 can also be rotated counterclockwise in the long axis direction, so that the upper plate 100 approaches the lower plate 200 in the vertical direction Z, and the height of the spinal packing block 1 is shortened. The change in the distance between the upper plate 100 and the lower plate 200 of the spinal packing block in the Z direction is related to the setting of the filling block height when the human spine is packed in the future. The relationship between the clockwise and counterclockwise rotation of the screw 400 and the distance between the upper plate 100 and the lower plate 200 away from or close to each other can be adjusted according to the needs. It is worth mentioning that the spinal packing block 1 of the present invention can continuously adjust the upper plate 100 away from or close to the lower plate 200, which is easier to set the spinal packing block 1 according to the needs during implantation compared with the stepwise adjustment method. height. The continuous adjustment method referred to in this case means that the spinal packing block 1 can be fixed at any height as needed within a certain height range. In contrast, in the step adjustment method, the spinal packing block 1 can only be fixed in conjunction with the structural design. Several pre-designed heights. Hereinafter, the detailed structure of the spinal packing block 1 according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4 at the same time. Among them, FIG. 3 shows an exploded perspective view of the spinal packing block of FIG. 1 in a top view, and FIG. 4 shows an exploded perspective view of the spinal packing block of FIG. 1 in a bottom view. In order to facilitate the insertion of the spinal packing 1 between the human spine, it is preferable that the distance between the outer surface of the upper plate 100 and the lower plate 200 is smaller near the first end 11 and then gradually increase toward the central area. . As shown in FIGS. 3 and 4, the upper plate 100 has a first upper plate surface 101 and a second upper plate surface 102. The first upper plate surface 101 is farther from the lower plate 200 than the second upper plate surface 102. On the other hand, the lower plate 200 has a second lower plate surface 202 that faces the upper plate 100 and a first lower plate surface 201 that faces away from the upper plate 100. The upper plate 100 and the lower plate 200 further have a curved surface 101 ′ and 201 ′, respectively. These curved surfaces 101 ′ and 201 ′ extend from the first upper plate surface 101 and the second upper plate surface 102 toward the first surface near the central area, respectively. In the direction of the tip 11, the second upper plate surface 102 and the second lower plate surface 202 are gradually approached, respectively, so that the distances of the curved surfaces 101 ′ and 201 ′ at the first end 11 are smaller than those of the curved surfaces 101 ′ and 201 ′. The distance at the central area. It is also possible to provide only one curved surface 101 'or 201'. With the setting of the above curved surface, the spinal stuffing block has a smaller area (thickness) at the first end compared to the Z-axis cross section of the second end or the central region. Therefore, during the implantation operation, the first end 11 Placed between the human body or vertebral vertebrae, and guided by the curved surfaces, the entire spinal block implantation process is easier. It should be noted that the present invention can also provide a curved surface only on the upper plate 100 or the lower plate 200 to provide a smaller front end area (first cross-sectional area) at the first end and a larger area at the second end ( Second cross-sectional area). In addition, the first upper plate surface 101 and the first lower plate surface 201 may each have a plurality of grooves and have a zigzag shape, so as to increase the friction between the spinal packing block 1 and the vertebral bone, and prevent the spinal packing block 1 from being implanted. The human body slides between the spinal bones. The upper plate 100 and the lower plate 200 respectively have at least one through hole 150 and 250 for filling autogenous bone or artificial bone tissue to achieve a better bone fusion rate. In the spirit of the present invention, the through holes 150 and 250 may be replaced with a concave shape as required. As shown in FIGS. 3 and 4, the screw 400 includes a first section 410, a second section 420, and a partition member 430 located between the sections. Among them, the partition member 430 provides two functions, one is a section When the first section 410 and the second section 420 of the divided screw 400 move the first slider 310 and the second slider 320 along the long axis X toward each other on the screw 400, they can only reach their respective areas at most. The end of the central part of the segment; another function is to provide the positioning of the first slider 310 and the second slider 320 on the screw 400 relative to the upper plate 100 and the lower plate 200. This function is provided by the partition member 430 on the screw 400. An annular lateral protruding portion is formed in the middle, and this protruding portion is restricted to be reached in the guide groove 233 formed by either the upper or lower plate. The first section 410 and the second section 420 have external threads in opposite directions. In addition, the screw 400 further includes an operating end 440. The operating end 440 has, for example, an external hexagon, a square, or a plum-shaped structure, and the screw 400 can be rotated by a tool having a matching, such as an internal hexagon structure. The upper plate 100 has a pair of first upper plate slopes 110 and a pair of second upper plate slopes 110 'adjacent to the first section 410 and the second section 420 of the screw 400, respectively, and the upper plate slopes 110 and 110 'In the directions of the first end 11 and the second end 12 toward the central region, respectively, the second upper plate surface 102 extends toward the first upper plate surface 101. The lower plate 200 has a pair of first lower plate slopes 210 and a pair of second lower plate slopes 210 'adjacent to the first section 410 and the second section 420 of the screw 400, respectively. The lower plate slopes 210 and 210 'In the directions of the first end 11 and the second end 12 toward the central area, respectively, the second lower plate surface 202 extends toward the first upper plate surface 201. Among them, in one embodiment of the present invention, as shown in FIGS. 3 and 4, one of the first upper plate inclined surface 110 and the second upper plate inclined surface 110 ′ are located on the first side. 13 and the other upper plate slope of the first upper plate slope 110 and the other upper plate slope of the pair of second upper plate slopes 110 'are located on the second side 14; one of the first lower plate slopes 210 is under One of the lower plate slope and the second lower plate slope 210 'is located on the first side 13, and the other lower plate slope of the pair of second lower plate slopes 210 and the second lower plate slope 210' The other lower plate slope is located on the second side 14. The functions of the first and second upper plate slopes 110, 110 'and the first and second lower plate slopes 210, 210' will be further explained below. In addition, the upper plate 100 further includes an upper plate protrusion 130 on the first side 13 and the second side 14, respectively, wherein the upper plate protrusion 130 protrudes toward the lower plate 200 and has an upper plate restricting member 131, and the lower plate The plate 200 further includes a lower plate protrusion 230 on the first side 13 and the second side 14, respectively. The lower plate protrusion 230 protrudes toward the upper plate 100 and has a lower plate restriction 231 and a groove 232. The upper plate restricting member 131 and the lower plate restricting member 231 are configured and cooperate with each other to define a maximum distance between the first upper plate surface 101 and the first lower plate surface 201, that is, a height of the spinal packing block 1 The maximum value to avoid the upper plate 100 completely detaching from the lower plate 200 during the spreading process. Wherein, the upper plate restricting member 131 is a lateral projection of the upper plate protruding portion 130, which is disposed in the groove 232 of the lower plate protruding portion 230 and abuts against the lower plate restricting member 231 by the lower plate protruding portion 230. The upper plate restricting member 131 defines the maximum height of the spinal packing block 1. It is worth mentioning that the upper plate restricting member 131 and the lower plate restricting member 231 respectively have an inclined surface facing one side of the lower plate and the upper plate, so that when the spinal packing block 1 is combined, the upper plate is guided and set by the inclined surface The restricting member 131 is disposed in the groove 232 of the lower plate protruding portion 230 through the lower plate restricting member 231. It should be noted that the upper plate protrusion and the lower plate protrusion of the present invention are not limited to the design of the above embodiment, and under the spirit of the present invention, various equivalent modifications or replacements are also included. For example, the upper plate protrusion The top and bottom plate protrusions may define the maximum height of the spinal packing block 1 only by respective bumps or various forms of bumps and / or grooves. Referring to FIGS. 1 and 2 again, the upper plate protrusion 130 and / or the lower plate protrusion 230 can be used when the screw rotates in one direction and the upper plate 100 approaches the lower plate 200 until the spinal packing block has a minimum height (as shown in the figure). 1) The upper plate protrusions 130 and / or the lower plate protrusions 230 abut one side of the sliders 310 and 320 in the long-axis direction X, and the sliders 310 and 320 are restricted from being closer to each other. The first slider 310 and the second slider 320 respectively include a through hole 311 and 321 with an internal thread. The external thread of the first section 410 of the screw 400 is threadedly fitted into the internal thread of the first slider 310, and the screw The outer thread of the second section 420 of 400 is threaded and fits into the inner thread of the second slider 320, and the sliders are disposed between the upper plate 100 and the lower plate 200. In addition, the first slider 310 has two pairs of slider inclined surfaces 312 and 312 'opposite to each other in a side direction, and the second slider 320 also has two pairs of slider inclined surfaces 322 and 322' opposite to each other in a side direction. 2 and 3, the structures of the first slider 310 and the second slider 320 may be substantially the same, and the slider slopes 312 and 312 'of the first slider 310 are adjacent to and abut the first upper plate slope 110, respectively. And the first lower plate inclined surface 210, the slider inclined surfaces 322 and 322 'of the second slider 320 are adjacent to and abut the second upper plate inclined surface 110' and the second lower plate inclined surface 210 ', respectively. With the above arrangement, when the screw 400 rotates, because the first section 410 and the second section 420 have external threads in opposite directions, the first slider 310 and the second slider 320 move in the long axis direction of the screw 400 and Move away from each other or close to each other, and by the above-mentioned configuration of the slider slope, the upper plate slope, and the lower plate slope, the movement of the sliders away from each other causes the first upper plate surface 101 to be far away from the first lower plate surface 102 (also That is, the height of the spinal pack 1 gradually increases), and the movement of the sliders closer to each other makes the first upper plate surface 101 closer to the first lower plate surface 102 (that is, the height of the spinal pack 1 gradually decreases). In other words, by rotating the screw 400 clockwise or counterclockwise, the height of the spinal packing block of the present invention is continuously increased or decreased continuously. It is worth mentioning that the pair of first upper plate inclined surfaces 110 is parallel to the pair of second lower plate inclined surfaces 210 ′, and the pair of second upper plate inclined surfaces 110 ′ is parallel to the pair of first lower plate inclined surfaces 210. In addition, with respect to the plane (YZ plane) of the axis A of the vertical screw 400, the pair of first upper plate inclined surfaces 110 and the pair of second upper plate inclined surfaces 110 'are mirror-symmetrical, and the pair of first lower plate inclined surfaces 210 and the pair The second lower plate slope 210 'is also mirror-symmetrical. Therefore, when the first slider 310 and the second slider 320 are moved on the screw 400, the slopes of the sliders continuously abut against the upper slopes 110, 110 'or the lower slopes 210, 210', respectively. One is to continuously, smoothly and stably change the height of the spinal packing block 1 and provide a more stable support for the overall structure of the spinal packing block. Furthermore, in an embodiment of the present invention, the length of the screw 400 is less than or equal to the longitudinal length of the upper plate 100 and the lower plate 200, and the screw 400 is disposed between the upper plate 100 and the lower plate 200, so that the spine is adjusted in the above-mentioned manner. In the process of filling the block 1, the screw 400 is maintained between the two ends of the upper plate 100 and the lower plate 200 (that is, the screw 400 does not exceed the upper plate 100 and the lower plate 200 in the longitudinal direction X). In another embodiment of the present invention, the spine filling block 1 can also be designed, for example, adjusting the slider slopes 312, 312 ', 322, 322', the upper and lower plate slopes 110, 110 ', 210, 210. ', Or upper plate restriction 131 and lower plate restriction 231, so that when the screw 400 is rotated to move the sliders away from each other to reach the maximum height defined by the upper plate and lower plate restrictions, the slider does not exceed the upper plate and The two ends of the lower plate, so the overall longitudinal length of the spinal filler 1 remains constant during the height adjustment process, which is beneficial to avoid the structure of the upper plate and the lower plate protruding in the longitudinal direction X. Nerves or tissues cause compression. In addition, the second upper plate surface 102 has an upper plate arc groove 140 at the first end 11 and the second end 12, respectively, and the second lower plate surface 202 may have a lower plate arc at the first end 11 and the second end 12, respectively.形 槽 240。 The groove 240. When the spinal packing block 1 is adjusted to be less than a certain height, the upper plate arc groove 140 and the lower plate arc groove 240 can just accommodate the screw 400. As shown in FIG. 1, when the upper plate 100 is closest to the lower plate 200 and the height of the spinal packing block 1 has a minimum value, the upper plate arc groove 140 and the lower plate arc groove 240 are at the first end 11 and the second end, respectively. 12 cooperates to form a circular hole in the first end 11 and the second end 12 which completely accommodates and surrounds the screw 400. In addition, the upper plate 100 and the lower plate 200 respectively include intermediate inclined surfaces 141 and 241 adjacent to the upper plate curved groove 240 and the lower plate curved groove 240 at the first end 11 and the second end 12, respectively, and the intermediate inclined surfaces 141 and 241 are respectively The first and second ends 11 and 12 extend from the second upper plate surface 102 to the first upper plate surface 101 and from the second lower plate surface 202 to the first lower plate surface 201 in the direction of the central area, and the The equal middle slopes 141 and 241 are respectively parallel to the adjacent first upper plate slope 110, the second upper plate slope 110 ', the first lower plate slope 210, or the second lower plate slope 210'. On the other hand, the sliders 310 and 320 include intermediate inclined surfaces 314 and 324 adjacent to the through hole 311, respectively. Therefore, when the sliders 310 and 320 move relative to the upper plate 100 and the lower plate 200, the intermediate inclined surfaces 314 and 324 of the sliders abut against and cooperate with the intermediate inclined surfaces 141 and 241 of the upper plate 100 and the lower plate 200. In order to make the upper plate 100 move away from or close to the lower plate 200 by the distance or approach between the sliders 310 and 320, and provide a more stable supporting force of the spinal packing block 1 in the vertical direction Z and the long axis direction X. Referring again to FIGS. 3 and 4, the upper plate 100 may further include upper plate guide members 120, which are respectively disposed laterally adjacent to the upper plate slopes 110, 110 ′ and correspondingly. Groove, the lower plate 200 may include a lower plate guide member 220, which are correspondingly provided as side grooves adjacent to the lower plate slopes 210, 210 ', and The upper plate guide member 120 and the lower plate guide member 220 are respectively parallel to the corresponding upper plate inclined surfaces 110, 110 'or the lower plate inclined surfaces 210, 210', respectively. On the other hand, the sliders include slider guide members 313 and 323, respectively, which are correspondingly provided as side convex tracks adjacent to the slider slopes 312, 312 ', 322, and 322', and the slider guides The lead members 313 and 323 are parallel to the corresponding slider slopes 312, 312 ', 322, and 322', respectively. The convex guides of the slider guide members 313 and 323 are respectively disposed in the grooves of the upper plate guide member 120 and the lower plate guide member 220. Thereby, when the sliders 310 and 320 are rotated away from or close to each other by rotating the screw 400, the projections of the slider guide members 313 and 323 are guided by the grooves to move in the groove direction, respectively. In the lateral Y direction and in directions other than the axial direction of the upper plate inclined surface or the lower plate inclined surface, the movement of the sliders relative to the upper plate or the lower plate is restricted by the upper plate and the lower plate guide member. It should be noted that, although the present plan shows four upper plate guide members 120 and four lower plate guide members 220 corresponding to the upper plate inclined surface 110 and the lower plate inclined surface 210, respectively, the spinal packing block of the present invention is not limited to a specific number The upper plate guide member or the lower plate guide member, for example, may also have a single upper plate guide member and a single lower plate guide member and the slider guide members of the first slider and the second slider, respectively. Cooperate. In addition, the lower plate 200 has a guide groove 233 in a central region of the second lower plate surface 202, and the guide groove 233 is a lateral groove perpendicular to the second lower plate surface 202 to receive the partition of the screw 400. Component 430. Thus, when the screw 400 is rotated to separate the upper plate 100 and the lower plate 200 and the height of the spinal packing block 1 is increased, the partition member 430 of the screw 400 is restricted from moving in the guide groove 233, and the screw 400 is restricted to only It can move relatively to the upper plate 100 and the lower plate 200 in the vertical direction Z. With the above setting, the spinal packing block 1 of the present invention can achieve the effect of continuously, smoothly and stably adjusting the height of the spinal packing block through the setting of the slanted surfaces of the sliders, the slanted surfaces of the upper plate, and the slanted surfaces of the bottom plate, and Provide more stable support for the overall structure of the spinal stuffing block. In addition, when adjusting the height of the spinal packing block 1 of the present invention, the screw 400 and the sliders 310 and 320 do not exceed the two ends of the upper plate 100 and the lower plate 200 to reduce the volume of the spinal packing block. And to avoid compressing the nerves or tissues adjacent to the spinal ganglion. In addition, referring to FIGS. 5A to 5D, the first upper plate surface and the second upper plate surface may be set to have an angle θ of, for example, 0 ° to 15 ° with each other in the screw direction (X) to meet the needs of the surgery to provide a spinal segment. Bone support at specific angles. 5A to 5D illustrate a spinal stuffing block of this embodiment, in which the same elements use the same reference numerals as those of the previous embodiment. As an example, the above plate 100 is close to the lower plate 200 until the spinal packing block has a minimum height. At this time, the upper plate 100 and the lower plate 200 abut against the first slider 310 and the second slider 320, respectively. The upper plate 100 can be changed by And the thickness of the lower plate 200 near the first end 11 and the second end 12, or directly change the first upper plate surface 101 and the first plate when the upper plate 100 and the lower plate 200 are not bonded to each other in the Z direction. The shape or angle of the two upper plate surfaces 201 makes the first upper plate surface 101 and the second upper plate surface 201 form an angle, and the angle may be θ ₀ , θ ₁ , θ ₂ or θ ₃ , where θ ₀ is 0 ° , Θ ₁ is 4 °, θ ₂ is 8 °, and θ ₃ is 12; or, θ ₃ may be 20 ° or 25 °. With the above-mentioned configuration, the spinal stuffing block of the present invention can set the included angle of the plane on which the first upper plate surface 101 and the second upper plate surface 201 can provide support, so as to provide a support function for the upper and lower spine bones at a specific angle state. It should be understood that the present invention is not limited to the specific structures or arrangements disclosed herein. Those having ordinary knowledge in the technical field to which the present invention pertains should understand that in the spirit of the present invention, these structures and arrangements disclosed herein are to a certain extent. The above may be changed or replaced. It should also be understood that the terms and terms used to describe the direction or relative position used herein are only used to describe specific embodiments and to facilitate description and understanding, and are not intended to limit the scope of the invention; the scope of the invention is only limited by the scope of the accompanying patent application And its equivalent settings.

1‧‧‧Spine Filler

11‧‧‧ first end

12‧‧‧ second end

13‧‧‧first side

14‧‧‧ the second side

100‧‧‧ on board

101‧‧‧First upper surface

101'‧‧‧ Surface

102‧‧‧Second upper surface

110‧‧‧First upper plate bevel

110'‧‧‧ Second upper plate bevel

120‧‧‧ Upper plate guide member

130‧‧‧ Upper plate protrusion

131‧‧‧ Upper plate restriction

140‧‧‧ Upper plate arc groove

141‧‧‧ middle bevel

150‧‧‧through hole

200‧‧‧ lower plate

201‧‧‧First lower surface

201'‧‧‧ Surface

202‧‧‧Second lower surface

210‧‧‧The first lower plate slope

210'‧‧‧ Second lower plate bevel

220‧‧‧ Lower plate guide member

230‧‧‧ lower plate protrusion

231‧‧‧ Lower plate limiter

232‧‧‧Groove

233‧‧‧Guide groove

240‧‧‧ lower plate arc groove

250‧‧‧through hole

310‧‧‧The first slider

311‧‧‧through hole

312‧‧‧ slider slope

312'‧‧‧ slider ramp

313‧‧‧Slider guide member

314‧‧‧ middle bevel

324‧‧‧ middle bevel

320‧‧‧Second slider

321‧‧‧through hole

322‧‧‧ slider ramp

322'‧‧‧ slider ramp

323‧‧‧Slider guide member

400‧‧‧Screw

410‧‧‧Section 1

420‧‧‧Second Section

430‧‧‧Segmentation component

440‧‧‧End of operation

1000‧‧‧ on board

2000‧‧‧ lower plate

3100‧‧‧ slider

3200‧‧‧ slider

4000‧‧‧ actuation shaft

A‧‧‧axis

X‧‧‧ Long axis direction

Y‧‧‧ lateral direction

Z‧‧‧ vertical

θ ₀ ‧‧‧ angle

θ ₁ ‧‧‧ angle

θ ₂ ‧‧‧ angle

θ ₃ ‧‧‧ angle

The drawings described below are for illustrative purposes only and are not intended to limit the scope of the invention in any way. FIG. 1 depicts a perspective view of a spinal packing block according to an embodiment of the present invention. FIG. 2 depicts a perspective view of an unfolded state of a spinal packing in accordance with an embodiment of the present invention. FIG. 3 depicts an exploded view of a spinal packing block according to an embodiment of the present invention in a top view. FIG. 4 depicts an exploded view of a spinal packing block according to an embodiment of the present invention from a bottom perspective. 5A to 5D depict side views of spinal stuffing blocks according to different embodiments of the present invention. FIG. 6 depicts a schematic view of a spinal stuffing block according to a conventional technique.

Claims (23)

A spinal packing block (1) has a first end (11) and a second end (12) opposite to each other in a long axis direction (X) and a center between the first end and the second end The region has a first side (13) and a second side (14) opposite in a lateral direction (Y), and has a height in a direction perpendicular to the longitudinal direction and the lateral direction, including: A plate (100) having a first upper plate surface (101) and a second upper plate surface (102); a lower plate (200) having a first lower plate surface (201) facing away from the upper plate and facing A second lower plate surface (202) of the upper plate; the first upper plate surface (101) is farther from the lower plate (200) than the second upper plate surface (102); wherein the upper plate is in the first One side (13) and the second side (14) each have an upper plate protrusion (130) protruding toward the lower plate, and each of the upper plate protrusions has an upper plate restriction (131), the lower plate Each of the first side (13) and the second side (14) has a lower plate protrusion (230) protruding toward the upper plate, and the lower plate protrusions each have a lower plate restriction (231), wherein the The upper plate restraint (131) and the lower plate restraint (231) are configured to Setting a maximum value of the height of the spinal packing block; and a screw (400) disposed between the upper plate (100) and the lower plate (200) and having a first section (410) and a first section Two sections (420), each of which has an external thread, wherein the external thread of the first section and the external thread of the second section have opposite spiral directions; and a first slider (310) And a second slider (320), wherein the first and second sliders are disposed between the upper plate and the lower plate and each include a through hole (311, 321) with an internal thread, and the internal threads have opposite In which the upper plate (100) has a pair of first upper plate slopes (110) at the first section (410) and the second section (420) adjacent to the screw (400), respectively And a pair of second upper plate slopes (110 '), the upper plate slopes (110, 110') are respectively moved by the second end in the direction of the first end (11) and the second end (12) toward the central area The upper plate surface (102) extends to the first upper plate surface (101); the lower plate (200) is respectively in the first section (410) and the second section (420) adjacent to the screw (400). There are a pair of first lower plate inclined surfaces (210) and a The second lower plate slope (210 '), the first and second lower plate slopes (210, 210') are respectively formed by the first end (11) and the second end (12) in a direction toward the central area by the first The two lower plate surfaces (202) extend to the first lower plate surface (201); the external threads of the sections (410, 420) of the screw (400) are respectively threaded and fitted to the first slider (310) And the internal thread of the second slider (320); and the first slider (310) and the second slider (320) have two pairs of slider slopes (312, 312 ', 322, 322'), wherein the first The slider slopes (312, 312 ') of the slider (310) are adjacent to and abut the pair of first upper plate slopes (110) and the pair of first lower plate slopes (210), respectively, and the second slider (320) The slider slopes (322, 322 ') of) are adjacent to and abut the pair of second upper plate slopes (110') and the pair of second lower plate slopes (210 '), respectively. When the screw rotates in one direction, the The first slider (310) is far from the second slider (320), and the height of the spinal stuffing block increases. For example, the spinal packing block of claim 1, wherein the pair of first upper plate slopes (110) are parallel to the pair of second lower plate slopes (210 '), and the pair of second upper plate slopes (110') are parallel to the pair Lower plate slope (210), wherein the pair of first upper plate slopes (110) and the pair of second upper plate slopes (110 ') are mirror-symmetrical with respect to a plane perpendicular to one axis (A) of the screw, and the pair The first lower plate inclined surface (210) and the pair of second lower plate inclined surfaces (210 ') are mirror-symmetrical with respect to the plane perpendicular to the axis (A) of the screw. For example, the spine filling block of item 1, wherein the sliders (310, 320), the upper plate and the lower plate are configured so that the sliders do not exceed the long axis direction when they are moved on the screw (400). The upper plate (100) and the lower plate (200). The spinal packing block of claim 1, wherein the screw (400) includes an operating end (440) having an outer hexagonal structure to rotate the screw through the operating end. For example, the spinal stuffing block of claim 1, wherein the upper plate includes at least one upper plate guide member (120), and the at least one upper plate guide member is correspondingly disposed adjacent to one of the upper plate inclined surfaces and is parallel The corresponding upper plate slope; the lower plate includes at least a lower plate guide member (220), the at least lower plate guide member is correspondingly disposed adjacent to one of the lower plate slopes (210) and parallel to the lower plate; Corresponding to the slope of the lower plate; and the first slider and the second slider each include at least one slider guide member (313,323), wherein the slider guide members are correspondingly disposed adjacent to the slider slopes One, and cooperate with the upper plate guide member (120) and the lower plate guide member (220) to guide a relative movement between the sliders and the upper plate and the lower plate. If the spine packing block of item 5 is requested, wherein the slider guide members (313,323) are convex rails and the upper plate guide member (120) and the lower plate guide member (220) are grooves, or such The slider guide members (313, 323) are grooves, and the upper plate guide member (120) and the lower plate guide member (220) are raised rails. For example, the spinal stuffing block of item 1, wherein the length of the screw is less than or equal to the major axis length of the upper plate and the lower plate. For example, the spinal stuffing block of claim 1, wherein the second upper plate surface has an upper plate arc groove (140) at the first end and the second end, respectively, and the second lower plate surface is at the first The distal end and the second distal end respectively have a lower plate arc groove (240), wherein when the screw is rotated in the other direction, the first slider (310) approaches the second slider (320), and the spinal packing block When the height decreases, the upper plate arc grooves and the lower plate arc grooves are used to accommodate the screw (400). If the spinal packing block of item 8 is requested, when the height of the spinal packing block is closed to a minimum, the upper plate arc grooves and the lower plate arc grooves respectively form a circular hole surrounding the screw. For example, the spine packing block of claim 1, wherein one or each of the upper plate and the lower plate has a curved surface (101 ', 201'), and the curved surface (101 ', 201') is configured near the center. The areas extend individually or individually from the first upper plate surface (101) or the first lower plate surface (201) toward the first end, so that the thickness of the upper plate and the lower plate near the first end gradually decreases. The spine packing block of claim 1, wherein one of the pair of first upper plate slopes (110) and one of the pair of second upper plate slopes (110 ') are located on the first side ( 13), and the other upper plate inclined surface of the pair of first upper plate inclined surfaces (110) and the other upper plate inclined surface of the second upper plate inclined surfaces (110 ') are located on the second side (14); and One of the pair of first lower plate slopes (210) and one of the pair of second lower plate slopes (210 ') are located on the first side (13), and the pair of second lower plates The other lower plate inclined surface of the inclined surface (210) and the other lower plate inclined surface of the pair of second lower plate inclined surfaces (210 ') are located on the second side (14). For example, the spinal stuffing block of item 1, wherein an angle is formed between the first upper plate surface (101) and the first lower plate surface (201) to set the first upper plate surface (101) and the first The included angle of the plane to be supported by the lower plate surface (201). For example, the spine filling block of item 12, wherein the angle formed between the first upper plate surface (101) and the first lower plate surface (201) may be one of the following: (1) 0 degrees to 12 Degrees, (2) 0 degrees to 25 degrees. A spinal stuffing block includes: an upper plate (100) having a plurality of upper plate slopes; a lower plate (200) having a plurality of lower plate slopes; the upper plate protruding from a pair of upper plates protruding toward the lower plate; (130), the upper plate protrusions are laterally opposed and each has an upper plate restriction (131), the lower plate has a pair of lower plate protrusions (230) protruding toward the upper plate, and the lower plates The protrusions are laterally opposed and have lower plate restraints (231), wherein the upper plate restraints (131) and the lower plate restraints (231) are configured to define a height of the spinal packing block. Maximum value; and a screw (400) disposed between the upper plate (100) and the lower plate (200) and having a first section (410) and a second section (420), such zones The segments each have an external thread, wherein the external thread of the first section and the external thread of the second section have opposite spiral directions; and a first slider (310) and a second slider (320), The sliders are disposed between the upper plate and the lower plate and each include a through hole (311,321) with an internal thread. The internal threads have opposite spiral directions. : The external threads of the screw (400) are threaded through the internal threads of the first slider (310) and the second slider (320), and the screw (400), the first slider The block (310) and the second slider (320) are disposed between the upper plate (100) and the lower plate (200), and the inclined surfaces of the upper plates face the lower plates, respectively, and the inclined surfaces of the lower plates face respectively The upper plate, and the first slider (310) and the second slider (320) respectively include at least two slider slopes, and the slider slopes respectively abut the upper plate slopes (110) and the lower slopes. One of the plate slopes (210), wherein the upper plate slopes, the lower plate slopes, and the slider slopes are configured to cause the screw to rotate in the long axis direction (X) to drive the first slide The block (310) moves away from the second slider (320), and moves the upper plate (100) away from the lower plate (200) in the vertical direction (Z). For example, the spinal packing block of claim 14, wherein the upper plate inclined surfaces are mirror-symmetrical with respect to a plane perpendicular to one axis (A) of the screw, and the lower plate inclined surfaces are relative to the axis (A) of the screw. The plane is mirror-symmetric. For example, if the spinal stuffing block of item 14 is requested, when the height of the spinal stuffing block is the maximum value, the sliders (310, 320) and the upper and lower plates are configured to make the sliders on the screw ( 400) When moving up, it does not exceed the upper plate (100) and the lower plate (200) in the longitudinal direction. For example, the spinal stuffing block of claim 14, wherein the upper plate includes an upper plate guide member (120), and the upper plate guide member is correspondingly disposed adjacent to one of the upper plate inclined surfaces (110) and parallel At the corresponding upper plate slope (110); the lower plate includes a lower plate guide member (220), which is correspondingly disposed adjacent to one of the lower plate slopes (210) and parallel to The corresponding lower plate inclined surface (210); and the sliders each include at least one slider guide member (313, 323), wherein the slider guide members are respectively disposed adjacent to one of the slider inclined surfaces And cooperate with the upper plate guide member (120) and the lower plate guide member (220) to guide a relative movement between the sliders and the upper plate and the lower plate. If the spine filling block of item 17 is requested, wherein the slider guide members (313,323) are convex rails and the upper plate guide member (120) and the lower plate guide member (220) are grooves, or such The slider guide members (313, 323) are grooves, and the upper plate guide member (120) and the lower plate guide member (220) are raised rails. For example, the spinal packing block of claim 14, wherein the length of the screw is less than or equal to the longitudinal length of the upper plate and the lower plate. For example, the spinal stuffing block of claim 14, wherein the second upper plate surface has an upper plate arc groove (140) at both ends of the upper plate, and the second lower plate surface is on two of the upper plate, respectively. The end has a lower plate arc groove (240), wherein when the screw rotates in the other direction, the first slider (310) approaches the second slider (320), causing the upper plate (100) to approach the lower When the plate (200) reduces the height of the spinal packing block, the upper plate arc grooves and the lower plate arc grooves are used to accommodate the screw (400). For example, the spinal packing block of claim 20, wherein when the height of the spinal packing block is closed to a minimum, the upper plate arc grooves and the lower plate arc grooves respectively form a circular hole surrounding the screw. For example, the spinal stuffing block of claim 14, wherein the spinal stuffing block has a first cross-sectional area at a first end (11) in the direction (X) along the long axis, and in the direction (X) along the long axis A second end (12) on) has a second cross-sectional area, wherein the first cross-sectional area is smaller than the second cross-sectional area. For example, the spinal packing block of claim 14 further includes a first upper plate surface (101) and a first lower plate surface (201), wherein the first upper plate surface (101) is located in the vertical direction (Z). One end, the first lower plate surface (201) is located at the other end in the vertical direction (Z), and an angle is formed between the first upper plate surface (101) and the first lower plate surface (201), The angle between the first upper plate surface (101) and the first lower plate surface (201) to be supported is set.