CN108451618A - Vertebral lamina stabilizer for vertebra - Google Patents

Abstract

A vertebral plate stabilizer for spine comprises a first supporting unit, a second supporting unit and at least one fixing piece. The first supporting unit comprises a first supporting seat and a first supporting column. The first support seat is provided with a first abutting surface and a first surface opposite to the first abutting surface. The first support column is disposed on the first surface. The second supporting unit is movably sleeved on the first supporting unit, wherein the second supporting unit comprises a second supporting seat and a second supporting column. The second support seat is provided with a second abutting surface and a second surface opposite to the second abutting surface. The second support column is disposed on the second surface. The fixing part is configured to penetrate through and fix the first supporting column and the second supporting column. The vertebral plate stabilizer of the invention can adjust different lengths according to requirements, thereby increasing the stability of the vertebral plate stabilizer installed on the spine.

Description

spine stabilizer

technical field

The invention relates to a vertebral plate stabilizer, especially a stabilizer which can be adjusted and abuts against the vertebral plate.

Background technique

Please refer to FIG. 1 and FIG. 2 . FIG. 1 and FIG. 2 are diagrams illustrating a state of use of a conventional spinal process stabilizer. The spinal process stabilizer 80 is mainly used to be arranged between two adjacent vertebrae 90 to reduce the compression on the spinal nerves. Furthermore, the spine stabilizer 80 can be used to support two adjacent vertebrae 90 to increase the distance between the two adjacent vertebrae 90 , thereby reducing the compression of the nerves by the vertebrae 90 .

As shown in FIGS. 1 and 2 , the spine stabilizer 80 includes a body 81 . The opposite ends of the body 81 have abutment portions 81a. Therefore, when the vertebral process stabilizer 80 is disposed between two adjacent vertebrae 90 , the two abutting portions 81 a of the body 81 respectively abut against the vertebral processes 91 of the two adjacent vertebrae 90 .

Please also refer to FIG. 3 , which is a schematic diagram illustrating the relative position of a conventional spinal process stabilizer and the vertebrae during use. However, when the abutting portion 81 a of the spinal process stabilizer 80 abuts against the spine 91 , the supporting force provided by the abutting portion 81 a is mainly concentrated on the spine 91 . Since the spinous process 91 is a thinner part of the vertebra 90, when the spinous process 91 is stressed for a long time, it is easy to break the spinous process 91 (the broken part 910a is shown in FIG. 3 ).

On the other hand, because the existing spine stabilizer 80 must be installed on the spine 91, but because the sacral vertebra of the human body does not have a spine, the existing spine stabilizer 80 cannot be used in On the last segment of the lumbar vertebra and the first segment of the sacral vertebra.

Contents of the invention

Therefore, an object of the present invention is to provide a spinal lamina stabilizer to improve the problem that the existing spinal process stabilizers tend to cause spinous process breakage.

According to the above purpose of the present invention, a vertebral plate stabilizer is proposed. The vertebral plate stabilizer includes a first supporting unit, a second supporting unit and at least one fixing piece. The first support unit includes a first support seat and a first support column. The first supporting seat has a first abutting surface and the first surface is opposite to the first abutting surface. The first support column is arranged on the first surface. The second support unit is movably sleeved on the first support unit, wherein the second support unit includes a second support seat and a second support column. The second supporting seat has a second abutting surface and the second surface is opposite to the second abutting surface. The second support column is arranged on the second surface. The fixing part is configured to pass through and fix the first supporting column and the second supporting column.

According to an embodiment of the present invention, the above-mentioned first support column has at least one first fixing hole. The second support column has at least one second fixing hole corresponding to the first fixing hole. The fixing parts pass through and are fixed in the first fixing hole and the second fixing hole respectively.

According to another embodiment of the present invention, the above-mentioned first abutting surface has three first concave arcs arranged radially, and the second abutting surface has three second concave arcs arranged radially.

According to another embodiment of the present invention, the above-mentioned spinal plate stabilizer further includes a collar. Wherein, the collar is sheathed on the second supporting column and the first supporting column.

According to yet another embodiment of the present invention, the above-mentioned first support column has at least one first fixing hole. The second support column has at least one second fixing hole respectively corresponding to the first fixing hole. Each of the first fixing hole and the second fixing hole is a through hole. The collar has at least one first screw hole corresponding to the first fixing hole and the second fixing hole. The fixing part has a threaded part, and the fixing part passes through the first screw hole, the second fixing hole and the first fixing hole respectively, and the threaded part of the fixing part is screwed into the first screw hole.

According to yet another embodiment of the present invention, the above-mentioned fixing member further includes a head. The head and the threaded part are respectively arranged on two opposite ends of the fixing part. The collar also has at least one second screw hole, wherein the second screw hole and the first screw hole are located on two opposite sides of the collar, and the head is located in the second screw hole.

According to yet another embodiment of the present invention, the above-mentioned vertebral plate stabilizer further includes a nut. The nut is locked in the second screw hole and abuts against the head of the fixing part.

According to yet another embodiment of the present invention, the surfaces of the above-mentioned first supporting pillar, the second supporting pillar and the collar all include a convex arc surface and a concave arc surface.

According to yet another embodiment of the present invention, the above-mentioned collar is a metal collar, and the material of the first supporting seat and the second supporting seat is different from that of the collar.

According to yet another embodiment of the present invention, the above-mentioned collar has relatively large openings and small openings. Wherein, the collar also has a retaining wing surrounding the small opening, wherein the bottom surface of the second support column abuts against the retaining wing.

From the above, it can be known that the vertebral plate stabilizer of the present invention can adjust the distance between adjacent vertebrae and stably support two adjacent vertebrae by adjusting the relative positions of the first support unit and the second support unit. Furthermore, the first abutting surface and the second abutting surface of the spine lamina stabilizer of the present invention have a concave arc-shaped structural design, and can abut against the triangular area where the lamina of the vertebra is connected to the spinous process, so it can Increase the support area and prevent the spine from breaking due to stress.

In addition, the cross-sections of the sleeve, the first support unit and the second support unit of the present invention are designed with one side convex and one side concave, and the concave side faces the inner side of the spine. Therefore, when the spinal plate stabilizer is installed on the spine, it will not compress the nerves inside the spine.

Description of drawings

For a more complete understanding of the embodiments and advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a diagram illustrating the state of use of an existing spinal process stabilizer;

Fig. 2 is a view showing a state of use of another angle of an existing spinal process stabilizer;

Fig. 3 is a schematic diagram illustrating the relative position of a conventional spinal process stabilizer and the vertebrae during use;

Fig. 4 is a schematic perspective view showing a spinal plate stabilizer according to an embodiment of the present invention;

FIG. 5 is an exploded perspective view illustrating a spinal plate stabilizer according to an embodiment of the present invention;

Fig. 6 is a cross-sectional schematic diagram illustrating a spinal lamina stabilizer according to an embodiment of the present invention;

Fig. 7 is a schematic longitudinal sectional view showing a spinal lamina stabilizer according to an embodiment of the present invention;

Fig. 8 is a schematic longitudinal sectional view illustrating the use of a spinal lamina stabilizer according to an embodiment of the present invention;

Fig. 9 is a view showing the use state of a spinal plate stabilizer according to an embodiment of the present invention;

Fig. 10 is a view showing another angle of use of a spinal plate stabilizer according to an embodiment of the present invention; and

Fig. 11 is a schematic diagram illustrating the relative position of a spinal lamina stabilizer and a vertebra in use according to an embodiment of the present invention; and

Fig. 12 is an exploded perspective view showing a spinal plate stabilizer according to another embodiment of the present invention.

Detailed ways

Please refer to FIG. 4 and FIG. 5 at the same time, wherein FIG. 4 and FIG. 5 are respectively a schematic perspective view and an exploded perspective view of a spinal plate stabilizer according to an embodiment of the present invention. The vertebral plate stabilizer 100 of this embodiment mainly includes a first supporting unit 10 , a collar 20 , a second supporting unit 30 and at least one fixing member 40 .

Please continue to refer to FIG. 4 and FIG. 5 , the first support unit 10 includes a first support seat 11 and a first support column 13 . Wherein, the first support base 11 has an opposite first surface 11 a and a first abutting surface 12 , and the first support column 13 is disposed on the first surface 11 a. In this embodiment, the first abutting surface 12 can mainly abut against the lamina 51 of the vertebra 50 (as shown in FIG. 11 ). In one example, the first abutting surface 12 has three first concave arcs 14 arranged radially, respectively corresponding to the triangular area where the lamina 51 of the vertebra 50 connects with the spine 52 (as shown in FIG. 11 ). . In some examples, the arc design of the first abutting surface 12 can be designed according to the arc of the lamina 51 of different patients. Wherein, the radian of the patient's lamina 51 can be obtained by computerized tomography.

Please refer to FIG. 5 and FIG. 6 at the same time, wherein FIG. 6 is a schematic cross-sectional view of a spinal plate stabilizer according to an embodiment of the present invention. In this embodiment, the first support column 13 is a solid structure. Wherein, the outer surface of the first support column 13 includes opposite convex arc surface 13a and concave arc surface 13b. In addition, the first support column 13 has a plurality of first fixing holes 15 . These first fixing holes 15 penetrate from the convex arc surface 13 a to the concave arc surface 13 b of the first supporting column 13 , and form openings 16 on the convex arc surface 13 a and form openings 17 on the concave arc surface 13 b. In one example, the first fixing holes 15 may be arranged at intervals.

Please refer to FIG. 4 and FIG. 5 again, the second support unit 30 includes a second support base 31 and a second support column 33 . Wherein, the second support base 31 has an opposite second surface 31 a and a second abutting surface 32 , and the second support column 33 is disposed on the second surface 31 a. In this embodiment, the second abutting surface 32 can mainly abut against the lamina 51 of the vertebra 50 (as shown in FIG. 11 ). In one example, the second abutting surface 32 has three second concave arc portions 34 arranged radially, respectively corresponding to the triangular area connecting the lamina 51 and the spine 52 of the vertebra 50 . Similarly, the arc design of the second abutting surface 32 can also be designed according to the arc of the vertebral plate 51 of different patients. Moreover, the arcs of the second abutting surface 32 and the first abutting surface 32 may be different.

Please refer to FIG. 5 and FIG. 6 , in this embodiment, the second support column 33 is a tubular body and can be sleeved on the first support column 13 . In an embodiment, the cross-sectional shape of the second supporting pillar 33 corresponds to the cross-sectional shape of the first supporting pillar 13 . The outer surface of the second support column 33 includes a convex arc surface 33 a and a concave arc surface 33 b opposite to each other. In addition, the second support column 33 has a plurality of second fixing holes 35 and 36 . Wherein, the second fixing hole 35 penetrates through the second supporting column 33 from the convex arc surface 33 a, and the second fixing hole 36 penetrates through the second supporting column 33 from the concave arc surface 33 b. In one example, both the second fixing holes 35 and 36 are through holes.

Please refer to FIG. 5 and FIG. 6 again, the collar 20 is mainly used to be sleeved on the first supporting column 13 and the second supporting column 33 to strengthen and fix the first supporting unit 10 and the second supporting unit 30 . In this embodiment, the cross-sectional shape of the collar 20 corresponds to the shape of the second supporting column 33 . The outer surface of the collar 20 includes opposite convex arc surfaces 20a and concave arc surfaces 20b. In addition, the collar 20 has a plurality of first screw holes 21 and a plurality of second screw holes 22 . Wherein, the first screw hole 21 penetrates through the collar 20 from the convex arc surface 20a, and the second screw hole 22 penetrates into the collar 20 from the concave arc surface 33b.

Please also refer to FIG. 5 and FIG. 7 at the same time, wherein FIG. 7 is a schematic longitudinal cross-sectional view of a spinal plate stabilizer according to an embodiment of the present invention. In one embodiment, as shown in FIG. 5 , the collar 20 has a small opening 23 , a large opening 24 and a flap 25 . The blocking wing 25 is disposed on the inner side of an end edge of the collar 20 and surrounds the small opening 23 . In this embodiment, the first support column 13 is passed through the collar 20 through the small opening 23 , and the second support column 33 is penetrated through the collar 20 through the large opening 24 and sleeved on the first support column 13 superior. In addition, the bottom surface of the second support column 33 is attached to the flap 25 of the collar 20 , so the distance between the second support unit 30 and the first support unit 10 can be adjusted by moving the position of the collar 20 . In this embodiment, the cross-sectional shape of the first supporting column 13 and the second supporting column 33 is the same as that of the collar 20 and is non-circular. Therefore, the first support column 13 , the second support column 33 and the collar 20 can only move radially, but cannot rotate relative to each other.

Please refer to FIG. 5 and FIG. 6 again, the fixing member 40 is configured to pass through and fix the collar 20 , the second supporting unit 30 and the first supporting unit 10 . In this embodiment, the fixing member 40 includes a threaded portion 41 . Thereby, the fixing member 40 can pass through the collar 20 , the second supporting unit 30 and the first supporting unit 10 in sequence, and be screwed onto the collar 20 through the threaded portion 41 . In detail, the fixing member 40 first passes through the first screw hole 21 of the collar 20, the second fixing hole 35 of the second support column 33, the opening 16 of the first support column 13, and the first support column 13. After the opening 17 of the second support column 33 , the second fixing hole 35 and the second screw hole 22 of the collar 20 , the threaded portion 41 of the fixing member 40 is screwed into the second screw hole 22 of the collar 20 . In one embodiment, the fixing member 40 further includes a head 42 , and the head 42 and the threaded portion 41 are respectively located at two opposite ends of the fixing member 40 . Therefore, when the threaded portion 41 of the fixing member 40 is screwed into the second screw hole 22 , the head 42 of the fixing member 40 is located in the first screw hole 21 . In one embodiment, a nut 43 with an external thread can be screwed into the first screw hole 21 against the head 42 of the fixing member 40 to enhance the positioning of the fixing member 40 .

For the sake of clarification, the quantity and the way of threading of the fixing parts 40 can be set according to requirements. In the example of FIG. 3 , the number of fixing pieces 40 is 2, and they are arranged in a cross manner. In addition, in some examples, the collar 20 may be made of metal, and the first supporting unit 10 and the second supporting unit 30 are made of light and elastic materials (such as plastic). Thereby, the fixing member 40 can pass through the first support unit 10 and the second support unit 30 and be locked on the collar 20 .

The method of using the vertebral plate stabilizer 100 of this embodiment will be described below. Please refer to Fig. 7 to Fig. 10 at the same time, in which Fig. 8 is a schematic longitudinal sectional view showing the use of a spinal lamina stabilizer according to an embodiment of the present invention, Fig. 9 and Fig. State diagrams of different angles of a spinal plate stabilizer in use according to an embodiment of the invention. Firstly, the first supporting unit 10 , the second supporting unit 30 and the collar 20 nested in each other can be placed between the lamina 51 of two adjacent vertebrae 50 . Next, move the collar 20 so that the second supporting unit 30 moves relative to the first supporting unit 10 to adjust the distance between the first abutting surface 12 and the second abutting surface 32, thereby properly supporting two adjacent vertebrae 50 of the lamina 51 . After adjusting the distance between the first abutting surface 12 and the second abutting surface 32, the fixing member 40 is passed through and screwed into the collar 20, the second support unit 30 and the first support unit 10, The collar 20 , the second supporting unit 30 and the first supporting unit 10 are fixed.

As shown in FIGS. 8 to 10 , the installed spinal lamina stabilizer 100 is stabilized between two adjacent vertebrae 50 . Moreover, the first abutting surface 12 of the first supporting unit 10 and the second abutting surface 32 of the second supporting unit 30 abut against the lamina 51 of two adjacent vertebrae 50 respectively, so that the first supporting unit 10 can The vertebral plate 51 is stably supported with the second supporting unit 30 . Therefore, it is possible to avoid the problem of breaking the spinous process due to the force concentrated on the spinous process of the vertebra 50 .

For clarification, since the spine lamina stabilizer 100 of this embodiment has the design of the first abutment surface 12 and the second abutment surface 32, the spine lamina stabilizer 100 can be installed on the lumbar spine 60 according to the requirement. Between the lamina and the sacral vertebra 70 . In detail, the vertebral plate stabilizer 100 of the embodiment of the present invention can be installed on the last segment of the lumbar vertebra and the first segment of the sacral vertebra.

Please also refer to FIG. 12 , which is an exploded perspective view of a vertebral plate stabilizer according to another embodiment of the present invention. The structure of the spine lamina stabilizer 200 of this embodiment is substantially the same as the aforementioned spine lamina stabilizer 100 , the only difference is that the spine lamina stabilizer 200 does not have the design of the collar 20 as shown in FIG. 4 . The vertebral plate stabilizer 200 of this embodiment mainly includes a first support unit 210 , a second support unit 230 and a fixing member 250 . In this way, after adjusting the relative distance between the first support unit 210 and the second support unit 230 , the fixing member 250 can also be used to limit the first support unit 210 and the second support unit 230 .

As shown in Figure 12, the structures of the first supporting unit 210, the second supporting unit 230 and the fixing member 250 are respectively the same as the first supporting unit 10, the second supporting unit 30 and the fixing member 40 of the previous embodiment, so here No longer. In some embodiments, the first support unit 210 includes a first support base 211 and a first support column 213 , wherein a plurality of first fixing holes 216 may be disposed on the first support column 213 . Likewise, the second support unit 230 includes a second support seat 231 and a second support column 233 , wherein a plurality of second fixing holes 235 may be disposed on the second support column 233 . In one example, each first fixing hole 216 may be a through hole, and each second fixing hole 235 may be a screw hole. Accordingly, the fixing member 250 can pass through and be fixed in the first support column 213 and the second support column 233 .

In some examples, the first support column 211 and the second support column 233 may be made of metal material, so as to increase the stability of the fixing member 250 locked therein. The first supporting base 211 and the second supporting base 231 can be made of plastic or other lightweight materials, so that the comfort of the spinal plate stabilizer 200 installed on the spine can be increased.

From the above-mentioned embodiments of the present invention, it can be known that the spinal lamina stabilizer of the present invention can adjust the distance between adjacent vertebrae and stably support two adjacent vertebrae by adjusting the relative positions of the first support unit and the second support unit. spine. Furthermore, the first abutting surface and the second abutting surface of the spine lamina stabilizer of the present invention have a concave arc-shaped structural design, and can abut against the triangular area where the lamina of the vertebra is connected to the spinous process, so it can Increase the support area and prevent the spine from breaking due to stress.

In addition, the cross-sections of the sleeve, the first support unit and the second support unit of the present invention are designed with one side convex and one side concave, and the concave side faces the inner side of the spine. Therefore, when the spinal plate stabilizer is installed on the spine, it will not compress the nerves inside the spine.

Although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined by the appended claims.

Claims (10)

1. a kind of Vertebral laminectomy stabilizer, which is characterized in that the Vertebral laminectomy stabilizer includes：

One first support unit, including：One first support base, have one first abutment face and a first surface with respect to this first Abutment face；And one first support column, setting is on the first surface；

One second support unit is movably sheathed on first support unit, and wherein second support unit includes：One second Support base has one second abutment face and a second surface with respect to second abutment face；And one second support column, setting exist On the second surface；And

An at least fixing piece is configured to wear and fix first support column and second support column.

2. Vertebral laminectomy stabilizer according to claim 1, which is characterized in that

First support column has at least one first mounting hole；

There is second support column at least one second mounting hole to correspond to first mounting hole；And

The fixing piece is each passed through and is fixed in first mounting hole and second mounting hole.

3. Vertebral laminectomy stabilizer according to claim 1, which is characterized in that first abutment face has radial arrangement Three the first concave-arc parts, and second abutment face have radial arrangement three the second concave-arc parts.

4. Vertebral laminectomy stabilizer according to claim 1, which is characterized in that the Vertebral laminectomy stabilizer also includes a set of Ring, the wherein lantern ring are sheathed on outside second support column and first support column.

5. Vertebral laminectomy stabilizer according to claim 4, which is characterized in that

First support column has at least one first mounting hole；

Second support column have at least one second mounting hole correspond to first mounting hole, wherein each first mounting hole with should Second mounting hole is a perforation；And

There is the lantern ring at least one first screw hole to correspond to first mounting hole and second mounting hole；

Wherein the fixing piece have a threaded portion, and the fixing piece be each passed through first screw hole, second mounting hole and First mounting hole, and the threaded portion of the fixing piece is screwed together in first screw hole.

6. Vertebral laminectomy stabilizer according to claim 5, which is characterized in that

The fixing piece also includes a head, and the head and the threaded portion are opposite two ends for being separately positioned on the fixing piece；With And

Also there is the lantern ring at least one second screw hole, wherein second screw hole to be located at the opposite of the lantern ring with first screw hole Two sides, and the head is located in second screw hole.

7. Vertebral laminectomy stabilizer according to claim 6, which is characterized in that the Vertebral laminectomy stabilizer also includes at least One nut, the nut lock are set in second screw hole, and against the head of the fixing piece.

8. Vertebral laminectomy stabilizer according to claim 4, which is characterized in that first support column, second support column Surface with the lantern ring includes a convex globoidal and a cancave cambered surface.

9. Vertebral laminectomy stabilizer according to claim 4, which is characterized in that the lantern ring is a metal collar, and this One support base is different from the material of the lantern ring with the material of second support base.

10. Vertebral laminectomy stabilizer according to claim 4, which is characterized in that the lantern ring has an opposite big opening And a small opening, and the lantern ring also has a block wing around the small opening, the bottom surface of wherein second support column is sticked in this Block wing.