CN116473732A - A kind of intervertebral fusion device prosthesis - Google Patents

Abstract

The present invention provides an intervertebral fusion prosthesis, comprising: a shell, including three adjustment holes perpendicular to the largest cross-sectional plane of the shell and not on the same straight line, and control holes that are respectively perpendicular to the adjustment holes but whose axes do not intersect with the adjustment holes. The casing is slidably covered, and a slider is also provided, and the slider is slidably arranged in the blind hole. Applying the technical solution of the present invention, when performing intervertebral fusion, the adjustment mechanism in the casing is operated to adjust the height, and the height of the end plate is driven to change, which can match the intervertebral height of patients with different heights.

Description

A kind of intervertebral fusion device prosthesis

technical field

The patent of the present invention relates to the technical field of medical devices, in particular, to an intervertebral fusion device prosthesis.

Background technique

Intervertebral fusion is a mature operation for the treatment of spinal degenerative diseases. It has the advantages of high fusion rate and low complications. During the operation, intervertebral fusion device prosthesis is used to replace the diseased intervertebral disc, so that the spine can restore its original physiological and functional characteristics.

In the existing technology, there are multiple models of intervertebral fusion cages to meet patients with different intervertebral heights. However, in the actual operation process, problems such as inaccurate measurement accuracy, insufficient peeling of the affected area, insufficient bone quality, and insufficient spare models of prostheses are difficult to achieve accurate matching of intervertebral fusion cage prosthesis. At the same time, with the passage of time, secondary subsidence may occur after the intervertebral fusion prosthesis is placed, so that intervertebral fusion needs to be performed again.

In view of the above problems, the present invention proposes an intervertebral fusion prosthesis, which adjusts the height of the intervertebral fusion prosthesis through three sets of adjustment mechanisms that are not on the same straight line, and matches the slight difference of the intervertebral fusion prosthesis to achieve a more accurate intervertebral fusion replacement operation; even if secondary subsidence occurs after the operation, there is no need to replace the intervertebral fusion prosthesis, only the height adjustment is required, which greatly reduces the pain of the patient and the cost of the operation.

Contents of the invention

The present invention provides an intervertebral fusion prosthesis, comprising: a shell, including three adjustment holes perpendicular to the maximum sectional plane of the shell and not on the same straight line, and control holes which are respectively perpendicular to the adjustment holes but whose axes do not intersect with the adjustment holes. The casing is slidably covered, and a slider is also provided, and the slider is slidably arranged in the blind hole.

Further, the adjustment hole is provided with a first hole segment, a second hole segment, a third hole segment, and a fourth hole segment, and the diameter of the first hole segment is smaller than that of the second hole segment and smaller than that of the fourth hole segment.

Further, the control hole is provided with a fifth hole segment and a sixth hole segment, and the diameter of the fifth hole segment is smaller than the diameter of the sixth hole segment.

Further, the worm wheel is provided with an internal thread to cooperate with the adjustment block, and an external gear is provided to cooperate with the worm, and both ends of the external gear are provided with a smooth first bearing part, the first bearing part is rotatably arranged in the second hole section, and the external gear is rotatably arranged in the fourth hole section.

Further, the worm is provided with a first external thread, both ends of the first external thread are provided with a smooth second bearing part, the outermost end of the second bearing part is provided with an operating part, the second bearing part is rotatably arranged in the fifth hole section, and the first external thread is rotatably arranged in the sixth hole section.

Further, the adjustment block includes a ball head and a stud, and the stud is provided with a second external thread to cooperate with the internal thread of the worm wheel, and is movably arranged in the worm wheel and the adjustment hole.

Further, the stud is provided with an anti-rotation gap, the first hole section is provided with an anti-rotation rib, and the anti-rotation rib cooperates with the anti-rotation gap.

Further, the diameter of the slider is smaller than the diameter of the blind hole, and the slider slides closely against the endplate along the section of the blind hole.

Further, the slider is provided with a ball socket to abut the ball head.

Further, the three adjustment holes are arranged in a V shape with an included angle between 90° and 120°.

Applying the technical solution of the present invention, an intervertebral fusion device prosthesis includes: a housing, an adjustment mechanism, and an endplate. During intervertebral fusion, the adjustment mechanism in the housing is operated to adjust the height, and the height of the endplate is driven to change, which can match the intervertebral heights of patients with different heights.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows an exploded view of an intervertebral fusion device prosthesis provided according to an embodiment of the present invention;

Fig. 2 shows a rotating sectional view of an intervertebral fusion device prosthesis provided according to an embodiment of the present invention;

Fig. 3 shows the rotation sectional view of the housing of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 4 shows the top view of the lower half of the housing of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 5 shows the structural representation of the lower half of the housing of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 6 shows the structural representation of the semi-assembly of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 7 shows the structural representation of the endplate of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 8 shows a schematic structural view of the adjustment block of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 9 shows a cross-sectional view of the adjustment block of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 10 shows the structural representation of the worm wheel of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 11 shows the sectional view of the worm wheel of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 12 shows the structural representation of the worm of the intervertebral fusion device prosthesis in Fig. 1;

Fig. 13 shows a cross-sectional view of the worm of the intervertebral cage prosthesis in Fig. 1 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

10. Shell; 11. Adjusting hole; 111. First hole section; 1111. Anti-rotation rib; 112. Second hole section; 113. Third hole section; 114. Fourth hole section; 12. Control hole; 121. Fifth hole section; 122. Sixth hole section;

20. Adjusting mechanism; 21. Worm wheel; 211. Internal thread; 212. External gear; 213. First bearing part; 22. Worm; 221. First external thread; 222. Second bearing part; 223. Operation part; 23. Adjusting block; 231. Ball head;

30, end plate; 31, skirt; 32, blind hole; 321, slider; 3211, ball socket;

α, included angle.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figures 1 to 13, the present invention provides an intervertebral fusion prosthesis, comprising: a housing 10, including three adjustment holes 11 that are perpendicular to the maximum section plane of the housing 10 and not on the same straight line, and control holes 12 that are respectively perpendicular to the adjustment holes 11 but whose axes do not intersect with the adjustment holes 11. The worm gear 21 and the worm 22 are respectively rotatably arranged in the adjustment hole 11 and the control hole 12; the end plate 30 includes a skirt 31 and a blind hole 32, the skirt 31 wraps the outer wall of the casing 10, and slidably covers the casing 10, and is also provided with a slider 321, which is slidably arranged in the blind hole 32.

In this embodiment, for the convenience of illustration, the housing 10 is divided into upper and lower parts along the plane where the axis of the control hole 12 is located.

As shown in FIG. 3 , the adjusting hole 11 is provided with a first hole segment 111 , a second hole segment 112 , a third hole segment 113 , and a fourth hole segment 114 .

As shown in FIG. 5 , the control hole 12 is provided with a fifth hole section 121 and a sixth hole section 122 , and the diameter of the fifth hole section 121 is smaller than the diameter of the sixth hole section 122 .

As shown in Figure 1 to Figure 2, Figure 6, Figure 10 to Figure 11, the worm wheel 21 has an internal thread 211 with the adjustment block 23, and the outer gear 212 is matched with the worm 22. The two ends of the outer gear 212 have a smooth first toherm 213. Dynamic and no offset, the outer gear 212 can be set in the fourth hole segment 114.

As shown in Figure 1 to Figure 2, Figure 6, and Figure 12 to 13, the worm 22 has the first outer thread 221, the first ends of the first outer thread 221 are set with a smooth second inheritance 222, the most outer end of the second to the transfer department 223. Without offset, the first outer thread 221 can be set at the sixth hole section 122.

As shown in Figures 1 to 2, Figure 6, and Figures 8 to 9, the adjustment block 23 includes a ball head 231 and a stud 232, the stud 232 is provided with a second external thread 2321 to cooperate with the internal thread 211 of the worm wheel 21, and is movably arranged in the worm wheel 21 and the adjustment hole 11.

As shown in Figures 4 to 5 and Figures 8 to 9, the stud 232 is provided with an anti-rotation gap 2322, and the first hole section 111 is provided with an anti-rotation rib 1111, and the anti-rotation rib 1111 cooperates with the anti-rotation gap 2322 to limit the adjustment block 23 to move only along its axis when driven by the worm wheel 21.

As shown in FIG. 7 , the diameter of the slider 321 is smaller than that of the blind hole 32 , and the slider 321 slides closely against the endplate 30 along the section of the blind hole 32 .

As shown in FIG. 7 , the slider 321 is provided with a ball socket 3211 abutting against the ball head 231, which increases the contact area between the end plate 30 and the adjustment block 23 and ensures real-time full contact; the edge of the end plate 30 is provided with a skirt 31 wrapping the outer wall of the housing 10, which is slidably covered on the housing 10, and the inside forms a sealed state to ensure that the end plate 30 will not suddenly break away from the housing 10 when the extrusion force is lost.

In particular, the skirt 31 is made of PE or XPE, which can be slightly deformed. When the three sets of adjustment mechanisms 20 are independently adjusted, the end plate 30 and the shell 10 will no longer be parallel, and the skirt 31 will undergo a slight deformation to ensure a good seal.

As shown in FIG. 4 , the three adjustment holes 11 are arranged in a V shape, and the included angle α is between 90° and 120°.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "comprises" are used in this specification, they indicate the presence of features, steps, operations, means, components and/or combinations thereof.

In addition, it should be noted that the use of words such as "first" and "second" to define parts is only for the convenience of distinguishing corresponding parts. If there is no other statement, the above words have no special meaning, so they should not be understood as limiting the protection scope of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. an intervertebral fusion device prosthesis, is characterized in that, comprises: The housing (10) includes three adjustment holes (11) that are perpendicular to the maximum sectional plane of the housing (10) and are not on the same straight line, and control holes (12) that are respectively perpendicular to the adjustment holes (11) but whose axes do not intersect with the adjustment holes (11), and the adjustment holes (11) intersect the edges of the control holes (12); The adjustment mechanism (20) includes three sets of worm gears (21) and worms (22) that intersect perpendicularly to each other and an adjustment block (23) that penetrates inside the worm gears (21). The worm gears (21) and worms (22) are respectively rotatably set in the adjustment hole (11) and the control hole (12); The end plate (30) includes a skirt (31) and a blind hole (32). The skirt (31) wraps the outer wall of the casing (10) and slidably covers the casing (10). A slider (321) is also provided, and the slider (321) is slidably arranged in the blind hole (32). 2. An intervertebral fusion device prosthesis according to claim 1, characterized in that the adjustment hole (11) is provided with a first hole segment (111), a second hole segment (112), a third hole segment (113), and a fourth hole segment (114), and the diameter of the first hole segment (111) is smaller than the diameter of the second hole segment (112) and smaller than the diameter of the fourth hole segment (114). 3. The intervertebral fusion device prosthesis according to claim 1, characterized in that the control hole (12) is provided with a fifth hole segment (121) and a sixth hole segment (122), and the diameter of the fifth hole segment (121) is smaller than the diameter of the sixth hole segment (122). 4. An intervertebral fusion prosthesis according to claim 1, characterized in that the worm wheel (21) is provided with an internal thread (211) to cooperate with the adjustment block (23), an external gear (212) is provided to cooperate with the worm (22), and both ends of the external gear (212) are provided with a smooth first bearing part (213), the first bearing part (213) is rotatably arranged in the second hole segment (112), and the external gear (212) is rotatably arranged in the fourth hole Paragraph (114). 5. An intervertebral fusion prosthesis according to claim 1, characterized in that the worm (22) is provided with a first external thread (221), both ends of the first external thread (221) are provided with a smooth second bearing part (222), the outermost end of the second bearing part (222) is provided with an operating part (223), the second bearing part (222) is rotatably arranged in the fifth hole section (121), and the first external thread (221) is rotatably arranged in the sixth hole section ( 122). 6. An intervertebral fusion prosthesis according to claim 1, characterized in that the adjustment block (23) includes a ball head (231) and a stud (232), and the stud (232) is provided with a second external thread (2321) to match the internal thread (211) of the worm wheel (21), and is movably arranged in the worm wheel (21) and the adjustment hole (11). 7. An intervertebral fusion device prosthesis according to claim 6, characterized in that, the stud (232) is provided with an anti-rotation gap (2322), the first hole section (111) is provided with an anti-rotation rib (1111), and the anti-rotation rib (1111) cooperates with the anti-rotation gap (2322). 8 . The intervertebral fusion prosthesis according to claim 1 , wherein the diameter of the slider ( 321 ) is smaller than that of the blind hole ( 32 ), and the slider ( 321 ) slides close to the endplate ( 30 ) along the section of the blind hole ( 32 ). 9 . The intervertebral fusion device prosthesis according to claim 1 , characterized in that, the slider ( 321 ) is provided with a ball socket ( 3211 ) to abut against the ball head ( 231 ). 10. The intervertebral fusion device prosthesis according to claim 1, characterized in that the three adjustment holes (11) are arranged in a V shape, and the included angle (α) is between 90° and 120°.