Titanium mesh assembly

Abstract

The titanium mesh assembly comprises a titanium mesh support, an end cover assembly and a locking mechanism. A positioning ring is arranged on the inner side of at least one port of the titanium mesh support and is of an outer gear ring structure. The end cover assembly comprises an end cover plate, a positioning block and a shaft wheel. The positioning block and the shaft wheel are arranged on the face, facing the titanium mesh support, of the end cover plate. Positioning teeth are evenly arranged on the positioning block in the length direction of the positioning block and meshed with the positioning ring. The shaft wheel is rotatably connected with the titanium mesh bracket; the locking mechanism comprises a locking piece, and the locking piece can extend into the titanium mesh support and is used for abutting against the positioning block and / or the shaft wheel in a limiting mode after the angle of the end cover plate is adjusted in place. The discrete angle of the end cover plate can be accurately and quantitatively adjusted through tooth meshing, and preoperative positioning and postoperative review are facilitated; by adopting a double-side mechanical self-locking structure of the locking piece, the bottom of the positioning block and the hole of the shaft wheel, the angle stability after implantation is ensured, and the angle accuracy, stability and reliability of the end cover are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a titanium mesh assembly. BACKGROUND

[0002] Titanium mesh interbody fusion cage is a core implant for reconstructing vertebral stability, restoring intervertebral height and sagittal and coronal force line. The existing technology mainly has two types of fixed angle end face fusion cage and self-adaptive end cap fusion cage: the former realizes initial stability through preset plane or single wedge angle and different models and specifications, but can only provide limited standardized angle options, and the operator needs to rely on repeated trial fitting to approximate the target; the latter relies on hinges, ball sockets or compliant structures to produce continuous end cap angle changes under stress or during surgery.

[0003] The existing scheme has the disadvantages of discrete and uncontrollable end cap angle matching of the titanium mesh assembly, limited model selection for trial fitting of the fixed angle product, unquantifiable and non-reproducible adjustment of the continuous self-adaptive end cap structure, insufficient stability, poor adaptability, complex structure, large space occupation of the implanted channel, low adjustment precision and heavy use burden in actual application. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems of unquantifiable and uncontrollable end cap angle adjustment, insufficient stability, poor adaptability and low adjustment precision of the cervical titanium mesh assembly in the prior art.

[0005] The present application provides a titanium mesh assembly, which comprises a titanium mesh support, an end cap assembly and a locking mechanism.

[0006] At least one inner side of the port of the titanium mesh support is provided with a positioning ring, and the positioning ring is an outer gear ring structure.

[0007] The end cap assembly comprises an end cap plate, a positioning block and a shaft wheel, one side of the end cap plate is provided with the positioning block and the shaft wheel; the positioning block is uniformly provided with positioning teeth along the length direction thereof, and the positioning teeth are engaged with the positioning ring; and the shaft wheel is rotatably connected with the titanium mesh support.

[0008] The locking mechanism comprises a locking piece, the locking piece can extend into the titanium mesh support, and is used for limiting abutment with the positioning block and / or the shaft wheel after the end cap plate is adjusted to the right angle.

[0009] Further, one side of the positioning ring is provided with a knob, and the knob is in transmission connection with the positioning ring.

[0010] Further, the end cap plate, the positioning block and the shaft wheel are integrally formed.

[0011] Further, the locking member is a locking screw, and the side wall of the titanium mesh support is provided with a first locking hole; after the end cover plate is adjusted to the right angle, the locking screw is abutted with the bottom of the positioning block through the first locking hole.

[0012] Further, the side wall of the titanium mesh support is provided with a plurality of first locking holes in parallel along the axial direction.

[0013] Further, the shaft wheel is provided with a plurality of openings along the circumferential direction thereof.

[0014] Further, the locking member is a locking screw, and the side wall of the titanium mesh support is provided with a second locking hole; after the end cover plate is adjusted to the right angle, the locking screw is abutted with the opening through the second locking hole.

[0015] Further, when the positioning teeth are engaged with the positioning ring, the end cover plate can be adjusted at discrete angles.

[0016] Further, the outer surface of the end cover plate is provided with anti-skid teeth.

[0017] Further, the side wall of the titanium mesh support is provided with a through porous bone guide grid, and the porous bone guide grid is communicated with the inner cavity of the titanium mesh support.

[0018] The implementation of the embodiment of the present application has the following beneficial effects:

[0019] The titanium mesh assembly of the present application is engaged with the positioning teeth of the positioning block through the outer gear ring structure of the positioning ring, so that the discrete angle adjustment of the indexing gear is realized, the operator can quickly position to the target angle according to the preoperative planning, and the angle value is reviewed through the imaging examination after the operation, so that the repeated interference of blind trial fitting on the end plate or the unquantifiable defects of the continuous self-adaptive structure are avoided.

[0020] The double-sided mechanical self-locking structure of the locking screw and the bottom of the positioning block and the opening of the shaft wheel is adopted, so that the angle of the end cover plate after implantation does not change with the stress of the outer surface of the end cover plate, the stability of the sagittal or coronal force line is long-term maintained, and the risks of attitude drift, alignment loss and coupling with adjacent segments are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0022] Figure 1 is the sectional view of the titanium mesh assembly of the embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of an end cover assembly of an embodiment of the present application;

[0024] Figure 3 is a sectional view of part of the structure of a titanium mesh assembly of an embodiment of the present application in an angle adjustment state;

[0025] Figure 4 is a sectional view of part of the structure of a titanium mesh assembly of an embodiment of the present application;

[0026] Figure 5 is a structural schematic diagram of a port part of a titanium mesh support of an embodiment of the present application;

[0027] Figure 6 is a structural schematic diagram of an end cover assembly of an embodiment of the present application.

[0028] In the figure, the reference signs correspond to: 1, titanium mesh support; 11, first locking hole; 12, second locking hole; 13, porous bone guide mesh; 2, end cover assembly; 21, end cover plate; 211, anti-skid tooth; 22, positioning block; 221, positioning tooth; 23, shaft wheel; 231, opening; 31, locking piece; 4, positioning ring; 5, knob. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be understood that the terms "upper, lower, inner, outer, top, bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or are directed to the components themselves in the vertical, perpendicular or gravitational direction, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features.

[0031] Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used herein, the term "about" when used in connection with a numerical value, means that the value is within 10% of the recited value. As used herein, the term "consisting essentially of" means that the composition or process includes the recited elements, and includes additional elements that do not materially affect the basic and novel characteristics of the composition or process. As used herein, the term "consisting of" means an exclusive inclusion, that is, the composition or process includes only the recited elements.

[0032] The following description is provided in connection with Figures 1-6 A titanium mesh assembly is provided in the embodiments of the present application, Figure 1 is a sectional view of the titanium mesh assembly in the embodiments of the present application; Figure 2 is a structural schematic view of an end cap assembly in the embodiments of the present application; Figure 3 is a sectional view of part of the structure of the titanium mesh assembly in the embodiments of the present application in an angle adjustment state; Figure 4 is a sectional view of part of the structure of the titanium mesh assembly in the embodiments of the present application; Figure 5 is a structural schematic view of a titanium mesh support port in the embodiments of the present application; Figure 6 is a structural schematic view of the titanium mesh assembly in the embodiments of the present application.

[0033] A titanium mesh assembly is provided in the embodiments of the present application, which comprises a titanium mesh support 1, an end cap assembly 2 and a locking mechanism.

[0034] The titanium mesh support 1 is a main support structure of the titanium mesh assembly and is in a cylindrical structure. The main body part of the titanium mesh support 1 can be made of conventional titanium or titanium alloy material, and the inner cavity thereof is used for accommodating bone graft material such as autologous bone or allogeneic bone. The side wall of the titanium mesh support 1 is provided with a through porous bone guide grid 13, which is in communication with the inner cavity. The grid aperture can be adjusted according to the need of bone ingrowth, and the surrounding bone tissue is promoted to grow and vascularize through the porous bone guide grid 13, so as to accelerate the bone fusion process between the vertebral bodies. The shape of the porous bone guide grid 13 can be designed as a regular array, such as a square grid, a rhombic grid or a honeycomb structure with random distribution.

[0035] A positioning ring 4 is provided on the inner side of at least one port of the titanium mesh support 1. The positioning ring 4 has an external toothed ring structure. The positioning ring 4 can be fixed inside the port of the titanium mesh support 1 by means of a rotating shaft and a support seat on the titanium mesh support 1. In this embodiment, positioning rings 4 are provided on the inner sides of both the upper and lower ports of the titanium mesh support 1 to achieve independent angle adjustment of the upper and lower end covers.

[0036] Positioning ring 4 can be fixed inside the port via a rotating shaft and a support seat set on the titanium mesh bracket 1, such as Figure 5 As shown on the left. The support base can be a protruding boss on the inner side of the port of the titanium mesh bracket 1 or an independently set columnar support structure. The rotating shaft passes through the center of the positioning ring 4 and is connected to the support base, so that the positioning ring 4 can rotate around it.

[0037] The end cap assembly 2 includes an end cap plate 21, a positioning block 22, and a shaft wheel 23. The end cap plate 21 has the positioning block 22 and the shaft wheel 23 on the side facing the titanium mesh support 1. The positioning block 22 has positioning teeth 221 evenly distributed along its length direction, that is, in a direction parallel to the axis of the titanium mesh support 1. The positioning teeth 221 mesh with the positioning ring 4, and the positioning block 22 is driven to reciprocate through the tooth meshing transmission, thereby driving the end cap plate 21 to rotate around the shaft wheel 23, so as to realize the discrete indexing adjustment of the angle.

[0038] In this embodiment, when the positioning tooth 221 engages with the positioning ring 4, the end cover plate 21 can be adjusted at discrete angles. Each adjustment increment rotates the end cover plate by 2° or 3°. In some possible implementations, the graduation settings are not limited to 2° or 3°, and can be adjusted to other uniform intervals within the range of 1°-5°, such as 1.5° or 4°, depending on clinical needs. The surgeon can quickly position the device to the target angle, such as 2°, 3°, or 5°, according to preoperative planning, and the angle values ​​can be verified postoperatively through imaging examinations.

[0039] The end cover plate 21 is rotatably connected to the titanium mesh support 1 via a shaft wheel 23. In this embodiment, the shaft wheel 23 is connected to the titanium mesh support 1 via a support shaft passing through it, and both ends of the support shaft are fixedly connected to the titanium mesh support 1, so that the shaft wheel 23 can rotate freely around the support shaft.

[0040] In one possible implementation, such as Figure 2 As shown, the end cover plate 21, positioning block 22, and shaft wheel 23 are integrally formed. The end cover plate 21, positioning block 22, and shaft wheel 23 can be integrally formed by injection molding, casting, or machining to ensure the connection strength of the three and avoid angle adjustment failure due to assembly errors in the separate structure.

[0041] In another possible implementation, the positioning block 22 and the end cover plate 21 can be connected separately, such as by screws or clips, but the meshing accuracy between the positioning teeth 221 and the positioning ring 4 must be ensured.

[0042] Anti-slip teeth 211 are provided on the outer surface of the end cover plate 21.

[0043] Specifically, the outer surface of the end cap plate 21 is a bone contact surface, which can be designed as a contoured arc surface, and the end cap plate 21 is provided with anti-skid teeth 211. The contoured arc surface is adapted to the anatomical morphology of the vertebral endplate, such as a slightly convex arc shape, and the anti-skid teeth 211 are micro-toothed protrusions for enhancing the friction and mechanical interlocking between the end cap plate and the endplate, further improving the initial stability.

[0044] The locking mechanism includes a locking piece 31 which can extend into the titanium mesh support 1 for limiting abutment with the positioning block 22 and / or the shaft wheel 23 after the angle adjustment of the end cap plate 21 is in place. The locking mechanism is used to achieve self-locking fixation of the angle after the angle adjustment of the end cap plate 21 is in place, preventing angle drift due to stress after implantation of the titanium mesh assembly.

[0045] As shown in the embodiments of the present application, Figure 3 and 4 the locking piece 31 includes a first locking piece and a second locking piece, which ensures that the angle of the end cap plate 21 does not change on its own under long-term load through double locking.

[0046] The first locking piece is a locking screw, and the side wall of the titanium mesh support 1 is provided with a first locking hole 11. After the angle adjustment of the end cap plate 21 is in place, the first locking piece abuts against the bottom of the positioning block 22 through the first locking hole 11, limiting the movement of the positioning block 22, and thereby fixing the angle of the end cap plate 21. The first locking hole 11 can be provided in multiple along the axial direction of the side wall of the titanium mesh support 1, and the corresponding first locking hole 11 can be selected for locking according to the target angle. Alternatively, the first locking hole 11 is provided in 3-5 along the axial direction of the side wall of the titanium mesh support 1, and the spacing between the first locking holes 11 is adapted to the angle adjustment position of the end cap plate 21.

[0047] The second locking piece is a locking screw, and the side wall of the titanium mesh support 1 is provided with a second locking hole 12. The shaft wheel 23 is provided with a plurality of openings 231 in the circumferential direction. After the angle adjustment of the end cap plate 21 is in place, the second locking piece is fitted and clamped with the openings 231 through the second locking hole 12, limiting the circumferential rotation of the shaft wheel 23, and at the same time forming a double-sided mechanical self-locking with the first locking piece.

[0048] The number of circumferential openings 231 of the shaft wheel 23 can be adjusted according to the locking requirement, and the opening shape can be circular, elliptical or waist-shaped hole to adapt to the shape and insertion mode of the insertion end of different locking pieces 31.

[0049] In some possible embodiments, the locking piece 31 can adopt a elastic buckle or a jack. For example, a plastic or metal elastic piece is buckled into the opening of the positioning block 22 or the shaft wheel 23.

[0050] In some possible embodiments, the locking mechanism can adopt a single-sided locking mode for limiting, such as only through the first locking piece abutting against the bottom of the positioning block 22, and it is necessary to ensure that the engagement accuracy of the positioning block 22 and the positioning ring 4 is high enough to reduce the risk of slight loosening in long-term use.

[0051] Further, one side of the positioning ring 4 is provided with a knob 5 in transmission connection with the positioning ring 4. By rotating the knob 5, the positioning ring is driven to rotate, and then the end cover plate 21 is angle-adjusted. Since the positioning teeth 221 of the positioning block 22 are engaged with the tooth groove of the positioning ring 4, the rotation of the positioning ring 4 drives the positioning block 22 to reciprocate up and down in the direction parallel to the axis of the titanium mesh support 1, and then drives the end cover plate 21 to rotate relative to the titanium mesh support 1, so as to realize the discrete indexing adjustment of the angle.

[0052] In the embodiments of the application, the end cover assembly 2 includes an upper end cover assembly and a lower end cover assembly, and the upper end cover assembly and the lower end cover assembly are not linked to each other and do not affect each other in angle adjustment, that is, the angle adjustment of the upper end cover plate will not affect the lower end cover plate, and vice versa. In actual situations, the upper and lower vertebral endplates often present asymmetry, such as the upper endplate with gentle curvature and the lower endplate with degenerative depression, or one side of the endplate with hyperplasia of bone spurs and the other side with bone loss. The traditional overall linkage scheme will cause one end to improve the fit and the other end to deteriorate the fit, and then cause eccentric force and subsidence risks. The application can respectively optimize the angles of the upper and lower end cover plates through independent indexing adjustment, so that the two end cover plates and the corresponding endplates achieve the best fit, and the eccentric load and subsidence risks are reduced.

[0053] The titanium mesh assembly of the application is engaged with the positioning teeth 221 of the positioning block 22 through the outer gear ring structure of the positioning ring 4, so as to realize the discrete angle adjustment with 2° / 3° indexing interval. The operator can quickly position to the target angle according to the preoperative planning, and review the angle value through imaging examination after operation, so as to avoid the repeated interference of blind trial fitting on the endplate or the defect that the continuous adaptive structure is not quantifiable.

[0054] The discrete indexing adjustment and the bilateral mechanical self-locking are adopted, so as to realize the quantitative control of the angle, the angle after implantation does not change with the force, and the uncontrollability of continuous adjustment and the drift risk in long-term use are avoided.

[0055] The bilateral mechanical self-locking structure of the locking screw and the bottom of the positioning block 22 and the opening 231 of the shaft wheel 23 is adopted, so that the angle of the end cover plate 21 does not change with the force of the end cover plate after implantation, the stability of the sagittal or coronal force line is maintained for a long time, and the risks of posture drift, alignment loss and coupling with adjacent segments are reduced.

[0056] The upper and lower port end cover assemblies 2 of the titanium mesh stent 1 are not linked to each other, the angle adjustment does not affect each other, the indexing positions can be independently set according to the different curvatures and degeneration degrees of the upper and lower end plates, the defect that one end is improved while the other end is deteriorated in the traditional overall linkage scheme is avoided, and the stress eccentricity and subsidence risk is reduced.

[0057] The titanium mesh stent 1, the positioning block 22 and the shaft wheel 23 of the end cover assembly 2, the double-sided mechanical self-locking of the locking mechanism, and the independent indexing adjustment of the upper and lower end covers realize the core functions of angle quantization, self-locking anti-drifting, independent adaptation of the upper and lower ends, and simple and reliable structure. At the same time, the porous bone guiding grid 13 promotes bone fusion, the anti-slip teeth 211 enhance the initial stability, and the configuration design of the general body and the indexing piece reduces the inventory and the surgical process burden, and comprehensively solves the pain points of uncontrollable angle matching, post-stress posture drifting, and difficulty in independent matching of the upper and lower ends in the prior art, and provides a more accurate and reliable solution for interbody fusion surgery.

[0058] The above-described embodiments are only some of the embodiments of the present specification, rather than all. Based on the embodiments in the present specification, those skilled in the art can make other different forms of changes or modifications without creative labor, and all should belong to the protection scope of the present specification.

Claims

1. A titanium mesh assembly, characterized by, Titanium mesh stent (1), end cover assembly (2) and locking mechanism are included; At least one port of the titanium mesh stent (1) is provided with a positioning ring (4), and the positioning ring (4) is an outer gear ring structure. The end cover assembly (2) comprises an end cover plate (21), a positioning block (22) and an axle wheel (23), one side of the end cover plate (21) is provided with the positioning block (22) and the axle wheel (23); the positioning block (22) is uniformly provided with positioning teeth (221) along the length direction, and the positioning teeth (221) are engaged with the positioning ring (4); the axle wheel (23) is rotatably connected with the titanium mesh stent (1). The locking mechanism comprises a locking piece (31), which can extend into the titanium mesh stent (1) and be limited to abut with the positioning block (22) and / or the axle wheel (23) after the end cover plate (21) is adjusted to the right angle.

2. The titanium mesh assembly of claim 1, wherein, One side of the positioning ring (4) is provided with a knob (5), and the knob (5) is in transmission connection with the positioning ring (4).

3. The titanium mesh assembly of claim 1, wherein, The end cover plate (21), the positioning block (22) and the axle wheel (23) are integrally formed.

4. The titanium mesh assembly of claim 1, wherein, The locking piece (31) is a locking screw, and a first locking hole (11) is arranged on the side wall of the titanium mesh stent (1); after the end cover plate (21) is adjusted to the right angle, the locking screw is in abutment with the bottom of the positioning block (22) through the first locking hole (11).

5. The titanium mesh assembly of claim 4, wherein, A plurality of first locking holes (11) are arranged on the side wall of the titanium mesh stent (1) in parallel along the axial direction.

6. The titanium mesh assembly of claim 1, wherein, A plurality of openings (231) are arranged on the axle wheel (23) along the circumferential direction.

7. The titanium mesh assembly of claim 6, wherein, The locking piece (31) is a locking screw, and a second locking hole (12) is arranged on the side wall of the titanium mesh stent (1); after the end cover plate (21) is adjusted to the right angle, the locking screw is matched and clamped with the opening (231) through the second locking hole (12).

8. The titanium mesh assembly of claim 1, wherein, When the positioning teeth (221) are engaged with the positioning ring (4), the end cover plate (21) can be adjusted at discrete angles.

9. The titanium mesh assembly of claim 1, wherein, Anti-skid teeth (211) are arranged on the outer surface of the end cover plate (21).

10. The titanium mesh assembly of claim 1, wherein, The side wall of the titanium mesh stent (1) is provided with a through porous bone guiding mesh (13), and the porous bone guiding mesh (13) is in communication with the inner cavity of the titanium mesh stent (1).

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