Angled locking nail plate fixing and strengthening system based on lumbar vertebra oblique outer side approach

Abstract

The invention provides a lumbar vertebra oblique lateral approach-based angled locking nail plate fixation strengthening system, and relates to the technical field of medical instruments, the lumbar vertebra oblique lateral approach-based angled locking nail plate fixation strengthening system comprises a locking fusion cage, a lateral approach locking plate, an upper locking screw, a lower locking screw and a bone cement injection device, the locking fusion cage is used for being placed in a lumbar vertebra gap; a connecting part for connecting and locking the fusion cage is arranged on the lateral locking plate, and a first mounting hole inclined upwards and a second mounting hole inclined downwards are formed in the lateral locking plate; the upper locking bolt and the lower locking bolt respectively penetrate through the first mounting hole and the second mounting hole and are connected into the lumbar vertebra body; the upper locking screw and the lower locking screw are respectively provided with a circulation channel; on one hand, a single-side approach and a single body position are adopted, the problem of postoperative lumbar major muscle irritation can be effectively avoided, on the other hand, the locking fusion cage is firm in positioning and not prone to loosening and sinking, stable internal fixation can be achieved, the fusion rate can be increased, and meanwhile bone cement injection, lumbar vertebra body strengthening and vertebral body end plate reconstruction can be directly conducted.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a lumbar oblique lateral approach with an angle-locked nail plate fixation reinforcement system. Background Art

[0002] Spinal fusion was proposed by Hibbs and Albee in 1911. After more than 100 years of development, it has become one of the most commonly used surgical techniques in spinal surgery. There are various fusion techniques used to treat lumbar diseases, such as anterior lumbar interbody fusion [ALIF], posterior lumbar interbody fusion [PLIF], transforaminal lumbar interbody fusion [TLIF], and extreme lateral interbody fusion [XLIF], to meet the requirements of adaptability, safety, and effectiveness. In the past 20 years, minimally invasive spinal technology has continued to develop and become popular. While ensuring clinical efficacy, it can reduce trauma, intraoperative bleeding, bed rest time, and complications. Among them, oblique lateral approach interbody fusion [OLIF] is the most common.

[0003] There are three ways to add internal fixation after Cage placement in oblique lateral approach interbody fusion. The first is no internal fixation, the second is lateral screwing, and the third is posterior pedicle screw internal fixation. If posterior pedicle screw internal fixation is used, the position needs to be changed for secondary disinfection, which prolongs the operation time. For single-segment patients, the traditional screw-rod system is mostly used, and lateral screwing is currently the best choice.

[0004] The existing lateral approach screw-rod system is usually fixed from the side of the vertebral body, and the screw entry point is to enter from the right side of the vertebral body, drive into the vertebral body, and pass out from the left side of the vertebral body; or enter from the left side of the vertebral body, drive into the vertebral body, and pass out from the right side of the vertebral body. This fixation method usually has the problem of protruding the tail cap and the screw rod, thereby causing irritation of the psoas major muscle. Secondly, the lateral approach screw-rod system is not very stable, and its fusion device is easily displaced, which affects the surgical efficacy. Therefore, sometimes it is necessary to add a posterior pedicle screw fixation system, that is, insert the screw from the apex of the miter spine and drive it into the vertebral body along the direction of the pedicle. Since the surgical position of the lumbar oblique lateral approach is the lateral position, the posterior pedicle screw fixation system usually requires a prone position, which requires changing the position for secondary disinfection, prolonging the operation time and increasing the iatrogenic trauma, which is extremely inconvenient.

[0005] Existing screw channel reinforcement and vertebral body reinforcement are usually performed through one or two stages of posterior pedicle screw bone cement reinforcement treatment based on lateral fusion, or after screwing out the screws, bone cement is poured into the upper and lower vertebral screw channels under direct vision, and then the screws are screwed in. The former has the same disadvantages as the above-mentioned posterior surgery. The latter requires repeated screwing out, which causes damage to the screw channel. Summary of the invention

[0006] The purpose of the present invention is to provide a lumbar oblique lateral approach with an angled locking nail plate fixation reinforcement system to solve the above-mentioned technical problems existing in the prior art; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects; see the following description for details.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a lumbar oblique lateral approach angled locking nail plate fixation reinforcement system, comprising a locking fusion device, a lateral locking plate, an upper locking screw, a lower locking screw and a bone cement injection device, wherein: the locking fusion device is used to be placed in the lumbar intervertebral space; the lateral locking plate is provided with a connecting portion for connecting the locking fusion device, and the lateral locking plate is provided with a first mounting hole and a second mounting hole on the upper and lower sides of the connecting portion, respectively, the axis of the first mounting hole is inclined upward, and the axis of the second mounting hole is inclined downward; the upper locking screw can pass through the first mounting hole along the axial direction of the first mounting hole and be connected to the lumbar vertebral body; the lower locking screw can pass through the second mounting hole along the axial direction of the second mounting hole and be connected to the lumbar vertebral body; the upper locking screw and the lower locking screw are both provided with a circulation channel along the axial direction; the bone cement injection device can be connected to the circulation channel to inject bone cement into the lumbar vertebral body.

[0009] Preferably, the connecting portion is configured as a first connecting hole, a second connecting hole is provided on the locking fusion device, and the lumbar oblique lateral approach-based angled locking nail plate fixation reinforcement system also includes a connecting screw, the connecting end of the connecting screw passes through the first connecting hole and is connected to the second connecting hole.

[0010] Preferably, the lateral locking plate is provided with a concave arc surface adapted to the lateral edge of the lumbar vertebral body, and the lateral locking plate can fit against the lateral edge of the lumbar vertebral body through the concave arc surface.

[0011] Preferably, the first mounting hole and the second mounting hole are both configured as threaded holes; the heads of the upper locking screw and the lower locking screw are both provided with external threads that threadably match the threaded holes.

[0012] Preferably, the upper locking screw and the lower locking screw are both configured as multi-threaded screws, and the multi-threaded screw comprises a plurality of thread segments arranged in sequence; the pitches of all the thread segments gradually increase from the head to the tail.

[0013] Preferably, a plurality of through holes are sequentially arranged on the outer walls of the upper locking screw and the lower locking screw along the axial direction, and the through holes are connected to the circulation channel; a first reference portion is arranged at the position of the head of the upper locking screw and the head of the lower locking screw corresponding to the through hole, and a second reference portion is arranged on the side locking plate at the outer position of the first mounting hole and the outer position of the second mounting hole, and the first reference portion corresponds to the second reference portion.

[0014] Preferably, the bone cement injection device comprises an extension tube, a guide and a bone cement injection channel which are sequentially arranged from the outside to the inside.

[0015] Preferably, a positioning and mounting groove is provided at the center position of the end surface of the upper locking screw head and the center position of the end surface of the lower locking screw head, and a positioning block matched with the positioning and mounting groove is provided at the tail end of the guide; a first plug-in portion is provided on the outer side of the positioning and mounting groove, and a first plug-in portion is provided at the tail end of the extension tube to be plugged and matched with the first plug-in portion; the outlet end of the bone cement injection channel is matched with the circulation channel, and the outlet end of the bone cement injection channel can pass through the tail end of the guide and be inserted into the circulation channel.

[0016] Preferably, the head of the guide is provided with a second plug-in portion, and the head of the extension tube is provided with a second plug-in portion, and the second plug-in portion is plug-connected with the second plug-in portion; a slot is provided on the outer wall of the head of the guide, and a claw is connected to the outer wall of the inlet end of the bone cement injection channel, and the claw is plugged into the slot.

[0017] Preferably, the lumbar oblique lateral approach-based angled locking nail plate fixation reinforcement system further comprises a measuring instrument for measuring the position of the nail entry point; the measuring instrument is a vernier caliper.

[0018] The invention provides a lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system which has at least the following beneficial effects:

[0019] The lumbar oblique lateral approach-based angled locking top plate fixation reinforcement system comprises a locking fusion device, a lateral locking plate, an upper locking screw, a lower locking screw and a bone cement pusher. The locking fusion device is used to be placed in the lumbar intervertebral space. The lateral locking plate, the upper locking screw and the lower locking screw cooperate with each other. A unilateral approach is adopted, which can effectively avoid psoas muscle irritation caused by the protruding tail cap and the nail rod of the existing nail-rod system. The bone cement pusher is used for injecting bone cement, and can directly perform reinforcement operations, strengthen the lumbar vertebral body, and reconstruct the vertebral end plate.

[0020] The lateral locking plate is provided with a connecting portion for connecting and locking the fusion device, and the lateral locking plate is respectively provided with a first mounting hole and a second mounting hole on the upper and lower sides of the connecting portion, the axis of the first mounting hole is inclined upward, and the axis of the second mounting hole is inclined downward, the upper locking screw and the lower locking screw are respectively connected to the lumbar vertebral body along the first mounting hole and the second mounting hole, the lateral locking plate, the locking fusion device, the upper locking bolt and the lower locking bolt are firmly connected, the fusion device is not easy to sink, and stable internal fixation can be achieved.

[0021] The present invention cooperates with each other through the locking fusion device, the lateral locking plate, the upper locking screw, the lower locking screw and the bone cement injection device. On the one hand, a unilateral approach and a single body position are adopted, which can effectively avoid the problem of postoperative psoas major muscle irritation. On the other hand, the locking fusion device is firmly positioned and not easy to loosen or sink, which can achieve stable internal fixation and improve the fusion rate. At the same time, bone cement can be directly injected to strengthen the lumbar vertebral body and reconstruct the vertebral end plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the use state of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the present invention;

[0025] Figure 3 It is a schematic diagram of a state in which the lateral locking plate of the present invention is fixed to the lateral edge of the lumbar vertebral body;

[0026] Figure 4 It is a schematic diagram of a state in which the locking fusion device, the lateral locking plate, the upper locking screw and the lower locking screw of the present invention are fixed to a lumbar vertebral body;

[0027] Figure 5 It is a schematic diagram of the structure of the locking fusion device of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the side road locking plate of the present invention;

[0029] Figure 7 is a side view schematic diagram of a side road locking plate of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the multi-threaded segment screw of the present invention;

[0031] Fig. 9 is a schematic front view of a multi-threaded segment screw of the present invention;

[0032] Fig.10 is a schematic cross-sectional view of a multi-threaded segment screw of the present invention;

[0033] Fig.11 It is a schematic diagram of the structure of the present invention;

[0034] Fig.12 It is a structural schematic diagram of the bone cement push injection device of the present invention;

[0035] Fig.13 It is a structural schematic diagram of the extension tube of the present invention;

[0036] Fig.14 It is a structural schematic diagram of the guide of the present invention;

[0037] Fig.15 It is a structural schematic diagram of the bone cement injection channel of the present invention;

[0038] Fig.16 is a cross-sectional schematic diagram of a bone cement push injection device of the present invention;

[0039] Fig.17 It is a schematic diagram of the connection structure between the bone cement injection device of the present invention and the multi-threaded segment screw.

[0040] Reference numerals

[0041] 1. Locking fusion device; 11. Second connecting hole; 2. Side locking plate; 21. First connecting hole; 22. First mounting hole; 23. Second mounting hole; 24. Concave arc surface; 25. First reference part; 3. Upper locking screw; 31. Flow channel; 32. Threaded section; 33. Through hole; 34. Positioning mounting groove; 35. First plug-in part; 36. Second reference part; 4. Lower locking screw; 5. Bone cement injection device; 51. Extension tube; 511. First plug-in part; 512. Second plug-in part; 52. Guide; 521. Positioning block; 522. Second plug-in part; 523. Slot; 53. Bone cement injection channel; 531. Clamping claw; 6. Measuring instrument; 7. Lumbar vertebral body. DETAILED DESCRIPTION

[0042] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] The present invention provides a lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system, referring to Figures 1 to 17 As shown, the lumbar oblique lateral approach-based angled locking top plate fixation reinforcement system includes a locking fusion device 1, a lateral locking plate 2, an upper locking screw 3, a lower locking screw 4 and a bone cement injection device 5.

[0045] The locking fusion device 1 is used to be inserted into the lumbar intervertebral space; the lateral locking plate 2 is a steel plate on which a connecting portion is arranged, and the connecting portion is used to connect the locking fusion device 1. The lateral locking plate 2 is fixed to the lateral edge of the lumbar vertebral body 7, and adopts a unilateral approach and a single body position, which solves the problem of psoas muscle irritation caused by the protruding tail cap of the screw and the nail rod in the existing nail rod system.

[0046] Specifically, Figure 4 As shown, the lateral locking plate 2 is installed at the position of 1 / 2 of the lateral X-ray cone, which is consistent with the exposure position of the oblique lateral approach to the lumbar spine. If the lateral locking plate 2 is close to the posterior 1 / 2 of the superior cone 71 and the inferior cone 72, more abdominal organs and vascular tissues need to be exposed, and the traction injury is also greater, which increases the degree of postoperative pain and related surgical complications.

[0047] A first mounting hole 22 and a second mounting hole 23 are respectively arranged on the upper and lower sides of the connecting portion of the lateral locking plate 2. The axis of the first mounting hole 22 is inclined upward, and the axis of the second mounting hole 23 is inclined downward. The inclination angles of the first mounting hole 22 and the second mounting hole 23 relative to the horizontal line are both set to 10°; the upper locking screw 3 can pass through the first mounting hole 22 along the axial direction of the first mounting hole 22 and be connected to the lumbar vertebral body 7, and the lower locking screw 4 can pass through the second mounting hole 23 along the axial direction of the second mounting hole 23 and be connected to the lumbar vertebral body 7; in this way, the upper locking screw 3 and the lower locking screw are fixed in the lumbar vertebral body 7 at an inclination angle of 10°, which can firmly fix and lock the fusion device 1 and the lateral locking plate 2 to prevent them from loosening and sinking, and can achieve stable internal fixation and improve the fusion rate.

[0048] Both the upper locking screw 3 and the lower locking screw 4 are provided with a circulation channel 31 along the axial direction, and the bone cement pushing device 5 can be connected to the circulation channel 31. When pushing bone cement, the bone cement is transported to the circulation channel 31 through the bone cement pushing device 5, and then injected into the lumbar vertebral body 7; the lumbar vertebral body can be strengthened and the reconstruction of the vertebral end plate can be achieved.

[0049] Embodiment 2:

[0050] Example 2 is based on Example 1:

[0051] like Figures 1 to 17As shown, the connecting portion is provided with a first connecting hole 21, and the side wall of the locking fusion device 1 is provided with a second connecting hole 11, and the first connecting hole 21 and the second connecting hole 11 are both threaded holes. The angled locking nail plate fixation reinforcement system based on the lumbar oblique lateral approach also includes a connecting screw, and the connecting end of the connecting screw passes through the first connecting hole 21 and is connected to the second connecting hole 11.

[0052] The locking fusion device 1 and the lateral locking plate 2 are connected by connecting screws, and the connection operation is convenient and the connection state is firm.

[0053] Preferably, the first connecting hole 21 has a diameter of 3 mm and is a countersunk hole. The head of the connecting screw is provided with an external thread that matches the first connecting hole 21 . The stud of the connecting screw has a diameter of 2.5 mm and a length of 10 mm.

[0054] As an optional embodiment, the lateral locking plate 2 is provided with a concave arc surface 24 adapted to the side edge of the lumbar vertebral body 7. The lateral locking plate 2 can fit the side edge of the lumbar vertebral body 7 through the concave arc surface 24, and the four corners of the lateral locking plate 2 are all rounded.

[0055] Preferably, the width of the side road locking plate 2 is set to 10 mm, the thickness is 5 mm, and the length is customized according to actual measurement results.

[0056] As an optional embodiment, the first mounting hole 22 and the second mounting hole 23 are both configured as threaded holes; the heads of the upper locking screw 3 and the lower locking screw 4 are both provided with external threads that cooperate with the threads of the threaded holes. In this way, the mounting hole is a countersunk hole, and when the locking screw is installed, its head is located on the inner side of the mounting hole.

[0057] With the threaded structure, the side locking plate and the locking screw are connected easily and securely.

[0058] Preferably, the diameter of the head of the upper locking screw 3 and the lower locking screw 4 is 6.5 mm, the diameter of the stud is 6 mm, and the pitch of the external thread of the head is 0.5 mm.

[0059] As an optional embodiment, the upper locking screw 3 and the lower locking screw 4 are both configured as multi-threaded screws, and the multi-threaded screws include a plurality of thread segments 32 arranged in sequence; the pitch of all thread segments 32 increases gradually from the head to the tail; in this way, the holding force of the locking screw can be increased, the locking effect can be optimized, and the screw backing can be prevented.

[0060] Preferably, the multi-thread screw is a double-thread screw, and the stud has two thread sections, the thread section near the tail end has a pitch of 3 mm, and the thread section near the head end has a pitch of 1 mm.

[0061] As an optional embodiment, a plurality of through holes 33 are sequentially arranged along the axial direction on the outer walls of the upper locking screw 3 and the lower locking screw 4. The through holes 33 are vertically connected to the circulation channel 31. The through holes 33 are the outlets of the circulation channel 31. The bone cement flowing through the circulation channel 31 is finally injected into the lumbar vertebral body 7 through the through holes 33.

[0062] Preferably, the inner diameter of the circulation channel is 1.75 mm, the number of the through holes 33 is set to three, and the three through holes 33 are arranged in sequence at equal intervals.

[0063] A first reference portion 25 is provided at the position of the head of the upper locking screw 3 and the head of the lower locking screw 4 corresponding to the through hole 33, and a second reference portion 36 is provided at the peripheral position of the first mounting hole 22 and the peripheral position of the second mounting hole 23 on the side locking plate 2, and the first reference portion 25 corresponds to the second reference portion 36.

[0064] The first reference portion 25 and the second reference portion 36 cooperate with each other to accurately position the direction of the through hole 33 so that the through hole of the upper locking screw 3 faces the lower end plate, and the through hole of the lower locking screw 4 faces the upper end plate.

[0065] Preferably, the first reference portion 25 and the second reference portion 36 are both configured as reference grooves.

[0066] As an optional embodiment, the bone cement injection device 5 includes an extension tube 51, a guide 52 and a bone cement injection channel 53 arranged in sequence from the outside to the inside. The extension tube 51, the guide 52 and the bone cement injection channel 53 cooperate with each other and can be used for the OLIF minimally invasive channel.

[0067] As an optional implementation, a positioning installation groove 34 is provided at the center position of the head end surface of the upper locking screw 3 and the center position of the head end surface of the lower locking screw 4. The positioning installation groove 34 is an inner hexagonal groove, and a positioning block 521 adapted to the positioning installation groove 34 is provided at the tail end of the guide 52.

[0068] The positioning installation groove 34 can be used for disassembly and assembly of the locking screw through a threaded tool on the one hand, and is a positioning groove that cooperates with the positioning block 521 to achieve a positioning connection between the guide 52 and the locking screw on the other hand.

[0069] A first plug-in portion 35 is provided on the outer side of the positioning and mounting groove 34, and a first plug-in portion 511 which is plugged and matched with the first plug-in portion 35 is provided at the tail end of the extension tube 51. The first plug-in portion 35 and the first plug-in portion 511 adopt a plug-in structure of a plug-in groove and a plug-in block, which can realize the plug-in of the tail end of the extension tube 51 with the locking screw.

[0070] The outlet end of the bone cement push channel 53 is adapted to the circulation channel 31 , and the outlet end of the bone cement push channel 53 can pass through the tail end of the guide 52 and be inserted into the circulation channel 31 , so that the connection effect is significant and the bone cement circulates smoothly.

[0071] The head of the bone cement injection channel 53 is an inlet end, and bone cement can be injected by connecting a bone cement syringe.

[0072] As an optional embodiment, the head of the guide 52 is provided with a second plug-in portion 522, and the head of the extension tube 51 is provided with a second plug-in portion 512. The second plug-in portion 522 is plug-connected to the second plug-in portion 512. The second plug-in portion 522 and the second plug-in portion 512 adopt a plug-in structure of a plug-in block and a plug-in groove, which can realize the plug-in connection between the head of the guide 52 and the head of the extension tube 51.

[0073] A card slot 523 is provided on the outer wall of the head of the guide 52, and the card slot 523 is an annular card slot. A claw 531 is connected to the outer wall of the inlet end of the bone cement injection channel 53. The number of the claws 531 is set to two, and the two claws 531 are arranged opposite to each other and are snapped into the card slot 523; the snap-connecting structure is adopted, the state is stable when connected, and the operation is convenient during disassembly and assembly.

[0074] As an optional embodiment, the lumbar oblique lateral approach-based angle-locked screw plate fixation reinforcement system further includes a measuring instrument 6 for measuring the position of the screw entry point.

[0075] The measuring instrument 6 is a vernier caliper, which includes a fixed rod that can be inserted into the second connecting hole 11 of the locking fusion device 1, and also includes a linear movable rod that moves to the center of the nail entry point. By measuring its length, the length of the lateral locking plate 2 can be determined.

[0076] The process of performing surgery using the present invention is as follows:

[0077] The position of the nail entry point is determined by the measuring instrument 6, so that the nail entry point is symmetrical, and the length of the lateral locking plate 2 is determined at the same time. After the locking fusion device 1 is placed in the intervertebral space of the lumbar vertebral body 7, the locking fusion device 1 and the lateral locking plate 2 are connected by the connecting screws to lock their positions. The lateral locking plate 2 is installed to the position of 1 / 2 of the vertebral body in the lateral X-ray, which conforms to the exposed position of the lumbar oblique external approach. The first mounting hole 22 of the lateral locking plate 2 is located at the lower 1 / 3 position of the front edge of the upper vertebral body 71, and the second mounting hole 23 is located at the front edge of the lower vertebral body 72. The upper 1 / 3 position of the edge is then used to fix the lateral locking plate 2 with an inclination of 10° through the upper locking screw 3 and the lower locking screw 4. The locking screw penetrates the contralateral cortex, and the through hole 33 near the tail end does not penetrate the cortex. During the screw placement operation, the first reference portion 25 is aligned with the second reference portion 36 to ensure that the through hole of the upper locking screw 3 faces the lower end plate, and the through hole of the lower locking screw 4 faces the upper end plate. Then, the bone cement injection device 5 is connected to the locking screw, and bone cement is injected into the lumbar vertebral body 7 through the bone cement syringe.

[0078] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0080] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0081] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system, characterized in that: It includes a locking fusion device, a lateral locking plate, an upper locking screw, a lower locking screw and a bone cement injection device, wherein: The locking fusion device is used to be placed in the lumbar intervertebral space; The lateral locking plate is provided with a connection portion for connecting and locking the fusion device, and the lateral locking plate is provided with a first mounting hole and a second mounting hole at the upper side and the lower side of the connection portion, respectively, the axis of the first mounting hole is arranged to be inclined upward, and the axis of the second mounting hole is arranged to be inclined downward; The upper locking screw can pass through the first mounting hole along the axial direction of the first mounting hole and be connected to the lumbar vertebral body; the lower locking screw can pass through the second mounting hole along the axial direction of the second mounting hole and be connected to the lumbar vertebral body; the upper locking screw and the lower locking screw are both provided with a flow channel along the axial direction; The bone cement pushing device can be communicated with the circulation channel to inject bone cement into the lumbar vertebral body.

2. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The connecting portion is configured as a first connecting hole, a second connecting hole is configured on the locking fusion device, and the lumbar oblique lateral approach-based angled locking nail plate fixation reinforcement system also includes a connecting screw, the connecting end of the connecting screw passes through the first connecting hole and is connected to the second connecting hole.

3. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The lateral locking plate is provided with a concave arc surface adapted to the lateral edge of the lumbar vertebral body, and the lateral locking plate can fit the lateral edge of the lumbar vertebral body through the concave arc surface.

4. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The first mounting hole and the second mounting hole are both configured as threaded holes; The heads of the upper locking screw and the lower locking screw are both provided with external threads that are threadably matched with the threaded holes.

5. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The upper locking screw and the lower locking screw are both configured as multi-threaded screws, and the multi-threaded screws include a plurality of thread segments arranged in sequence; The pitches of all the thread segments gradually increase from the head to the tail.

6. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 5, characterized in that: A plurality of through holes are sequentially arranged on the outer walls of the upper locking screw and the lower locking screw along the axial direction, and the through holes are connected to the circulation channel; The heads of the upper locking screw and the heads of the lower locking screw are both provided with first reference portions at positions corresponding to the through holes, and the side locking plate is both provided with second reference portions at peripheral positions of the first mounting hole and the second mounting hole, and the first reference portion corresponds to the second reference portion.

7. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The bone cement injection device comprises an extension tube, a guide and a bone cement injection channel which are sequentially arranged from the outside to the inside.

8. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 7, characterized in that: A positioning installation groove is provided at the center position of the end surface of the upper locking screw head and the center position of the end surface of the lower locking screw head, and a positioning block adapted to the positioning installation groove is provided at the tail end of the guide; A first plug-in portion is disposed on the outer side of the positioning and mounting groove, and a first plug-in portion plug-matched with the first plug-in portion is disposed at the tail end of the extension tube; The outlet end of the bone cement push channel is adapted to the circulation channel, and the outlet end of the bone cement push channel can pass through the tail end of the guide and be inserted into the circulation channel.

9. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 7, characterized in that: The head of the guide is provided with a second plug-in portion, the head of the extension tube is provided with a second plug-in portion, and the second plug-in portion is plug-connected with the second plug-in portion; A clamping groove is provided on the outer wall of the head of the guide, and a clamping claw is connected to the outer wall of the inlet end of the bone cement injection channel, and the clamping claw is clamped into the clamping groove.

10. The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system according to claim 1, characterized in that: The lumbar oblique lateral approach with angled locking nail plate fixation reinforcement system also includes a measuring instrument for measuring the position of the nail entry point; The measuring instrument is a vernier caliper.

Images