A guiding device for placing a spinous process, lamina, and transverse process screw

Abstract

The application relates to a guide for placing a spinous process lamina articular process screw, which comprises a second arc-shaped rod, a first arc-shaped rod, a first positioning rod, an auxiliary rod and a sighting rod, a first connecting block is connected to the first arc-shaped rod, a second connecting block is slidably connected with the second arc-shaped rod, a third connecting block is slidably connected with the second arc-shaped rod, a fourth connecting block is slidably connected with the first arc-shaped rod, the end of the sighting rod towards the inner side of the second arc-shaped rod can intersect with the end of the auxiliary rod towards the inner side of the second arc-shaped rod at point a, the point a is the center of the second arc-shaped rod, the extension line of the central axis of the sighting rod intersects with the end of the first positioning rod towards the inner side of the second arc-shaped rod at point b, and the point b is the center of the first arc-shaped rod. The guide for placing the spinous process lamina articular process screw can accurately determine the piercing direction of the spinous process lamina articular process screw, the guide is not easy to swing during the operation process, the operation precision is high, the guide is easy to use for clinical doctors with insufficient experience, and the guide has extremely high clinical application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of orthopedic medical devices, and particularly relates to a guide for placing a spinous process lamina facet screw. BACKGROUND

[0002] Since the spinous process lamina facet screw was applied in the 1990s, it has been used for treating lower lumbar degenerative diseases, such as one-limb lower extremity symptomatic lumbar intervertebral disc herniation, postoperative recurrence or lumbar spinal stenosis with lumbar instability or degenerative lumbar spondylolisthesis degree I, and the like. Due to the advantages of short internal fixation operation time and low cost, the spinous process lamina facet screw has attracted more and more attention of orthopedic surgeons.

[0003] Translamina facet screw fixation (TLSF) has the advantages of simple operation, safety, few surgical complications, low cost, and fast postoperative recovery, and has become another effective fixation method in addition to pedicle screw fixation in lumbar fusion surgery. The unilateral pedicle screw combined with contralateral translamina facet screw fixation applied in lumbar interbody fusion has been widely used in China.

[0004] If a traditional open surgery is used to place the screw, although the surgical field is wide and easy to operate, the surgical method is mature and not prone to problems, and the spinous process lamina facet screw can be accurately screwed in, the open surgery has large trauma, slow recovery, large damage to the surrounding tissues, and many postoperative complications. Therefore, the open surgery has been gradually replaced by minimally invasive surgery.

[0005] The minimally invasive surgery has a small incision, but the percutaneous fluoroscopy screw placement requires higher technical requirements of the doctor, and it is extremely difficult to accurately screw the screw into the contralateral facet and avoid damaging the dura mater and nerve root. The judgment of the screw position mainly depends on repeated anteroposterior and lateral fluoroscopy during the operation, which is blind to a certain extent, and prone to screw placement failure, prolonged operation time, multiple X-ray fluoroscopy, and large radiation of the doctor and the patient.

[0006] In order to improve the surgical precision and shorten the operation time, the clinician will use a lumbar lamina facet screw aiming device to assist positioning during the operation. Patent No. CN200920120264.5 discloses the related structure of the lumbar lamina facet screw aiming device, but the drilling depth and guide angle of the lumbar lamina facet screw aiming device before use are difficult to determine, and the lumbar lamina facet screw aiming device still has the defect of easy swinging during use. Therefore, the aiming accuracy of the lumbar lamina facet screw aiming device is low, and there is still a large surgical difficulty. SUMMARY

[0007] Therefore, it is necessary to provide a guide for placing a spinous process lamina facet screw to solve the problem of difficult aiming of the spinous process lamina facet screw placement angle.

[0008] To achieve the above objectives, the inventors provide a guide for inserting spinous process lamina articular process screws, comprising: a first arc rod, a second arc rod, a first positioning rod, an auxiliary rod, and an aiming rod. The first arc rod and the second arc rod are both strip-shaped structures, and the first positioning rod, the auxiliary rod, and the aiming rod are all cylindrical rod-shaped structures.

[0009] The second arc rod is arranged side by side with the first arc rod, and the second arc rod is located outside the first arc rod.

[0010] The first positioning rod is provided with a first connecting block, which is connected to the first arc rod. The auxiliary rod is provided with a second connecting block, which is slidably connected to the second arc rod. The aiming rod is provided with a third connecting block and a fourth connecting block, the third connecting block being slidably connected to the second arc rod, and the fourth connecting block being slidably connected to the first arc rod.

[0011] The end of the aiming rod facing the inside of the second arc rod may intersect the end of the auxiliary rod facing the inside of the second arc rod at point a, where point a is the center of the second arc rod. The extension line of the central axis of the aiming rod may intersect the end of the first positioning rod facing the inside of the second arc rod at point b, where point b is the center of the first arc rod.

[0012] Furthermore, the first arc rod is provided with a first arc rod groove along its length direction, the second arc rod is provided with a second arc rod groove along its length direction, the first connecting block and the fourth connecting block move along the first arc rod groove, the second connecting block and the third connecting block move along the second arc rod groove, and the central axes of the first positioning rod, the auxiliary rod and the aiming rod are located in the same plane.

[0013] Alternatively, the first connecting block and the fourth connecting block may be slidably connected to the outside of the first arc rod, and the second connecting block and the third connecting block may be slidably connected to the outside of the second arc rod, with the central axes of the first positioning rod, the auxiliary rod, and the aiming rod located in the same plane.

[0014] Furthermore, the first connecting block is provided with at least one first connecting block groove for sliding on the first arc rod groove, the fourth connecting block is provided with at least one fourth connecting block groove for sliding on the first arc rod groove, the second connecting block is provided with at least one second connecting block groove for sliding on the second arc rod groove, and the third connecting block is provided with at least one third connecting block groove for sliding on the second arc rod groove.

[0015] Furthermore, the first connecting block is sleeved outside the first positioning rod, and the first positioning rod can slide within the first connecting block; the second connecting block is sleeved outside the auxiliary rod, and the auxiliary rod can slide within the second connecting block; the third connecting block and the fourth connecting block are both sleeved outside the aiming rod, and the aiming rod can slide within the third connecting block and the fourth connecting block.

[0016] Furthermore, the first positioning rod, the auxiliary rod, and the aiming rod are all equipped with scales.

[0017] Furthermore, the guide for inserting the spinous process lamina articular process screw also includes a second positioning rod, on which a fifth connecting block is provided, and the fifth connecting block is hinged to the first arc rod or the second arc rod.

[0018] Furthermore, the fifth connecting block is sleeved outside the second positioning rod, and the second positioning rod can slide within the fifth connecting block.

[0019] Furthermore, the second positioning rod is provided with a scale.

[0020] Furthermore, a limiting component is provided at the end of the first positioning rod facing the inner side of the second arc rod, and the distance between point b and the limiting component is 0-10mm.

[0021] Furthermore, a sixth connecting block is also provided on the auxiliary rod, the sixth connecting block is sleeved on the outside of the auxiliary rod, and the auxiliary rod can slide in the sixth connecting block.

[0022] Unlike existing technologies, the above technical solution has the following advantages: The guide for inserting the spinous process-laminar articular process screw positions the first positioning rod on the vertebral body, and the auxiliary rod is used to assist in positioning at a suitable position on the vertebral bone surface. The first positioning rod is fixed to the first arc rod through the first connecting block, and the auxiliary rod is fixed to the second arc rod through the second connecting block. The second arc rod maintains a certain distance from the first arc rod, so that the position between the second arc rod and the first arc rod is relatively determined. The aiming rod intersects with the first positioning rod and the auxiliary rod after passing through the third and fourth connecting blocks. The physician can determine the direction of the spinous process-laminar articular process screw according to the insertion direction of the aiming rod. The spinous process-laminar articular process screw passes through the base of the spinous process, the lamina, the inferior articular process of the upper vertebral body, and the superior articular process of the lower vertebral body before reaching the pedicle of the lower vertebral body. This guide for inserting spinous process lamina articular process screws uses a first positioning rod and an auxiliary rod for positioning, and a targeting rod for further positioning. It can accurately determine the insertion direction of the spinous process lamina articular process screws, and it is not easy to swing during the operation. The operation is highly accurate and easy for inexperienced clinicians to use. It has extremely high clinical application value. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the overall structure of a guide for inserting a spinous process lamina articular process screw according to this embodiment;

[0024] Figure 2 This is another schematic diagram of a guide for inserting a spinous process lamina articular process screw according to this embodiment;

[0025] Figure 3 This is another schematic diagram of a guide for inserting a spinous process lamina articular process screw according to this embodiment;

[0026] Figure 4 This is a schematic diagram of the first connecting block of a guide for inserting a spinous process lamina articular process screw according to this embodiment;

[0027] Figure 5 This is a schematic diagram of the structure of the first positioning rod of a guide for inserting a spinous process lamina articular process screw in this embodiment;

[0028] Figure 6 This is a schematic diagram of the auxiliary rod, aiming rod, or second positioning rod of a guide for inserting a spinous process lamina articular process screw in this embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. First arc bar;

[0031] 11. First arc rod slide groove;

[0032] 2. Second arc bar;

[0033] 21. Second arc rod slide groove;

[0034] 3. First positioning rod;

[0035] 31. First connecting block;

[0036] 311. First connecting block slide groove;

[0037] 32. Limiting components;

[0038] 4. Auxiliary rod;

[0039] 41. Second connecting block;

[0040] 42. Sixth connecting block;

[0041] 5. Aiming rod;

[0042] 51. Third connecting block;

[0043] 52. Fourth connecting block;

[0044] 6. Second positioning rod;

[0045] 61. Fifth connecting block;

[0046] 62. Ball joint;

[0047] 7. Adjustable locking mechanism. Detailed Implementation

[0048] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0049] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0050] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0051] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0052] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0053] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0054] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0055] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] Please see Figures 1 to 3 This embodiment provides a guide for inserting a spinous process lamina articular process screw, comprising: a first arc rod 1, a second arc rod 2, a first positioning rod 3, an auxiliary rod 4, and an aiming rod 5;

[0058] The first arc rod 1 and the second arc rod 2 are arranged side by side, with the second arc rod 2 located outside the first arc rod 1.

[0059] The first positioning rod 3 is provided with a first connecting block 31, which is connected to the first arc rod 1. The auxiliary rod 4 is provided with a second connecting block 41, which is slidably connected to the second arc rod 2. The aiming rod 5 is provided with a third connecting block 51 and a fourth connecting block 52. The third connecting block 51 is slidably connected to the second arc rod 2, and the fourth connecting block 52 is slidably connected to the first arc rod 1. The end of the aiming rod 5 facing the inner side of the second arc rod 2 may intersect with the end of the auxiliary rod 4 facing the inner side of the second arc rod 2 at point a, where point a is the center of the second arc rod 2. The extension line of the central axis of the aiming rod 5 may intersect with the end of the first positioning rod 3 facing the inner side of the second arc rod 2 at point b, where point b is the center of the first arc rod 1.

[0060] The spinous process-laminar articular process screw, also known as the translaminar articular process screw, is a long screw used to provide auxiliary fixation between the articular processes of the lumbar vertebrae in order to enhance the stability of the lumbar spine.

[0061] Both the first arc rod 1 and the second arc rod 2 are strip-shaped structures, preferably made of non-metallic materials, and possess a certain degree of toughness. Preferred materials include polymethyl methacrylate (PMMA), polycarbonate (PC), styrene-acrylonitrile (AS), styrene-methyl methacrylate copolymer (MS), polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), polycarbonate (PC), ABS, polyurethane, polyamide, thermoplastic elastomer, polysulfone, or polyetheretherketone. When X-ray fluoroscopy is used, the non-metallic materials of the first arc rod 1 and second arc rod 2 will not cause metallic artifacts in the image, thus affecting the fluoroscopic results. In some preferred embodiments, the first arc rod 1 and second arc rod 2 are made of transparent materials, which has the advantage of not obstructing surgical light.

[0062] There is a certain gap between the first arc rod 1 and the second arc rod 2.

[0063] The first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 are all cylindrical rod-shaped structures, preferably cylindrical. The lower end of the first positioning rod 3 is a pointed or tapped structure for inserting into the bone to complete the positioning. The lower end of the aiming rod 5 is also a pointed or tapped structure for inserting into the bone to complete the perforation. The lower end of the auxiliary rod 4 is preferably a smooth structure. After the auxiliary rod 4 completes the auxiliary positioning, it is positioned on the bone surface to complete the auxiliary positioning, preventing the auxiliary rod 4 from slipping on the bone surface. In some embodiments, the lower end of the auxiliary rod 4 may also be a pointed or tapped structure.

[0064] The above descriptions of the lower ends of the first positioning rod 3, auxiliary rod 4, and aiming rod 5 all refer to the ends facing the inner side of the second arc rod 2 or the first arc rod 1. In this embodiment, both the first arc rod 1 and the second arc rod 2 are arc-shaped. The inner side of the second arc rod 2 refers to the side facing its center, and the outer side of the second arc rod 2 refers to the side facing away from its center. Similarly, the inner side of the first arc rod 1 refers to the side facing its center, and the outer side of the first arc rod 1 refers to the side facing away from its center.

[0065] The lengths of the first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 are 20-24cm.

[0066] The first connecting block 31 facilitates the adjustment of the first positioning rod 3 to its position on the first arc rod 1; the second connecting block 41 facilitates the adjustment of the auxiliary rod 4 to its position on the second arc rod 2; the third connecting block 51 facilitates the adjustment of the aiming rod 5 to its position on the second arc rod 2; and the fourth connecting block 52 facilitates the adjustment of the aiming rod 5 to its position on the first arc rod 1.

[0067] The end of the aiming rod 5 facing the inside of the second arc rod 2 refers to a portion of the aiming rod 5 facing the inside of the second arc rod 2, near its final end. Specifically, it can be a point or the final end of that portion. The aforementioned final end refers to the endpoint of the aiming rod 5 furthest from the second arc rod 2. Similarly, the ends of the auxiliary rod 4 and the first positioning rod 3 facing the inside of the second arc rod 2 are defined in the same way.

[0068] Adjustable locking elements 7 are provided between the first positioning rod 3 and the aiming rod 5 and the second arc rod 2. Adjustable locking elements 7 are also provided between the auxiliary rod 4 and the aiming rod 5 and the first arc rod 1. The adjustable locking elements 7 can be used to adjust the locking or unlocking states of different components. The adjustable locking elements 7 can be directly and adjustablely mounted on the first connecting block 31, the second connecting block 41, the third connecting block 51, and the fourth connecting block 52. To facilitate the installation of the adjustable locking elements 7, the first arc rod slide groove 11 is designed with a "T-shaped" structure, with one end for mounting the first connecting block 31 and the fourth connecting block 52, and the other end for locking the adjustable locking elements 7. The structure of the second arc rod slide groove 21 is similar to that of the first arc rod slide groove 11.

[0069] The guide for inserting the spinous process lamina articular process screw positions the first positioning rod 3 on the vertebral body. The auxiliary rod 4 is used to assist in positioning at a suitable position on the vertebral bone surface. The first positioning rod 3 is fixed to the first arc rod 1 through the first connecting block 31, and the auxiliary rod 4 is fixed to the second arc rod 2 through the second connecting block 41, so that the first arc rod 1 and the second arc rod 2 maintain a certain distance, making the relative positions of the first arc rod 1 and the second arc rod 2 relatively determined. The aiming rod 5 intersects with the first positioning rod 3 and the auxiliary rod 4 after passing through the third connecting block 51 and the fourth connecting block 52. The physician can determine the direction of the spinous process lamina articular process screw according to the insertion direction of the aiming rod 5. The spinous process lamina articular process screw passes through the base of the spinous process, the lamina, the inferior articular process of the upper vertebral body, the superior articular process of the lower vertebral body, and finally reaches the pedicle of the lower vertebral body. The guide for inserting the spinous process lamina articular process screw uses a first positioning rod 3 and an auxiliary rod 4 for positioning, and a targeting rod 5 for further positioning. It can accurately determine the insertion direction of the spinous process lamina articular process screw, and it is not easy to swing during the operation. The operation is highly accurate and easy for inexperienced clinicians to use. It has extremely high clinical application value.

[0070] When using this guide for inserting the spinous process lamina articular process screw, after positioning the first positioning rod 3 on the vertebral body, use the auxiliary rod 4 to assist in positioning at a suitable position on the vertebral bone surface. Install the first positioning rod 3 on the first arc rod 1 and the auxiliary rod 4 on the second arc rod 2. Since the arc radius of the first arc rod 1 and the second arc rod 2 is a fixed value, the distance between the second arc rod 2 and the first arc rod 1 can be adjusted to a suitable position so that point a is located at the base of the spinous process and point b is located 0-10mm below the pedicle of the lower vertebral body. After installing the aiming rod 5 on the first arc rod 1 and the second arc rod 2, adjust the angle between the aiming rod 5 and the second arc rod 2 and the first arc rod 1 so that the aiming rod 5 intersects with point a, and the extension line of the aiming rod 5 will pass through point b. The physician inserts the spinous process-laminar articular process screw along the direction determined by the aiming rod 5, so that the spinous process-laminar articular process screw passes through the base of the spinous process, the lamina, the inferior articular process of the upper vertebral body, the superior articular process of the lower vertebral body, and finally reaches the pedicle of the lower vertebral body.

[0071] Preferably, point a is located at the end of the auxiliary rod 4 facing the inside of the second arc rod 2, that is, the position where the auxiliary rod 4 contacts the base of the spinous process.

[0072] like Figure 6 As shown, the aiming rod 5 has a central hole extending along its length. After determining the insertion direction of the spinous process, lamina, and articular process screw through the aiming rod 5, the Kirschner wire 8 can be inserted through the central hole of the aiming rod 5, passing through the base of the spinous process, the lamina, the inferior articular process of the upper vertebra, the superior articular process of the lower vertebra, and finally reaching the pedicle of the lower vertebra.

[0073] In some preferred embodiments, the first arc rod 1 is provided with a first arc rod groove 11 along its length direction, the second arc rod 2 is provided with a second arc rod groove 21 along its length direction, the first connecting block 31 and the fourth connecting block 52 move along the first arc rod groove 11, the second connecting block 41 and the third connecting block 51 move along the second arc rod groove 21, and the central axes of the first positioning rod 3, the auxiliary rod 4 and the aiming rod 5 are located in the same plane;

[0074] The first connecting block 31 and the fourth connecting block 52 are slidably connected to the outside of the first arc rod 1, and the second connecting block 41 and the third connecting block 51 are slidably connected to the outside of the second arc rod 2. The central axes of the first positioning rod 3, the auxiliary rod 4 and the aiming rod 5 are located in the same plane.

[0075] By providing the first arc rod groove 11, the fit between the first connecting block 31 and the fourth connecting block 52 and the first arc rod 1 is made more stable. By providing the second arc rod groove 21, the fit between the second connecting block 41 and the third connecting block 51 and the second arc rod 2 is made more stable. The curvature of the second arc rod groove 21 is usually the same as the curvature of the second arc rod 2, and the curvature of the first arc rod groove 11 is usually the same as the curvature of the first arc rod 1. Preferably, the first arc rod groove 11 is located in the middle of the first arc rod 1 and penetrates the inner and outer surfaces of the first arc rod 1; similarly, the second arc rod groove 21 is located in the middle of the second arc rod 2 and penetrates the inner and outer surfaces of the second arc rod 2.

[0076] The purpose of providing the second arc rod groove 21 and the first arc rod groove 11 is to allow adjustment of the positions of the first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 during or after the guide structure is assembled, while maintaining the depth to which the first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 penetrate the inner side of the second arc rod 2 or the first arc rod 1. Providing the second arc rod groove 21 and the first arc rod groove 11 also allows the first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 to be combined with the second arc rod 2 and the first arc rod 1, enhancing the overall structural integrity of the guide for inserting spinous process lamina articular process screws.

[0077] The central axis of the aiming rod 5 will fall into the plane determined by the central axis of the first positioning rod 3 and the central axis of the auxiliary rod 4, so that after the guide for the placement of the spinous process lamina articular process screw is set up, the central axis of the aiming rod 5 will pass through the plane determined by the central axis of the first positioning rod 3 and the central axis of the auxiliary rod 4. That is, the Kirschner wire 8 inserted through the central hole of the aiming rod 5 will intersect with the first positioning rod 3 and the auxiliary rod 4.

[0078] like Figure 4As shown, in some preferred embodiments, the first connecting block 31 is provided with at least one first connecting block groove 311 for sliding on the first arc rod groove 11, the fourth connecting block 52 is provided with at least one fourth connecting block groove 52 for sliding on the first arc rod groove 11, the second connecting block 41 is provided with at least one second connecting block groove 41 for sliding on the second arc rod groove 21, and the third connecting block 51 is provided with at least one third connecting block groove 51 for sliding on the second arc rod groove 21.

[0079] The first connecting block groove 311 is adapted to the first arc-shaped groove 11, so that the first connecting block 31 is disposed within the first arc-shaped groove. The first arc-shaped groove limits the first connecting block 31 and prevents it from detaching from the first arc-shaped groove. The fourth connecting block 52 groove is adapted to the first arc-shaped groove 11, so that the fourth connecting block 52 is disposed within the first arc-shaped groove. The first arc-shaped groove limits the fourth connecting block 52 and prevents it from detaching from the first arc-shaped groove. The second connecting block 41 groove is adapted to the second arc-shaped groove 21, so that the second connecting block 41 is disposed within the second arc-shaped groove. The second arc-shaped groove limits the second connecting block 41 and prevents it from detaching from the second arc-shaped groove. The third connecting block 51 slide groove is adapted to the second arc rod slide groove 21, so that the third connecting block 51 is set in the second arc-shaped slide groove. The second arc-shaped slide groove plays a limiting role for the third connecting block 51, preventing the third connecting block 51 from detaching from the second arc-shaped slide groove.

[0080] Specifically, the first connecting block 31, the second connecting block 41, the third connecting block 51, and the fourth connecting block 52 are all "I-shaped" structures. Regarding the first connecting block 31, two opposing first connecting block grooves 311 are formed on both sides of its web. The first connecting block grooves 311 pass through a first arc-shaped groove, and their end plates are confined to the inner and outer surfaces of the first arc rod 1, making the fit between the first connecting block 31 and the first arc rod 1 more compact. To facilitate the installation of the first connecting block 31, the end of the first arc-shaped groove is provided with a structure for opening and closing the groove, making it easy to install the first connecting block 31 into the first arc-shaped groove. Similarly, the structures of the second connecting block 41, the third connecting block 51, and the fourth connecting block 52 are similar to those of the first connecting block 31, and will not be described in detail here.

[0081] In some preferred embodiments, the first connecting block 31 is sleeved outside the first positioning rod 3, and the first positioning rod 3 can slide in the first connecting block 31; the second connecting block 41 is sleeved outside the auxiliary rod 4, and the auxiliary rod 4 can slide in the second connecting block 41; the third connecting block 51 and the fourth connecting block 52 are both sleeved outside the aiming rod 5, and the aiming rod 5 can slide in the third connecting block 51 and the fourth connecting block 52.

[0082] The central axis of the first positioning rod 3 or its extension passes through the center of the first arc rod 1, i.e., point b. The central axis of the auxiliary rod 4 or its extension passes through the center of the second arc rod 2, i.e., point a. The central axis of the aiming rod 5 or its extension passes through the centers of both the first arc rod 1 and the second arc rod 2, i.e., it passes through both points a and b. The ability of the first positioning rod 3 to slide within the first connecting block 31 facilitates adjustment of the relative position between the first positioning rod 3 and the first arc rod 1. Similarly, the ability of the auxiliary rod 4 to slide within the second connecting block 41 facilitates adjustment of the relative position between the auxiliary rod 4 and the second arc rod 2. Likewise, the ability of the aiming rod 5 to slide within the third connecting block 51 and the fourth connecting block 52 facilitates adjustment of the relative position between the aiming rod 5 and both the first and second arc rods 1 and 2.

[0083] In some more preferred embodiments, the first positioning rod 3, the auxiliary rod 4, and the aiming rod 5 are all provided with scales. By reading the scales, the relative positions between the first positioning rod 3 and the first arc rod 1, the relative positions between the auxiliary rod 4 and the second arc rod 2, and the relative positions between the aiming rod 5 and the first arc rod 1 and the second arc rod 2 can be determined more intuitively.

[0084] In some preferred embodiments, the guide for inserting the spinous process laminae articular process screw further includes a second positioning rod 6, on which a fifth connecting block 61 is provided. The fifth connecting block 61 is hinged to the first arc rod 1 or the second arc rod 2. The hinge between the fifth connecting block 61 and the first arc rod 1 or the second arc rod 2 can be achieved through a ball joint 62. The second positioning rod 6 has a similar structure to the first positioning rod 3, and will not be described in detail here. The end point of the second positioning rod 6 facing the inside of the first arc rod 1 is the pedicle of the superior vertebral body. Through the second positioning rod 6, the structure formed by the first positioning rod 3, the auxiliary rod 4, the second arc rod 2, and the first arc rod 1 can be made more stable.

[0085] In some preferred embodiments, the fifth connecting block 61 is sleeved around the second positioning rod 6, and the second positioning rod 6 can slide within the fifth connecting block 61. This allows for convenient adjustment of the relative position between the second positioning rod 6 and the first arc rod 1 or the second arc rod 2.

[0086] In some more preferred embodiments, the second positioning rod 6 is provided with a scale. The relative position between the first arc rod 1 or the second arc rod 2 can be determined more intuitively by reading the scale.

[0087] like Figure 5As shown, in some preferred embodiments, a limiting member 32 is provided at the end of the first positioning rod 3 facing the inner side of the second arc rod 2, and the distance between point b and the limiting member 32 is 0-10mm. The limiting member 32 refers to a spherical structure, sheet-like structure, block-like structure, columnar structure, or other irregular shape with its edge protruding from the side of the first positioning rod 3. Preferably, when the first positioning rod 3 is a cylindrical rod-like structure, the limiting member 32 refers to a spherical structure with a diameter larger than the first positioning rod 3, which is used to limit the depth of the first positioning rod 3 inserted into the bone. This makes the aiming rod 5 more accurate in reaching the pedicle of the lower vertebra after passing through the base of the spinous process, the lamina, the inferior articular process of the upper vertebra, and the superior articular process of the lower vertebra.

[0088] In some preferred embodiments, a sixth connecting block 42 is further provided on the auxiliary rod 4. The sixth connecting block 42 is sleeved on the auxiliary rod 4, and the auxiliary rod 4 can slide within the sixth connecting block 42. The sixth connecting block 42 enables connections between the auxiliary rod 4 and both the first arc rod 1 and the second arc rod 2, making the guide structure more stable. The structure of the sixth connecting block 42 is described above with reference to the description of the first connecting block 31, and will not be repeated here.

[0089] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A guide for inserting a spinous process lamina articular process screw, characterized in that, include: The first arc rod, the second arc rod, the first positioning rod, the auxiliary rod, and the aiming rod are all rod-shaped structures, and the first arc rod, the auxiliary rod, and the aiming rod are all columnar rod-shaped structures. The second arc rod is arranged side by side with the first arc rod, and the second arc rod is located outside the first arc rod. The first positioning rod is provided with a first connecting block, which is connected to the first arc rod. The auxiliary rod is provided with a second connecting block, which is slidably connected to the second arc rod. The aiming rod is provided with a third connecting block and a fourth connecting block, the third connecting block being slidably connected to the second arc rod, and the fourth connecting block being slidably connected to the first arc rod. The end of the aiming rod facing the inside of the second arc rod may intersect the end of the auxiliary rod facing the inside of the second arc rod at point a, where point a is the center of the second arc rod. The extension line of the central axis of the aiming rod may intersect the end of the first positioning rod facing the inside of the second arc rod at point b, where point b is the center of the first arc rod.

2. The guide for inserting articular screws into the spinous process lamina according to claim 1, characterized in that: The first arc rod is provided with a first arc rod groove along its length direction, the second arc rod is provided with a second arc rod groove along its length direction, the first connecting block and the fourth connecting block move along the first arc rod groove, the second connecting block and the third connecting block move along the second arc rod groove, and the central axes of the first positioning rod, the auxiliary rod and the aiming rod are located in the same plane. Alternatively, the first connecting block and the fourth connecting block may be slidably connected to the outside of the first arc rod, and the second connecting block and the third connecting block may be slidably connected to the outside of the second arc rod, with the central axes of the first positioning rod, the auxiliary rod, and the aiming rod located in the same plane.

3. The guide for inserting a spinous process lamina articular process screw according to claim 2, characterized in that: The first connecting block is provided with at least one first connecting block groove for sliding on the first arc rod groove; the fourth connecting block is provided with at least one fourth connecting block groove for sliding on the first arc rod groove; the second connecting block is provided with at least one second connecting block groove for sliding on the second arc rod groove; and the third connecting block is provided with at least one third connecting block groove for sliding on the second arc rod groove.

4. The guide for inserting a spinous process lamina articular process screw according to claim 1, characterized in that: The first connecting block is sleeved outside the first positioning rod, and the first positioning rod can slide within the first connecting block; the second connecting block is sleeved outside the auxiliary rod, and the auxiliary rod can slide within the second connecting block; the third connecting block and the fourth connecting block are both sleeved outside the aiming rod, and the aiming rod can slide within the third connecting block and the fourth connecting block.

5. The guide for inserting a spinous process lamina articular process screw according to claim 4, characterized in that: The first positioning rod, the auxiliary rod, and the aiming rod are all equipped with scales.

6. The guide for inserting a spinous process lamina articular process screw according to claim 1, characterized in that: The guide for inserting the spinous process lamina articular process screw also includes a second positioning rod, on which a fifth connecting block is provided. The fifth connecting block is hinged to the first arc rod or the second arc rod.

7. The guide for inserting a spinous process lamina articular process screw according to claim 6, characterized in that: The fifth connecting block is sleeved outside the second positioning rod, and the second positioning rod can slide within the fifth connecting block.

8. The guide for inserting a spinous process lamina articular process screw according to claim 7, characterized in that: The second positioning rod is equipped with a scale.

9. The guide for inserting a spinous process lamina articular process screw according to claim 1, characterized in that: A limiting element is provided at the end of the first positioning rod facing the inner side of the second arc rod, and the distance between point b and the limiting element is 0-10mm.

10. The guide for inserting a spinous process lamina articular process screw according to claim 1, characterized in that: The auxiliary rod is also provided with a sixth connecting block, which is sleeved on the outside of the auxiliary rod, and the auxiliary rod can slide in the sixth connecting block.

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