Individualized in-vitro positioning guide plate for sacroiliac joint screw

Abstract

The utility model relates to the technical field of medical tools, and discloses a sacroiliac joint screw individualized in-vitro positioning guide plate which comprises a plate body, a fixing hole used for guiding and connecting with a screw is formed in the plate body, and a bending groove facilitating bending adjustment of the plate body is formed in the plate body. The positioning guide plate effectively solves the problems that when a screw penetrates through the positioning guide plate to be connected with the sacroiliac joint of a patient, the screw tilts and deviates, positioning and guiding are not accurate enough, when a doctor bends the positioning guide plate, the positioning guide plate needs to be bent with large force, and the doctor cannot bend the positioning guide plate conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of medical tools, in particular to an individualized external positioning guide plate for sacroiliac joint screws. Background Art

[0002] The sacroiliac joint is located below the waist and on both sides of the sacrococcyx, that is, a little above the buttocks. The sacroiliac joint is an important joint structure in the human body. Currently, when a patient has a fracture in the sacroiliac joint, screws need to be inserted into the patient's sacroiliac joint for fixation. Before inserting the screws, doctors need to use a positioning guide plate first. Through the positioning guide plate, the screws can be inserted more accurately into the patient's sacroiliac joint, which can effectively reduce the operation time and improve the safety and efficiency of the operation. However, the existing guide plate is not convenient for doctors to position and guide the screws. When connecting the screws through the positioning guide plate to the patient's sacroiliac joint, the screws will deflect and shift, and the positioning and guiding are not accurate enough. Moreover, when doctors bend the positioning guide plate, they need to use a large amount of force, which is not convenient for doctors to bend the positioning guide plate. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the problems mentioned in the above background art, that is, when connecting the screws through the positioning guide plate to the patient's sacroiliac joint, the screws will deflect and shift, the positioning and guiding are not accurate enough, and when doctors bend the positioning guide plate, they need to use a large amount of force, which is not convenient for doctors to bend the positioning guide plate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] An individualized external positioning guide plate for sacroiliac joint screws, comprising a plate body. The plate body is provided with fixing holes for guiding and connecting with the screws, and the plate body is provided with bending grooves for facilitating the bending and adjustment of the plate body.

[0006] Preferably, the plate body is provided with a plurality of fixing ends, and the fixing holes are opened on the fixing ends. The fixing ends are set according to the number of screws to be inserted. The screws pass through the fixing holes on the fixing ends to fix the plate body on the patient's sacroiliac joint.

[0007] Preferably, a locking surface is provided at the edge of one end of the fixing hole where the screw enters. Through the locking surface, the screw can be guided to a certain extent when inserted, ensuring that the screw can be accurately inserted into the fixing hole.

[0008] Preferably, the locking surface is inclined and is arranged in a circular ring. The locking surface can be in close contact with the inner side of the screw head, increasing the friction between the two, thereby improving the fixing stability of the screw in the plate body.

[0009] Preferably, the fixing hole is provided with connecting threads that can be threadedly engaged with the screw. Before inserting the screw into the patient's sacroiliac joint, the end of the screw is first preliminarily connected to the connecting threads, which can prevent the screw from shifting when it is subsequently inserted into the sacroiliac joint.

[0010] Preferably, the plate body is provided with a bending groove, which makes the thickness of the bent part of the plate body thinner, thus making it more convenient for doctors to bend the plate body.

[0011] Preferably, several extension ends are provided on the bending groove. Each extension end is respectively located between two adjacent fixed ends. The groove of the extension end is provided between the two fixed ends, so that when the two fixed ends are bent, they can be deformed and bent better.

[0012] Preferably, arc surfaces are provided at the edges of the bending groove. The arc surfaces at the bending groove can make the stress of the plate body more evenly distributed when it is bent, reduce the possibility of stress concentration, and make the plate body transition more smoothly during the bending process.

[0013] Preferably, the outer edge of the plate body is an arc chamfer, which can better disperse the force when bearing pressure, reduce the local pressure, and thus reduce the risk of damage to the surrounding tissues.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] The present utility model is provided with fixing holes for inserting screws. The locking surfaces on the fixing holes can provide certain guidance when the screws are inserted, ensure that the screws can be accurately inserted into the fixing holes, and can also improve the fixing stability of the screws in the plate body. The provided connecting threads enable the end of the screw to be preliminarily connected to the connecting threads before the screw is inserted into the patient's sacroiliac joint, which can prevent the screw from shifting when it is subsequently inserted into the sacroiliac joint;

[0016] The provided bending groove makes the thickness of the bent part of the plate body thinner, thus making it more convenient for doctors to bend the plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2The following is a schematic view of the lower part of the present utility model;

[0020] Figure 3 This is the Figure 1 enlarged view of part A in the present utility model.

[0021] Explanation of figure numbers: 1. Plate body; 11. Fixed end; 2. Fixed hole; 21. Locking surface; 22. Connecting thread; 3. Bending groove; 31. Extension end; 4. Arc surface. Specific embodiments

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be used in other implementation schemes, variation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present utility model.

[0024] Those skilled in the art should understand that in the disclosure of the present utility model, the terms "longitudinal", "lateral", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model and is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present utility model.

[0025] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one component can be one, while in other embodiments, the number of this component can be multiple. The term "one" should not be construed as a limitation on the quantity. Embodiment

[0026] Please refer to Figures 1-3 , an individualized external positioning guide plate for sacroiliac joint screws, including a plate body 1. The plate body 1 is provided with a fixed hole 2 for guiding and connecting with the screw. The plate body 1 is provided with a bending groove 3 for facilitating the bending adjustment of the plate body 1. The plate body 1 is provided with a plurality of fixed ends 11. The fixed hole 2 is opened on the fixed end 11. The fixed end 11 is set according to the number of screws to be driven in. The screw passes through the fixed hole 2 on the fixed end 11 to fix the plate body 1 on the sacroiliac joint of the patient.

[0027] Furthermore, a locking surface 21 is provided at the edge of one end of the fixing hole 2 where the screw enters. The locking surface 21 allows the screw to be guided to a certain extent during insertion, thereby ensuring that the screw can be accurately inserted into the fixing hole 2. The locking surface 21 is arranged at an angle, and the locking surface 21 is arranged in a circle. The locking surface 21 can be in close contact with the inner side of the end of the screw, which can increase the friction between the two, thereby improving the fixing stability of the screw in the plate body 1. A connecting thread 22 that can threadably cooperate with the screw is provided in the fixing hole 2. Before the screw is inserted into the patient's sacroiliac joint, the end of the screw is first preliminarily connected to the connecting thread 22, which can prevent the screw from being offset when it is subsequently inserted into the sacroiliac joint.

[0028] Furthermore, a bending groove 3 is provided on the plate body 1, and the bending groove 3 makes the thickness of the plate body 1 thinner at the bending portion, thereby making it easier for the doctor to bend the plate body 1. A plurality of extension ends 31 are provided on the bending groove 3, and each extension end 31 is respectively located between two adjacent fixed ends 11. The groove of the extension end 31 is located between the two fixed ends 11, so that the two fixed ends 11 can be better deformed and bent when bending. Arc surfaces 4 are provided at the edges of the bending groove 3. The arc surfaces 4 at the bending groove 3 can make the plate body 1 distribute stress more evenly when bending, reduce the possibility of stress concentration, and enable the plate body 1 to transition more smoothly during the bending process.

[0029] Among them, the outer edge of the plate body 1 is an arc chamfer, which can better disperse the force when under pressure, reduce local pressure, and thus reduce the risk of damage to surrounding tissues.

[0030] During use, the plate body 1 can be bent at the bending groove 3 by the doctor, and the bending groove 3 makes the thickness of the plate body 1 at the bending portion thinner, thereby making it easier for the doctor to bend the plate body 1. The bent plate body 1 fits the sacroiliac joint, and when the doctor inserts the screw into the patient's sacroiliac joint, the end of the screw first contacts the connecting thread 22 in the fixing hole 2, and the screw rotates to first pass through the connecting thread 22 and then move to be inserted into the patient's sacroiliac joint. The end of the screw is first preliminarily connected to the connecting thread 22, which can avoid the screw from being offset when it is subsequently inserted into the sacroiliac joint, and can ensure that the doctor can more stably insert the screw into the patient's sacroiliac joint.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. An individualized in vitro positioning guide for sacroiliac joint screws, characterized by: It comprises a plate body (1), on which a fixing hole (2) for guiding and connecting with a screw is provided; The plate body (1) is provided with a bending groove (3) for facilitating bending and adjustment of the plate body (1).

2. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 1, characterized in that: The plate body (1) is provided with a plurality of fixing ends (11), and the fixing holes (2) are opened on the fixing ends (11).

3. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 2, characterized in that: A locking surface (21) is provided at the edge of one end of the fixing hole (2) through which the screw enters.

4. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 3, characterized in that: The locking surface (21) is arranged obliquely, and the locking surface (21) is arranged in a ring shape.

5. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 4, characterized in that: The fixing hole (2) is provided with a connecting thread (22) capable of threadably matching with a screw.

6. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 5, characterized in that: The plate body (1) is provided with a bending groove (3).

7. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 6, characterized in that: The bending groove (3) is provided with a plurality of extension ends (31), and each of the extension ends (31) is respectively located between two adjacent fixed ends (11).

8. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 7, characterized in that: The edges of the bending grooves (3) are all provided with arc surfaces (4).

9. The individualized in vitro positioning guide for sacroiliac joint screws according to claim 8, characterized in that: The outer edge of the plate body (1) is chamfered in an arc shape.

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