A spinal pedicle screw placement navigation template

Abstract

A spinal pedicle screw placement navigation template, comprising a navigation template body and two guide columns arranged on the navigation template body, wherein the inner side surface of the navigation template body has a three-dimensional curved surface that coincides with the use position, and the middle part of the three-dimensional curved surface has a curved surface feature that coincides with the spinous process bony marker at the use position; the two guide columns are arranged on both sides of the navigation template body, and through holes are arranged in the guide columns. The spinal pedicle screw placement navigation template provided by the present invention makes full use of the structural characteristics of the vertebral pedicle where the screw is placed and the spinous process markers, etc., and combines 3D printing technology to produce a navigation template that fits the surgical site and can be quickly placed in the surgical site, thereby achieving accurate and rapid screw placement.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a spinal pedicle screw placement navigation template. Background Art

[0002] When the human spine has scoliosis, deformity, and spondylolisthesis reduction, surgical treatment using spinal screws is a common and effective means. Spinal screw fixation, also known as spinal pedicle screw fixation, requires accurate placement of screw holes and screws at appropriate positions of the spinal pedicles. Existing methods of placement rely on the doctor's experience to perform manual operations to insert the pedicle screws. This method of operation is prone to deviations in the position of the holes due to human factors, and deviations in the position of the pedicle screws. Severe deformities may even result in the inability to place screws, affecting the treatment time and treatment effect. The main reason for this is that the anatomical structure around the screws is relatively narrow, and it is adjacent to important anatomical structures such as blood vessels, nerves, and the spinal cord. Mistakes in spinal pedicle screw fixation may cause irreversible damage such as spinal nerve root damage and vertebral artery damage, and may even endanger life. Therefore, accurate and rapid placement of screws to avoid damage to surrounding tissues plays a key role in the treatment effect.

[0003] 3D printing technology is an emerging rapid manufacturing method that provides new ideas and methods for individualization and precision in the diagnosis and treatment of clinical diseases. 3D printing technology can produce models with various complex surfaces. The combination of navigation template technology and 3D printing technology can give full play to their respective technical advantages.

[0004] The navigation template used in the spinal pedicle screw fixation in the prior art does not make good use of the structural characteristics of the spinal pedicles, spinous process markers, etc., so that the navigation template does not fit the spine well, and thus cannot be quickly placed in the appropriate position, and the screw holes and screws cannot be accurately placed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a spinal pedicle screw placement navigation template, which fully utilizes the structural characteristics of the vertebral pedicle where the screw is placed to achieve accurate and rapid screw placement.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A spinal pedicle screw placement navigation template comprises a navigation template body and two guide columns arranged on the navigation template body, the inner side surface of the navigation template body has a three-dimensional curved surface that coincides with a use position, the inner side surface is a side surface that is in contact with the spine, and the middle part of the three-dimensional curved surface has a curved surface feature that coincides with a spinous process bony marker at the use position; the two guide columns are arranged on both sides of the navigation template body, and through holes are arranged in the guide columns.

[0008] Furthermore, the outer side surface of the navigation template body has the same three-dimensional curved surface as the inner side surface, so that the navigation template body is an integral whole, and the outer side surface is the other side of the navigation template opposite to the inner side surface.

[0009] Furthermore, two guide columns are fixedly arranged on both sides of the outer side surface of the navigation template body.

[0010] Furthermore, the guide column is a rectangular guide column, and the rectangular shape is convenient for doctors to straighten during surgery, and at the same time has an anti-slip function to ensure the stability of the guide plate.

[0011] Furthermore, a pull rod is arranged between the two guide posts.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. High stability in fitting with the bone surface. The inner side of the navigation template is reconstructed and designed according to the CT scan data of the patient's pedicle to be operated on to form a three-dimensional curved surface that can fit the pedicle, so that it fits tightly with the use site during use. It has very high stability, avoiding the shaking of the pedicle screw during surgery and ensuring that there will be no deviation when the pedicle screw is inserted, thereby achieving the best surgical effect;

[0014] 2. Improve the accuracy / precision of screw placement. The navigation template body fully utilizes the structural characteristics of the vertebral pedicle where the screw is placed. After the navigation template is stabilized, the screw can be placed accurately;

[0015] 3. Improve the efficiency of nail placement and achieve rapid nail placement. The navigation template can be quickly placed in the appropriate position, which greatly improves the efficiency of nail placement, reduces operation time, and improves operation efficiency and success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] In the figure, 1. navigation template body, 2. three-dimensional surface, 3. surface features of overlapping spinous process bony landmarks, 4. guide column, 5. through hole, 6. pull rod. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention. It should also be understood that after reading the contents of the present invention, those skilled in the art may make various simple equivalent changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims of the present application.

[0019] like Figure 1As shown, a spinal pedicle screw placement navigation template comprises a navigation template body 1 and two guide posts 4 arranged on the navigation template body 1, the inner side of the navigation template body 1 has a three-dimensional curved surface 2 that coincides with the use position, the inner side is a side that fits and contacts the spine, the middle part of the three-dimensional curved surface 2 has a curved surface feature 3 that coincides with the spinous process bony marker at the use position, and can be abutted against the surface of the corresponding part of the spine after the spinal pedicle screw placement navigation template is assembled on the spine, and the navigation template body 1 is based on the patient's The navigation template body 1 is designed by reconstructing the 3D model obtained by CT or MRI scanning data of the pedicle to be operated and integrally formed by 3D printing technology. The two guide columns 4 are arranged on both sides of the navigation template body 1, and through holes 5 are arranged in the guide columns 4. The navigation template body 1 can be used in conjunction with bone screws (not shown) to punch holes in corresponding positions of the spine so as to install screw fixing devices such as screw plates or screw rods, thereby completing the screw placement, so that the spinal pedicle screw placement navigation template is arranged on the spine.

[0020] Furthermore, the outer side surface of the navigation template body 1 has the same three-dimensional curved surface as the inner side surface, so that the navigation template body 1 is a whole, and the outer side surface is the other side of the navigation template opposite to the inner side surface.

[0021] Furthermore, two guide columns 4 are fixedly provided on both sides of the outer side surface of the navigation template body 1 .

[0022] Furthermore, according to the physiological characteristics of the patient's pedicles, the guide posts 4 provided on the navigation template are two rectangular guide posts 4, the rectangular shape is convenient for the doctor to straighten during surgery, and has an anti-slip function to achieve the stability of the guide plate; a through hole 5 is provided in the rectangular guide post 4, and the through hole 5 will directly pass through the navigation template body 1, so that the top surface of the guide post 4 is connected to the inner side surface of the navigation template, and the through hole 5 is preferably a cylindrical through hole, and the cylindrical through hole is used for nail placement, and the height size of the guide post 4 can be used to accurately limit the depth according to the nail placement depth design. According to the patient's image CT or MRI scan data, the height of the guide post is designed by measuring the actual nail insertion depth and angle, which can play a role in limiting the nail placement depth of the nail placement tool.

[0023] Furthermore, a pull rod 6 is provided between the two guide columns 4 for strengthening the strength of the guide hole of the navigation template, for facilitating the placement of the navigation template, and for the operator to support and adjust the device during the operation, so as to facilitate the control of the device and better perform the pedicle screw insertion.

[0024] The inner side of the navigation template body 1 of the present invention is reconstructed and designed according to the CT scanning data of the pedicle part of the patient to be operated on to form a three-dimensional curved surface 2 that can fit the pedicle of the use part. The designed three-dimensional curved surface has a curved surface feature that coincides with the spinous process bone marker, so that the spinal pedicle screw placement navigation template is arranged on the spine and abuts against the surface of the corresponding part of the spine, and forms a high fit stability with the bone surface; according to the physiological characteristics of the patient's pedicle, two rectangular guide columns 4 are designed on the navigation template, and the rectangular guide columns 4 have cylindrical holes for screw placement, and the height size of the guide columns 4 can be designed according to the screw placement depth to accurately limit the depth. The device of the present invention can quickly and accurately place the navigation template firmly at the corresponding position of the pedicle, accurately place the screw, and can also accurately limit the depth of the screw hole, so as to achieve fast and accurate screw placement, reduce the doctor's operation time, greatly improve the success rate of the operation, and reduce the possibility of secondary injury to the patient.

Claims

1. A spinal pedicle screw placement navigation template, comprising a navigation template body and two guide columns arranged on the navigation template body, characterized in that: The inner side surface of the navigation template body has a three-dimensional curved surface that coincides with the use position, and the middle part of the three-dimensional curved surface has a curved surface feature that coincides with the spinous process bony marker at the use position; the two guide columns are arranged on both sides of the outer side surface of the navigation template body, and a through hole is arranged in the guide column, and the through hole passes through the navigation template body, so that the top surface of the guide column is connected with the inner side surface of the navigation template for nail placement; the height dimension of the guide column is used for accurate depth limitation according to the nail placement depth; The outer side surface of the navigation template body has the same three-dimensional curved surface as the inner side surface, so that the navigation template body is an integral whole; The navigation template body is designed based on a 3D model reconstructed from CT or MRI scan data of the patient's pedicle to be operated on, and then integrally formed through 3D printing technology. The navigation template body is assembled on the corresponding part of the patient's spine.

2. A spinal pedicle screw placement navigation template according to claim 1, characterized in that: The guide column is a rectangular parallelepiped guide column.

3. A spinal pedicle screw placement navigation template according to claim 1, characterized in that: A pull rod is arranged between the two guide columns.

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