Vertebral body boring cutter for auxiliary tool of bone expander

Abstract

The cone boring cutter for the bone expander auxiliary tool comprises a rod body, a triangular pyramid blade is formed at one end of the rod body, one side of the triangular pyramid blade protrudes to form a side blade, an axial chip groove is formed between every two adjacent blades of the triangular pyramid blade, and the axial chip groove is communicated with the side blade. The axial chip removal groove extends in the axial direction of the rod body and is formed in the side face of the rod body, the side face of the rod body is concavely provided with an annular chip removal groove, and the annular chip removal groove intersects with the axial chip removal groove. According to the utility model, under the condition that the diameter of a vertebral pedicle opening is not increased, the hole is expanded in the vertebral body through cutting, so that the fracture of the vertebral pedicle caused by an overlarge puncture diameter is reduced.

Description

Technical Field

[0001] The present application relates to orthopedic instruments, and in particular to a vertebral boring tool used as a bone expander auxiliary tool. Background Art

[0002] Vertebral compression fracture is a condition in which the height of the vertebra becomes shorter due to external force, which causes edema of the surrounding muscles and nerves, resulting in discomfort.

[0003] The pedicle is a part of the vertebral arch, located in the front of the vertebral arch, and refers to the narrow part where the vertebral arch connects to the vertebral body.

[0004] With the progress of society and the development of industry and transportation, the proportion of vertebral compression fractures is increasing.

[0005] A metal vertebral bone expander is used to treat vertebral compression fractures. The collapsed part of the fracture is expanded and bone cement is injected to fill it, thereby restoring the physiological height of the vertebra.

[0006] The narrow physiological structure of the pedicle determines that the maximum diameter of the bone expander's working area can only be within 5 mm. Too large a working diameter will destroy the structure of the pedicle, causing the pedicle to rupture and lead to secondary fractures. Utility Model Content

[0007] The utility model aims to provide a vertebral boring tool for a bone expander auxiliary tool, which can expand the hole inside the vertebral body by cutting without increasing the diameter of the pedicle opening, thereby reducing the pedicle rupture caused by excessive puncture diameter.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0009] An embodiment of the present application discloses a vertebral boring tool for a bone expander auxiliary tool, comprising a rod body, a triangular prism blade formed at one end of the rod body, a side blade protruding from one side of the triangular prism blade, an axial chip groove formed between two adjacent edges of the triangular prism blade, the axial chip groove extending along the axial direction of the rod body and formed on the side of the rod body, the side of the rod body being recessed to form an annular chip groove, the annular chip groove intersecting with the axial chip groove.

[0010] Preferably, in the above-mentioned vertebral boring tool for bone expander auxiliary tool, the annular chip groove is close to the triangular prism blade.

[0011] Preferably, in the above-mentioned vertebral boring tool for bone expander auxiliary tool, a rotating handle is formed at the tail of the rod body.

[0012] Preferably, in the above-mentioned vertebral boring tool for bone expander auxiliary tool, a bearing assembly is installed on the rod body near the rotating handle.

[0013] Preferably, in the above-mentioned vertebral boring tool for bone expander auxiliary tool, there is a positioning mark on the rotating handle.

[0014] Compared with the prior art, the utility model has a rod diameter of 4.4mm, and is cut with a working sleeve. The maximum diameter of the head cutting edge is 5.3mm, and the ideal working space of the bone expander is 6.5mm. By rotating the rod of the vertebral boring tool as the center, the head can just get a working space of 6.5mm to ensure that the bone expander can exert its expansion force to the maximum extent.

[0015] The utility model is designed with a triangular prism blade and a side blade on the head, which is convenient for longitudinal feeding and circumferential cutting of bone; the blade is designed with a guide oblique blade and a chip removal groove, which is convenient for longitudinal drilling along the pedicle during surgery and the discharge of bone chips during the drilling process.

[0016] The tail is designed with an AO-style quick-connect D-type interface, which is convenient for connecting a T-type quick-connect wrench. Through manual, continuous full-circle cutting, the ideal working space of the bone expander is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Shown is a stereoscopic view of a vertebral boring tool used as a bone expander auxiliary tool in an embodiment of the utility model;

[0019] Figure 2 Shown Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Combination Figure 1-2The vertebral boring tool for a bone expander auxiliary tool includes a rod body 100, a triangular prism blade 101 is formed at one end of the rod body 100, a side blade 102 is formed on one side of the triangular prism blade 101, an axial chip groove 103 is formed between two adjacent edges of the triangular prism blade 101, the axial chip groove 103 extends along the axial direction of the rod body 100 and is formed on the side of the rod body 100, and an annular chip groove 104 is formed on the side of the rod body 100, and the annular chip groove 104 intersects with the axial chip groove 103. The annular chip groove 104 is close to the triangular prism blade 101.

[0022] In this embodiment, the hole is enlarged by the side blade, and the bone chips after the hole is enlarged enter the chip discharge groove.

[0023] Furthermore, a rotating handle 105 is formed at the rear of the rod body 100. A bearing assembly 106 is installed near the rotating handle 105 of the rod body 100.

[0024] In this embodiment, it is convenient to rotate and excavate, and it is convenient to install other fixed tools to prevent the rotation from being affected.

[0025] Furthermore, there is a positioning mark (not shown) on the rotating handle 105 .

[0026] In this embodiment, it is convenient to locate the position during insertion, and the device can be pulled out according to the position during insertion, and the side blade can be pulled out from the position cut during insertion.

[0027] The specific operations are as follows:

[0028] 1. Confirm the needle insertion point under the C-arm and perform percutaneous puncture;

[0029] 2. Transpedicular puncture, the puncture depth is close to the front 1 / 4 of the vertebral body;

[0030] 3. Take out the puncture tool and gently tap the vertebral boring tool along the puncture channel to a depth of 1 / 4 of the posterior side of the vertebral body;

[0031] 4. Insert the working sleeve along the tail of the vertebral boring tool and connect the quick-connect handle;

[0032] 5. Manually rotate the vertebral boring tool along the working channel and stop when the drilling space is confirmed to be sufficient to accommodate the head of the bone expander under the C-arm;

[0033] 6. Remove the quick-connect handle, working sleeve, and cone boring tool;

[0034] 7. Insert the working cannula again and insert the bone expander along the channel to expand the vertebral body and restore the vertebral height;

[0035] 8. Remove the bone expander, prepare the bone cement, and inject the bone cement into the vertebral body through the working channel.

[0036] 9. Pull out the bone cement syringe and working cannula, and observe the bone cement diffusion and vertebral height recovery effect under the C-arm.

[0037] 10. Suture the wound.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A vertebral boring tool for a bone expander auxiliary tool, characterized in that: It includes a rod body, one end of which is formed with a triangular pyramidal blade, one side of which protrudes to form a side blade, an axial chip groove is formed between two adjacent edges of the triangular pyramidal blade, the axial chip groove extends along the axial direction of the rod body and is formed on the side of the rod body, the side of the rod body is recessed to form an annular chip groove, and the annular chip groove intersects with the axial chip groove.

2. The vertebral boring tool for a bone expander auxiliary tool according to claim 1, characterized in that: The annular chip removal groove is close to the triangular pyramidal edge.

3. The vertebral boring tool for a bone expander auxiliary tool according to claim 1, characterized in that: A rotating handle is formed at the rear of the rod body.

4. The vertebral boring tool for a bone expander auxiliary tool according to claim 3, characterized in that: A bearing assembly is installed on the rod body near the rotating handle.

5. The vertebral boring tool for a bone expander auxiliary tool according to claim 3, characterized in that: There is a positioning mark on the rotating handle.

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