A spinal drill with a chamfering device

Abstract

The present invention discloses a spinal drill with a chamfer, which includes a spinal drill and a chamfer matched therewith. The spinal drill includes a drill bit, a drill rod, a connecting rod, a connecting part, and a handle, and the chamfer includes a conical cap and a shell. The beneficial effect achieved by the present invention is that after the spinal drill is used to drill a hole in the spine, a conical inclined surface can be ground on the bone surface outside the drill hole after the chamfer is connected, so that the tail of the spinal bone screw can sink into the bone surface when the spinal bone screw is implanted, thereby improving the fixation effect of the bone screw and facilitating the operation.

Description

Technical Field

[0001] The invention relates to a spinal drill, in particular to a spinal drill with a chamfer, and belongs to the field of medical instruments. Background Art

[0002] Pedicle screw fixation is a common surgical procedure in spinal surgery. Pedicle screw fixation is required in cases of vertebral fractures and when spinal surgery affects spinal stability. Pedicle screw fixation requires drilling holes with a spinal drill at the pedicle of the spine, and then implanting bone screws. However, bone screws used for pedicle screw fixation are often large in size. After the bone screws are implanted and drilled, the tail of the screw is often significantly higher than the bone surface. On the one hand, it is not aesthetically pleasing and affects postoperative muscle attachment. On the other hand, it also affects the fixation effect of the bone screws.

[0003] At present, the spinal drills on the market only have the single function of establishing a bone screw implantation channel. After drilling, doctors often need to rely on the bone screw's own rotational extrusion force to bury the bone screw as far as possible into the bone surface during the implantation process to ensure the implantation and fixation effect. This is not only difficult to operate, but also prone to the risk of additional iatrogenic damage to the spine.

[0004] Therefore, in order to solve the above problems, a spinal drill with a chamfer was invented to allow the tail of the spinal bone screw to sink into the bone surface more easily during implantation, improve the fixation effect of the bone screw, and facilitate surgical operations. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention aims to solve the problem of providing a spinal drill with a chamfer.

[0006] The spinal drill with a chamfer comprises a spinal drill, and the spinal drill comprises a drill bit, a drill rod, a connecting rod, a connecting part, and a handle. The front end of the spinal drill is the drill bit, the drill bit continues backwards to form the drill rod, and the end of the drill rod is a drill rod base. A chamfer connecting seat is provided on the drill rod base, the drill rod base is connected backwards to the connecting rod, the rear of the connecting rod is the connecting part, and the connecting part continues backwards to form a handle. Its main feature is that it also includes a chamfer matching the spinal drill, the chamfer comprises a conical cap and a shell, the front end of the chamfer is a conical cap, the conical cap continues backwards to form a shell connecting part, the interior of the conical cap and the shell connecting part is a drill hole, the shell connecting part is connected to the shell, the interior of the shell is hollow, the end of the shell is the chamfer base, and the chamfer base is provided with a drill rod connecting part.

[0007] The spinal drill with a chamfering device is characterized in that the drill bit is a three-layer structure, which includes a drill bit outer layer, a drill bit middle layer, and a drill bit inner layer from the outside to the inside.

[0008] The spinal drill with a chamfer is characterized in that the drill bit rod is conical, and the angle of the conical surface is 3-4.2 degrees, preferably, the angle of the conical surface is 3.6 degrees.

[0009] The drill bit rod is tapered, the purpose of which is to increase the strength of the drill bit rod and facilitate use and operation.

[0010] The spinal drill with a chamfer is characterized in that the conical cap is lobed, and preferably, the number of lobes is 3.

[0011] In the present application, unless otherwise specified, the positional relationship of each component is based on the positional relationship shown in the drawings, and the devices, instruments, components, dimensions and other conditions used are well known in the art, or can be implemented by a technician in this field based on the description of the application and the prior art.

[0012] If the description of terms in the present invention is different from the previous description in the art, the description in this application shall prevail. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a side view of the present invention (after the chamferer is connected);

[0014] Figure 2 is a schematic diagram of a spinal drill and a chamfering device of the present invention after being separated;

[0015] Figure 3 is a side cross-sectional schematic diagram of the chamfering device of the present invention;

[0016] Figure 4 is a front view of the chamfering device of the present invention;

[0017] Figure 5 is a rear view of the chamfering device of the present invention;

[0018] Figure 6 It is a schematic diagram of the three-layer structure of the drill bit of the present invention;

[0019] Figure 7 is a schematic diagram of the angle of the tapered surface of the drill bit rod of the present invention;

[0020] The reference numerals in the figure are as follows: (1) handle; (2) connecting part; (3) connecting rod; (4) drill rod; (5) drill rod base; (6) chamfering device connecting seat; (7) drill bit; (8) drill bit outer layer; (9) drill bit middle layer; (10) drill bit inner layer; (11) chamfering device; (12) housing; (13) chamfering device base; (14) drill rod connecting part; (15) hollow; (16) conical cap; (17) housing connecting part; (18) drill hole. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Embodiment 1: A structure of a spinal drill with a chamfer.

[0023] As attached Figure 1-5 The present invention discloses a spinal drill with a chamfering device, wherein the front end of the spinal drill is a drill bit (7), the drill bit (7) is extended backwards to form a drill rod (4), the end of the drill rod (4) is a drill rod base (5), a chamfering device connecting seat (6) is provided on the drill rod base (5), the drill rod base (5) is connected backwards to a connecting rod (3), the rear of the connecting rod (3) is a connecting part (2), and the connecting part (2) is extended backwards to form a handle (1); the chamfering device (11) comprises a conical cap (16) and a shell The chamfering device (11) comprises a body (12), the front end of the chamfering device (11) is a conical cap (16), the conical cap (16) is extended backward to form a shell connecting portion (17), the conical cap (16) and the shell connecting portion (17) are provided with a drill hole (18), the shell connecting portion (17) is connected to the shell (12), the shell (12) is hollow (15), the end of the shell (12) is a chamfering device base (13), and the chamfering device base (13) is provided with a drill rod connecting portion (14).

[0024] Embodiment 2: The chamfering device structure when the number of lobes of the conical cap of the chamfering device is 3.

[0025] As attached Figure 4 and 5 As shown, the conical cap (16) of the chamfering device (11) is a conical inclined surface, and the conical cap (16) is a three-lobed structure with the same size and spacing, and the center is a drill hole (18).

[0026] Embodiment 3: Three-layer structure of the drill bit.

[0027] As attached Figure 6 As shown: the drill bit (7) is a three-layer structure, which includes a drill bit outer layer (8), a drill bit middle layer (9), and a drill bit inner layer (10) from the outside to the inside.

[0028] Embodiment 4: Conical surface angle of drill bit shank.

[0029] As attached Figure 6 As shown: the drill bit shank is tapered, and the preferred angle of the tapered surface is 3.6 degrees.

[0030] The purpose of the implementation method described above is to further illustrate the specific implementation method of the present invention, and it is not to impose any limitation on the present invention. Any simple modification, change and equivalent structural change made according to the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A spinal drill with a chamfering device, comprising a spinal drill, the spinal drill comprising a drill bit, a drill rod, a connecting rod, a connecting portion, and a handle, the front end of the spinal drill is a drill bit, the drill bit is extended backwards to form a drill rod, the end of the drill rod is a drill rod base, a chamfering device connecting seat is provided on the drill rod base, the drill rod base is connected backwards to the connecting rod, the rear of the connecting rod is the connecting portion, and the connecting portion is extended backwards to form a handle, and its main features are: it also includes a chamfering device matching the spinal drill, the chamfering device includes A conical cap and a shell, the front end of the chamfering device is a conical cap, the conical cap extends backward to form a shell connecting part, the inside of the conical cap and shell connecting part is a drill hole, the shell connecting part is connected to the shell, the inside of the shell is hollow, the end of the shell is a chamfering device base, and a drill rod connecting part is provided inside the chamfering device base; the drill bit is a three-layer structure, including a drill bit outer layer, a drill bit middle layer, and a drill bit inner layer from the outside to the inside; the drill bit rod is conical, and the angle of its conical surface is 3-4.2 degrees; the conical cap is lobed.

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