CN220275691U - Bone screw facilitating cable penetration - Google Patents

Abstract

The utility model relates to a bone screw that facilitates the penetration of cables, including: a screw head, including a crown structure and a thread structure, wherein the crown structure includes at least a pair of perforations, and the perforations are used for threading cables and fixing the bone. The screw is attached to the bone plate, the outer surface of the threaded structure has a first thread, and the inner bottom surface of the coronal structure has a star-shaped locking groove. The utility model does not need to drill holes in the bone plate for passing cables. Its advantage is that it can not only reduce the processing cost when making the bone plate, but also avoid the bone plate from being damaged due to the weakened strength of the bone plate and the influence of stress. destroy.

Description

A bone screw that facilitates cable threading

Technical field

The utility model relates to the technical field related to medical bone screws, in particular to a bone screw that facilitates the threading of cables.

Background technique

There are 206 adult bones, which are divided into four parts: skull, trunk bones, upper limb bones, and lower limb bones. They are distributed in various parts of the body. The bones of the human body play a role in supporting the body and protecting internal organs. The reason why the body can make various postures and movements generally relies on bones, muscles and various joints. Cooperate with each other to complete.

All bones in the human body vary in shape and size. Some are larger, such as tibia, humerus, etc., while some are smaller, such as phalanges, etc. According to the shape of bones, they can be divided into five types: long bones, short bones, flat bones, irregular bones and air-containing bones.

When the above-mentioned bones in the human body suffer from fractures, the treatment method can be open reduction and internal fixation. The method is to cut the skin and muscles and other soft tissues at the fracture site to expose the bones to facilitate the repair of fractures and dislocations. Operation. During open reduction, the internal fixator is locked in the patient's body to complete the fixation of the fracture end. In addition, depending on the fractures at different locations, corresponding internal fixation methods can also be used, and corresponding internal fixation equipment can be selected as needed, such as bone plates, bone pins, intramedullary needles (nails), screws, cables, stainless steel Silk and so on.

Among the above-mentioned internal fixation devices, the screws are mostly cylindrical in appearance and have threaded grooves with a concave and convex structure on the surface, and the screws can use this threaded structure to be locked on the bone plate and bone.

However, sometimes the screws fixed to the bone plate loosen, which usually causes the bone plate to loosen, resulting in slow healing of the fracture site, or even failure of the bone plate implantation. Therefore, in order to avoid the above situation, some existing technologies will install the bone plate on the bone. Several perforations are made on the plate. After the bone plate is installed at the fracture site, multiple stainless steel wires (or titanium alloy cables) are used to pass through the perforations of the bone plate (as shown in Figure 1), and then the stainless steel wires are used. (or titanium alloy cables) to strengthen the fixation of the bone plate and the bone. However, this method of strengthening the fixation will not only increase the stress to increase the force per unit area of the bone plate, but also pressurize the periosteum and cause the fracture site. Poor blood transportation; in addition, multiple perforations in the bone plate will also destroy the original strength of the bone plate.

Based on the above deficiencies, there is an urgent need to further develop technology suitable for strengthening bone plate fixation so that the damaged fracture site can recover well after surgery.

Utility model content

In order to solve the above problems, unlike the existing technology of threading cables on the bone plate, the purpose of this utility model is to provide a bone screw that facilitates the threading of cables, including: a screw head, including a coronal structure and Threaded structure, wherein the coronal structure includes at least one pair of through holes, the through holes are used to pass cables to fix the bone screw on the bone plate, the outer surface of the threaded structure has a first thread, and the inner bottom surface of the coronal structure has a star-shaped lock Solid groove.

In one embodiment, the above-mentioned bone screw further includes a threaded portion connected to the screw head and extending from the lower end of the screw head to form a second thread on the surface of the threaded portion; and a tapered portion forming the threaded portion. The lower end of the cone has a tip, and at least one cutting groove is formed on the surface of the cone and extends to the second thread.

In one embodiment, the at least one pair of through holes is symmetrical.

In one embodiment, the diameter of the through hole in the screw head ranges from 1.0 to 2.0 mm.

In one embodiment, the diameter of the screw head is larger than the diameter of the threaded part.

In one embodiment, the diameter of the screw head is larger than the diameter of the cone portion.

In one embodiment, the star-shaped locking groove includes an inverted cone body.

In one embodiment, the locking groove includes at least four channel-shaped structures, and at least four channel-shaped structures surround the conical body.

In one embodiment, the number of the channel-shaped structures is six.

In one embodiment, the bone screw is made of steel, titanium or titanium 6 aluminum 4 vanadium.

Description of drawings

Figure 1 is a structural diagram of a bone plate that can be used for cable penetration in the prior art.

Figure 2 is an external structural diagram of a bone screw that facilitates cable penetration according to the present invention.

Figure 3 is another structural diagram of the bone screw of the present invention that facilitates cable penetration.

Figure 4 is a schematic diagram of a bone screw structure that facilitates cable penetration according to an embodiment of the present invention.

Figure 5 is a schematic diagram of a bone screw structure that facilitates cable penetration according to another embodiment of the present invention.

Figure 6 is a schematic diagram of the bone screw structure of the present invention, which is penetrated by cables.

Figure 7 is a schematic diagram of the details of the screw head of the bone screw of the present invention that facilitates cable penetration.

Figure 8 is a schematic view of the screw head of the bone screw of the present invention from another angle, which facilitates cable penetration.

Figure 9 is a schematic view of the details of the screw head of the bone screw of the present invention that facilitates cable penetration from another angle.

Figure 10 is a schematic diagram of a bone screw fixed on a bone plate according to an embodiment of the present invention.

Figure 11 is a schematic diagram of a bone screw with cables inserted into the bone plate according to an embodiment of the present invention.

Marked in the figure are as follows:

200:Bone Screw

202: screw head

202a: Crown structure

202b:Thread structure

204:Thread part

206: Taper

216:Perforation

208:Second thread

212: Tip

210:Cutting groove

214:First thread

302:Cable

410: Locking groove

410a: Inverted cone body

410b: Channel-like structure

502:Bone plate

504: Bones

Detailed ways

The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand the effects and advantages of the present invention through the contents of this specification. Moreover, the present utility model can also be used and implemented through other specific embodiments. Various details described in this specification can also be applied based on different needs, and various modifications or modifications can be made without departing from the content of the present utility model. change.

The present utility model will be described with preferred embodiments and viewpoints. Such descriptions are to explain the structure of the present utility model and are only used to illustrate but not to limit the patentable scope of the present utility model. Therefore, in addition to the preferred embodiments in the specification, the present invention can also be widely implemented in other embodiments.

The utility model is a bone screw 200 that facilitates the threading of cables. The utility model provides two appearances, as shown in Figures 2 and 3. The bone screws 200 shown in Figures 2 and 3 both include screw heads. The difference between the two shapes is the crown structure 202a of the screw head; the crown structure 202a of the screw head in Figure 2 presents a conical structure that expands from the top to the waist, while Figure 3 The crown structure 202a of the screw head presents a cylindrical structure from the top to the waist.

For ease of explanation, all the following figures only use the bone screw 200 shown in FIG. 2 as an example. As shown in Figures 4 and 5, Figure 4 is a front view of the bone screw 200, and Figure 5 is a side view of the bone screw 200. The above-mentioned bone screw includes a screw head 202, a threaded portion 204, and a tapered portion 206. The screw head 202 (including a crown structure 202a and a threaded structure 202b) has a plurality (2) through holes 216, and the threaded structure 202b There is a first thread 214 on the outside; the thread portion 204 extends from the lower end of the thread portion 202, and the surface of the thread portion 204 has a second thread 208; the tapered portion 206 is formed at the lower end of the thread portion 204 and has a tip 212. In addition, at least one cutting groove 210 is provided on the surface of the tapered portion 206 , and the cutting groove 210 extends to the second thread 208 of the threaded portion 204 .

Referring to Figures 4 and 5, the screw head 202, the threaded portion 204 and the tapered portion 206 of the bone screw 200 of the present invention are integrally formed in sequence, and the plurality (2) through holes 216 of the screw head 202 can be used to thread cables. line to facilitate the strengthening and fixation of bone screws to the bone plate. The diameter of the screw head 202 is larger than the diameter of the threaded portion 204 and the tapered portion 206, and since there is a first thread 214 on the outer surface of the thread structure 202b of the screw head 202, the above-mentioned structure is used to penetrate the bone screw into a bone plate. And it is fixed inside the bone, and is screwed and locked on the above-mentioned bone plate with the first thread 214, and the diameter of the screw head 202 is larger than the diameter of the threaded part 204 to ensure that it can be recognized that the bone screw has been fixed inside the bone. In one embodiment, the length of the screw head 202 of the bone screw 200 can remain unchanged, but the threaded portion 204 and the tapered portion 206 can have appropriate lengths according to the sizes of different bones. For example, in a special case, the threaded portion 204 The taper portion 206 can be omitted, and only the screw portion 202 (including the crown structure 202a and the thread structure 202b) is retained.

In one embodiment, FIG. 6 shows an embodiment in which a cable 302 is threaded through the screw head 202 of the bone screw of the present invention. The bone screw of the present invention can be directly inserted into the bone plate through hole and inside the bone. The cable 302 can also be used to penetrate the screw head 202 of the bone screw to further strengthen the fixation of the bone plate and the bone screw. In one embodiment, in order to enable the plurality (2) through holes 216 of the screw head 202 to be used for passing the cable 302, the diameter of each through hole ranges from 1.0 to 2.0 mm.

In one embodiment, the structure of the bone screw head 202 is shown in Figures 7 to 9. Figure 7 is a perspective view of the bone screw head 202. Figure 8 is a top view of the bone screw head 202. Figure 9 This is a front view of the bone screw head 202.

The screw head 202 of the bone screw has two through holes 216, and the arrangement of the through holes is symmetrical and opposite, so as to be used for passing cables. In one embodiment, referring to FIG. 9 , the diameter of each through hole 216 ranges from 1.0 to 2.0 mm. In one embodiment, referring to FIG. 8 , the inner side of the above-mentioned screw head 202 is a hollow structure, and a locking groove 410 is provided at the inner bottom of the screw head.

Please refer to Figures 7 to 9 together. As shown in the figures, the top of the bone screw of the present invention is a screw head 202, and a locking groove 410 is provided at the inner bottom of the screw head, so that the bone screw can be easily locked. On the bone plate and bone, the above-mentioned locking groove 410 is a star-shaped structure (as shown in Figure 8), which includes an inverted cone body (as the groove body) 410a and a plurality of channel-shaped structures 410b, so that the operator can The corresponding tool is inserted into the locking groove 410 and locks the bone screw on the bone and bone plate.

In one embodiment, the number of the plurality of channel-shaped structures 410b is at least four, and at least four channels-shaped structures 410b surround the conical body 410a.

In one embodiment, the preferred number of the channel-shaped structures 410b is six.

In one embodiment, the bone screw material can be titanium metal or titanium 6 aluminum 4 vanadium (Ti6Al4V). In another embodiment, the material of the above-mentioned bone screw can be steel.

As shown in Figures 4 and 5, the bottom of the bone screw 200 of the present invention is a cone portion 206. The above-mentioned cone portion 206 is an inverted cone, and the cone portion has a tip that can be used to drill through the bone surface. of hard bone; in addition, at least one cutting groove 210 is provided on the surface of the tapered portion 206. The cutting groove 210 can be used to enhance the strength of the cutting, and the cutting groove can be used to fix the bone screw 200 of the embodiment of the present invention to the hard bone. On the bone.

As shown in FIG. 10 , a bone screw 200 of the present invention fixed on a bone plate 502 is shown according to an embodiment. After the operator inserts the bone screw into the perforation of the bone plate, the operator inserts the corresponding tool into the locking groove of the screw head and twists it, so that the cone part of the bone screw and at least one cutting groove penetrate the hard part of the bone 504 The screw portion 204 is mostly inserted into the bone 504, and the second thread 208 of the screw head is screwed and locked on the bone plate 502 to complete the fixation of the bone plate 502 on the bone 504.

In one embodiment, when the operator observes the severity of the patient's fracture and decides that the bone plate fixed on the bone needs to be strengthened, the operator can wrap the cable around the bone and the bone according to an embodiment as shown in Figure 11. The bone plate is passed through the hole of the screw head 202 of the bone screw 200, and then the cable 302 is fixed. In one embodiment, the above fixation method can not only enhance the stability of the bone screw 200 fixed on the bone plate 502 in the embodiment of the present invention, but also lock the bone plate 502 on the bone 504 . In one embodiment, the bone screw 200 of the present invention can be used to fix the bone plate 502 of different fracture parts (such as humerus, radius, tibia, femur, etc.), and the cable 302 can be passed through the bone screw 200 The screw head 202 is further strengthened and fixed.

In the embodiment of the present invention, there is no need to drill holes in the bone plate for passing cables. This has the advantage of not only reducing the processing cost when making the bone plate, but also preventing the bone plate from weakening due to its own strength. and be damaged by stress. In one embodiment, the above-mentioned cable material can be titanium metal or titanium 6 aluminum 4 vanadium (Ti6Al4V) material. In another embodiment, the material of the above-mentioned cable can be steel. In one embodiment, since the bone screws and cables are made of titanium metal or titanium 6 aluminum 4 vanadium (Ti6Al4V), they should not cause allergic reactions in the human body after being implanted into the human body.

The above description is the preferred embodiment of the present utility model. Those skilled in the art should be able to understand that it is for illustration rather than for limiting the scope of the patent rights claimed by the present utility model. The scope of patent protection shall depend on the scope of the attached patent application and its equivalent fields. Any changes or modifications made by those skilled in the field without departing from the content or scope of this patent shall be equivalent changes or designs completed under the disclosure of this utility model, and shall be included in the above-mentioned application. within the scope of the patent.

Claims (10)

1. A bone screw that facilitates the threading of cables, which is characterized in that it includes: A screw head includes a crown structure and a thread structure, wherein the crown structure includes at least a pair of through holes, which are used to pass cables to fix the bone screw on the bone plate, and the outer surface of the thread structure has a first thread, wherein The inner bottom surface of the crown structure has a star-shaped locking groove. 2. The bone screw that facilitates cable threading according to claim 1, further comprising: A threaded portion is connected to the threaded portion and extends from the lower end of the threaded portion to form a second thread on the surface of the threaded portion; and A tapered portion forms the lower end of the threaded portion, the tapered portion has a tip, and at least one cutting groove is formed on the surface of the tapered portion and extends to the second thread. 3. The bone screw that facilitates cable penetration according to claim 1, characterized in that the above-mentioned at least one pair of through holes is left and right symmetrical. 4. The bone screw according to claim 3, which facilitates the threading of cables, characterized in that the diameter of the through hole in the screw head ranges from 1.0 to 2.0 mm. 5. The bone screw according to claim 2, which facilitates the threading of cables, wherein the diameter of the screw head is larger than the diameter of the threaded part. 6. The bone screw according to claim 2, which facilitates the threading of cables, wherein the diameter of the screw head is larger than the diameter of the cone portion. 7. The bone screw that facilitates cable penetration according to claim 1, wherein the star-shaped locking groove includes an inverted cone body. 8. The bone screw that facilitates cable penetration according to claim 7, wherein the locking groove includes at least four channel-like structures, and at least four channel-like structures surround the vertebral body. 9. The bone screw that facilitates cable penetration according to claim 8, characterized in that the number of the channel-shaped structures is six. 10. The bone screw that facilitates cable threading according to claim 1, characterized in that the bone screw is made of steel, titanium or titanium 6 aluminum 4 vanadium.