CN213345891U - Solid bolt capable of enhancing strength of hollow screw after implantation - Google Patents

Abstract

The utility model discloses a pair of can strengthen solid bolt of hollow screw implantation back intensity, including solid bolt body, solid bolt body is including the inflation portion and the solid portion of interconnect, the inflation portion is located the top of solid portion, solid bolt body is under free state the maximum external diameter of inflation portion is greater than solid portion, the inflation portion has elasticity, the external diameter of inflation portion can dwindle. Because the biggest external diameter of inflation portion under free state is greater than solid portion, the utility model discloses a solid bolt is after implanting hollow screw, the outer wall of inflation portion and hollow screw's inner wall butt for solid bolt and hollow screw keep fixed, when packing into, only need apply external force make the inflation portion internal contraction can and push into solid bolt can, compare prior art and turn round the mode of going into solid bolt and be difficult to lead to solid bolt fracture.

Description

Solid bolt capable of enhancing strength of hollow screw after implantation

Technical Field

The utility model relates to the field of medical supplies, in particular to a solid bolt capable of enhancing the strength of a hollow screw after being implanted.

Background

In the process of treating bone fracture, the two ends of the bone fracture are usually fixedly connected by hollow screws to play a role of temporary fixation. After the bones are butted in the operation or after the postoperative fracture is healed, the bones are removed after the judgment of a clinician.

The hollow screw on the market at present can pass through a guide pin for temporarily fixing a fracture block due to the hollow design of the screw, so that the bone block is fixed, but the strength of the screw is reduced due to the hollow design of the screw. The strength of the solid screw is better than that of the hollow screw, but the solid screw does not have the advantages of simple and convenient operation process, exact fixing position and the like, so that the solid screw has less extensive indications than the hollow screw in the orthopedic operation.

Therefore, in the prior art, a solid bolt capable of enhancing the strength of the hollow screw after being implanted is provided, and the solid bolt is matched with the hollow screw in a threaded connection mode, but actually, the solid bolt is screwed into the hollow screw in a groove mode and the like because the minimum diameter of the hollow part of the hollow screw is only very small in the clinical application process, and the outer diameter of the solid bolt is also very small, so that the solid bolt is very easy to twist off, and the design scheme is not successfully converted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a solid bolt which can enhance the strength of the hollow screw after being implanted.

The utility model provides a pair of can strengthen solid bolt of hollow screw implantation back intensity, including solid bolt body, solid bolt body is including the inflation portion and the solid portion of interconnect, the inflation portion is located the top of solid portion, solid bolt body is under free state the maximum external diameter of inflation portion is greater than solid portion, inflation portion has elasticity, the external diameter of inflation portion can reduce.

The utility model provides a pair of can strengthen solid bolt of hollow screw implantation back intensity has following beneficial effect at least: because the biggest external diameter of inflation portion under free state is greater than solid portion, the utility model discloses a solid bolt is after implanting hollow screw, the outer wall of inflation portion and hollow screw's inner wall butt for solid bolt and hollow screw keep fixed, when packing into, only need apply external force make the inflation portion internal contraction can and push into solid bolt can, compare prior art and turn round the mode of going into solid bolt and be difficult to lead to solid bolt fracture.

As a sub-solution to the above technical solution, the top surface of the expansion part is provided with a slit, and the slit traverses the solid plug body. Through setting up the seam for the inflation portion has the ability of contracting inwards to the seam, thereby makes the external diameter of inflation portion can expand or reduce.

As some sub-solutions of the above technical solution, the number of the slots is two, and the two slots are perpendicular to each other. Set up two mutually perpendicular's seam to can make the inflation portion can all can inwards contract when receiving the inboard power of directional inflation portion in all directions, need not carry out circumference location when packing into the solid bolt, it is more convenient to install.

As a sub-scheme of the above technical scheme, a transition section is arranged on the outer circumferential surface of the solid plug body, the transition section includes a large end and a small end, the large end is located above the small end, the outer diameter of the large end is greater than that of the small end, the large end is connected to the expansion portion, and the small end is connected to the expansion portion or the solid portion. Through above setting, utilize the changeover portion, can utilize the changeover portion to make the inflation portion contract in pushing into hollow screw solid bolt, it is more convenient to assemble.

As a sub-solution of the above technical solution, a guide section is provided at a lower portion of the solid portion. The guide section is arranged to facilitate the solid part to enter the hollow screw conveniently.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of an embodiment of the present invention under a hollow screw in an unpacked state;

fig. 2 is a schematic structural view of the hollow screw according to the embodiment of the present invention in a state of being installed.

In the drawings: 100-an expansion part; 110-slotting; 120-a transition section; 200-solid part; 210-guide section.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Additionally, appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.

In the description of the present invention, if there is a phrase containing a plurality of parallel features, the phrase defined therein is the closest feature, for example: b, C disposed on A, E connected to D, B disposed on A, E connected to D, C is not limited; however, terms indicating relationships between features such as "spaced apart", "arranged in a ring", etc. do not fall within this category. The phrase preceded by the word "mean" indicates that it is a definition of all features in the phrase, and if it is B, C, D, it indicates that both B, C and D are located on a.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the present embodiment relates to a solid bolt capable of enhancing post-implantation strength of a cannulated screw, comprising a solid bolt body including an expansion part 100 and a solid part 200 connected to each other, the expansion part 100 being located above the solid part 200, the solid bolt body having a maximum outer diameter of the expansion part 100 larger than the solid part 200 in a free state, the expansion part 100 having elasticity, and the outer diameter of the expansion part 100 being reducible.

Because the biggest external diameter of inflation portion 100 under free state is greater than solid portion 200, the utility model discloses a solid bolt is after implanting hollow screw, the outer wall of inflation portion 100 and hollow screw's inner wall butt for solid bolt and hollow screw keep fixed, when packing into, only need apply external force make inflation portion 100 internal contraction can and push into solid bolt can, compare prior art and turn round the mode of going into solid bolt and be difficult to lead to solid bolt fracture. In addition, because the outer wall of the expansion part 100 is abutted with the inner wall of the hollow screw, the solid bolt has the effect of enhancing the strength of the hollow screw better than that of the existing solid bolt, and is fixed by virtue of the abutment of the expansion part 100 and the hollow inner cavity, so that the matching property between the solid bolt and the hollow screw can be enhanced, and when the screw is taken out, the solid bolt does not have any residual part to be left in the screw groove, so that the influence on taking the screw is avoided; in addition, this solid bolt adopts from inflation formula design, makes solid bolt get into behind the hollow cavity of hollow screw, can not increase the unexpected risk of operation because of solid bolt takes place to slide and move back scheduling problem, and the structure is more firm, reliable.

The minimum diameter part of the inner diameter of the hollow screw is only 0.8mm in clinical application, and the solid bolt is easily twisted off by screwing the solid bolt in a spiral mode, so that the hollow screw has no clinical practicability. In contrast, the solid plug of the present embodiment is fixed by clamping or pressing, so that the solid plug is not easily broken.

Specifically, the top surface of the expansion part 100 is provided with two slits 110, the slits 110 traverse the solid bolt body, and the two slits 110 are perpendicular to each other. By providing the slit 110, the expansion part 100 has the capability of retracting inward to the slit 110, so that the outer diameter of the expansion part 100 can be reduced, and furthermore, the expansion part 100 can achieve elasticity and the outer diameter can be reduced by using an elastic material or providing a thin-walled structure, but not limited thereto. And two mutually perpendicular slots 110 are arranged, so that the expansion part 100 can be inwards contracted when being subjected to force pointing to the inner side of the expansion part 100 in all directions, circumferential positioning is not needed when the solid bolt is installed, and the installation is more convenient.

Specifically, a transition section 120 is arranged on the outer peripheral surface of the solid bolt, the transition section 120 includes a large end and a small end, the outer diameter of the large end is larger than that of the small end, the large end is located above the small end, the large end is connected to the expansion portion 100, and the small end is connected to the expansion portion 100 or the solid portion 200. In the present embodiment, the small end is connected to the solid portion 200, but may be connected to the expansion portion 100 in other embodiments. Through above setting, utilize changeover portion 120, can utilize changeover portion 120 to make inflation portion 100 contract in pushing into cannulated screw solid bolt, be even make the head of solid bolt retract into cannulated screw's inside, it is more convenient to assemble. In this embodiment, the transition section 120 is tapered in shape, and in other embodiments, may be curved, etc.

Specifically, the lower portion of the solid portion 200 is provided with a guide section 210. The provision of the guide section 210 facilitates easier access of the solid portion 200 to the interior of the cannulated screw.

The main steps for filling the solid plug are as follows:

s01, determining the operation part and making an operation scheme according to the relevant image data of the preoperative X-ray, CT, MRI and the like of the patient;

s02, selecting a set of hollow screws with various specifications, a set of solid bolts with various specifications and matched orthopedic surgical instruments before operation according to an operation plan, wherein the orthopedic surgical instruments can comprise matched guide pins, depth finders, hollow orthopedic drill bits, nail feeders and the like;

s03, confirming the reduction effect of the broken end of the fracture through repeated perspective in the operation, determining the position and the angle of the implantation, determining the diameter specification of the implanted hollow screw, and implanting a matched guide pin;

s04, measuring the depth by adopting a matched depth finder, and determining the length specification of the embedded hollow screw;

s05, drilling holes by adopting a matched hollow orthopedic drill bit;

s06, placing a hollow screw into the bone block by using the screw feeder to pressurize the bone block;

s07, removing the matched guide pin, and placing a solid bolt, wherein the solid bolt is provided with an expansion part 100 which can contract and enter the interior of the hollow screw in the process of placing.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various changes and modifications without departing from the spirit of the invention.

Claims (6)

1. A solid bolt capable of enhancing strength of a hollow screw after being implanted comprises a solid bolt body and is characterized in that: the solid bolt body comprises an expansion part (100) and a solid part (200) which are connected with each other, the expansion part (100) is positioned above the solid part (200), the maximum outer diameter of the expansion part (100) of the solid bolt body in a free state is larger than that of the solid part (200), the expansion part (100) has elasticity, and the outer diameter of the expansion part (100) can be reduced.

2. The solid plug of claim 1, wherein the solid plug is adapted to increase the post-implantation strength of the cannulated screw by: the top surface of the expansion part (100) is provided with a slit (110), and the slit (110) traverses the solid plug body.

3. The solid plug of claim 2, wherein the solid plug is adapted to increase the post-implantation strength of the cannulated screw by: the number of the slots (110) is two, and the two slots (110) are perpendicular to each other.

4. The solid plug of claim 1, wherein the solid plug is adapted to increase the post-implantation strength of the cannulated screw by: be equipped with changeover portion (120) on the outer peripheral face of body is tied to the solid, changeover portion (120) are including main aspects and tip, the main aspects is located the top of tip, the external diameter of main aspects is greater than the external diameter of tip, the main aspects is connected on inflation portion (100), the tip is connected inflation portion (100) or on solid portion (200).

5. The solid plug of claim 4, wherein the solid plug is capable of increasing the strength of the cannulated screw after implantation, and wherein: the transition section (120) is tapered.

6. The solid plug of claim 1, wherein the solid plug is adapted to increase the post-implantation strength of the cannulated screw by: the lower part of the solid part (200) is provided with a guide section (210).

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