CN215994208U

CN215994208U - Fracture fixing device

Info

Publication number: CN215994208U
Application number: CN202121389292.4U
Authority: CN
Inventors: 王林; 李永杰; 王博; 樊垒; 刘丽亚; 王超
Original assignee: First Affiliated Hospital of Wannan Medical College
Current assignee: First Affiliated Hospital of Wannan Medical College
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-03-11
Anticipated expiration: 2031-06-22

Abstract

The utility model provides a fracture fixing device, which comprises a bone plate, screws and blocking nails, wherein the bone plate is provided with screw fixing holes and blocking nail fixing holes, and the screw fixing holes are communicated with the blocking nail fixing holes; the screw comprises a screw cap and a screw rod, and the side edge of the screw cap is provided with a notch; when the screw is matched with the bone plate, the screw cap is positioned in the screw fixing hole, the opening and the blocking screw fixing hole are encircled to form a combined hole, and the blocking screw is fixed in the combined hole. The fracture fixation device can effectively prevent the screw from rotating and withdrawing from the bone plate; the structure design is simple, and the processing and the operation are convenient; meanwhile, when the screw and the blocking nail are not in threaded connection, bone growth is facilitated.

Description

Fracture fixing device

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a fracture fixing device.

Background

At present, in fracture class operation, the conservative treatment is selected to the conventionality, steel sheet internal fixation, modes such as support external fixation, nevertheless in the aspect of preventing that the screw rotation from deviating from, there is certain drawback in current structure, the risk can not effectually be deviate from to the solution screw, in fracture patient's recovered motion in-process, the hone lamella passes through two broken ends about the screw fixation at the fracture, power can pass through on the screw transmits the hone lamella, there is a torsion (similar lever power) at the fixed part of screw and hone lamella contact, long-time repetitive action, screw and hone lamella can exist not hard up each other, take place that the screw becomes flexible to deviate from, serious screw fracture or hone lamella fracture condition, withdraw the nail for solving the screw looseness, need provide a fracture fixing device urgently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fracture fixing device, aiming at solving the problem that a screw is easy to loosen and fall out after being matched with a bone plate in the prior art, and the fracture fixing device can prevent the screw from loosening and falling off the screw and can prevent the screw from rotating after being implanted.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a fracture fixation device comprises a bone plate, screws and blocking nails, wherein the bone plate is provided with screw fixation holes and blocking nail fixation holes, and the screw fixation holes are communicated with the blocking nail fixation holes;

the screw comprises a screw cap and a screw rod, and the side edge of the screw cap is provided with a notch;

when the screw is matched with the bone plate, the screw cap is positioned in the screw fixing hole, the opening and the blocking screw fixing hole are encircled to form a combined hole, and the blocking screw is fixed in the combined hole.

Further, the blocking nail is in threaded fit with the combination hole.

Further, the blocking nail is in non-threaded fit with the combination hole.

Further, the blocking nail is in threaded fit with the blocking nail fixing hole and is in non-threaded fit with the notch.

Further, the blocking nail comprises a nail head and a nail body, and the size of the nail head is larger than or equal to that of the combination hole.

Further, the shape of the combination hole is a conical structure or a spherical structure.

Further, the size of the blocking nail fixing hole is smaller than that of the screw fixing hole.

Further, the size of the gap is smaller than that of the blocking nail fixing hole.

Further, the stop pin fixation holes may or may not extend through the bone plate.

Furthermore, a plurality of blocking nail fixing holes communicated with the screw fixing holes are arranged around the screw fixing holes, a plurality of notches are arranged on the side edge of the nail cap, when the screw is matched with the bone plate, the nail cap is positioned in the screw fixing holes, and each notch and each blocking nail fixing hole are arranged to form a combined hole.

The utility model has the following beneficial effects for the prior art:

the fracture fixation device provided by the utility model has the advantages that the screw fixation hole and the blocking screw fixation hole are processed on the bone plate, the screw cap is provided with the notch, the notch and the blocking screw fixation hole form the combined hole in a surrounding manner, the blocking screw is fixed in the combined hole, the positions of the screw and the blocking screw can be limited, the screw is prevented from rotating and loosening, and the screw is prevented from being separated from the bone plate.

According to the fracture fixing device provided by the utility model, a certain micromotion amount exists after the screw is matched with the blocking nail, so that the bone growth is facilitated.

The fracture fixation device provided by the utility model is simple in structural design and convenient to process and operate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a fracture fixation device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a bone plate according to one embodiment of the present invention;

FIG. 3 is a schematic view of a tapered screw mounting hole configuration according to one embodiment of the present invention;

FIG. 4 is a schematic view of a ball screw retaining hole according to an embodiment of the present invention;

FIG. 5 is a schematic view of the installation of the locking screw;

FIG. 6 is a schematic view of the installation of a non-locking screw;

FIG. 7 is a schematic view of a locking screw;

FIG. 8 is a schematic view of a non-locking screw configuration;

FIG. 9 is a top view of the locking screw

FIG. 10 is a top view of a non-locking screw;

FIG. 11 is a front view of a barrier pin;

FIG. 12 is a cross-sectional view of a barrier pin;

fig. 13 is a top view of a barrier pin.

In the figure: 1-bone plate; 2-a screw; 21-nail cap; 22-nail rod; 3-blocking the nail; 31-nail head; 32-a nail body; 4-screw fixing holes; 5-blocking the nail fixing hole; 6-locking screw; 7-non-locking screws; 8-a gap.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment is described in connection with fig. 1-13, which is a fracture fixation device comprising a bone plate 1, screws 2 and blocking nails 3.

The bone plate 1 may be any type or curved bone plate 1, and a plurality of spaced screw fixing holes 4 and a plurality of blocking screw fixing holes 5 are formed in the bone plate 1, each blocking screw fixing hole 5 is communicated with one screw fixing hole 4, the screw fixing holes 4 can be matched with locking screws 6 or non-locking screws 6, the shape of the screw fixing holes 4 can be preferably a conical structure (generally matched with the locking screws 6) or a spherical structure (generally matched with the non-locking screws 6), and internal threads are formed in the screw fixing holes 4 with the conical structure.

The screw 2 includes the head of a nail 21 and the nail pole 22, the head of a nail 21 lateral margin is provided with opening 8, when the cooperation of screw 2 and hone lamella 1 is accomplished (the nail pole 22 of screw 2 passes screw fixation hole 4 and bone fixation), this opening 8 with block 5 combination holes that enclose of nail fixation hole, block that nail 3 is fixed in the combination hole, with the screw 2 in the further fixed screw fixation hole 4, prevent that screw 2 is rotatory and not hard up, and then prevent that screw 2 from withdrawing from hone lamella 1, because the setting of opening 8, block and can prevent that screw 2 is rotatory after nail 3 implants, further strengthened and blockking the locking effect of nail 3 to screw 2.

The screw 2 can be a locking screw 6 or a non-locking screw 7, generally, the nut 21 of the locking screw 6 is conical, and the nut 21 of the non-locking screw 7 is spherical; the nut cap 21 of the locking screw 6 is provided with an external thread, and the locking screw 6 is connected with the conical screw fixing hole 4 through the thread; the screw cap 21 of the non-locking screw 7 is a spherical cap, the surface of the non-locking screw is not provided with threads, and the non-locking screw is matched with the spherical screw fixing hole 4; the upper end surface of the nail cap 21 is provided with a flower groove for matching with an instrument when a screw is installed.

The blocking nail 3 comprises a nail head 31 and a nail body 32, and in order to further improve the anti-backing effect of the blocking nail 3 on the screw 2, the size of the nail head 31 is larger than or equal to that of the combination hole, so that the nail head 31 of the blocking nail 3 can be pressed on the nail cap 21 after the blocking nail 3 is matched with the combination hole. To ensure the strength of the bone plate 1, the size of the blocking screw fixation holes 5 is smaller than the size of the screw fixation holes 4, and in addition, when the bone plate 1 is thicker, the blocking screw fixation holes 5 may extend through the bone plate 1 (as shown in fig. 5 and 6) or not extend through the bone plate 1 (when the bone plate 1 is thinner, the blocking screw fixation holes 5 extend through the bone plate 1); in order to ensure the strength of the head 31 of the blocking nail 3 and the convenience of matching the screw 2 with an instrument, the size of the gap 8 is smaller than that of the blocking nail fixing hole 5.

Screw 2 with block nail 3 when installation looks adaptation, block in the nail 3 is fixed in the combined hole, it has multiple cooperation form to block nail 3 and combined hole, if screw-thread fit (combined hole is generally the toper shape this moment, it is provided with the screw thread to block the surface), non-screw-thread fit (combined hole is generally the spherical shape this moment, it is smooth surface to block 3 surfaces of nail, the combined hole can set up to the toper hole this moment, it is the toper nail to block nail 3) or block nail 3 and block 5 screw-thread fits of nail fixed orifices and with opening 8 non-thread fit (combined hole can be the toper shape this moment, it is provided with half screw thread to block 3 surfaces of nail), all can reach the effect of locking the locking of preventing soon. When the blocking nail 3 is in non-thread fit or partial thread fit with the combined hole, the gap between the blocking nail 3 and the non-locking screw 7 is the smallest, but a certain micro-motion still exists, and the certain micro-motion between the screw 2 and the bone is more beneficial to bone growth and healing; the blocking nail 3 is of a conical solid structure, and a flower groove for clamping, screwing and withdrawing is processed at the upper end of the blocking nail 3.

In order to further strengthen the anti-loose and anti-rotation functions of the fracture fixation device, a plurality of blocking nail fixation holes 5 are arranged around the screw fixation hole 4 of the fracture fixation device, such as 2, 3 or 4, and the like, a plurality of gaps 8 are arranged on the lateral edge of the nail cap 21, such as 1, 3 or 4, and the like, and each gap 8 and the blocking nail fixation hole 5 form a combined hole.

The use method of the fracture fixation device comprises the following steps:

(1) implanting the bone plate 1 in a body;

(2) the screw rod 22 of the screw 2 passes through the screw fixing hole 4 to be fixed with the bone, at the moment, the screw cap 21 is positioned in the screw fixing hole 4, and the notch 8 and the blocking screw fixing hole 5 form a combined hole in a surrounding mode;

(3) the blocking nail 3 is implanted into the combination hole and fixed with the combination hole.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The fracture fixing device is characterized by comprising a bone plate, screws and blocking nails, wherein the bone plate is provided with screw fixing holes and blocking nail fixing holes, and the screw fixing holes are communicated with the blocking nail fixing holes;

2. The fracture fixation device of claim 1, wherein the blocking pin is threadedly engaged with the combination hole.

3. The fracture fixation device of claim 1, wherein the blocking pin is non-threadedly engaged with the combination hole.

4. The fracture fixation device of claim 1, wherein the blocking pin is threadedly engaged with the blocking pin fixation hole and non-threadedly engaged with the notch.

5. The fracture fixation device of claim 1, wherein the blocking nail comprises a head and a shank, the head having a size greater than or equal to the size of the combination hole.

6. The fracture fixation device of claim 1, wherein the combination hole has a shape of a conical structure or a spherical structure.

7. The fracture fixation device of claim 1, wherein the size of the blocking nail fixation hole is smaller than the size of the screw fixation hole.

8. The fracture fixation device of claim 1, wherein the size of the gap is smaller than the size of the stop nail fixation hole.

9. The fracture fixation device of claim 1, wherein the blocking nail fixation holes extend through the bone plate or not.

10. The fracture fixation device of claim 1, wherein a plurality of blocking nail fixation holes are formed around the screw fixation hole, a plurality of slits are formed on a side edge of the nail cap, the nail cap is positioned in the screw fixation hole when the screw is completely matched with the bone plate, and each slit and each blocking nail fixation hole form a combined hole.