CN211534756U

CN211534756U - Bone plate screw and fixing assembly for bone repair

Info

Publication number: CN211534756U
Application number: CN201922167117.XU
Authority: CN
Inventors: 张晓金; 王吴建; 王军
Original assignee: Chengdu Meiyida Medical Technology Co ltd
Current assignee: Chengdu Meiyida Medical Technology Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-22
Anticipated expiration: 2029-12-05

Abstract

The utility model provides a bone plate screw and fixed subassembly for bone restoration, relates to the medical instrument field, and its bone plate screw includes screwhead and screw rod, and the screwhead is fixed to be set up the tip at the screw rod, bone plate screw still includes the portion of screwing, the portion of screwing is prismatic structure, the portion of screwing and screwhead fixed connection for drive bone plate screw rotates. The utility model discloses can provide great operating space, the installation of being convenient for mounting tool.

Description

Bone plate screw and fixing assembly for bone repair

Technical Field

The utility model relates to the field of medical equipment, in particular to bone plate screw and fixed subassembly for bone repair.

Background

In an orthopedic surgery, a fracture part of a patient is usually fixed by a bone plate, and the bone plate is fixedly connected to the fracture part of the patient by bone plate screws. The head of the existing bone plate screw is generally provided with a straight-line groove, a cross-shaped groove or a regular hexagonal prism cavity groove, and the bone plate screw can be installed by adopting an installation tool such as a screwdriver or an inner hexagonal wrench. The existing bone plate screw has the problems that a linear groove, a cross-shaped groove or a regular hexagonal prism cavity groove which is used for installing and screwing is arranged close to the bone of a patient on the screw head, the working contact surface of the screw head and an installing tool is lower, so that the installing tool can operate in a smaller space, and in an orthopedic operation, the installing tool easily accidentally injures muscle tissues and skin around the damaged bone of the patient, so that certain pain is caused to the patient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in view of the foregoing, there is provided a bone plate screw and fixation assembly for bone repair that provides a large operable space for an installation tool and facilitates installation.

The utility model adopts the technical scheme as follows:

the bone plate screw for bone repair comprises a screw head and a screw rod, wherein the screw head is fixedly arranged at the end part of the screw rod, the bone plate screw further comprises a screwing part, the screwing part is of a prismatic structure, and the screwing part is fixedly connected with the screw head and is used for driving the bone plate screw to rotate.

By adopting the structure, mounting tools such as a wrench sleeve can be clamped on the screwing part to drive the screwing part to rotate so as to screw the bone plate screw. The arrangement of the screwing part can raise the contact working surface of the bone plate screw and the mounting tool, avoid the damage of the tissue around the damaged bone of the patient caused by the mounting tool, increase the operable space of the mounting tool and facilitate the mounting of the bone plate screw. The screwing part is of a prismatic structure, so that the problem of slipping failure of the bone plate screw during installation is avoided, and the bone plate screw is convenient to install.

Furthermore, a twist-off conical groove is formed in the circumferential direction of the lower section of the screwing part.

In the structure, the lower section of the screwing part is provided with the twist-off conical groove, when the bone plate screw is screwed down, torque can be continuously applied to the screwing part, the screwing part is broken along the groove bottom of the twist-off conical groove, the broken section between the screwing part and the screw head is flat, the phenomenon that tissues around the bone body of a patient are stimulated by the pointed end on the surface of the screw head to cause lesion is avoided, and the effective healing of the fracture part of the patient is ensured.

Furthermore, a plurality of bar-shaped grooves are circumferentially arranged in the twist-off conical groove, and the bar-shaped grooves are arranged along the axial direction of the screwing part.

In the structure, the arrangement of the strip-shaped groove can facilitate the twist-off of the screwing part.

Furthermore, the screw head is provided with a mounting hole, one end of the screwing part is in threaded connection with the inside of the mounting hole, and the screwing direction of the screwing part is the same as that of the bone plate screw.

By adopting the structure, after the bone plate screw is screwed down, torque can be continuously applied to the screwing part to destroy the thread between the screwing part and the screw head, so that the threaded connection between the screwing part and the screw head is invalid, the screwing part is separated from the screw head, the screwing part is convenient to disassemble, the surface of the screw head can be ensured to be flat, the situation that the tissues around the damaged bone body of a patient are influenced due to the overhigh surface or the sharp head of the screw head is avoided, and the effective healing of the damaged bone body of the patient is ensured.

Furthermore, the outer edge of the screw head is provided with a notch which is matched with the supporting rod and used for limiting the reverse rotation of the bone plate screw.

By adopting the structure, when the screwing part is disassembled, the supporting rod can be firstly used for abutting against the notch, so that the reverse rotation of the bone plate screw is avoided, and the disassembly of the screwing part is convenient.

Further, the screw head is provided with a mounting hole which is a prismatic groove, and one end of the screwing part is matched and clamped inside the prismatic groove.

Due to the adoption of the structure, the screwing part can be conveniently detached.

The fixing component for bone repair comprises a bone plate, wherein the bone plate is provided with a plurality of through holes, and the bone plate screws for bone repair are detachably arranged in the through holes in a penetrating mode.

Furthermore, a counter bore is formed in one end of the through hole of the bone plate, and a screw head of the bone plate screw is clamped in the counter bore; the screw rod of the bone plate screw is in threaded connection with the through hole.

Due to the adoption of the structure and the arrangement of the counter bore, the height of the screw head protruding out of the bone fracture plate can be reduced as much as possible, the influence on the tissues around the damaged bone of the patient due to the overhigh screw head is avoided, and the effective healing of the damaged bone of the patient is ensured. The screw rod of the bone plate screw is in threaded connection with the through hole, so that the connection strength between the bone plate screw and the bone plate can be increased, the bone plate screw is prevented from being separated from the bone plate, and the bone plate can be stably and effectively fixed at the damaged bone of a patient under the action of the bone plate screw.

Furthermore, the through hole is obliquely arranged in the direction deviating from the thickness direction of the bone plate, and a screw rod of the fixing screw is obliquely arranged in the through hole in a matching manner; the screwing part is arranged along the thickness direction of the bone plate.

By adopting the structure, the through holes on the bone fracture plate can be obliquely arranged along different directions, a plurality of bone fracture screws penetrating through the through holes are obliquely arranged inside the bone of a patient along the non-passing direction, the fixing area of the bone fracture plate is increased, the fixing stress direction of the bone fracture plate is increased, the bone fracture plate is stably fixed on the bone of the patient, and meanwhile, the fixing component can be suitable for fixing special-shaped bone or bone with curvature on the surface. The screwing part is arranged along the thickness direction of the bone plate, so that the bone plate screw can be conveniently screwed.

Further, the angle between the central line of the through hole and the thickness direction of the bone plate is 5 degrees, 10 degrees or 15 degrees.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the bone plate screw comprises a screw head, a screw head and a screw head, wherein the screw head is fixedly provided with a screwing part which is of a prismatic structure and is matched with mounting tools such as a socket wrench and the like for driving the bone plate screw to rotate;

2. in the utility model, the screwing part is detachably connected with the screw head, so that the screwing part can be conveniently separated from the screw head of the bone plate screw, the situation that the surface of the screw head is too high or a pointed head exists to influence the tissues around the damaged bone of the patient is avoided, and the effective healing of the damaged bone of the patient is ensured;

3. the utility model discloses in, the skew bone plate thickness direction slope of through-hole sets up, and set screw's screw rod cooperation slope sets up inside the through-hole, can make bone plate screw slope set up inside patient diaphysis, can make fixed subassembly be applicable to the fixed of special dysmorphism diaphysis, can increase the fixed region of coaptation board, can also avoid bone plate screw to break away from patient diaphysis simultaneously, guarantees that bone plate screw will coaptation the stable solid of board on patient diaphysis.

Drawings

FIG. 1 is a schematic structural view of a bone plate screw of example 1;

FIG. 2 is a schematic structural view of a bone plate screw of example 2;

FIG. 3 is a schematic cross-sectional view of the bone plate screw of embodiment 2 set in a bone plate;

FIG. 4 is a schematic cross-sectional view of the fixing assembly according to embodiment 5;

the labels in the figure are: 1-bone plate, 11-through hole, 21-screw head, 211-mounting hole, 22-screw rod, 23-screwing part, 231-twist off conical groove, 232-strip groove, 3-patient bone body, A-bone plate thickness direction, b-included angle between through hole center line and bone plate thickness direction.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A bone plate screw for bone repair, as shown in figure 1, comprises a screw head 21, a screw rod 22 and a screwing part 23, wherein the screw head 21 is fixedly arranged at the end part of the screw rod 22, the screwing part 23 is in a prism structure, and the screwing part 23 is fixedly connected with the screw head 21 and is used for driving the bone plate screw to rotate. The lower section of the fastening portion 23 is circumferentially provided with a twist-off tapered groove 231. A plurality of bar-shaped grooves 232 are circumferentially arranged inside the twist-off conical groove 231, and the bar-shaped grooves 232 are arranged along the axial direction of the screwing part 23. When the bone plate screw is installed, the socket wrench is clamped on the screwing part 23, so that the bone plate screw arranged on the bone plate 1 is screwed into the bone body 3 of the patient, and the bone plate 1 is fixedly arranged at the damaged bone body of the patient. After the attachment is completed, the torque is continuously applied to the fastening portion 23, and the fastening portion 23 is broken along the groove bottom of the twist-off tapered groove 231, so that the fastening portion 23 is disengaged from the screw head 21.

Example 2

A bone plate screw for bone repair, as shown in figure 2, comprises a screw head 21, a screw rod 22 and a screwing part 23, wherein the screw head 21 is fixedly arranged at the end part of the screw rod 22, and the screwing part 23 is of a prism structure; as shown in fig. 2, the screw head 21 is provided with a mounting hole 211, one end of the fastening portion 23 is screwed into the mounting hole 211, and the fastening direction of the fastening portion 23 is the same as the fastening direction of the bone plate screw. The outer edge of the screw head 21 is provided with a notch which is matched with the supporting rod and used for limiting the reverse rotation of the bone plate screw. When the bone plate screw is installed, the socket wrench is clamped on the screwing part 23, so that the bone plate screw arranged on the bone plate 1 is screwed into the bone body 3 of the patient, and the bone plate 1 is fixedly arranged at the damaged bone body of the patient. After the screw head 21 is installed, torque can be continuously applied to the screwing part 23, threads between the screwing part 23 and the screw head 21 are damaged, threaded connection between the screwing part 23 and the screw head 21 is disabled, the screwing part 23 is separated from the screw head 21, the screwing part 23 is convenient to detach, the surface of the screw head 21 can be ensured to be flat, the situation that tissues around a patient bone body are affected due to overhigh surface or pointed tips of the screw head 21 is avoided, and effective healing of the patient bone body is ensured; alternatively, the post may be used to abut the gap in the screw head 21 to prevent the plate screw from rotating in the reverse direction, and the tightening portion 23 may be rotated in the reverse direction to disengage the tightening portion 23 from the screw head 21.

Example 3

The bone plate screw for bone repair comprises a screw head 21, a screw rod 22 and a screwing part 23, wherein the screw head 21 is fixedly arranged at the end part of the screw rod 22, the screwing part 23 is of a prism structure, a mounting hole 211 is formed in the screw head 21, the mounting hole 211 is a prism groove, and one end of the screwing part 23 is matched and clamped in the prism groove. When the bone plate screw is installed, the socket wrench is clamped on the screwing part 23, so that the bone plate screw arranged on the bone plate 1 is screwed into the bone body 3 of the patient, and the bone plate 1 is fixedly arranged at the damaged bone body of the patient. After the installation is finished, the screwing part 23 can be separated from the screw head 21 by directly taking the screwing part 23 out of the prismatic groove.

Example 4

A fixing component for bone repair is shown in fig. 3 and comprises a bone plate 1, wherein a plurality of through holes 11 are formed in the bone plate 1, and bone plate screws for bone repair in embodiment 2 are detachably arranged in the through holes 11 in a penetrating mode. Preferably, one end of the through hole 11 of the bone plate 1 is provided with a counter bore, and a screw head 21 of the bone plate screw is clamped in the counter bore; the screw rod 22 of the bone plate screw is in threaded connection with the through hole 11.

Example 5

A bone repair fixing assembly according to embodiment 5, which is different from embodiment 4 in that, as shown in fig. 4, the through holes 11 are provided obliquely with respect to the thickness direction of the bone plate 1 (the direction a in fig. 4 is the thickness direction of the bone plate 1), and in actual practice, the inclination angles of the through holes 11 may be set according to the curvature of the surface of the bone body on which the bone plate 1 is specifically applied; the screw rod 22 of the fixing screw is matched and obliquely arranged in the through hole 11; the screwing part 23 is arranged along the thickness direction of the bone plate 1. Preferably, as shown in fig. 4, the angle b between the center line of the through hole 11 and the thickness direction of the bone plate 1 is 5 ° or 10 ° or 15 °.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A bone plate screw for bone repair, comprising a screw head (21) and a threaded rod (22), the screw head (21) being fixedly arranged at the end of the threaded rod (22), characterized in that: the bone plate screw further comprises a screwing part (23), the screwing part (23) is of a prism structure, and the screwing part (23) is fixedly connected with the screw head (21) and is used for driving the bone plate screw to rotate.

2. A bone plate screw for bone repair as defined in claim 1, wherein: the lower section of the screwing part (23) is circumferentially provided with a twist-off conical groove (231).

3. A bone plate screw for bone repair as defined in claim 2, wherein: a plurality of bar-shaped grooves (232) are circumferentially arranged in the twist-off conical groove (231), and the bar-shaped grooves (232) are arranged along the axial direction of the screwing part (23).

4. A bone plate screw for bone repair as defined in claim 1, wherein: the screw head (21) is provided with a mounting hole (211), one end of the screwing part (23) is connected inside the mounting hole (211) in a threaded mode, and the screwing direction of the screwing part (23) is the same as that of the bone plate screw.

5. A bone plate screw for bone repair as defined in claim 4, wherein: the outer edge of the screw head (21) is provided with a notch which is matched with the supporting rod and used for limiting the reverse rotation of the bone plate screw.

6. A bone plate screw for bone repair as defined in claim 1, wherein: be equipped with mounting hole (211) on screwhead (21), mounting hole (211) are prismatic recess, the portion of screwing (23) one end cooperation joint is inside prismatic recess.

7. A bone repair fixation assembly, comprising: the bone plate screw comprises a bone plate (1), wherein a plurality of through holes (11) are formed in the bone plate (1), and the bone plate screw for repairing bones as claimed in any one of claims 1 to 6 is detachably arranged in the through holes (11) in a penetrating manner.

8. A fixation assembly for bone repair as claimed in claim 7, wherein: one end of the through hole (11) of the bone plate (1) is provided with a counter bore, and a screw head (21) of the bone plate screw is clamped in the counter bore; the screw rod (22) of the bone plate screw is in threaded connection with the through hole (11).

9. A fixation assembly for bone repair as claimed in claim 8, wherein: the through hole (11) is obliquely arranged in a way of deviating from the thickness direction of the bone plate (1), and a screw rod (22) of a bone plate screw is obliquely arranged in the through hole (11) in a matching way; the screwing part (23) is arranged along the thickness direction of the bone fracture plate (1).

10. A fixation assembly for bone repair as claimed in claim 9, wherein: the angle between the central line of the through hole (11) and the thickness direction of the bone fracture plate (1) is 5 degrees, 10 degrees or 15 degrees.