阅读说明：本技术 一种万向空心锁定螺钉 (Universal hollow locking screw ) 是由 陈文涛 朱益清 潘辉 于 2021-10-15 设计创作，主要内容包括：本发明涉及一种万向空心锁定螺钉,包括螺钉头部,以及与所述螺钉头部为一体的螺钉杆部,所述螺钉头部为半球头结构,其球面上设置有螺纹,所述螺钉头部的球面上设置有至少一个用于截断所述螺纹的万向槽；所述螺钉杆部的外表面设置有螺纹,其内部设置位于其轴向方向的中心通孔。本发明能够实现锁定螺钉在钉孔轴线周围的万向锁定,适用于不同情况的骨折固定,保证治疗效果。(The invention relates to a universal hollow locking screw, which comprises a screw head part and a screw rod part integrated with the screw head part, wherein the screw head part is of a hemispherical head structure, a thread is arranged on the spherical surface of the screw head part, and at least one universal groove for cutting off the thread is arranged on the spherical surface of the screw head part; the outer surface of the screw rod part is provided with threads, and a central through hole positioned in the axial direction of the screw rod part is formed in the screw rod part. The invention can realize the universal locking of the locking screw around the axis of the nail hole, is suitable for the fracture fixation under different conditions and ensures the treatment effect.)

1. The universal hollow locking screw is characterized by comprising a screw head (1) and a screw rod part (2) integrated with the screw head (1),

the screw head (1) is of a hemispherical head structure, the spherical surface of the screw head is provided with threads, and the spherical surface of the screw head (1) is provided with at least one universal groove (3) for cutting off the threads;

the outer surface of the screw rod part (2) is provided with threads, and a central through hole (4) located in the axial direction of the screw rod part is formed in the screw rod part.

2. Universal hollow locking screw according to claim 1, characterized in that the length direction of the universal slot (3) is parallel to the axial direction of the screw shank (2).

3. Universal hollow locking screw according to claim 1, characterized in that the universal slot (3) is a right angle slot or a circular arc slot.

4. The universal cannulated locking screw according to claim 1, wherein the thread of the screw head (1) is a double thread.

5. The universal cannulated locking screw according to claim 1, characterized in that the screw shank (2) is provided with a bone cement hole (7) communicating with the central through hole (4).

6. Universal cannulated locking screw according to claim 1, characterized in that the tail end of the screw shank (2) is provided with a self-tapping groove (5).

7. The gimbaled cannulated locking screw of claim 1, wherein the screw thread of the screw shank (2) is a half-thread.

8. Universal cannulated locking screw according to claim 7, characterized in that the screw shank (2) is provided with a reverse self-tapping groove (6) in its thread.

9. The gimbaled cannulated locking screw of claim 1, wherein the screw thread of the screw shank (2) is full thread.

Technical Field

The invention belongs to the technical field of orthopedic medical instruments, and particularly relates to a universal hollow locking screw.

Background

The locking screw used clinically at present is used with the locking bone fracture plate, namely the screw thread on the head of the locking screw is engaged with the screw thread of the locking hole on the bone fracture plate, thus realizing the locking of the screw and the plate; however, this structure has limitations, i.e. the relative position of the locked nail and plate is set when designing the nail and plate, so that the surgeon cannot make corresponding adjustments according to the specific conditions in the operation, cannot ensure the fixation effect on the fracture position, and has poor versatility.

Disclosure of Invention

The invention aims to provide a universal hollow locking screw to solve the problem of poor universality of the locking screw.

The universal hollow locking screw is realized by the following steps:

a universal hollow locking screw comprises a screw head part and a screw rod part integrated with the screw head part,

the screw head is of a hemispherical head structure, the spherical surface of the screw head is provided with threads, and the spherical surface of the screw head is provided with at least one universal groove for cutting off the threads;

the outer surface of the screw rod part is provided with threads, and a central through hole positioned in the axial direction of the screw rod part is formed in the screw rod part.

Further, the length direction of the universal slot is parallel to the axial direction of the screw rod part.

Furthermore, the universal groove is a right-angle groove or an arc groove.

Further, the screw thread of the screw head is a double-thread screw thread.

Furthermore, the screw rod part is provided with a bone cement hole communicated with the central through hole.

Furthermore, the tail end of the screw rod part is provided with a self-tapping groove.

Further optionally, the screw thread of the screw shank is a half thread.

Furthermore, a reverse self-tapping groove is formed in the thread of the screw rod portion.

Further optionally, the screw thread of the screw shank is a full thread.

After the technical scheme is adopted, the invention has the beneficial effects that:

according to the invention, the universal groove for cutting off the threads is arranged at the head of the screw, so that the threads at the head of the screw can be connected with the internal threads in the nail hole in a staggered manner, the universal locking of the locking screw around the axis of the nail hole is realized, the universal locking screw is suitable for fixing the fracture under different conditions, and the treatment effect is ensured.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a structural view of a universal hollow locking screw according to embodiment 1 of the present invention;

FIG. 2 is a structural view of a universal hollow locking screw according to embodiment 2 of the present invention;

FIG. 3 is a view showing one of the states of use of the locking screw of the universal hollow according to embodiment 2 of the present invention;

in the figure: the bone fracture plate comprises a screw head part 1, a screw rod part 2, a universal groove 3, a central through hole 4, a self-tapping groove 5, a reverse self-tapping groove 6, a bone cement hole 7, a bone fracture plate 8 and a locking hole 9.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1

As shown in fig. 1, the universal hollow locking screw comprises a screw head 1 and a screw rod part 2 integrated with the screw head 1, wherein the screw head 1 is of a hemispherical head structure, a thread is arranged on the spherical surface of the screw head 1, and at least one universal groove 3 for cutting off the thread is arranged on the spherical surface of the screw head 1; the outer surface of the screw rod part 2 is provided with threads, and the inside of the screw rod part is provided with a central through hole 4 positioned in the axial direction.

In order to position the locking screw conveniently, a screwdriver groove (not shown in the figure) communicated with the central through hole 4 is arranged on the screw head part 1, and the positioning is conveniently carried out by using a kirschner wire during the operation.

The screwdriver groove can be matched with a screwdriver, so that the locking screw can be conveniently screwed in.

In order to ensure the cutting of the screw thread of the screw head part 1 and realize the staggered connection with the internal thread of the locking hole 9 on the bone fracture plate 8, the length direction of the universal groove 3 is parallel to the axial direction of the screw rod part 2.

The universal groove 3 is a right-angle groove.

In this embodiment, the gimbal slot 3 is provided with four right angle slots.

Since the threads in the locking hole 9 of the bone plate 8 are generally double threads, the threads of the screw head 1 are double threads in order to be able to cooperate with the threads in the locking hole 9.

Under the same thread pitch, the matching of the double-thread is firmer and more stable.

In order to facilitate the screwing-in of the locking screw, the screw shank 2 is provided at its rear end with a self-tapping groove 5.

In order to ensure the compression of the fracture line and thus to improve the fixation of the fracture, the screw thread of the screw shank 2 is half-threaded.

Preferably, the screw thread of the screw shank 2 is of a single thread construction.

In order to facilitate the self-tapping and unscrewing during the removal of the locking screw, the screw thread of the screw shank 2 is provided with a reverse self-tapping groove 6.

Preferably, the angle of deflection α of the locking screw is within ± 15 ° of the axial deflection of the locking hole 9 of the bone plate 8, i.e. the locking screw can be locked at any angle of deflection within an axial ± 15 ° taper of the locking hole 9.

In the operation process, according to the fracture condition, a kirschner wire is firstly driven to determine the direction of a nail path, the direction deflects along the axial direction of a locking hole 9 of the bone plate 8 by any angle within the range of +/-15 degrees, and then a locking screw is screwed in along the direction of the kirschner wire and is locked by a screwdriver.

Example 2

As shown in fig. 2-3, this embodiment provides a universal hollow locking screw based on embodiment 1, which has a structure substantially the same as that of the locking screw of embodiment 1, except that,

the universal groove 3 is an arc groove.

In this embodiment, the screw head 1 is provided with four arc grooves.

In order to be able to ensure fracture fixation for osteoporotic patients, the screw shank 2 is provided with a cement hole 7 communicating with the central through hole 4.

Specifically, after the locking screw is screwed into the fracture site, bone cement can be driven into the bone through the screwdriver groove, the central through hole 4 and the bone cement hole 7, so that the holding force of the locking screw in the bone is increased.

The screw thread of the screw rod part 2 is full thread.

The fully threaded screw shank 2 is not provided with a reverse self-tapping groove 6.

The universal hollow locking screw solves the problem that the common locking screw cannot realize the universal locking function, can realize the arbitrary deflection angle locking within the range of +/-15 degrees with the axis of the locking hole 9 of the bone fracture plate 8 along the direction of the guide kirschner wire, ensures the effect of fixing the fracture of a patient, and has good universality.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.