CN211066974U

CN211066974U - Stable tension lock nail for femoral neck fracture angle

Info

Publication number: CN211066974U
Application number: CN201921998001.4U
Authority: CN
Inventors: 潘静心; 潘治军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-07-24
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a stable tension lock nail for femoral neck fracture angle, the whole shape of which is that the outer diameter of both ends is larger than that of the middle section, wherein the top end of the nail body is provided with a fixed thread, the tail part of the nail body is locked with a main nail, the tail end of the nail is provided with a nail cap, and the end surface of the nail cap is provided with a hexagonal screwing structure; if the locking degree of the tension lock nail is not enough, the other small nail body can be screwed into the opening groove arranged at the tail part of the tension lock nail, so that the tail part of the tension lock nail is thickened by 0.1mm after being expanded, the locking effect of the tension lock nail and the main nail is further enhanced, and the femoral neck fracture is stably fixed at an angle. The utility model discloses rational in infrastructure, mechanical properties is good, both can implement disconnected end pressurization, can realize the fixed angle stability behind the femoral neck fracture again, and big tuberosity summit advances the nail, keeps away from the broken string, does not disturb fracture end blood supply, and the shear force that causes when can resisting early exercise completely moves in for extramedullary locking system fulcrum, has significantly reduced the length of the shear force arm of force, has still remain the nail effect that moves back when necessary simultaneously.

Description

Stable tension lock nail for femoral neck fracture angle

Technical Field

The utility model belongs to the technical field of medical equipment, concretely relates to stable form pulling force staple of thighbone neck fracture angle.

Background

With the aging of society, the incidence of osteoporosis and femoral neck fractures caused by osteoporosis gradually increases, and once the femoral neck fractures, because most of a femoral head blood supply system is damaged, the mechanical length for fixation is short, the relative shearing force is large, the fixation is difficult to be effective, and nonunion and femoral head necrosis are easy to occur. At present, the most used internal fixation devices for clinically treating femoral neck fracture are three hollow threaded nails, proximal femoral locking steel plates, reconstruction nails and the like. The three hollow threaded nails have the advantages that the nail body is thinner, the damaged blood supply is less, the occupied squat growing space is less, the damage to the femoral neck is less, the broken end pressurization can be well implemented, and the healing is facilitated; the nail body is fixed with the femoral neck through the greater tuberosity, the greater tuberosity is spongy bone, the femoral neck is mainly provided with loose bone, the holding force of the loose bone on the screw is small, the nail body is easy to shift in the area of the loose bone, so that the fracture of the femoral neck is integrally fixed without angular stability, once the nail body has angular stability and instability, the phenomenon of loose shift occurs, the broken end grows slowly, and even bone nonunion or femoral head necrosis can be caused.

Disclosure of Invention

The utility model aims at solving the problems and providing a femoral neck fracture angle stabilizer

The pull locking nail is characterized in that the overall shape of the pull locking nail is that the outer diameters of two ends are larger than that of the middle section, wherein the top of the nail body is provided with a fixed thread, the tail end of the nail body is provided with a nail cap, and the end face of the nail cap is provided with a concave hexagonal screwing groove, so that the pull locking nail can be screwed conveniently by an inner hexagonal screwing device; the tail part of the tension lock nail is locked with the main nail to generate an angle stabilizing effect.

Furthermore, a vertical semicircular open slot can be formed in the center of the tail of the tension lock nail, internal threads are formed in the inner wall of the semicircular open slot, another small nail body can be screwed into the threads as necessary, the diameter of the small nail body is larger than the inner diameter of the open slot by 0.1mm, the tail of the small nail body screwed into the tension lock nail is enlarged by 0.1mm after being expanded, the locking effect of the tension lock nail and the main nail is further enhanced, and the femoral neck fracture is stably fixed.

Furthermore, the nail cap can also be provided with two semicircular shapes with a middle opening, and the nail tail lifted out of the nail cap is also provided with a middle opening and is in a hexagonal shape, so that an outer hexagonal sleeve can be conveniently screwed into the tension lock nail.

The beneficial effects of the utility model are that rational in infrastructure, mechanical properties is good, both can implement disconnected end pressurization, can realize the fixed angle stability behind the femoral neck fracture again, the nail is advanced on the macrostoma summit, keep away from the broken bone line, do not disturb fracture end blood supply, can resist the shear force that causes when early function takes exercise completely, for extramedullary locking system fulcrum antedisplacement, the length of the shear force arm of force that has significantly reduced, prevent fatigue, still remain the nail effect of moving back when necessary simultaneously, horizontal pulling force nail tension area pulling force is fixed, strengthen anti rotation stability.

Drawings

Fig. 1 is the overall structure schematic diagram of the first tension lock pin of the present invention.

Fig. 2 is the overall structure schematic diagram of the second tension lock pin of the present invention.

Fig. 3 is a schematic sectional view of the second tension lock pin of the present invention.

Fig. 4 is a schematic view of a partial section of the second tension lock pin of the present invention.

Fig. 5 is a top view of the second tension lock pin of the present invention.

Fig. 6 is a schematic view of the usage state of the present invention.

In the figure, 1, an aimer A2, a fixing knob 3, an aimer B4, a tension lock nail guide hole 5, a sleeve 6, a femoral shaft 7, a main nail 701, a main nail guide hole 8, a femoral neck 9, a tension lock nail 901, a fixing thread 902, a nail cap 903, a nail tail 904, an open slot 10 and a femoral head.

Detailed Description

For the understanding of those skilled in the art, the following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings.

Example 1

Under perspective, firstly, the fracture part of the femoral neck 8 is reset, then the sighting device A1 is connected with the sighting device B3 through the fixing knob 2, the main nail 7 is driven into the femoral neck 6 through the vertex of the greater tuberosity, then two tension lock nails 9 arranged in the sleeve 5 are driven into the femoral head 10 through the tension lock nail guide hole 4, one end of each tension lock nail is pressurized with the fracture end through the fixing thread 901, the femoral neck 8 and the main nail 7 are locked and fixed through the nail cap at the other end, then the sleeve 5 is taken out from the tail part of the tension lock nail, and the sighting device A1 and the sighting device B3 are removed simultaneously, so that the whole using process can be completed.

Example 2

Under perspective, firstly, the fracture part of the femoral neck 8 is reset, then a sighting device A1 is connected with a sighting device B3 through a fixing knob 2, a main nail 7 is driven into the femoral neck 6 through the vertex of the greater tuberosity, two tension lock nails 9 arranged in a sleeve 5 are driven into a femoral head 10 through a tension lock nail guide hole 4, one end of each tension lock nail is pressurized with the fracture end through a fixing thread 901, and the femoral neck 8 and the main nail 7 are locked and fixed through a nail cap 902 at the other end of each tension lock nail; if the locking degree of the tension lock nail 9 is not enough, another small nail body can be screwed in through an open slot 904 arranged on the upper portion of the tension lock nail, the diameter of the small nail body is larger than the inner diameter of the open slot by 0.1mm, so that the small nail body is screwed in the tail portion of the tension lock nail and expands to be thickened by 0.1mm, at the moment, the tension lock nail 9 enters the femoral head 10 through a reset femoral neck 8, then the nail tail 903 is screwed by using an outer hexagonal sleeve, the femoral neck fracture is stably fixed, then the sleeve 5 is taken out from the tail portion of the tension lock nail, and the whole using process can be completed by taking off the sighting device A1 and the sighting device B3.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby; all the simple equivalent changes and modifications made according to the claims and the contents of the creation specification of the present invention should still fall within the scope covered by the present invention.

Claims

1. The utility model provides a stable form pulling force lock nail of thighbone neck fracture angle which characterized in that: the overall shape of the tension lock nail 9 is that the outer diameters of two ends are larger than that of the middle section, wherein the top of the nail body is provided with a fixed thread 901, the tail end of the nail body is provided with a nail cap 902, and the end surface of the nail cap 902 is provided with a concave hexagonal screwing groove, so that the tension lock nail 9 can be screwed conveniently by an inner hexagonal screwing device; the tail part of the tension lock pin 9 is locked with the main pin 7 to generate an angle stabilizing effect.

2. The femoral neck fracture angle-stabilized tension lock nail of claim 1, wherein: the central position of the tail part of the tension lock nail 9 can be also provided with a vertical semicircular open slot 904, the inner wall of the semicircular open slot 904 is provided with internal threads, another small nail body is screwed in the threads as necessary, the diameter of the small nail body is 0.1mm larger than the inner diameter of the open slot 904, the small nail body is screwed in the tail part of the tension lock nail and is thickened by 0.1mm after being expanded, the locking effect of the tension lock nail 9 and the main nail 7 is further enhanced, and the fracture of the femoral neck 8 is stably fixed.

3. The femoral neck fracture angle-stabilized tension lock nail of claim 1, wherein: the nail cap 902 can also be provided with a semicircular shape with an opening in the middle, and the nail tail 903 lifted out of the nail cap 902 is also provided with an opening in the middle and is hexagonal, so that an outer hexagonal sleeve can be conveniently screwed into the tension lock nail 9.