CN110786922A

CN110786922A - Novel anchoring nail

Info

Publication number: CN110786922A
Application number: CN201911096813.4A
Authority: CN
Inventors: 杨驰; 陈敏洁; 张善勇; 白果; 郑吉驷
Original assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Current assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-02-14

Abstract

The invention discloses a novel anchoring nail which comprises a nail body, a stop dog, a connecting column, a top buckle, a self-tapping tip end and a threaded cutting edge, wherein the stop dog is arranged at the upper part of the nail body, and the top buckle is fixedly connected to the upper part of the nail body through the connecting column. According to the novel anchoring nail, the nail body, the threads, the stop blocks, the connecting column, the top buckle, the self-tapping tip and the thread cutting edge are matched with each other, so that the novel anchoring nail is realized, the design of the overflow groove is added in the thread area, the top end of the screw is sharper, the self-tapping pressure is increased, and the anchoring nail is easier to drill through cortex lycii; meanwhile, the overflow groove can discharge bone fragments from the overflow groove, so that the bone fragments cannot be accumulated in bones to increase infection risks, and the difficulty of drilling the anchoring nail is reduced; thinner screwdriver buckle district of design satisfies the screwdriver and can stably block the anchor nail and carry out the self tapping when, reduces its volume that exposes outside the bone, reduces the uncomfortable sense that muscle friction caused the patient.

Description

Novel anchoring nail

Technical Field

The invention relates to the technical field of medical anchoring nails, in particular to a novel anchoring nail.

Background

Medical anchor refers to an anchor for medical use, such as application No.: CN200820156083.3 discloses a medical anchor nail, contains nut and screw rod, the nut links to each other with the screw rod, is provided with the screw thread on the screw rod, a recess has been seted up to its center along its periphery on the nut, the recess is circular-arc, and circular arc juts to the nut center. This medical anchor nail can fix the anchor line in the recess between nut and the screw thread, make the difficult anchor line that cuts off among the operation process, ensure going on smoothly of operation, but above-mentioned case does not have the overflow groove, cause the relative round blunt in top like this, the self tapping is inconvenient to use, and the bone bits does not get rid of the passageway, it increases the infection risk to be extruded in the bone, further cause the self tapping degree of difficulty to increase simultaneously, and current design is that the screwdriver implants the condyle through interior buckle with the self tapping of anchor nail after fixed, but this fixed region design is comparatively generous, there is the great part to expose the bone face after the anchor nail is implanted, the easy friction soft tissue causes patient's postoperative discomfort.

Disclosure of Invention

The present invention provides a new type of anchor nail to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a novel anchor nail, includes nail body, backstop, spliced pole, top knot, self tapping point end and screw thread blade, the upper portion of nail body is provided with the backstop, the top of backstop is provided with the spliced pole, spliced pole fixedly connected with top knot is passed through on the upper portion of nail body, the below of nail body is provided with the self tapping point end, the screw thread blade has been seted up with the intersection of nail body to the self tapping point end.

Preferably, the surface of the nail body is provided with threads.

Preferably, the clearance between the threads is 0.8mm and the height is 0.35 mm.

Preferably, a 0.1mm round angle is arranged between the bottom (the back stress side) on the left side of the thread and the nail body, and a 0.3mm round angle is arranged between the bottom (the head-on stress side) on the right side of the thread and the nail body.

Preferably, the stop is a regular hexagon, and the vertex angle of the regular hexagon is provided with a chamfer of 0.2 mm.

Preferably, the left side and the right side of the connecting column and the positions corresponding to the top buckle and the stop block are provided with 0.2mm inner fillets.

Preferably, the top buckle is a regular hexagon, and the vertex angle of the regular hexagon is provided with a fillet of 0.3 mm.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the novel anchoring nail, the nail body, the threads, the stop blocks, the connecting column, the top buckle, the self-tapping tip and the thread cutting edge are matched with each other, so that the novel anchoring nail is realized, the design of the overflow groove is added in the thread area, the top end of the screw is sharper, the self-tapping pressure is increased, and the anchoring nail is easier to drill through cortex lycii; meanwhile, the overflow groove can discharge bone fragments from the overflow groove, so that the bone fragments cannot be accumulated in bones to increase infection risks, and the difficulty of drilling the anchoring nail is reduced; thinner screwdriver buckle district of design satisfies the screwdriver and can stably block the anchor nail and carry out the self tapping when, reduces its volume that exposes outside the bone, reduces the uncomfortable sense that muscle friction caused the patient.

2. The arc design of the top buckle is designed to match the angle of the bayonet of the screwdriver, so that the top buckle can have certain buckling firmness and can be separated from the screwdriver after self-tapping is finished, the arc design of the connecting column is designed to prevent suture from being broken due to friction when the suture is knotted, the arc design of the stop is designed to avoid scratching soft tissue because the stop directly contacts with the soft tissue and bone, and rounding treatment is needed to avoid scratching the soft tissue, and the angle design of the self-tapping tip is designed to obtain enough pressure so that the self-tapping can enter into the condyle.

Drawings

FIG. 1 is a structural cross-sectional view in elevation of the present invention;

FIG. 2 is a schematic left side view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 4 is an enlarged view of a portion of the invention at I in FIG. 1.

In the figure: 1 nail body, 101 threads, 2 backstops, 3 connecting columns, 4 top buttons, 5 self-tapping tips and 6 thread cutting edges.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-4, a novel anchoring nail comprises a nail body 1, a stopper 2, a connecting post 3, a top buckle 4, a self-tapping tip 5 and a thread cutting edge 6, wherein the surface of the nail body 1 is provided with threads 101, a gap between the threads 101 is 0.8mm and is 0.35mm high, a 0.1mm round angle is arranged between the bottom of the left side of the threads 101 (namely the back stress side) and the nail body 1, a 0.3mm round angle is arranged between the bottom of the right side of the threads 101 (namely the head stress side) and the nail body 1, the upper part of the nail body 1 is provided with the stopper 2, the stopper 2 is a regular hexagon, the top angle of the regular hexagon is provided with a 0.2mm chamfer angle, the arc design of the stopper 2 is that the stopper 2 directly contacts soft tissue and bone, rounding treatment is required to avoid scratching the soft tissue, the connecting post 3 is arranged above the stopper 2, inner round angles of 0.2mm are arranged on the left side and the right side of the connecting, the arc design of the connecting column 3 is to prevent the friction suture from causing suture fracture when the suture is knotted, the upper part of the nail body 1 is fixedly connected with a top buckle 4 through the connecting column 3, the top buckle 4 is set to be regular hexagon, the apex angle of the regular hexagon is provided with a fillet of 0.3mm, the arc design of the top buckle 4 is to match the angle of a screwdriver bayonet so as to ensure that the top buckle can be separated from the screwdriver after self-tapping is finished with certain buckling firmness, a self-tapping tip 5 is arranged below the nail body 1, the angle design of the self-tapping tip 5 is to obtain enough pressure to facilitate the self-tapping to enter into the condyle, a thread cutting edge 6 is arranged at the intersection of the self-tapping tip 5 and the nail body 1, an overflow groove is arranged at the thread cutting edge 6, and a novel anchoring nail is realized through the mutual matching between the nail body 1, the thread 101, the backstop 2, the connecting column 3, the top, the overflow groove design is added in the thread 101 area, so that the top end of the screw is sharper, the self-tapping pressure is increased, and the anchoring nail is easier to drill through cortical bone; meanwhile, the overflow groove at the threaded cutting edge 6 can discharge bone fragments from the overflow groove, so that the bone fragments are not accumulated in bones to increase infection risks, and the difficulty of drilling the anchoring nail is also reduced; thinner screwdriver buckle district of design satisfies the screwdriver and can stably block the anchor nail and carry out the self tapping when, reduces its volume that exposes outside the bone, reduces the uncomfortable sense that muscle friction caused the patient.

In summary, the following steps: this neotype anchor nail through setting up nail body 1, screw thread 101, backstop 2, spliced pole 3, top knot 4, self tapping point-end 5 and screw thread blade 6, has solved the problem that the background art mentioned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel anchor nail, includes nail body (1), backstop (2), spliced pole (3), top knot (4), self tapping most advanced (5) and screw thread blade (6), its characterized in that: the upper portion of nail body (1) is provided with backstop (2), the top of backstop (2) is provided with spliced pole (3), the upper portion of nail body (1) is through spliced pole (3) fixedly connected with top knot (4), the below of nail body (1) is provided with self tapping point end (5), screw thread blade (6) have been seted up in the intersection of self tapping point end (5) and nail body (1).

2. A novel anchor stud according to claim 1, wherein: the surface of the nail body (1) is provided with a thread (101).

3. A novel anchor stud according to claim 2, wherein: the clearance between the threads (101) is 0.8mm and the height is 0.35 mm.

4. A novel anchor stud according to claim 2, wherein: a0.1 mm round corner is arranged between the bottom (back stress side) on the left side of the thread (101) and the nail body (1), and a 0.3mm round corner is arranged between the bottom (head-on stress side) on the right side of the thread (101) and the nail body (1).

5. A novel anchor stud according to claim 1, wherein: the stop dog (2) is set to be a regular hexagon, and the vertex angle of the regular hexagon is provided with a chamfer angle of 0.2 mm.

6. A novel anchor stud according to claim 1, wherein: and the left side and the right side of the connecting column (3) are provided with 0.2mm inner fillets corresponding to the positions of the top buckle (4) and the stop catch (2).

7. A novel anchor stud according to claim 1, wherein: the top buckle (4) is a regular hexagon, and the vertex angle of the regular hexagon is provided with a fillet of 0.3 mm.