CN211131341U

CN211131341U - Porous lightweight femoral neck hollow screw based on 3D printing

Info

Publication number: CN211131341U
Application number: CN201921307132.3U
Authority: CN
Inventors: 陈宣煌; 林海滨; 蔡涵华; 郑锋
Original assignee: AFFILIATED HOSPITAL OF PUTIAN UNIVERSITY
Current assignee: AFFILIATED HOSPITAL OF PUTIAN UNIVERSITY
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-07-31
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a porous lightweight femoral neck hollow screw based on 3D printing, which comprises a screw, wherein one end of the screw is fixedly connected with a screw cap, the outer surface wall of the other end of the screw is provided with threads, the tip is a self-tapping tip blade, the outer surface wall of the screw is provided with a plurality of bone trabecula growing holes, the inside of the screw is provided with a hole channel, the middle part of the screw cap is provided with a mounting hole corresponding to the position of the hole channel, the inside of the hole channel is provided with an internal thread corresponding to the position of the mounting hole, and the inside of the hole channel is provided with an internal bolt; the utility model discloses the fixture can not destroy bone trabecula structure in implanting, and interior fixture can not obstruct the bone trabecula and rebuild at the union in-process of fracture, can effectively resume local normal structure of skeleton and mechanical conductivity, increases fracture internal fixation's stability and reliability, has reduced the not hard up probability of screw, simultaneously, need not the secondary operation and takes out interior fixture, has reduced patient's misery, has still reduced patient's economic burden simultaneously.

Description

Porous lightweight femoral neck hollow screw based on 3D printing

Technical Field

The utility model relates to a medical instrument technical field specifically is a porous lightweight femoral neck hollow screw based on 3D prints.

Background

The femoral neck fracture is a common frequently-occurring disease in orthopedics department and is frequently generated in old people, the incidence rate of the femoral neck fracture continuously rises along with the gradual coming of aging society, so the treatment of the femoral neck fracture of the old people is always one of the key points of traumatic orthopedic research, the internal fixation treatment is an irreplaceable important method for treating proximal femoral fractures such as the femoral neck fracture, and the like, and the internal fixation is found in clinical treatment, although the internal fixation is an irreplaceable important method, the improvement is necessary, particularly, important trabecular bone structures are arranged in cancellous bones of bones such as two ends of long bones of four limbs, vertebrae, calcaneus and the like of human bodies, the key effect is realized on maintaining the normal shape and mechanical conduction of the bones, however, the trabecular bone structures can be further damaged by implanting internal fixation objects after fracture, the reconstruction of the trabecular bone in the fracture healing process can be prevented by the existence of internal fixation objects, and the local normal structure and the, local stress concentration can be caused, proximal femoral fractures such as femoral neck fractures and the like can be caused, complications such as loosening, withdrawing, breaking of internal fixation objects, non-union of fractures and fractures around the internal fixation objects can be caused, meanwhile, the internal fixation objects need to be taken out through a secondary operation after the fractures are healed, the pain of a patient is increased, and the economic burden of the patient is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a porous lightweight thighbone neck hollow screw based on 3D prints, in order to solve the fracture back implantation interior fixture that proposes in the above-mentioned background art and can further destroy bone trabecula structure, the existence of interior fixture can obstruct the bone trabecula and rebuild at the union in-process, can not effectively resume local normal structure of skeleton and mechanical conductivity, probably lead to local stress concentration, cause thighbone near-end fractures such as thighbone neck fracture, and interior fixture is not hard up, withdraw from, the fracture, fracture nonunion, complications such as fracture around the interior fixture, and simultaneously, still must secondary operation take out interior fixture after the union of fracture, patient's misery has not only been increased, patient's economic burden's problem has still been increased simultaneously.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a porous lightweight thighbone neck hollow screw based on 3D prints, includes the screw, the one end fixedly connected with head of a nail of screw, set up screw thread on the other end outside the table wall of screw, and most advanced self tapping point sword that is, a plurality of trabecula bone growth hole has been seted up on the outside table wall of screw, the pore has been seted up to the inside of screw, the middle part of head of a nail corresponds the mounting hole has been seted up to the position in pore, the inside in pore corresponds the internal thread has been seted up to the position in mounting hole, the internally mounted in pore has interior bolt.

Preferably, the tail part of the inner bolt is provided with an external thread matched with the internal thread, and the top part of the inner bolt is conical.

Preferably, the tail part of the inner bolt is provided with an inner hexagonal groove.

Preferably, the outer surface wall of the inner bolt is provided with a through hole matched with the trabecular bone growth hole.

Preferably, the screw and the inner bolt are threadedly connected through the inner thread.

Preferably, the screw and the inner bolt are integrally formed by adopting a 3D printing technology.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses, through set up a plurality of bone trabecula growth hole on the screw exterior wall, through-hole on bone trabecula growth hole and the interior bolt is linked together, the back is implanted to the screw, the bone trabecula of bone trabecula growth hole both sides can grow and connect along bone trabecula growth hole, hollow screw's shrinkage pool and centre bore have been filled to the bone trabecula simultaneously, make the bone trabecula and the screw connection of screw both sides as an organic whole, can be better make things convenient for the bone trabecula to rebuild at the union in-process, effectively resume local normal structure of skeleton and mechanical conductivity, the screw need not take out after the union of fracture simultaneously, patient's misery and treatment cost have been reduced.

2. The utility model discloses, change screw and fracture department cancellous bone contact mode through the inflation, intensity and anti-rotation strength are extracted to the resistance that can effectual improvement cancellous bone screw, increase cancellous bone and to the holding power of screw, increase the stability and the reliability of fracture internal fixation, have reduced the not hard up probability of screw, reduce the failure risk of operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view of the present invention;

fig. 3 is a schematic view of the structure of the internal bolt of the present invention.

In the figure: 1. a screw; 2. a nail cap; 3. a thread; 4. a self-tapping tip edge; 5. a trabecular bone growth aperture; 6. a duct; 7. an internal thread; 8. mounting holes; 9. an inner bolt; 10. an inner hexagonal groove; 11. and a through hole.

Detailed Description

In order to avoid implanting behind the fracture internal fixation thing can further destroy bone trabecula structure, the existence of avoiding internal fixation thing can hinder bone trabecula and rebuild at the union of fracture in-process, can effectively resume local normal structure of skeleton and mechanical conductivity, avoid leading to local stress concentration, avoid causing thighbone near-end fracture such as thighbone neck fracture, it is not hard up to avoid internal fixation thing, withdraw from, the fracture is nonunion, complications such as fracture around the internal fixation thing, and simultaneously, need not take out internal fixation thing by secondary operation after the union of fracture, the patient's misery has been reduced, patient's economic burden has still been reduced simultaneously, the embodiment of the utility model provides a porous lightweight thighbone neck hollow screw based on 3D prints. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the embodiment provides a porous lightweight femoral neck hollow screw based on 3D printing, which includes a screw 1, a nut 2 fixedly connected to one end of the screw 1, a thread 3 formed on an outer surface wall of the other end of the screw 1, the tip is a self-tapping tip edge 4, the outer surface wall of the screw 1 is provided with a plurality of bone trabecula growing holes 5, the inside of the screw 1 is provided with a hole passage 6, the middle part of the screw cap 2 is provided with a mounting hole 8 corresponding to the position of the hole passage 6, the inside of the hole passage 6 is provided with an internal thread 7 corresponding to the position of the mounting hole 8, the inside of the hole passage 6 is provided with an internal bolt 9, the tail part of the internal bolt 9 is provided with an internal hexagonal groove 10, the tail part of the internal bolt 9 is provided with an external thread matched with the internal thread 7, the top of the internal bolt 9 is conical, and the outer surface wall of the internal bolt 9 is provided with a through hole 11.

In the embodiment, when in use, firstly, the screw 1 is customized individually and accurately according to anatomical data of a patient by a 3D printing technology, then the screw 1 is screwed into the femoral head of the patient along the direction of the screw 3 by using the self-tapping sharp-end blade 4, the fracture broken end is fixed, then the internal screw 9 is inserted into the pore canal 6 inside the screw 1, the internal screw 9 is screwed into the internal screw 9 through the internal hexagonal groove 10, the internal thread 7 is matched with the external thread on the internal screw 9 until the expansion gaps of the self-tapping sharp-end blade 4 and the screw 3 are expanded, the fracture part is fixed firmly, the holding force of cancellous bone on the screw 1 and the stability and reliability of internal fixation of fracture are increased, meanwhile, the loosening probability of the screw 1 is reduced, the bone trabecular growth hole 5 on the screw 1 and the through hole 11 on the internal screw 9 are opposite to the direction, the bone trabecular on both sides of the screw 1 can grow and connect along the bone trabecular growth hole, meanwhile, the trabecula fills the trabecula growth hole 5 on the screw 1 and the through hole 11 on the inner bolt 9, so that the trabecula on two sides of the screw 1 and the screw 1 are connected into a whole, the reconstruction of the trabecula in the fracture healing process can be better facilitated, and the local normal structure and the mechanical conductivity of the skeleton can be effectively recovered.

Example 2

Referring to fig. 1-3, a further improvement is made on the basis of embodiment 1: screw 1 and interior bolt 9 pass through internal thread 7 threaded connection, through the cooperation of the external screw thread on internal thread 7 and the interior bolt 9, make the more stable and firm that interior bolt 9 is connected, screw 1 and interior bolt 9 all adopt 3D to print technology integrated into one piece, carry out the accurate customization of individuation to patient's anatomical data, shortened the time that the operation was implemented to improve the operation effect, reduced the operation risk.

In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

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 porous lightweight femoral neck cannulated screw based on 3D prints, includes screw (1), its characterized in that: the one end fixedly connected with head of a nail (2) of screw (1), set up screw thread (3) on the outer table wall of the other end of screw (1), and most advanced self tapping point sword (4), a plurality of trabecula bone growth hole (5) have been seted up on the outer table wall of screw (1), pore (6) have been seted up to the inside of screw (1), the middle part of head of a nail (2) corresponds mounting hole (8) have been seted up to the position of pore (6), the inside of pore (6) corresponds internal thread (7) have been seted up to the position of mounting hole (8), the internally mounted of pore (6) has interior bolt (9).

2. The 3D printing-based porous lightweight femoral neck cannulated screw of claim 1, wherein: the tail part of the inner bolt (9) is provided with an external thread matched with the internal thread (7), and the top part of the inner bolt (9) is conical.

3. The 3D printing-based porous lightweight femoral neck cannulated screw of claim 1, wherein: the tail part of the inner bolt (9) is provided with an inner hexagonal groove (10).

4. The 3D printing-based porous lightweight femoral neck cannulated screw of claim 1, wherein: the outer surface wall of the inner bolt (9) is provided with a through hole (11) matched with the bone trabecula growing hole (5).

5. The 3D printing-based porous lightweight femoral neck cannulated screw of claim 1, wherein: the screw (1) and the inner bolt (9) are in threaded connection through the inner thread (7).

6. The 3D printing-based porous lightweight femoral neck cannulated screw of claim 1, wherein: the screw (1) and the inner bolt (9) are integrally formed by adopting a 3D printing technology.