CN215228296U

CN215228296U - Hollow screw for orthopedic surgery

Info

Publication number: CN215228296U
Application number: CN202120898884.2U
Authority: CN
Inventors: 马智林
Original assignee: Affiliated Hospital Of Hebei University Of Engineering
Current assignee: Affiliated Hospital Of Hebei University Of Engineering
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-12-21
Anticipated expiration: 2031-04-28

Abstract

The utility model belongs to the technical field of hollow screws, and discloses a hollow screw for orthopedic surgery, which comprises a screw body, wherein the screw body comprises a screw rod, a screw tail and a screw head, the screw rod is positioned between the screw tail and the screw head, and the screw tail, the screw rod and the screw head are integrally formed, two sides of the outer wall of the screw rod are provided with a first perforation and a second perforation which are parallel, the utility model adds a larger locking hole, a first jack and a second jack which are symmetrical, so that the fastening nail at the middle part has two through directions, the selectivity of the through direction of the fastening nail at the middle part is increased, and the second jack is not parallel with the two perforations, thereby realizing the non-parallel fixation of the fastening nail at the middle part and the fastening nails at the two ends, in addition, when the positioning rod is utilized to position the screw body and the medicament needs to be added, the medicament can be added from the through hole at the end part of the screw tail, the medicament can smoothly enter the skeleton along the diversion trench, and the blocking of the positioning rod can be avoided.

Description

Hollow screw for orthopedic surgery

Technical Field

The utility model belongs to the technical field of hollow screw, concretely relates to hollow screw for bone surgery.

Background

Orthopedics is one of the most common departments in various hospitals, mainly studies the anatomy, physiology and pathology of skeletal muscle systems, and maintains and develops the normal form and function of the system by using medicines, operations and physical methods.

In chinese patent No. CN201620398674.6, a cannulated screw for orthopedic surgery is disclosed, which describes that "the pitch of the end thread is greater than the pitch of the tail thread, facilitating screwing in, and the screwing in process makes the centrum and vertebral plate pressurizing limited due to different pitches", but the fixed angle of the locking hole is consistent when the traditional screw is fixed, which easily results in the screw loosening, besides, the traditional cannulated screw is not provided with an effective liquid guiding structure, when the medicament is added from the cannulated screw, the positioning rod is easy to block.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hollow screw for bone surgery to it is unanimous to provide the fixed angle of traditional lockhole in solving above-mentioned background art, leads to the not hard up problem of screw easily, in addition, does not set up effectual drain structure, and when the medicament adds from hollow screw in, the locating lever produced the problem that blocks easily.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hollow screw for bone surgery, includes the screw body, the screw body includes nail pole, nail tail and pin fin, the nail pole is located between nail tail and the pin fin, and nail tail, nail pole and pin fin integrated into one piece, the outer wall both sides of nail pole are seted up parallel first perforation and the second is perforated, and the outer wall of nail pole is close to intermediate position department and has seted up the locking hole, first jack and second jack have been seted up to nail pole outer wall and the one side symmetry relative with the locking hole, the through-hole has been seted up to the axial of screw body, the locating lever is worn to be equipped with in the inside of through-hole, the guiding gutter has been seted up to the exterior wall of locating lever.

Preferably, the outer wall of the nail tail is provided with tail threads, the outer wall of the nail head is provided with head threads, and the thread pitch of the head threads is larger than that of the tail threads.

Preferably, the outer wall of the positioning rod and one end close to the tail of the nail are fixed with two lugs.

Preferably, the first and second through holes have an inner diameter smaller than that of the through hole.

Preferably, the number of the diversion trenches is four, and the four diversion trenches are distributed on the outer wall of the positioning rod in an annular array.

Preferably, the end part of the outer wall of the nail tail is symmetrically fixed with a stop block.

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

(1) the utility model discloses an add great locking hole to and symmetrical first jack and second jack, make the binding nail at middle part have two directions of wearing to establish, increased the selectivity that the middle part binding nail passed the direction, and second jack and two perforation nonparallels, thereby can realize that the non-parallel of middle part binding nail and both ends binding nail is fixed, and then improved the stability of fix with screw.

(2) The utility model discloses an add the guiding gutter at the exterior wall of locating lever, when utilizing the locating lever to screw body positioning process and need add the medicament, can add the medicament from the through-hole of nail tail tip, the medicament can get into skeleton department smoothly along the guiding gutter, can avoid blockking of locating lever, has guaranteed the smoothness nature of medicament replenishment.

Drawings

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

FIG. 2 is an external view of the present invention;

FIG. 3 is a side view of the positioning rod of the present invention;

in the figure: 1. a nail rod; 2. nailing tail; 3. a nail head; 4. tail threads; 5. a through hole; 6. positioning a rod; 7. a bump; 8. a first perforation; 9. a locking hole; 10. a first jack; 11. a second jack; 12. a second perforation; 13. a head thread; 14. a diversion trench; 15. and a stop block.

Detailed Description

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.

Referring to fig. 1-3, the present invention provides the following technical solutions: a hollow screw for orthopedic surgery comprises a screw body, the screw body comprises a screw rod 1, a screw tail 2 and a screw head 3, the screw rod 1 is positioned between the screw tail 2 and the screw head 3, the screw tail 2, the screw rod 1 and the screw head 3 are integrally formed, a first perforation 8 and a second perforation 12 which are parallel are arranged on two sides of the outer wall of the screw rod 1, a locking hole 9 is arranged on the outer wall of the screw rod 1 close to the middle position, a first jack 10 and a second jack 11 are symmetrically arranged on one side of the outer wall of the screw rod 1 opposite to the locking hole 9, a fastening screw can pass through the first jack 10 or the second jack 11 after passing through the locking hole 9, so that the fastening screw in the middle part has two passing directions, the selectivity of the passing direction of the fastening screw in the middle part is increased, the second jack 11 is not parallel to the two perforation, the non-parallel fixation of the fastening screw in the middle part and the fastening screws at two ends can be realized, and the stability of the screw fixation is improved, through-hole 5 has been seted up to the axial of screw body, and locating lever 6 is worn to be equipped with in the inside of through-hole 5, and guiding gutter 14 has been seted up to the exterior wall of locating lever 6, when utilizing locating lever 6 to screw body location in-process and need add the medicament, can follow through-hole 5 of 2 tip of nail tail and add the medicament, and the medicament can get into skeleton department smoothly along guiding gutter 14, can avoid blockking of locating lever 6, has guaranteed the smoothness nature of medicament replenishment.

Further, the outer wall of the nail tail 2 is provided with a tail thread 4, the outer wall of the nail head 3 is provided with a head thread 13, the thread pitch of the head thread 13 is larger than that of the tail thread 4, and the stability can be improved due to different thread pitches in the screwing process.

Furthermore, the outer wall of the positioning rod 6 and one end close to the nail tail 2 are fixed with two lugs 7, and the lugs 7 are designed to prevent the tail end of the positioning rod 6 from sliding into the through hole 5.

Further, the inner diameters of the first through hole 8 and the second through hole 12 are smaller than the inner diameter of the through hole 5, and when the fastening nail is inserted into the first through hole 8 and the second through hole 12, the through hole 5 can be prevented from being blocked.

Furthermore, the number of the diversion grooves 14 is four, the four diversion grooves 14 are distributed on the outer wall of the positioning rod 6 in an annular array, a plurality of diversion channels can be provided for the medicament by arranging the diversion grooves 14, and the medicament guiding is more convenient.

Furthermore, the end part of the outer wall of the nail tail 2 is symmetrically fixed with a stop block 15, when the screw body is rotated, the stop block 15 can reduce the hand slip, and the screw body is convenient to rotate.

The utility model discloses a theory of operation and use flow: when the utility model is used, the positioning rod 6 can be firstly utilized for positioning, the screw body can be rotated after the positioning, wherein, the thread pitch of the head thread 13 on the pin head 3 and the thread pitch of the tail thread 4 on the pin tail 2 are different, the stability of the fixing can be increased, secondly, when the positioning rod 6 is utilized to position the screw body and the medicament needs to be added, the medicament can be added from the through hole 5 at the end part of the pin tail 2, the medicament can smoothly enter the skeleton along the diversion trench 14, the blocking of the positioning rod 6 can be avoided, the fluency of the medicament supplement is ensured, in addition, the fastening nail can pass through the first jack 10 or the second jack 11 after passing through the locking hole 9, so that the fastening nail at the middle part has two passing directions, the selectivity of the passing direction of the fastening nail at the middle part is increased, and the second jack 11 is not parallel with the two through holes, thereby the non-parallel fixing of the fastening nail at the middle part and the two ends can be realized, thereby improving the stability of the screw fixation.

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. A cannulated screw for use in bone surgery, characterized by: the novel screw comprises a screw body, the screw body comprises a screw rod (1), a screw tail (2) and a screw head (3), the screw rod (1) is located between the screw tail (2) and the screw head (3), the screw tail (2), the screw rod (1) and the screw head (3) are integrally formed, a first perforation hole (8) and a second perforation hole (12) which are parallel to each other are formed in two sides of the outer wall of the screw rod (1), a locking hole (9) is formed in the position, close to the middle of the outer wall of the screw rod (1), a first insertion hole (10) and a second insertion hole (11) are symmetrically formed in the outer wall of the screw rod (1) and the side, opposite to the locking hole (9), of the screw body is axially provided with a through hole (5), a positioning rod (6) is arranged inside the through hole (5), and a diversion groove (14) is formed in the outer wall of the positioning rod (6).

2. A cannulated screw for bone surgery according to claim 1, wherein: the outer wall of the nail tail (2) is provided with a tail thread (4), the outer wall of the nail head (3) is provided with a head thread (13), and the thread pitch of the head thread (13) is larger than that of the tail thread (4).

3. A cannulated screw for bone surgery according to claim 1, wherein: the outer wall of the positioning rod (6) and one end close to the nail tail (2) are fixed with two convex blocks (7), and the number of the convex blocks (7) is two.

4. A cannulated screw for bone surgery according to claim 1, wherein: the inner diameters of the first through hole (8) and the second through hole (12) are smaller than the inner diameter of the through hole (5).

5. A cannulated screw for bone surgery according to claim 1, wherein: the number of the guide grooves (14) is four, and the four guide grooves (14) are distributed on the outer wall of the positioning rod (6) in an annular array.

6. A cannulated screw for bone surgery according to claim 1, wherein: the end part of the outer wall of the nail tail (2) is symmetrically fixed with a stop block (15).