CN216167783U - Claw-type universal pedicle screw and surgical operation equipment - Google Patents

Abstract

The utility model provides a universal pedicle of vertebral arch nail of claw formula, including long arm connector, bulb nail, holding piece and a plurality of hook. The long arm connector has a receiving cavity. The head of ball stud is rotatable setting in the holding intracavity of long arm connector, and the afterbody is equipped with the external screw thread, and ball stud inwards extends, is provided with the cavity along its axis direction from the head, and the afterbody is equipped with a plurality of holes that stretch out that are used for lining up external screw thread and cavity. The holding piece and the plurality of hooks are of an integrated structure and are arranged in the cavity, the holding piece is movably connected with the head, and the plurality of hooks correspond to the plurality of extending holes one to one. During the use, through the afterbody with the bulb nail with patient's skeleton thread tightening, the integral type structure that will hold piece and a plurality of hook is constituteed is packed into the bulb nail again, and a plurality of hooks are packed into and are popped out when stretching out the hole, fix on the skeleton, can effectively improve the fastening nature that the pedicle of vertebral arch nail connects. The scheme also provides a surgical operation device with the claw-type universal pedicle screw.

Description

Claw-type universal pedicle screw and surgical operation equipment

Technical Field

The utility model belongs to the technical field of surgical operations, and particularly relates to a claw-type universal pedicle screw and surgical operation equipment.

Background

Currently, in the surgical procedure for treating various unstable fracture dislocation of thoracolumbar vertebrae, degeneration of intervertebral discs, spondylolisthesis and kyphosis, one or more upper and lower vertebral bodies of an affected part need to be fixed. At present, the upper vertebral body and the lower vertebral body are fixed by adopting a mode that a pedicle screw is matched with a connecting rod. Although pedicle screw fixation is considered the most robust method, loosening of the screws is still found in many cases in the clinic.

Therefore, how to overcome the above technical defects is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a claw-type universal pedicle screw and surgical operation equipment, which can effectively improve the tightness of pedicle screw connection.

In order to solve the technical problem, the utility model provides a claw-type universal pedicle screw, which comprises a long-arm connector, a ball head screw, a holding piece and a plurality of claws;

the long arm connector has a receiving cavity;

the head part of the ball stud is rotatably arranged in the accommodating cavity of the long-arm connector, the tail part of the ball stud is provided with an external thread, the ball stud extends inwards from the head part along the axis direction of the ball stud and is provided with a cavity, and the tail part of the ball stud is provided with a plurality of extending holes which are used for penetrating through the external thread and the cavity;

the holding piece and the plurality of the hooks are of an integrated structure and are arranged in the cavity, the holding piece is movably connected with the head, and the plurality of the hooks correspond to the plurality of the extending holes one by one;

when the holding piece moves towards the direction of a patient, the plurality of hook claws are ejected from the extending holes by the cavities and are fixed on the bones of the patient; when the holding piece moves away from the patient, the plurality of hook claws shrink back to the cavity to eliminate the fixation effect with the bone of the patient.

Optionally, the holding piece and the plurality of hooks are both made of nitinol with shape memory.

Optionally, the handle is threadedly connected to the head.

Optionally, a plurality of the hooks are arranged in a staggered manner.

Optionally, the plurality of fingers are all of different lengths.

Optionally, the number of the hooks is three.

Optionally, the external thread at the tail of the ball stud comprises a single thread section and a double thread section, the double thread section is close to the head, and the single thread section is far away from the head.

Optionally, the protrusion hole is provided in the single thread segment.

The utility model also provides a surgical device comprising a claw type universal pedicle screw as described above.

The claw-type universal pedicle screw provided by the utility model has the following beneficial effects:

the tail of the ball head nail is fixed with the skeleton of a patient, the integrated structure consisting of the holding piece and the plurality of hooks is arranged in the ball head nail, the plurality of hooks are ejected out when being arranged in the extending hole and are fixed on the skeleton, and the tightness of the connection of the pedicle screws can be effectively improved.

The surgical operation equipment provided by the utility model is provided with the claw type universal pedicle screw, so that the claw type universal pedicle screw also has the beneficial effects, and the details are not repeated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a claw-type universal pedicle screw provided by the utility model;

FIG. 2 is a schematic view of the internal structure of the claw-type universal pedicle screw provided by the utility model;

fig. 3 is a partial cross-sectional view of fig. 1.

In the upper diagram:

1-a long arm connector; 2-ball head nails; 301-a grip; 302-hook jaw.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is more than two, if there are first and second described for the purpose of distinguishing technical features, but not for indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The core of the utility model is to provide a claw-type universal pedicle screw and surgical operation equipment, which can effectively improve the tightness of pedicle screw connection.

In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

The utility model provides a claw-type universal pedicle screw which comprises a long-arm connector 1, a ball stud 2, a holding piece 301 and a plurality of claw hooks 302.

Wherein the long-arm connector 1 has a receiving cavity for arranging a driving mechanism and a head of the ball stud 2. The driving mechanism is used for connecting and driving the ball stud 2 to move through operation of a doctor in the operation process.

The head of the ball stud 2 is rotatably arranged in the accommodating cavity of the long-arm connector 1, the tail is provided with external threads, the ball stud 2 extends inwards from the head along the axis direction of the head and is provided with a cavity, and the tail is provided with a plurality of extending holes for penetrating through the external threads and the cavity.

The holding piece 301 and the plurality of hooks 302 are of an integrated structure and are arranged in the cavity, the holding piece 301 is movably connected with the head, and the plurality of hooks 302 correspond to the plurality of protruding holes one by one.

When the holding piece 301 moves towards the direction of a patient, the plurality of hook claws 302 are ejected out of the extending holes from the cavities and fixed on the bone of the patient, so that the effect of reinforcing the connection strength of the pedicle screws and the bone is achieved, the whole installation process is very quick, and no loss is generated.

When the holding piece 301 moves away from the patient, the plurality of hooks 302 retract into the cavity to eliminate the fixation with the patient bone, and the pedicle screw can be smoothly taken out of the patient.

The utility model provides a pair of universal pedicle of vertebral arch nail of claw formula, it is fixed on patient's skeleton to twist through the afterbody with bulb nail 2, the integral type structure that will hold 301 and a plurality of hook 302 component again is packed into the bulb nail, a plurality of hook 302 are packed into and are popped out when stretching out the hole, fix on the skeleton, further consolidate and be connected with patient's skeleton, can effectively improve the fastening nature that the pedicle of vertebral arch nail is connected, reduce the operation degree of difficulty, alleviate the damage to the patient, save operating time, increase the firmness that pedicle of vertebral arch nail and centrum combine.

In the illustrated embodiment, the handle 301 and the plurality of fingers 302 are both a shape memory nitinol handle and fingers. The tail end of the claw is turned outwards, when the claw is placed in the cavity of the ball stud 2, the claw is extruded by the inner space, and when the claw tip moves to the extending hole, the claw is rapidly ejected out of the extending hole and fixed on a bone. When the pedicle screw needs to be taken out, the claw is pulled to be pulled out of the skeleton and retracted to the cavity of the ball head screw 2, so that the reinforcing effect of the claw is eliminated.

In a particular embodiment, the grip 301 is threadedly coupled to the head. The hook claw moves towards the patient relative to the ball stud by rotating the holding piece, so that the operation is completed.

In order to facilitate the arrangement of the hooks 302 in the cavity of the ball stud, a plurality of hooks 302 are arranged in a staggered manner. The plurality of fingers 302 have different lengths, and each finger 302 has an escape space in its cross section. Specifically, the number of fingers 302 is three. Of course, the fingers 302 include, but are not limited to, the above-mentioned number ranges.

In a specific embodiment, the external thread at the tail part of the ball stud 2 comprises a single thread section and a double thread section, the double thread section is close to the head part, and the single thread section is far away from the head part. The extending hole is arranged on the single thread section.

When a doctor implants the ball stud 2, the holding piece 301 is located at a position close to the tip of the ball stud 2, and at the moment, the tip of the hook claw 302 is hidden at the thread tooth position of the corresponding extending hole of the ball stud 2, so that the screwing-in of the ball stud is not influenced. When the surgeon rotates the grip 301, the fingers 302 extend distally through the extension holes into the cancellous bone of the vertebra, which may improve grip for osteoporotic patients.

The hook claw outlets on the ball head nail are all arranged at the single thread section of the screw body thread section, and the single thread section is implanted into cancellous bone with higher holding force.

In addition, the embodiment also provides a surgical device which comprises the claw-type universal pedicle screw.

Since the surgical device has the claw-type universal pedicle screw, the surgical device has the beneficial effects brought by the claw-type universal pedicle screw, please refer to the above contents, and the details are not repeated herein.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (9)

1. A claw-type universal pedicle screw is characterized by comprising a long-arm connector (1), a ball head nail (2), a holding piece (301) and a plurality of hook claws (302);

the long arm connector (1) is provided with a containing cavity;

the head part of the ball stud (2) is rotatably arranged in the accommodating cavity of the long-arm connector (1), the tail part of the ball stud is provided with an external thread, the ball stud (2) extends inwards from the head part along the axis direction of the ball stud and is provided with a cavity, and the tail part of the ball stud is provided with a plurality of extending holes which are used for penetrating through the external thread and the cavity;

the holding piece (301) and the plurality of hooks (302) are of an integrated structure and are arranged in the cavity, the holding piece (301) is movably connected with the head, and the plurality of hooks (302) correspond to the plurality of extending holes one by one;

when the holding piece (301) moves towards the direction of a patient, a plurality of hook claws (302) are ejected from the extending hole by the cavity and fixed on the bone of the patient; when the holding piece (301) moves away from the patient, the plurality of hook claws (302) retract back into the cavity to remove the fixation with the patient's bone.

2. The claw type universal pedicle screw according to claim 1, wherein the holding piece (301) and the plurality of the hook claws (302) are made of a nickel titanium memory alloy material with a deformation memory.

3. The claw type universal pedicle screw according to claim 1, wherein the holding piece (301) is in threaded connection with the head.

4. The claw type universal pedicle screw according to claim 1, wherein a plurality of the claws (302) are arranged in a staggered manner.

5. The claw type universal pedicle screw according to claim 4, wherein the plurality of claws (302) are all different in length.

6. The claw type universal pedicle screw according to claim 1, wherein the number of the hook claws (302) is three.

7. The claw type universal pedicle screw according to claim 1, wherein the external thread of the tail portion of the ball head screw (2) comprises a single thread section and a double thread section, the double thread section is close to the head portion, and the single thread section is far away from the head portion.

8. The claw type universal pedicle screw according to claim 7, wherein the extension hole is provided in the single thread segment.

9. Surgical device comprising a claw type universal pedicle screw according to any one of claims 1 to 8.

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