CN203724202U

CN203724202U - Long-tail pedicle screw

Info

Publication number: CN203724202U
Application number: CN201420053639.1U
Authority: CN
Inventors: 钱建锋
Original assignee: Chuan Hui Medical Apparatus And Instruments Jiangsu Co
Current assignee: Chuan Hui Medical Apparatus And Instruments Jiangsu Co
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2014-07-23
Anticipated expiration: 2024-01-27

Abstract

The utility model relates to a long-tail pedicle screw. The pedicle screw comprises a screw body and a U-shaped screw cap connected to the rear end of the screw body. A surrounding breakage groove with the central axis of the U-shaped screw cap serving as the center is formed in the outer wall of the U-shaped screw cap. A surrounding inner groove with the central axis of the U-shaped screw cap serving as the center is formed in the groove wall, close to the screw body, of the breakage groove. No sharp edge exists on the breakage surface of the long-tail pedicle screw after the pedicle screw is broken.

Description

Long-tail pedicle nail

Technical field

This utility model relates to a kind of long-tail pedicle nail, belongs to technical field of medical instruments.

Background technology

At present, on the head of a nail outer wall of long-tail pedicle nail, be provided with snap slot, the object that this snap slot is set is after implanting health in rivet nut, its afterbody to be fractureed, but existing long-tail pedicle is followed closely after fractureing, its fracture has cutting edge of a knife or a sword rib and exists, can damage local soft tissue, increase patient's misery, be unfavorable for rehabilitation.

Utility model content

The purpose of this utility model is to overcome the defect that prior art exists, and provides after a kind of fractureing fracture without the long-tail pedicle nail of cutting edge of a knife or a sword rib.

This utility model solves the technical scheme that its technical problem adopts: a kind of long-tail pedicle nail, comprise rivet nut and the U-shaped head of a nail that is connected to rivet nut rear end, on the outer wall of the described U-shaped head of a nail, have centered by the axis of the U-shaped head of a nail around snap slot, on the cell wall of the close rivet nut of described snap slot, have centered by the axis of the U-shaped head of a nail around inner groovy.

On the inwall of the described U-shaped head of a nail, have centered by the axis of the U-shaped head of a nail around groove, this groove is near snap slot.

Described groove is triangular groove.

Described groove is between rivet nut and snap slot.

The beneficial effects of the utility model: (one) has inner groovy in the snap slot of the head of a nail outer wall of long-tail pedicle nail, and have triangle groove at head of a nail inwall, in proof strength, be more prone to fracture, and on the fracture after fractureing, there is no cutting edge of a knife or a sword rib, effectively avoid local soft tissue to damage, reduce patient's misery, be beneficial to rehabilitation.(2) highly versatile, fractures easily, conveniently performs the operation, and can substitute short-tail pedicle nail completely.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail.

Fig. 1 is broken section structural representation of the present utility model;

Fig. 2 is the structure for amplifying schematic diagram of B in Fig. 1.

Fig. 3 is the sectional structure schematic diagram of the head of a nail of existing long-tail pedicle nail;

Fig. 4 is the structure for amplifying schematic diagram of A in Fig. 3.

Detailed description of the invention

As illustrated in fig. 1 and 2, a kind of long-tail pedicle nail, comprise rivet nut 1 and the U-shaped head of a nail 2 that is connected to rivet nut 1 rear end, on the outer wall of the described U-shaped head of a nail 2, have centered by the axis of the U-shaped head of a nail 2 around snap slot 21, on the cell wall of the close rivet nut 1 of described snap slot 21, have centered by the axis of the U-shaped head of a nail 2 around inner groovy 22.On the inwall of the described U-shaped head of a nail 2, have centered by the axis of the U-shaped head of a nail 2 around groove 23, this groove 23 is between rivet nut 1 and snap slot 21, and near snap slot 21.

Preferred embodiment: described groove 23 is triangular groove.

Should be appreciated that specific embodiment described above is only for explaining this utility model, and be not used in restriction this utility model.The apparent variation of being extended out by spirit of the present utility model or variation are still among protection domain of the present utility model.

Claims

1. a long-tail pedicle nail, comprise rivet nut (1) and be connected to the U-shaped head of a nail (2) of rivet nut (1) rear end, on the outer wall of the described U-shaped head of a nail (2), have centered by the axis of the U-shaped head of a nail (2) around snap slot (21), it is characterized in that: on the cell wall of the close rivet nut (1) of described snap slot (21), have centered by the axis of the U-shaped head of a nail (2) around inner groovy (22).

2. long-tail pedicle according to claim 1 nail, is characterized in that: on the inwall of the described U-shaped head of a nail (2), have centered by the axis of the U-shaped head of a nail (2) around groove (23), this groove (23) is near snap slot (21).

3. long-tail pedicle nail according to claim 2, is characterized in that: described groove (23) is triangular groove.

4. long-tail pedicle nail according to claim 2, is characterized in that: described groove (23) is positioned between rivet nut (1) and snap slot (21).