CN203468723U

CN203468723U - Combined type percutaneous zygopophysis pedicle screw internal fixation system

Info

Publication number: CN203468723U
Application number: CN201220736741.2U
Authority: CN
Inventors: 肖洪; 周跃; 李�杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-28
Filing date: 2012-12-28
Publication date: 2014-03-12
Anticipated expiration: 2022-12-28

Abstract

The utility model relates to a lumbar vertebral arch internal fixed screw used for orthopedic surgery of a hospital and an application device of the screw, and specifically relates to a combined type percutaneous zygopophysis pedicle screw internal fixation system. The combined type percutaneous zygopophysis pedicle screw internal fixation system comprises a locating sheathing canal used for determining screw settlement angle and a body surface position, a corresponding inner core, a guide needle used for determining the screw settlement depth, an expander used for expanding a human body screw settlement channel, a medical hollow drill and a drilling tool for drilling bones, a tapping screw rod, a screw implantation machine and a pedicle screw. The pedicle screw is divided into a third screw thread section, a fourth screw thread section and an elevating nut from the front end to the rear end; and the screwing installing device is of a double layer sleeve structure, a locking mechanism is arranged between a rear face of the inner layer sleeve and a rear face of the external layer sleeve. According to the utility model, the technical problems existing in the prior art that accessories are relatively complex, many special devices are employed, and the production cost is relatively high are overcome, and the combined type percutaneous zygopophysis pedicle screw internal fixation system which is simple to operate and low in improvement cost is provided.

Description

Combined type percutaneous articular process cervical arc root screw internal fixing system

Technical field

This utility model relates to a kind of lumbar vertebra vertebral arch internal fixation screw of hospital orthopedics operation use and the application apparatus of this screw thereof, belongs to medical instruments field.

Background technology

The world today is the medical skill of prosperity increasingly, successfully solved and be difficult in the past in a large number the difficult miscellaneous diseases of healing, but the disease simultaneously changing also constantly occurs in the upgrading along with technology so how more can improve therapeutic effect just putting in face of numerous scientific research personnel.

Chinese utility model patent 02157300.X discloses a kind of pier bridge-type pedicle system, it forms wherein Orthopedic rod by some Orthopedic rods and cross-bridges and a plurality of pedicle screw is cylindrical barred body, cross-bridges is flat square body, pedicle screw includes shank of screw, the hypomere body of rod of shank of screw is provided with external screw thread, its upper end is expanded head of screw and is had and the Orthopedic rod external diameter U-shaped deep trouth that matches, and expand in the two side of the U-shaped deep trouth of correspondence of head of screw is equipped with, external screw thread, have on the two side of head of screw and U-shaped deep trouth direction shallow square groove perpendicular and that match with cross-bridges profile expanding, Orthopedic rod is placed in pedicle screw and expands in the U-shaped deep trouth of head of screw, by pushing down by the female thread on head of screw two side with externally threaded the first inner core, by tapped the first overcoat, by the external screw thread on head of screw two side, pushed down again simultaneously, cross-bridges is placed in and expands in the shallow square groove of two side of head of screw, it is positioned on the first inner core and the first overcoat, and also by with externally threaded the second inner core and tapped the second overcoat also respectively by head of screw two side, external screw thread is pushed down, make Orthopedic rod and cross-bridges be fixed on expanding on head of screw of same pedicle screw simultaneously.

Chinese utility model patent 01808976.3 discloses again a kind of bone screw that is used in particular for the external fixator in fracture stabilization, comprise and there is predetermined length and diameter towards ending at the most advanced and sophisticated tapered slender cylinder in threaded end, and relative screw handles end, it is characterized in that: its screw is handled end and had the diameter identical in fact with slender cylinder and be included in the planar section that in the major part that its cylinder do not have threaded part, axle cylindrical with it extends in parallel.In a further embodiment, this screw manipulatable end is formed with a plurality of planar sections, and this planar section extends in parallel along cylindrical axle with predetermined space.These planar sections at this cylinder and in the major part of threaded part, do not extend and replace with bossing.

Chinese utility model patent 03101477.1 discloses a kind of intramedullary pin, screw has been inserted to the devices and methods therefor of intramedullary pin, and pilot hole is formed between the intramedullary pin and distal screw director element inserting in medullary cavity.The guide wire that diameter is less than to each pilot hole inserts pilot hole, and holes along guide wire.Then, metallic screw is retained on intramedullary pin, prevents that intramedullary pin from moving up and down and reversing, thereby can be not easily by X-ray imaging device and insert exactly distal metal screw.Therefore, reduce operating time, prevent the unwanted bone injury of patient or infection, greatly reduce patient and/or doctor is exposed in X-radiation.

Though above-mentioned utility model respectively has feature, all there are some defects, more such as accessory more complicated, special equipment, production cost is higher, and the bad and operating procedure of effect after product application is more loaded down with trivial details etc.

Utility model content

The technical problems to be solved in the utility model is to provide a kind ofly can utilize existing surgical apparatus, and improving cost is low, the combined type percutaneous articular process cervical arc root screw internal fixing system that effect is good.

In order to solve the problems of the technologies described above, this utility model provides following technical scheme:

Combined type percutaneous articular process cervical arc root screw internal fixing system, comprise location sheath pipe and corresponding inner core for determining angle of pedicle screw and body surface position, for determining, put the nail degree of depth guide pin, for expanding body surface, put the dilator of nail passage, for boring medical hollow drill and drilling tool, tapping screw rod, upper nail device and the pedicle screw of bone;

Wherein dilator comprises the first long tube and is socketed in second outside the first long tube pipe, and pipe is positioned on the first long tube by lock pin in second; Described dilator is provided with for dilator being shelved on to the fan-shaped leaf of body surface, and this fan-shaped leaf is slidably matched and is formed by some sector elements;

Described drilling tool is hollow rods, and this rod member is divided into the first thread segment, the second thread segment, spacing bulb and smooth shaft section successively to rear end by front end, and wherein the major diameter of thread of the first thread segment is less than the second thread segment;

Described pedicle screw is hollow-core construction, is divided into successively the 3rd thread segment, the 4th thread segment and lifting nut by front end to rear end; Described the 3rd thread segment major diameter of thread equates and is greater than the first thread segment, the 3rd thread segment is provided with deep thread, the 4th thread segment is provided with shallow thread, lifting nut is provided with the barrel being threaded with the 4th thread segment, lifting nut rear end face is provided with inner hexagonal hole, on the 4th thread segment rear end face, offer keyway, the shallow thread on the 4th thread segment is discontinuity screw thread, and described the 3rd, two thread segment major diameter of threads equate with described barrel external diameter;

Described upper nail device is double-layer sleeve structure, and inner layer sleeve is connected with described keyway para-position by the connecting key of its front end, and outer layer sleeve is connected with the para-position of described inner hexagonal hole shape by the protruding key of its front end; Between the rear end face of described inside and outside layer sleeve, be provided with lockable mechanism;

Described tapping rod member is the hollow rods that is provided with the tapping thread mating with the 3rd thread segment.

Under medical image system auxiliary, pedicle screw internal fixation operation process is: 1, manually the location sheath pipe that is arranged with inner core is inserted by body surface, until offset with corresponding articular process surface, then keep location sheath pipe invariant position, taking-up inner core; 2, guide pin is inserted in the sheath pipe of location, and utilizes medical hollow drill to rotarily actuate this guide pin; Make guide pin drill articular process and arrive at the pedicle of vertebral arch position of adjacent vertebrae, so set up a preliminary bone road; 3, location sheath pipe is taken off, on guide pin, be inserted in dilator, carry out body surface expansion, before this first long tube was got involved to body surface, thereby and then untie corresponding lock pin and pipe in second is got involved to body surface further expand, can taking down the exhibits to realize the supporting of dilator located or picked and placeed by fan-shaped leaf; 4, in dilator, on guide pin, be inserted in again the above-mentioned drilling tool that is hollow rods, under driving with medical hollow drill, drilling tool has been realized reaming by first and second thread segment to above-mentioned preliminary bone road, facilitate the tapping operation of pedicle screw, until the first thread segment is drilled into the bottom in above-mentioned preliminary bone road, drilling tool stops piercing; The spacing bulb arranging on drilling tool is in order to prevent that careless manipulation drilling tool from drilling the security set that pedicle of vertebral arch is done, distance value between spacing bulb and drilling tool front end is to adapt with the normal physiologic values of articular process to pedicle of vertebral arch, and generally spacing bulb can abut to articular process; 5, take out drilling tool, on guide pin, be inserted in again tapping rod member, carry out the screw thread that on artificial tapping ，Gu road, foundation is mated with pedicle screw the 3rd thread segment; 6, take out tapping rod member, pedicle screw, upper nail device are enclosed within on guide pin successively, and upper nail device is connected with pedicle screw para-position, inside and outside layer sleeve is fixed together by lockable mechanism, synchronous inside and outside layer sleeve rotates pedicle screw in the lump, the 4th step reaming Gu road is carried out to tapping, and along with the 3rd thread segment that gos deep into of tapping starts to compress bottom, Dao Gu road, tapping completes; Now untie lockable mechanism, rotate separately outer layer sleeve, make nut synchronous rotary, nut is passed forward along the screw thread of the 4th thread segment, and along with the carrying out of rotary manipulation, nut will be to zygapophysial joints; Because the 3rd thread segment is larger than the first thread segment external diameter, so herein after tapping be threaded can be more firm; The 4th thread segment is provided with the shallow thread of interruption, can prevent that substance in vivo is trapped in this thread segment, does not so also have the precession operation that retentate affects nut; The 4th thread segment is also deep thread, and the rigidity of whole screw can be influenced, so four thread segments adopt shallow thread; 7, nail device and dilator in taking-up, carry out bandage after operation processing.Upper nail device is only that para-position is connected with pedicle screw, in side direction, by corresponding hexagonal structure, realize and driving, axially, be because upper nail device is exerted pressure and realized the transmission of a directions to pedicle screw, if oppositely mention nail device, upper nail device can be at once separated with pedicle screw.

Accompanying drawing explanation

Fig. 1 is the structural representation of inner core corresponding with location sheath pipe in this utility model.

Fig. 2 locates sheath tubular construction schematic diagram in this utility model.

Fig. 3 is the structural representation of soft tissue expander in this utility model.

Fig. 4 is the fan-shaped impeller structure schematic diagram of soft tissue expander in this utility model.

Fig. 5 is the top view of pedicle screw nut in this utility model.

Fig. 6 is the fit structure schematic diagram of pedicle screw and human vertebrae in this utility model.

The specific embodiment

As shown in Figures 1 to 6, combined type percutaneous articular process cervical arc root screw internal fixing system, comprise location sheath pipe 2 and corresponding inner core 1 for determining angle of pedicle screw and body surface position, for determining, put the nail degree of depth guide pin, for expanding body surface, put the dilator of nail passage, for boring medical hollow drill and drilling tool, tapping screw rod, upper nail device and the pedicle screw of bone;

Wherein dilator comprises that the first long tube 3 manages 4 in 4, the second and be positioned on the first long tube 3 by lock pin 5 with being socketed in to manage in second outside the first long tube 3; Described dilator is provided with for dilator being shelved on to the fan-shaped leaf 6 of body surface, and this fan-shaped leaf 6 is slidably matched and is formed by some sector elements 7;

For a person skilled in the art; do not departing under the prerequisite of this utility model structure; can also make some distortion and improvement, as these also should be considered as protection domain of the present utility model, these can not affect effect and practical applicability that this utility model is implemented.

Claims

1. combined type percutaneous articular process cervical arc root screw internal fixing system, is characterized in that: comprise location sheath pipe and corresponding inner core for determining angle of pedicle screw and body surface position, for determining, put the nail degree of depth guide pin, for expanding body surface, put the dilator of nail passage, for boring medical hollow drill and drilling tool, tapping screw rod, upper nail device and the pedicle screw of bone;