CN209004168U - Pedicle Screw Placement in Lower Cervical fixes device - Google Patents

Abstract

The utility model discloses the fixed devices of Pedicle Screw Placement in Lower Cervical, including a horizontal company and two Universal pedicle screws, the Universal pedicle screw includes screw body, attachment base and locking nut, the attachment base is rotatably connected at the top of the screw body, groove is equipped at the top of the attachment base, the groove inner wall is equipped with the internal screw thread to match with the external screw thread of the locking nut, radially front and back penetrates through the attachment base and forms two U-shaped openings the groove, horizontal omega structure is linked as it is characterized by: described, and two Universal pedicle screws are detachably connected to the both ends of the horizontal company respectively.Two pedicle screws are fastened together by the utility model by the horizontal company of omega structure, are made the convex portion and spinous process Corresponding matching of horizontal company, are played good fixed effect.

Description

Pedicle Screw Placement in Lower Cervical fixes device

Technical field

The utility model relates to pedicle screw fixation device fields, and in particular to the fixed device of Pedicle Screw Placement in Lower Cervical.

Background technique

To cure the loose patient of cervical vertebra or fracture patient, it will usually carry out pedicle of vertebral arch screw tack operation, this hand to it Art is mainly that the vertebra of loose vertebra or fracture is tightened by implantation pedicle screw.Current pedicle of vertebral arch screw tack operation, After being fixed usually using pedicle screw to patient's progress vertebra, with regard to not consolidated further to the pedicle screw after fixation It is fixed, and this will will lead to the problem of deuterogenesis's pedicle screw is subjected to displacement or loosens, and be unfavorable for the efficient rehabilitation of patient, It is badly in need of solving.

Utility model content

It is universal the technical problem to be solved by the utility model is to provide can effectively fix in view of the deficiency of background technique Pedicle screw and the fixed device of the Pedicle Screw Placement in Lower Cervical for being close to spinous process.

To realize the above-mentioned technical purpose, the utility model provides following technical solution:

Pedicle Screw Placement in Lower Cervical fixes device, including a horizontal company and two Universal pedicle screws, the universal vertebral arch Root screw includes screw body, attachment base and locking nut, and the attachment base is rotatably connected at the top of the screw body, described Groove is equipped at the top of attachment base, the groove inner wall is equipped with the internal screw thread to match with the external screw thread of the locking nut, described Radially front and back penetrates through the attachment base and forms two U-shaped openings groove, it is characterised in that: it is described it is horizontal be linked as omega structure, and Two Universal pedicle screws are detachably connected to the both ends of the horizontal company respectively.

The end cross of the horizontal company pass through the U-shaped opening be placed in the groove, and by the locking nut into Row is fixed.

The diameter of the horizontal company is identical as the internal diameter of the U-shaped opening.

The screw body is respectively equipped with adjacent close thread segment and thin thread segment, the spiral shell of the close thread segment from up to down Away from the screw pitch for being less than the thin thread segment.

The length of the screw body is 16mm-32mm, and the length of the close thread segment is 5mm-8mm.

The screw body is equipped with pilot hole up and down along axle center.

The outer diameter of the screw body is set as 3.5mm, and the internal diameter of the pilot hole is set as 1.5mm.

The Universal pedicle screw is made of titanium alloy material.

The horizontal company has plasticity.

After the above technical solution is adopted, the beneficial effects of the utility model are: can effectively fasten universal vertebra by horizontal company Nut screw thread, prevents it from loosening；Meanwhile the convex portion of horizontal company can also intend shape with spinous process size, with appropriate pressure abutting Spinous process can suitably remove part spinous process when necessary, and whole device and centrum is made to form a mass activity structure, avoid neck living Relative friction occurs between spinous process and device when dynamic, effectively improves the quality of operation.

Detailed description of the invention

The utility model has following attached drawing:

Fig. 1 is the schematic diagram of the utility model.

Specific embodiment

As shown in Figure 1, Pedicle Screw Placement in Lower Cervical fixes device, including a horizontal company 1 and two Universal pedicle screws 2, The effect of horizontal company 1 is that Universal pedicle screw 2 is fixed, and the Universal pedicle screw 2 includes screw body 21, connects Joint chair 22 and locking nut 23, the attachment base 22 are rotatably connected on 21 top of screw body, 22 top of attachment base Equipped with groove 221,221 inner wall of groove is equipped with the internal screw thread to match with the external screw thread of the locking nut 23, described recessed Radially front and back penetrates through the attachment base and forms two U-shaped openings slot 221, and the horizontal company 1 is omega structure and has certain Plasticity can avoid the attachment base 22 and spiral shell of Universal pedicle screw 2 after the horizontal company 1 of omega structure connects Universal pedicle screw 2 It is excessive to follow closely 21 row angle of ontology, and plasticity guarantees that horizontal company 1 is adjusted correspondingly with bending machine, when adjustment, horizontal company 1 is with spinous process Size intends shape, and is close to spinous process with appropriate pressure, can suitably remove part spinous process when necessary, and whole device and centrum is made to form one A mass activity structure avoids that relative friction occurs when neck activity between spinous process and device, and when adjustment will also avoid horizontal company 1 Convex portion is excessive to touch patient's nape, influences the comfort of patient.Two Universal pedicle screws 2 are detachable respectively Ground is connected to the both ends of the horizontal company 1, and specific connection type is as follows: the end cross of the horizontal company 1 passes through the U-shaped opening simultaneously It is placed in the groove 221, and fixation is tightened by the locking nut 23.To be securely attached to horizontal company 1 in attachment base 22 It does not shake, the diameter of the horizontal company 1 is identical as the internal diameter of the U-shaped opening.

In order to further increase the using effect of Universal pedicle screw 2, the Universal pedicle screw 2 is by titanium alloy material Material is made.The screw body 21 is respectively equipped with adjacent close thread segment 211 and thin thread segment 212, the close spiral shell from up to down The screw pitch of line section 211 is less than the screw pitch of the thin thread segment 212, wherein and the length of the screw body 21 is 16mm-32mm, And every difference 2mm is set as a kind of specification, the length of the close thread segment 211 is 5mm-8mm, and optimum length is 5mm.It is this double So that Universal pedicle screw 2 is after being screwed into and breaking through fracture line, the Contralateral fracture broken ends of fractured bone is further squeezed for the design of thread segment Pressure is shunk, and is made Contralateral fracture broken ends of fractured bone tight collapse together, is played good fixed function；The screw body 21 is set along axle center There is pilot hole up and down, the effect of pilot hole is to be inserted into guide pin, is screwed into Universal pedicle screw 2 along guide pin specified Position guarantees that the direction that it is screwed into will not occur significantly to deviate, and the outer diameter of the screw body 21 is set as 3.5mm, described to lead 1.5mm is set as to the internal diameter in hole.

In use, two Universal pedicle screws 2 to be first sequentially screwed into the designated position of patient's neck, then according to universal The angle of pedicle screw 2 and the size of spinous process, the radian of the horizontal company 1 of appropriate adjustment omega structure wear at the both ends of horizontal company 1 respectively It crosses in the groove 221 of attachment base 22, and is fixed by locking nut 23.

To sum up, this product can make Hangman fracture Posterior fixation, form 3 D stereo tower structure, increase at once Stability is more advantageous to the healing of fracture.

Claims (9)

1. Pedicle Screw Placement in Lower Cervical fixes device, including a horizontal company and two Universal pedicle screws, the universal pedicle of vertebral arch Screw includes screw body, attachment base and locking nut, and the attachment base is rotatably connected at the top of the screw body, the company Groove is equipped at the top of joint chair, the groove inner wall is equipped with the internal screw thread to match with the external screw thread of the locking nut, described recessed Radially front and back penetrates through the attachment base and forms two U-shaped openings slot, it is characterised in that: described horizontal to be linked as omega structure, and two A Universal pedicle screw is detachably connected to the both ends of the horizontal company respectively.

2. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 1, it is characterised in that: the end cross of the horizontal company It is placed in the groove across the U-shaped opening, and is fixed by the locking nut.

3. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 2, it is characterised in that: the diameter of the horizontal company and institute The internal diameter for stating U-shaped opening is identical.

4. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 1, it is characterised in that: the screw body on to Under be respectively equipped with adjacent close thread segment and thin thread segment, the screw pitch of the close thread segment is less than the screw pitch of the thin thread segment.

5. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 4, it is characterised in that: the length of the screw body For 16mm-32mm, the length of the close thread segment is 5mm-8mm.

6. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 4, it is characterised in that: the screw body is along axle center Equipped with pilot hole up and down.

7. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 6, it is characterised in that: the outer diameter of the screw body It is set as 3.5mm, the internal diameter of the pilot hole is set as 1.5mm.

8. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 1, it is characterised in that: the Universal pedicle screw It is made of titanium alloy material.

9. the fixed device of Pedicle Screw Placement in Lower Cervical according to claim 1, it is characterised in that: the horizontal company has plastic Property.