阅读说明：本技术 一种颈椎前路斜向横形固定钢板 (Cervical vertebra anterior oblique transverse fixing steel plate ) 是由 杨毅 刘浩 黄诚一 马立泰 于 2019-10-29 设计创作，主要内容包括：本发明公开一种颈椎前路斜向横形固定钢板,包括主体板和副板,主体板板身中部设置有若干通孔,主体板板身上下边沿与中部通孔之间各设有一个螺纹孔,所述副板至少有4块,主体板板身左右两侧分别至少设置2块副板,所述副板均与主体板铰接,所述副板板身均设置有一个螺孔,所述副板内侧均设置有一个尖刺,所述尖刺长度范围为2mm～3mm,所述主体板板身上、下部宽度相同,主体板板身中部相比上、下部较窄,主体板由钛合金材料构成,所述副板由钛合金材料构成。本发明结构简单、操作便捷,相较于传统的颈椎前路固定钢板整体整体结构更稳定,固定强度更强。(The invention discloses a cervical vertebra anterior oblique transverse fixing steel plate which comprises a main body plate and auxiliary plates, wherein a plurality of through holes are formed in the middle of a plate body of the main body plate, threaded holes are formed between the upper edge and the lower edge of the plate body of the main body plate and the through holes in the middle of the plate body of the main body plate, at least 4 auxiliary plates are arranged on the left side and the right side of the plate body of the main body plate respectively, the auxiliary plates are hinged with the main body plate, a threaded hole is formed in each auxiliary plate, a spine is arranged on the inner side of each auxiliary plate, the length range of the spine is 2-3 mm, the width of the upper part and the width of the lower part of the plate body of the main body plate are the same, the upper part and the lower part of the plate body of the main body plate are narrower than those of. The cervical vertebra anterior fixing steel plate is simple in structure, convenient and fast to operate, more stable in overall structure and higher in fixing strength compared with a traditional cervical vertebra anterior fixing steel plate.)

1. The utility model provides a fixed steel sheet of horizontal shape of anterior cervical vertebra slant which characterized in that: including main part board and subplate, main part board body middle part is provided with a plurality of through-holes, respectively is equipped with a screw hole between border and the middle part through-hole about the main part board body, the subplate has 4 at least, and the main part board body left and right sides sets up 2 subplates respectively at least, the subplate all is articulated with the main part board, the subplate body all is provided with a screw.

2. The anterior cervical oblique transverse fixation plate of claim 1, wherein: the inner sides of the auxiliary plates are provided with a spine.

3. The anterior cervical oblique transverse fixation plate of claim 2, wherein: the length range of the spine is 2 mm-3 mm.

4. The anterior cervical oblique transverse fixation plate of claim 1, wherein: the main body plate is made of a titanium alloy material, and the auxiliary plate is made of a titanium alloy material.

5. The anterior cervical oblique transverse fixation plate of claim 1, wherein: the through holes are arranged in a matrix shape and are circular.

6. The anterior cervical oblique transverse fixation plate of claim 1, wherein: the width of the upper part and the lower part of the main body board body are the same, and the middle part of the main body board body is narrower than the upper part and the lower part.

7. The anterior cervical oblique transverse fixation plate of claim 1, wherein: the auxiliary plate has 4, is first auxiliary plate, second auxiliary plate, third auxiliary plate and fourth auxiliary plate respectively.

8. The anterior cervical oblique transverse fixation plate of claim 7, wherein: the screw has 4, is first screw, second screw, third screw and fourth screw respectively.

9. The anterior cervical oblique transverse fixation plate of claim 8, wherein: the first screw is located first auxiliary plate body the latter half, the second screw is located second auxiliary plate body the first half, the third screw is located third auxiliary plate the first half, the fourth screw is located fourth auxiliary plate the latter half.

10. The anterior cervical oblique transverse fixation plate of claim 9, wherein: the first subplate is located the left side of main part board body first half, the second subplate is located the right side of main part board body first half, the third subplate is located the left side of main part board body second half, the fourth subplate is located the right side of main part board body second half.

Technical Field

The invention relates to the field of medical instruments, in particular to a cervical vertebra anterior oblique transverse fixing steel plate.

Background

The anterior cervical steel plate fixation is a common internal fixation instrument for anterior cervical fusion, after intervertebral disc and anterior longitudinal ligament are removed, pressure reduction and bone grafting bed preparation are completed, a fusion device is implanted, and finally a steel plate is arranged to tighten screws.

The fusion device mainly plays a supporting role, and the steel plate is used as a bone fracture plate and mainly plays a role in stabilizing and fixing.

The cervical vertebrae of the human body still move after the operation, including several movements of forward flexion, backward extension, left and right lateral flexion and left and right rotation. If these movements are repeated over a long period of time, the steel plate may loosen and the screw may be withdrawn.

It should be noted that the pullout resistance of a screw is related to the screw thread, the depth of the screw channel, and the strength of the bone (e.g., cancellous, cortical, osteoporotic bone)

In the movement of the cervical vertebra of a human body, the fusion device is supported when the cervical vertebra is bent forwards, the front part mainly has pressure, the fusion device is very resistant to pressure, the rear ligament muscle joint composite structure part has tension, and the tension structure is very strong because the rear part is not operated, so the cervical vertebra is very stable.

When the cervical vertebra stretches backwards, the tension is opposite, the front tends to stretch, the pressure is at the back, the connecting force between the adjacent vertebral bodies is lost due to the fact that the ligament and the intervertebral disc in the front are cut off, the cervical vertebra is connected with the screw by the steel plate completely, the cervical vertebra is not as stable as the stretching backwards, the steel plate can generate the tension, and the screw can have a pull-out force. How to improve steel sheet screw fixation strength, prevent that the screw from extracting, the tension structural strength in the place ahead when increasing the motion of stretching backward is a problem that exists at present.

Disclosure of Invention

The invention aims to provide the cervical vertebra anterior oblique transverse fixing steel plate which is simple in structure, stable in whole and strong in fixing strength.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

the utility model provides a fixed steel sheet of cervical vertebra front approach slant horizontal shape, includes main part board and subplate, and main part board body middle part is provided with a plurality of through-holes, respectively is equipped with a screw hole between border and the middle part through-hole about the main part board body, the subplate has 4 at least, and the main part board body left and right sides sets up 2 subplates respectively at least, the subplate all articulates with the main part board, the subplate body all is provided with a screw.

Preferably, the inner sides of the auxiliary plates are provided with a spike.

Furthermore, the length range of the spine is 2 mm-3 mm.

Preferably, the main plate is made of a titanium alloy material, and the sub-plate is made of a titanium alloy material.

Preferably, the through holes are arranged in a matrix, and the through holes are circular.

Preferably, the width of the upper part and the lower part of the main body board body are the same, and the middle part of the main body board body is narrower than the upper part and the lower part.

Preferably, the number of the auxiliary plates is 4, and the auxiliary plates are respectively a first auxiliary plate, a second auxiliary plate, a third auxiliary plate and a fourth auxiliary plate.

Furthermore, there are 4 screw holes, be first screw hole, second screw hole, third screw hole and fourth screw hole respectively.

Further, first screw is located first auxiliary plate body the latter half, the second screw is located second auxiliary plate body the latter half, the third screw is located third auxiliary plate the upper half, the fourth screw is located fourth auxiliary plate the latter half.

Further, first subplate is located the main part body left side of half, the second subplate is located the main part body right side of half, the third subplate is located the left side of main part body the latter half, the fourth subplate is located the right side of main part body the latter half.

The invention has the following beneficial effects:

1. compared with the traditional anterior cervical fixing steel plate, the number of screws and the length of screw channels are increased, so that the overall stability is improved;

2. when in use, 2 oblique long screws penetrate through the two layers of hard cortical bones, so that the anti-pull-out force and the stability of the screws are improved;

3. the auxiliary plates arranged on the two sides of the main body plate increase the attaching area with vertebral bones to form an encircling effect, thereby increasing the stability;

4. the inner side of the auxiliary plate is provided with sharp spines which can pierce cortical bones when in use and can increase the tensile strength when the cervical vertebra steel plate is in contact with the cortical bones when being stretched;

5. although long screws penetrate through two layers of cortical bone obliquely in use, the spinal cord in the vertebral canal cannot be damaged;

6. the operation complexity and high risk of reverse pedicle screws in the past means are avoided, so that the risk of death of injured vertebral arteries is avoided;

7. the circular through-hole that a plurality of array that the mainboard middle part set up was arranged is keeping under the circumstances of fixed intensity, and the contact of intervertebral space bone grafting region and soft tissue around, thereby it promotes intervertebral fusion to do benefit to blood and supplies hematoma formation.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention in use.

In the figure: 1-main body plate, 3-through hole, 4-threaded hole, 6-spine, 7-long screw, 8-short screw, 9-vertebral body, 10-vertebral hole, 11-first subplate, 12-second subplate, 13-third subplate, 14-fourth subplate, 15-first screw hole, 16-second screw hole, 17-third screw hole and 18-fourth screw hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.

The utility model provides a fixed steel sheet of cervical vertebra front path slant horizontal shape, includes main part board 1 and subplate, and 1 board body middle part of main part board is provided with a plurality of through-holes 3, respectively is equipped with a screw hole 4 between border and the middle part through-hole 3 about 1 board body of main part board, the subplate has 4 at least, and 1 board body left and right sides of main part board set up 2 subplates respectively at least, the subplate all articulates with main part board 1, the subplate board body all is provided with a screw.

As shown in fig. 1 and 2, the widths of the upper and lower parts of the main body plate 1 are the same, the middle part of the main body plate 1 is narrower than the upper and lower parts, the through holes 3 are arranged in a matrix, the through holes 3 are circular, and there are 4 sub-plates, namely a first sub-plate 11, a second sub-plate 12, a third sub-plate 13 and a fourth sub-plate 14; the number of the screw holes is 4, and the screw holes are respectively a first screw hole 15, a second screw hole 16, a third screw hole 17 and a fourth screw hole 18; the first screw hole 15 is located first auxiliary plate 11 board body the latter half, the second screw hole 16 is located second auxiliary plate 12 board body first half, third screw hole 17 is located third auxiliary plate 13 first half, fourth screw hole 18 is located fourth auxiliary plate 14 the latter half.

The inner sides of the auxiliary plates are respectively provided with a spine 6, and the length range of the spine 6 is 2 mm-3 mm.

The main plate 1 is made of a titanium alloy material, and the auxiliary plate is made of a titanium alloy material.

When in use, as shown in figure 3, the auxiliary plates at the two sides of the main body plate 1 are clamped by a special tool, so that the spine 6 pierces into the cone; then, manually operating a long screw 7 with the diameter matched with the screw hole to penetrate into the cone 9 along a certain angle through the screw hole, and enabling the long screw 7 to penetrate through the cortical layer in front of the opposite side; finally, the short screw 8 with the diameter matched with the threaded hole is screwed into the cone 9 through the threaded hole, the length of the short screw 8 is limited, and the short screw cannot penetrate into the vertebral hole 10.

The positions of the tightened short screw 8, the tightened long screw 7, the main body plate 1 and the auxiliary plate are not changed, and the whole body is stably locked.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.