CN212395147U - Slidable and self-locking atlantoaxial intervertebral fusion cage - Google Patents
Slidable and self-locking atlantoaxial intervertebral fusion cage Download PDFInfo
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- CN212395147U CN212395147U CN201922081786.5U CN201922081786U CN212395147U CN 212395147 U CN212395147 U CN 212395147U CN 201922081786 U CN201922081786 U CN 201922081786U CN 212395147 U CN212395147 U CN 212395147U
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- atlantoaxial
- sliding sheet
- wedge
- sliding
- shaped supporting
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- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 5
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- Surgical Instruments (AREA)
Abstract
The utility model provides a slidable and self-locking atlantoaxial intervertebral fusion cage, which comprises an upper sliding sheet component, a lower sliding sheet component and a wedge-shaped supporting block supporting the upper sliding sheet component and the lower sliding sheet component; the upper sliding sheet part and the lower sliding sheet part are connected in a sliding mode; the wedge-shaped supporting block is arranged between the upper slider part and the lower slider part. The fusion cage overcomes the defects of the traditional atlantoaxial intervertebral fusion cage, fully considers the operation access and clinical operation, and is composed of two prosthesis parts which can slide relatively, and is provided with a wedge-shaped supporting block, so that the fusion cage is convenient to support the atlantoaxial and can be locked at the same time, and the stability of the atlantoaxial is ensured.
Description
Technical Field
The utility model belongs to the technical field of medical false body manufacturing, in particular to a slidable and self-locking atlantoaxial intervertebral fusion cage.
Background
The atlantoaxial is located in the skull neck transition part, the part is deep, the anatomy is complex, the function is important, the structural stability mainly depends on the integrity of the osseous structure of the atlantoaxial and the continuity of ligament structures such as transverse ligament and winged ligament which are located behind the dentate process, the surgical treatment of the atlantoaxial dislocation is complex and troublesome, and the atlantoaxial dislocation is one of the difficulties of spinal surgery. Atlantoaxial dislocation or instability is common in clinic, has more causes including trauma, inflammation, congenital malformation, degeneration, tumor, iatrogenic factors and the like, and needs timely surgery to relieve the compression of spinal cord or the risk of potential nerve injury so as to avoid life threatening. The posterior internal fixation technology has the advantages of clear operation exposure visual field, wide adaptation, stable biomechanical performance, high fusion rate, low occurrence rate of operation complications and the like, and is the main method for treating atlantoaxial dislocation at present.
The atlantoaxial pedicle screw fixing system has wider clinical adaptation, excellent biomechanical property and less surgical bleeding, can avoid stimulation to C2 nerve roots, and is one of the most common surgical methods for posterior superior cervical vertebra fixation. The surgery often requires the ilium to be implanted into the atlantoaxial intervertebral joint to promote the bony fusion of the atlantoaxial intervertebral joint, thereby ensuring the long-term stability of the surgical site. Although the subsequent atlantoaxial restoration under the pressurization of the nail stick is not affected after the iliac granules are implanted, some disadvantages also exist: (1) the patient often needs to take the ilium from the body, so that an operation incision is added, and the wound is large; (2) the implanted ilium particles can only play a role in promoting local osseous fusion, and the supporting effect is difficult to achieve. In order to solve the defects, a plurality of scholars are dedicated to the development of the atlantoaxial intervertebral fusion device, but all the existing prostheses have the defect of influencing the further reduction operation of the atlantoaxial after implantation, so the prostheses are not clinically popularized. In conclusion, the development of the novel atlantoaxial intervertebral fusion device which does not affect the atlantoaxial restoration operation after implantation and can reconstruct the stability of the atlantoaxial has very important clinical significance.
Disclosure of Invention
The utility model provides a slidable reaches from locking-type atlantoaxial interbody fusion cage, it has overcome the shortcoming of traditional atlantoaxial interbody fusion cage, fully considers operation approach and clinical operation, and this fusion cage has two parts slidable relative prosthesis to constitute to set up the wedge supporting shoe, make the fusion cage be convenient for support the atlantoaxial, can lock simultaneously, guarantee the stability of atlantoaxial.
The utility model discloses realize above-mentioned purpose and adopt following technical scheme:
a slidable and self-locking atlantoaxial intervertebral fusion cage comprises an upper sliding sheet component, a lower sliding sheet component and a wedge-shaped supporting block for supporting the upper sliding sheet component and the lower sliding sheet component; the upper sliding sheet part and the lower sliding sheet part are connected in a sliding mode; the wedge-shaped supporting block is arranged between the upper slider part and the lower slider part.
The upper slider part and the lower slider part comprise sliders, and encircling arms are arranged on two sides of the sliders corresponding to the lower slider part; the embracing arm embraces the upper slide piece part to enable the upper slide piece part to slide in the upper slide piece part.
The encircling arm comprises two U-shaped sliding grooves arranged on two sides of the head end of the sliding block of the lower sliding block component; the inner wall of the encircling arm is provided with a sawtooth structure, and the sawtooth structure is arranged opposite to the sliding block corresponding to the lower sliding block part; two sides of the upper sliding sheet part are respectively provided with a protruding outer edge, the outer edges correspond to the encircling arms, and the outer edges are also provided with sawtooth structures; the sawtooth structures on the outer edge correspond to the sawtooth structures on the encircling arm.
The tail part of the sliding block corresponding to the upper sliding piece part is also provided with a sliding limiting block for carrying out fiber on the encircling arm.
The middle of the contact surface of the sliding blocks corresponding to the upper sliding sheet part and the lower sliding sheet part is provided with a groove for accommodating a wedge-shaped supporting block, and the wedge-shaped supporting block is inserted into the groove to support the sliding blocks corresponding to the upper sliding sheet part and the lower sliding sheet part.
The height of the tail end of the wedge-shaped supporting block is slightly smaller than the sum of the depths of the grooves of the upper and lower sliding sheet parts, and the height of the head end of the wedge-shaped supporting block is larger than the sum of the depths of the two grooves, so that the upper and lower sliding sheet parts are extruded and separated after the wedge-shaped supporting block is implanted, the encircling arm is locked with the outer edge, and the upper and lower sliding sheet parts are prevented from; the head end of the wedge-shaped supporting block is provided with a cylindrical clamping groove, so that clamping and implantation in the operation are facilitated.
The afterbody of the slider that upper slide piece part and lower slide piece part correspond all be equipped with anti-skidding slot, the direction perpendicular to upper slide piece part and the mutual gliding direction of lower slide piece part of anti-skidding slot.
The top of the sliding block corresponding to the upper sliding sheet component and the bottom of the sliding block corresponding to the lower sliding sheet component are respectively provided with an arched dome and a odontoid process, and the arched dome is attached to a depression on the atlantoaxial intervertebral joint surface; the tooth processes are arranged on two sides of the contact surface of the sliding block and the joint surface, and the tips of the tooth processes face outwards.
The upper slider part, the lower slider part and the wedge-shaped supporting block are integrally formed; the upper sliding sheet part and the lower sliding sheet part are made of medical titanium alloy materials, and the wedge-shaped supporting block is made of polyether-ether-ketone or polyethylene materials.
The contact surfaces of the upper sliding sheet part and the lower sliding sheet part with surrounding bone are all provided with hydroxyapatite coatings or microporous structures, and the parts close to soft tissues such as blood vessels and the like are all subjected to smoothing treatment.
The utility model adopts the above technical scheme following beneficial effect has:
slidable, from locking-type atlantoaxial intervertebral joint fusion ware overcome the shortcoming of traditional atlantoaxial intervertebral fusion ware, fully consider operation access and clinical operation, provide a slidable, from locking-type atlantoaxial intervertebral joint fusion ware. The prosthesis fully considers the operation flow and the local anatomical characteristics of the atlantoaxial. The contact surface of the prosthesis and the atlantoaxial intervertebral joint is provided with an arched dome so as to be anatomically attached with the prosthesis; the odontoid process and the anti-slip groove can lead the upper and lower slip sheet parts to be tightly fixed with the atlantoaxial joint surface, thereby preventing the displacement of the prosthesis and avoiding the compression of the spinal cord or blood vessels.
Upper and lower gleitbretter part can slide each other, do not influence extensive region axis operation that resets after implanting, can be that upper and lower gleitbretter part locks mutually after the wedge supporting shoe is implanted, avoid sliding once more, guaranteed the stability at operation position.
The contact surface of the prosthesis and the sclerotin is provided with a hydroxyapatite coating or a microporous structure, so that the osseous fusion is convenient.
Drawings
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a schematic diagram of the front end of the present invention.
Fig. 3 is a side view of the present invention.
Fig. 4 is a top view of the present invention.
Fig. 5 is a bottom view of the present invention.
Fig. 6 is a cross-sectional view of the present invention.
FIG. 7 is a schematic view of the upper slider member.
FIG. 8 is a schematic view of the lower slider part.
FIG. 9 is a schematic view of a wedge-shaped support block.
Figure 10 is a three-dimensional model of the atlantoaxial intervertebral joint with the new prosthesis implanted.
In the figure, 1 is an upper slide piece part, 2 is a lower slide piece part, 3 is a wedge-shaped supporting block, 4 slide blocks, 5 is an outer edge, 6 is a slide limiting block, 7 is an encircling arm, 8 is an arc-shaped protrusion, 9 is an odontoid process, 10 is an anti-skidding groove, 11 is a groove, 12 is a sawtooth structure, 13 is a tail end, 14 is a head end, 15 is a cylindrical clamping groove, H is the height of the wedge-shaped supporting block, and D is the groove depth of the upper and lower slide piece parts.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1-8, the slidable and self-locking atlantoaxial intervertebral fusion cage of the present invention comprises an upper slide member 1, a lower slide member 2 and a wedge-shaped support block 3.
The upper sliding sheet part 1 consists of a sliding block 4, an outer edge 5 and a sliding limiting block 6; the lower slider part 2 is composed of a slider 4 and an encircling arm 7. The contact surface of the sliding block 4 and the atlantoaxial intervertebral joint is provided with an arched dome 8, a dentate process 9 and an anti-slip groove 10, and the middle of the contact surface of the two sliding blocks is provided with a groove 11 for accommodating the wedge-shaped supporting block. The outer edge 5 is provided with a sawtooth structure 12 which is matched with the sawtooth structure 12 on the encircling arm 7 of the lower sliding sheet part 2, and after the wedge-shaped supporting block 3 is planted into the groove 11, the upper sliding sheet part and the lower sliding sheet part can be extruded and separated, so that the encircling arm 7 is locked with the sawtooth structure 12 on the outer edge 5, and the upper sliding sheet part and the lower sliding sheet part are prevented from sliding again. The sliding limiting block 6 is positioned at the tail part of the outer edge 5, and when the upper sliding sheet and the lower sliding sheet slide to a certain distance, the encircling arm 7 can abut against the sliding limiting block 6, so that the upper sliding sheet part and the lower sliding sheet part are limited to excessively slide and be separated.
The encircling arm 7 is positioned on two sides of the head end of the sliding block 4, the encircling arm 7 is of a U-shaped structure, can just encircle the outer edge 5 on the upper sliding sheet part 1, is also provided with a sawtooth structure 12, and is just matched with the sawtooth structure 12 on the outer edge 5 of the upper sliding sheet part 1. The arched dome 8 is attached to the depression on the atlantoaxial intervertebral joint surface, so that the contact surface of the prosthesis and the bony structure is increased, and stress concentration is avoided.
The described tooth processes 9 are positioned on two sides of contact surface of slide block and articular surface, and their tooth tips are directed toward outside, after the prosthesis is implanted, it can be penetrated into the articular surface so as to prevent the prosthesis from shifting toward two sides. The anti-skid groove 10 is positioned at the tail part of the sliding block, and the direction of the groove can just prevent the upper sliding sheet part and the lower sliding sheet part from moving forwards, so that the damage to structures such as a trachea, an esophagus and the like caused by the forward movement of the implanted prosthesis is avoided.
Referring to fig. 9, the height H of the tail end 13 of the wedge-shaped supporting block 3 is slightly smaller than the sum of the depths D of the grooves 11 of the upper and lower sliding sheet parts, and the height H of the head end 14 of the wedge-shaped supporting block is larger than the sum of the depths of the two grooves 11, so that the upper and lower sliding sheet parts are extruded and separated after the wedge-shaped supporting block is implanted, the encircling arm is locked with the outer edge, and the upper and lower sliding sheet parts are prevented. The head end 14 of the wedge-shaped supporting block is provided with a cylindrical clamping groove 15, so that clamping and implantation in the operation are facilitated.
The upper sliding sheet part, the lower sliding sheet part and the wedge-shaped supporting block are integrally formed. The upper slider part and the lower slider part are made of medical titanium alloy materials, and the wedge-shaped supporting block is made of polyether-ether-ketone or polyethylene materials. The contact surfaces of the upper slide piece part and the lower slide piece part with the surrounding bone are provided with hydroxyapatite coatings or microporous structures, and the parts close to soft tissues such as blood vessels are subjected to smoothing treatment.
Referring to fig. 10, the assembly relationship of the slidable self-locking atlantoaxial intervertebral joint fusion device of the present invention is as follows: before operation, according to CT scanning and three-dimensional reconstruction of the atlantoaxial of a patient, relevant anatomical parameters of the atlantoaxial intervertebral joint are collected, and a prosthesis with a proper model is selected according to the size of a focus. The upper and lower sliding sheet parts are assembled and implanted into the atlantoaxial intervertebral joint. Then the atlantoaxial joint is reset under traction, the wedge-shaped supporting block is implanted into the groove after the reset is observed well under the C-arm fluoroscopy, and the upper sliding sheet and the lower sliding sheet are locked.
In a word, the slidable self-locking atlantoaxial intervertebral joint fusion cage comprises an upper sliding sheet part, a lower sliding sheet part and a wedge-shaped supporting block. The upper sliding sheet part consists of a sliding block, an outer edge and a sliding limiting block. The contact surface of the sliding block and the atlantoaxial articular surface is provided with an arched dome, a odontoid process and an anti-skid groove; the outer edge is provided with a sawtooth structure; the sliding limiting block is positioned at the tail part of the outer edge and mainly limits the upper sliding piece part and the lower sliding piece part to excessively slide and be separated. The lower slider part consists of a slider and an encircling arm. The contact surface of the sliding block and the articulation surface on the axis is provided with an arched dome, a tooth projection and an anti-skid groove; the encircling arm is positioned at two sides of the head end of the sliding block, and is also provided with a sawtooth structure which is just matched and assembled with the sawtooth structure on the outer edge of the upper sliding sheet. The middle of the contact surface of the two sliding blocks is provided with a groove which mainly accommodates the entering of the wedge-shaped supporting block. The whole prosthesis upper and lower sliding sheet components are integrally formed by titanium alloy materials, a hydroxyapatite coating or a microporous structure is arranged at the contact part with the bone surface, and the wedge-shaped supporting block is integrally formed by polyethylene or polyether-ether-ketone materials. The utility model discloses mainly used extensive region axis joint dislocation, realization extensive region axis joint that can be better resets and promotes extensive region intervertebral joint osseous fusion to rebuild the stability of extensive region axis.
Claims (10)
1. The utility model provides a slidable and from locking-type atlantoaxial intervertebral fusion ware which characterized in that: the wedge-shaped supporting block comprises an upper slider part, a lower slider part and a wedge-shaped supporting block for supporting the upper slider part and the lower slider part; the upper sliding sheet part and the lower sliding sheet part are connected in a sliding mode; the wedge-shaped supporting block is arranged between the upper slider part and the lower slider part.
2. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 1, wherein: the upper slider part and the lower slider part comprise sliders, and encircling arms are arranged on two sides of the sliders corresponding to the lower slider part; the embracing arm embraces the upper slide piece part to enable the upper slide piece part to slide in the upper slide piece part.
3. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 2, wherein: the encircling arm comprises two U-shaped sliding grooves arranged on two sides of the head end of the sliding block of the lower sliding block component; the inner wall of the encircling arm is provided with a sawtooth structure, and the sawtooth structure is arranged opposite to the sliding block corresponding to the lower sliding block part; two sides of the upper sliding sheet part are respectively provided with a protruding outer edge, the outer edges correspond to the encircling arms, and the outer edges are also provided with sawtooth structures; the sawtooth structures on the outer edge correspond to the sawtooth structures on the encircling arm.
4. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 3, wherein: the tail part of the sliding block corresponding to the upper sliding piece part is also provided with a sliding limiting block for carrying out fiber on the encircling arm.
5. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 4, wherein: the middle of the contact surface of the sliding blocks corresponding to the upper sliding sheet part and the lower sliding sheet part is provided with a groove for accommodating a wedge-shaped supporting block, and the wedge-shaped supporting block is inserted into the groove to support the sliding blocks corresponding to the upper sliding sheet part and the lower sliding sheet part.
6. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 5, wherein: the height of the tail end of the wedge-shaped supporting block is slightly smaller than the sum of the depths of the grooves of the upper and lower sliding sheet parts, and the height of the head end of the wedge-shaped supporting block is larger than the sum of the depths of the two grooves, so that the upper and lower sliding sheet parts are extruded and separated after the wedge-shaped supporting block is implanted, the encircling arm is locked with the outer edge, and the upper and lower sliding sheet parts are prevented from; the head end of the wedge-shaped supporting block is provided with a cylindrical clamping groove, so that clamping and implantation in the operation are facilitated.
7. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 6, wherein: the afterbody of the slider that upper slide piece part and lower slide piece part correspond all be equipped with anti-skidding slot, the direction perpendicular to upper slide piece part and the mutual gliding direction of lower slide piece part of anti-skidding slot.
8. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 7, wherein: the top of the sliding block corresponding to the upper sliding sheet component and the bottom of the sliding block corresponding to the lower sliding sheet component are respectively provided with an arched dome and a odontoid process, and the arched dome is attached to a depression on the atlantoaxial intervertebral joint surface; the tooth processes are arranged on two sides of the contact surface of the sliding block and the joint surface, and the tips of the tooth processes face outwards.
9. The slidable and self-locking atlantoaxial intervertebral fusion cage of claim 8, wherein: the upper slider part, the lower slider part and the wedge-shaped supporting block are integrally formed; the upper sliding sheet part and the lower sliding sheet part are made of medical titanium alloy materials, and the wedge-shaped supporting block is made of polyether-ether-ketone or polyethylene materials.
10. The slidable and self-locking atlantoaxial intervertebral fusion device of claim 9, wherein: the contact surfaces of the upper sliding sheet part and the lower sliding sheet part with surrounding bone are all provided with hydroxyapatite coatings or microporous structures, and the parts close to soft tissues such as blood vessels and the like are all subjected to smoothing treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081786.5U CN212395147U (en) | 2019-11-28 | 2019-11-28 | Slidable and self-locking atlantoaxial intervertebral fusion cage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081786.5U CN212395147U (en) | 2019-11-28 | 2019-11-28 | Slidable and self-locking atlantoaxial intervertebral fusion cage |
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| CN212395147U true CN212395147U (en) | 2021-01-26 |
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| CN201922081786.5U Expired - Fee Related CN212395147U (en) | 2019-11-28 | 2019-11-28 | Slidable and self-locking atlantoaxial intervertebral fusion cage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112842635A (en) * | 2019-11-28 | 2021-05-28 | 刘俭涛 | Slidable and self-locking atlantoaxial intervertebral fusion cage |
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2019
- 2019-11-28 CN CN201922081786.5U patent/CN212395147U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112842635A (en) * | 2019-11-28 | 2021-05-28 | 刘俭涛 | Slidable and self-locking atlantoaxial intervertebral fusion cage |
| CN112842635B (en) * | 2019-11-28 | 2023-10-20 | 刘俭涛 | Slidable and self-locking atlantoaxial interbody fusion cage |
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Granted publication date: 20210126 |