CN209916169U - Anterior cervical vertebra C2 and 3 eccentric nail plate placing fixing system - Google Patents
Anterior cervical vertebra C2 and 3 eccentric nail plate placing fixing system Download PDFInfo
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- CN209916169U CN209916169U CN201920245254.8U CN201920245254U CN209916169U CN 209916169 U CN209916169 U CN 209916169U CN 201920245254 U CN201920245254 U CN 201920245254U CN 209916169 U CN209916169 U CN 209916169U
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Abstract
The utility model relates to an anterior cervical spine C2, 3 eccentric nail plate fixing system of placing. Comprises a fixing plate which is in an L-shaped plate shape, and the inner side edge of the fixing plate is thinner than the outer side edge; the fixing plate is provided with a first group of nail holes and a second group of nail holes; the first group of nail holes consists of 3 circular holes, and the three holes are longitudinally arranged along the direction of the L-shaped long edge; the second group of nail holes are arranged in a shape like a Chinese character 'pin'; the inner edge transition part is in a shape of an oblique arc. The first group of nail holes are inclined holes, and the axis of the first group of nail holes inclines towards the direction of the inner edge of the top end of the fixing plate; the second group of nail holes are inclined holes, and the axis of the second group of nail holes inclines towards the direction of the inner side edge.
Description
Technical Field
The invention belongs to the technical field of medical instruments for orthopedic surgery in clinical medicine, and particularly relates to a fixing system for eccentrically placing nail plates for anterior cervical vertebrae C2 and 3.
Background
The anatomical structure in front of the cervical vertebra is complex, a plurality of important blood vessels, nerves and organs exist, and in the process of exposing the cervical vertebra through an anterior operation, the important structures need to be carefully identified and protected, so that clear exposure is realized through minimum tissue injury. The C2 structure is particularly special: the front edge of C2 gradually bulges downwards in an oblique way, and the tissue of the posterior pharyngeal wall in front is thin and has poor tolerance to traction stimulation.
When the conventional anterior cervical plating system is applied to the fusion of C2 and 3, there are some problems: 1) the midline structure is difficult to draw to the opposite side, the exposure is difficult, the screw nail placement to the opposite side of the incision is difficult, the operation is inconvenient, and if the full exposure is realized, the throat tissue can be obviously stimulated; 2) the fixed plate is placed in the center, and after being implanted, the fixed plate is easy to stimulate local structures, so that discomfort such as foreign body sensation of the throat, dysphagia and the like can be caused; 3) the fixing strength is relatively insufficient, and internal fixing failure caused by screw pulling out and cutting is easy to occur; 4) serious complications such as esophageal fistula easily occur when the midline structure is pulled vigorously for a long time.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to design an eccentric nail plate fixing system for anterior cervical vertebrae C2 and 3 to reduce the defects or complications.
The technical scheme is as follows:
an anterior cervical approach C2, 3 eccentric nail plate fixing system, which is characterized in that:
the fixing plate is in an L-shaped plate shape, and the inner side edge of the fixing plate is thinner than the outer side edge of the fixing plate;
the fixing plate is provided with a first group of nail holes and a second group of nail holes;
the first group of nail holes consists of 3 circular holes, and the three holes are longitudinally arranged along the direction of the L-shaped long edge;
the second group of nail holes are arranged in a shape like a Chinese character 'pin';
the inner edge transition part is in a shape of an oblique arc.
The first group of nail holes are inclined holes, and the axis of the first group of nail holes inclines towards the direction of the inner edge of the top end of the fixing plate;
the second group of nail holes are inclined holes, and the axis of the second group of nail holes inclines towards the direction of the inner side edge.
The anterior cervical approach C2, 3 eccentrically placed pegboard fixation system described above preferably: the top of the long edge of the fixing plate is in a pointed shape, the inclined edge and the long edge of the fixing plate form an included angle of 70-75 degrees, and the top of the pointed top is a round angle.
The anterior cervical approach C2, 3 eccentrically placed pegboard fixation system described above preferably: the implantation direction of the screw through the screw hole is an oblique opposite side and is parallel to the incision direction.
The anterior cervical approach C2, 3 eccentrically placed pegboard fixation system described above preferably: the fixing plate is of a plate-shaped structure made of titanium alloy or high polymer materials.
The anterior cervical approach C2, 3 eccentrically placed pegboard fixation system described above preferably: the high polymer material is polyether-ether-ketone or carbon fiber.
The axes of the first group of nail holes deviate from the normal of the fixing plate by 12-15 degrees.
The axes of the second group of nail holes deviate from the normal of the fixing plate by 14-17 degrees.
The advantages and effects are as follows:
1 the fixed plate is eccentrically arranged, so that the fixed plate is close to a zero incisura in the center of the front of the vertebral body, and the stimulation to the esophagus after the fixed plate is implanted is reduced, thereby reducing the incidence rate of throat discomfort after operation and improving the satisfaction rate of the operation.
2 the nail hole is the locking hole, and the nail board system becomes an organic whole after the screw is implanted, increases fixed strength, avoids the screw roll-off simultaneously.
The implantation direction of the 4 screw is an oblique opposite side and is approximately parallel to the incision direction, so that the traction to the midline visceral organs is small, and related complications are reduced.
5 the inner edge (close to the side of the midline) of the fixing plate is thinner and is in an oblique arc shape, so as to further reduce the incisura and reduce the stimulation to the tracheoesophageal; the outer edge of the fixing plate is thicker to increase the fixing strength.
Description of the drawings:
FIG. 1 is a schematic view of a fixing plate;
FIG. 2 is an enlarged view of the first set of holes;
FIG. 3 is an enlarged view of a second set of holes;
FIG. 4 is a schematic view of a first set of holes being slanted;
FIG. 5 is a schematic diagram of the second set of apertures being slanted.
The figure is marked with:
1 inner edge; 2 outer edges; 3 a first group of nail holes; 4 second set of nail holes.
The specific implementation mode is as follows:
the present invention will be described in detail with reference to the accompanying drawings.
The application is an anterior cervical spine C2, 3 off-center nail plate fixing system, includes:
the fixing plate is in an L-shaped plate shape, and the inner side edge 1 is thinner than the outer side edge 2; the L-shaped structure can enable the fixing plate to be eccentrically placed, so that the fixing plate is close to a zero incisura in the center of the front of the vertebral body, and the stimulation to the esophagus after the fixing plate is implanted is reduced, thereby reducing the incidence rate of throat discomfort after the operation and improving the satisfaction rate of the operation. The thicker outer edge increases the holding strength.
The fixing plate is provided with a first group of nail holes 3 and a second group of nail holes 4; the first group of nail holes 3 consists of 3 circular holes, the three holes are longitudinally arranged along the direction of the L-shaped long edge, the design is determined according to the transverse diameter, the oblique diameter and the anatomic shape with smaller front and back diameters and larger longitudinal diameter of the dentate centrum and the dentate process, the front and back diameters and the oblique diameter are small, so the screw is shorter, the fixing strength of two screws is low, the internal fixation failure is easy to occur, therefore, three screws are selected for fixation, and the three screws can realize three-point stability, and the capacity of resisting stretching, bending, rotation and lateral bending is greatly increased; the second group of nail holes 4 are arranged in a 'pin' shape, which is also based on the anatomical characteristics of the C3 vertebral body: the vertebral body is wide but is spongy, the holding force of the screws is poor, and the three-point stable structure of the three screws increases the fixing strength; the nail hole is the locking hole, and the nail board system becomes an organic whole after the screw is implanted, increases fixed intensity, avoids the screw roll-off simultaneously.
The first group of nail holes are inclined holes, and the axis of the first group of nail holes inclines towards the direction of the inner edge of the top end of the fixing plate; the second group of nail holes are inclined holes, and the axis of the second group of nail holes inclines towards the direction of the inner side edge. The design can enable the implanted nail to incline, the screw implantation direction is an oblique opposite side (the screw on the C2 vertebral body and the dentate process properly inclines towards the head end at the same time, the inclination angle of the screw at the uppermost end is maximum so as to be convenient for placement), and the oblique opposite side is approximately parallel to the incision direction.
The transition part of the inner side edge 1 is in a shape of an oblique arc. Further reducing the notch to reduce the irritation to the tracheoesophageal tract.
The top of the long edge of the fixing plate is in a pointed shape, the inclined edge and the long edge of the fixing plate form an included angle of 70-75 degrees, and the top of the pointed top is a round angle.
The implantation direction of the screw through the screw hole is an oblique opposite side and is parallel to the incision direction.
The fixing plate is of a plate-shaped structure made of titanium alloy or high polymer materials.
The axes of the first group of nail holes deviate from the normal of the fixing plate by 12-15 degrees. Most preferably the angle is 14 degrees.
The axes of the second group of nail holes deviate from the normal of the fixing plate by 14-17 degrees. Most preferably the angle is 16 degrees.
The high polymer material is polyether-ether-ketone or carbon fiber or other new materials with similar strength.
The technical solution is further described by the following examples. The scope of protection is not limited to this embodiment.
Example 1:
and (3) disinfecting and laying a sheet, making transverse incisions of the anterior cervical spine, entering layer by layer, exposing the vertebral body, confirming by fluoroscopy, performing C2 and 3 intervertebral disc excision decompression until the dural sac expands and has no pressure trace, flushing, stopping bleeding, implanting an intervertebral fusion device of a proper type filled with autologous bones or artificial bones, and placing C2 and 3 eccentric nail plate fixing systems of the anterior cervical spine. Placing the drainage tube, and suturing layer by layer. After the operation is finished.
Claims (7)
1. An anterior cervical approach C2, 3 eccentric nail plate fixing system, which is characterized in that:
the fixing plate is in an L-shaped plate shape, and the inner side edge (1) is thinner than the outer side edge (2);
a first group of nail holes (3) and a second group of nail holes (4) are formed in the fixing plate;
the first group of nail holes (3) consists of three circular holes which are longitudinally arranged along the direction of the L-shaped long edge;
the second group of nail holes (4) are arranged in a shape like a Chinese character 'pin';
the transition part of the inner side edge (1) is in an oblique arc shape;
the first group of nail holes (3) are inclined holes, and the axes of the first group of nail holes incline towards the direction of the inner side edge (1) of the top end of the fixing plate;
the second group of nail holes (4) are inclined holes, and the axis of the second group of nail holes inclines towards the direction of the inner side edge (1).
2. An anterior cervical C2, 3 eccentric Placement nail plate fixation system as claimed in claim 1, wherein: the top of the long edge of the fixing plate is in a pointed shape, the inclined edge and the long edge of the fixing plate form an included angle of 70-75 degrees, and the top of the pointed top is a round angle.
3. An anterior cervical C2, 3 eccentric Placement nail plate fixation system as claimed in claim 1, wherein: the implantation direction of the screw through the screw hole is an oblique opposite side and is parallel to the incision direction.
4. An anterior cervical C2, 3 eccentric Placement nail plate fixation system as claimed in claim 1, wherein: the fixing plate is of a plate-shaped structure made of titanium alloy or high polymer materials.
5. An anterior cervical C2, 3 eccentric Placement nail plate fixation system according to claim 4, wherein: the high polymer material is polyether-ether-ketone or carbon fiber.
6. An anterior cervical C2, 3 eccentric Placement nail plate fixation system as claimed in claim 1, wherein: the axes of the first group of nail holes (3) deviate from the normal line of the fixing plate by 12-15 degrees.
7. An anterior cervical C2, 3 eccentric Placement nail plate fixation system as claimed in claim 1, wherein: the axis of the second group of nail holes (4) deviates from the normal line of the fixing plate by 14-17 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920245254.8U CN209916169U (en) | 2019-02-27 | 2019-02-27 | Anterior cervical vertebra C2 and 3 eccentric nail plate placing fixing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920245254.8U CN209916169U (en) | 2019-02-27 | 2019-02-27 | Anterior cervical vertebra C2 and 3 eccentric nail plate placing fixing system |
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| CN209916169U true CN209916169U (en) | 2020-01-10 |
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| CN201920245254.8U Active CN209916169U (en) | 2019-02-27 | 2019-02-27 | Anterior cervical vertebra C2 and 3 eccentric nail plate placing fixing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662768A (en) * | 2019-02-27 | 2019-04-23 | 中国人民解放军北部战区总医院 | Nail-plate fixed systems eccentric are placed in a kind of anterior cervical vertebrae C2,3 |
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2019
- 2019-02-27 CN CN201920245254.8U patent/CN209916169U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662768A (en) * | 2019-02-27 | 2019-04-23 | 中国人民解放军北部战区总医院 | Nail-plate fixed systems eccentric are placed in a kind of anterior cervical vertebrae C2,3 |
| CN109662768B (en) * | 2019-02-27 | 2023-08-22 | 中国人民解放军北部战区总医院 | Anterior cervical C2, 3 eccentric placement nail plate fixing system |
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