CN211583439U - Novel anterior cervical fixing plate - Google Patents
Novel anterior cervical fixing plate Download PDFInfo
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- CN211583439U CN211583439U CN201922124892.7U CN201922124892U CN211583439U CN 211583439 U CN211583439 U CN 211583439U CN 201922124892 U CN201922124892 U CN 201922124892U CN 211583439 U CN211583439 U CN 211583439U
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Abstract
The utility model relates to a novel anterior cervical fixing plate, which comprises a bone fracture plate and screws; the bone fracture plate is provided with a plurality of universal locking holes and a bone grafting window, the bottom of the bone fracture plate is provided with an arc-shaped pressure reduction groove, the universal locking holes are threaded holes formed by splicing a plurality of pieces, and screws can be implanted and locked within a range of being 0-15 degrees away from the axis; the screw is provided with a first thread structure, a second thread structure and a tapping auxiliary structure. The utility model discloses a novel anterior cervical spine fixed plate has the universal advantage of implanting, locking of screw, and simple structure to need not extra screw and prevent moving back device and operation, practice thrift operation time, improved operation efficiency. The incision is low, the postoperative complications are reduced, and the postoperative life quality of the patient is improved.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a novel anterior cervical fixing plate.
Background
At present, the internal fixation and recovery of cervical spondylolisthesis, degenerative change of cervical intervertebral discs, tumors, wounds and the like are all treated by domestic and foreign operations by adopting a cervical anterior plate. Although the application of the anterior cervical plate is quite popular, the related complications are not ignored, the anterior cervical plate may have screw loosening, and the screw loosening not only has potential danger to important surrounding soft tissues, but also makes internal fixation easy to fail, thereby affecting the healing of the bone graft. In addition, because different patient spines have different anatomical structures, when the titanium plate is used for fixation, a certain angle adjustment needs to be carried out during the operation so as to meet the fixation requirements of different patients.
To the not hard up condition of deviating from of screw, mainly adopt at present to set up a limiting device on the fixed plate, spacing the screw, prevent that the screw from deviating from, nevertheless can make the fixed plate incised track improve, patient's postoperative swallowing difficulty has the complication risk. At present, in order to adjust the screw implantation angle in the fixing plate operation and realize the universal locking of the screw on the fixing plate, the nail head position of the screw with adjustable angle is provided with a special structural design, when in use, due to the adjustment of the screw angle, the limiting device can not tightly attach and lock the screw with adjustable angle at any angle, a certain gap can not be avoided between the pre-limiting devices of the screw with adjustable angle, and the instant stabilizing effect of the system is directly influenced.
In addition, the coaptation board of present anterior cervical spine fixed plate becomes the arc, and the direct laminating of postoperative is compressed tightly on the centrum surface, and easy direct oppression is attached to the blood vessel on centrum surface periosteum like this, influences centrum blood supply, extension patient postoperative recovery time.
Therefore, in order to overcome the technical defects, a novel anterior cervical fixing plate is designed to solve the problems that the existing anterior cervical fixing plate is not flexible, exits, has high incisura, adopts a locking plate to prevent the screw from being flexible, the integral structure of the anterior cervical fixing plate system is complicated, parts are increased, and a bone fracture plate is easy to press a vertebral body blood vessel to influence recovery, and the problems are urgently needed to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel anterior cervical spine fixed plate to the not hard up problem that easily withdraws from, the incisional track is high and adopt the locking plate to prevent that the screw is not hard up and the whole structure of the anterior cervical spine fixed plate system that causes is loaded down with trivial details, the part increases of screw, the anterior cervical spine fixed plate is provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a novel anterior cervical fixing plate, which comprises a bone fracture plate and screws; the bone fracture plate is provided with a plurality of universal locking holes and a bone grafting window, and the bottom of the bone fracture plate is provided with at least one arc-shaped pressure reduction groove; a first thread structure, a second thread structure and a tapping auxiliary structure are sequentially arranged on the screw from top to bottom.
Furthermore, the screw can pass through a universal locking hole on the bone fracture plate and be implanted and locked within the range of 0-15 degrees away from the axis, the universal locking hole is a threaded hole formed by splicing multiple pieces, and a groove perpendicular to the extension direction of the thread is formed in the splicing position.
Furthermore, the bone grafting window is a special-shaped through hole positioned among the universal locking holes, and the universal locking holes are positioned on the bone fracture plate corresponding to four corners of the bone grafting window.
Further, the arc-shaped pressure relief groove is a transversely extending groove located between the universal locking holes.
Furthermore, the hardness of the material of the bone fracture plate is smaller than that of the material of the screw.
Further preferably, the bone fracture plate is made of pure titanium, and the screw is made of titanium alloy.
Further, the first thread structure is located on the head of the screw, the second thread structure is located on the shaft of the screw, and the tapping auxiliary structure is located at the end of the shaft of the screw.
Further, a bottom diameter of the first thread form decreases from the proximal end to the distal end.
Further, the bottom diameter of the second thread structure remains unchanged.
Further preferably, the distal root diameter of the first thread formation is greater than or equal to the root diameter of the second thread formation.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the novel anterior cervical fixing plate system has the advantages that the screw can move greatly in the circumferential range through the angle-adjustable screw of the universal locking hole on the bone fracture plate, universal locking is realized, the screw feeding angle can be determined automatically according to the operation requirement, the fixation is flexible and fixed, and the fixation requirements of different angles can be met by means of the same model; the fixing device has the advantages of strong fastening force of the directional screws and adjustable angle screws, and can realize fixation at different angles according to different anatomical structures of the vertebral bodies of patients, so that the complexity of structure fixation is reduced; the abduction angle and the cohesion angle of the angle-adjustable screw accord with a certain mechanical rule, so that the whole system is more firmly fixed.
(2) The utility model discloses a novel anterior cervical spine fixed plate, including arc decompression groove, avoided the direct laminating of postoperative to sticis on the centrum surface, alleviateed to depending on the vascular pressure on centrum surface periosteum, reduced the influence to centrum blood supply, help shortening patient postoperative recovery time for the centrum fuses.
(2) The utility model discloses a novel anterior cervical spine fixed plate, screw and coaptation board hardness are different, and the screw can directly form new screw thread at the structural tapping of universal locking hole, and the extrusion makes the screw need not external device restriction through each other between the material, can prevent that the screw from deviating from, and the screw thread has stronger fastening force and simplicity, can prevent effectively that the screw from taking off from the internal pine of coaptation board.
(3) The utility model discloses a novel anterior cervical spine fixed plate constitutes simply, has reduced whole fixed plate system part quantity, has reduced the incisure of system, has simplified operation steps, has practiced thrift the operation time, has improved operation efficiency.
(4) The utility model discloses a novel anterior cervical spine fixed plate, the inner wall in universal locking hole be equipped with the screw thread extend to the vertically recess, can reduce the resistance that the screw receives when the tapping for tapping speed reduces operation time.
(5) The novel anterior cervical fixing plate of the utility model can save the occupied space of the whole anterior cervical fixing plate by reducing the number of the system components of the fixing plate on the premise of ensuring the strength of the fixing plate to reach the standard and the use safety of the product to reach the standard; while maintaining the strength and the safety, the bone grafting window can be increased, the low incisura design is ensured, and the complication is reduced.
Drawings
Fig. 1 is a schematic view of the novel anterior cervical fixing plate of the invention after operation;
fig. 2 is a schematic structural view of the novel anterior cervical fixing plate screw of the invention;
fig. 3 is a schematic structural view of the novel anterior cervical fixing plate bone fracture plate of the utility model;
fig. 4 is a schematic structural diagram of the novel anterior cervical fixing plate of the present invention before operation;
fig. 5 is a schematic structural view before operation of the novel anterior cervical fixing plate bone fracture plate of the invention;
FIG. 6 is a schematic view of the nail feeding method in the novel anterior cervical fixing plate operation of the present invention;
FIG. 7 is a schematic structural view of the novel cervical vertebra anterior fixing plate after being nailed;
FIG. 8 is a structural cross-sectional view of the novel cervical vertebra anterior fixing plate after being nailed;
wherein the reference numerals are:
a bone plate 1; a screw 2; a universal locking hole 10; a bone graft window 11; a fixing threaded hole 12; a groove 13; an arc-shaped pressure-reducing tank 14; a first thread 20; a second thread 21; the tapping assist structure 22.
Detailed Description
The present invention will be described in detail and specifically with reference to specific embodiments so as to provide a better understanding of the present invention, but the following embodiments do not limit the scope of the present invention.
As shown in fig. 1 to 4, the present embodiment provides a novel anterior cervical fixation plate, which is characterized by comprising a bone plate 1 and screws 2; the bone fracture plate is provided with a plurality of universal locking holes 10 and a bone grafting window 11, and the bottom of the bone fracture plate 1 is provided with at least one arc-shaped pressure reducing groove 14; the screw is sequentially provided with a first thread structure 20, a second thread structure 21 and a tapping auxiliary structure 22 from top to bottom.
The first thread structure 20 is located on the head of the screw 2, the second thread structure 21 is located on the shaft of the screw 2, and the tapping auxiliary structure 22 is located at the distal end of the shaft of the screw 2; the base diameter of the first thread structure 20 is gradually reduced from the proximal end to the distal end, the base diameter of the second thread structure 21 is kept unchanged, and the base diameter of the distal end of the first thread structure 20 is larger than or equal to the base diameter of the second thread structure 21; wherein, the proximal end refers to the end close to the operator, and the distal end refers to the end far away from the operator.
The screw 2 can be implanted and locked in a range of 0-15 degrees deviated from the axis through a universal locking hole 10 on the bone fracture plate 1, the universal locking hole 10 is a threaded hole formed by splicing a plurality of pieces, and a groove 13 which is vertical to the extension direction of the thread is arranged at the splicing position. The screw 2 is an angle-adjustable screw, can move greatly in the circumferential range by matching with a universal locking hole structure on the bone fracture plate, realizes universal locking, can be automatically determined according to the operation requirement and flexibly fixed, and meets the fixing requirements of different angles by means of the same model; the fixing device has the advantages of strong fastening force of the directional screws and adjustable angle screws, and can realize fixation at different angles according to different anatomical structures of the vertebral bodies of patients, so that the complexity of structure fixation is reduced; the abduction angle and the cohesion angle of the angle-adjustable screw accord with a certain mechanical structure principle, and the whole system is more firmly fixed. The grooves 13 which are perpendicular to the thread extending direction and are arranged on the inner wall of the universal locking hole 10 can reduce the resistance of the screw during tapping, accelerate the tapping speed and reduce the operation time.
In a preferred embodiment, the bone plate 1 is provided with at least one arc-shaped pressure-reducing groove 14 at the bottom, and the arc-shaped pressure-reducing groove 14 is a transversely extending groove positioned between the universal locking holes 10; the arc-shaped pressure reduction groove 14 avoids direct adhesion and pressing on the surface of the vertebral body after operation, reduces the pressure on blood vessels attached to the periosteum on the surface of the vertebral body, reduces the influence on blood supply of the vertebral body, is beneficial to shortening the postoperative recovery time of a patient and accelerates the fusion of the vertebral body.
In a preferred embodiment, the hardness of the bone plate 1 is less than that of the screw 2, the bone plate 1 is made of pure titanium, and the screw 2 is made of titanium alloy; the screw 2 and the bone fracture plate 1 are different in hardness, the screw 2 can be directly tapped on the universal locking hole 10 structure to form a new thread, the screw 2 can be prevented from being separated without being limited by an external device through mutual extrusion of materials, the thread has stronger fastening force and simplicity, and the screw 2 can be effectively prevented from being loosened from the bone fracture plate.
As shown in fig. 4-8, the working principle of the novel anterior cervical fixing plate of the present embodiment is as follows: before the operation, the operator can be according to patient's sclerotin and different physiological conditions, formulate the operation scheme, the angle of advancing of selection screw 2, screw 2 passes through according to predetermineeing the angle when implanting, and destroy universal locking hole 10 original structure, universal locking hole 10 on the coaptation board 1 is owing to receive screw 2 tapping formation fixed screw hole 12, the screw direction in the fixed screw hole 12 corresponds with the direction of advancing of screw 2, the screw in the fixed screw hole 12 makes screw 2 and coaptation board 1 fastening fit, make screw 2 need not external device restriction through the mutual extrusion between the material, can prevent that the screw from deviating from.
As another preferred embodiment, the bone grafting window 11 is a special-shaped through hole located between the universal locking holes 10, a plurality of the universal locking holes 10 are located on the bone plate 1 corresponding to four corners of the bone grafting window 11, and two or more than two bone grafting windows 11 can be arranged while maintaining strength and safety.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope and the embodiments of the present invention, and those skilled in the art should be able to realize that all the equivalent alternatives and obvious variations made by the present invention and the attached drawings are included in the scope of the present invention.
Claims (10)
1. A novel anterior cervical fixing plate is characterized by comprising a bone plate (1) and screws (2); the bone fracture plate (1) is provided with a plurality of universal locking holes (10) and a bone grafting window (11), and the bottom of the bone fracture plate (1) is provided with at least one arc-shaped pressure reduction groove (14); a first thread structure (20), a second thread structure (21) and a tapping auxiliary structure (22) are sequentially arranged on the screw (2) from top to bottom.
2. The novel anterior cervical fixing plate according to claim 1, wherein the screw (2) can pass through a universal locking hole (10) on the bone plate (1) and be implanted and locked within a range of 0-15 degrees of deviation from the axis, the universal locking hole (10) is a threaded hole formed by multi-petal splicing, and a groove (13) perpendicular to the extension direction of the thread is formed at the splicing position.
3. The novel anterior cervical fixing plate according to claim 1, wherein the bone-grafting window (11) is a special-shaped through hole located between the universal locking holes (10), and a plurality of universal locking holes (10) are located on the bone plate (1) corresponding to four corners of the bone-grafting window (11).
4. A novel anterior cervical fixation plate according to claim 1, wherein the arc-shaped pressure relief slots (14) are laterally extending grooves between the gimbaled locking holes (10).
5. The new anterior cervical fixation plate according to claim 1, characterized in that the hardness of the material of the bone plate (1) is less than the hardness of the material of the screw (2).
6. The novel anterior cervical fixing plate according to claim 5, wherein the bone plate (1) is made of pure titanium, and the screw (2) is made of titanium alloy.
7. A new type of anterior cervical fixation plate according to claim 1, characterized in that said first threaded structure (20) is located at the head of said screw (2), said second threaded structure (21) is located at the shank of said screw (2), and said tapping aid structure (22) is located at the end of the shank of said screw (2).
8. A novel anterior cervical fixation plate according to claim 1, wherein the base diameter of the first thread structure (20) decreases gradually from the proximal end to the distal end.
9. A new anterior cervical fixation plate according to claim 1, characterized in that the base diameter of the second thread structure (21) remains unchanged.
10. A novel anterior cervical fixation plate according to claim 8 or 9, wherein the distal base diameter of the first thread structure (20) is greater than or equal to the base diameter of the second thread structure (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922124892.7U CN211583439U (en) | 2019-12-02 | 2019-12-02 | Novel anterior cervical fixing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922124892.7U CN211583439U (en) | 2019-12-02 | 2019-12-02 | Novel anterior cervical fixing plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211583439U true CN211583439U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922124892.7U Active CN211583439U (en) | 2019-12-02 | 2019-12-02 | Novel anterior cervical fixing plate |
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|---|---|
| CN (1) | CN211583439U (en) |
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2019
- 2019-12-02 CN CN201922124892.7U patent/CN211583439U/en active Active
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