CN218870441U - Novel patella internal fixation device - Google Patents
Novel patella internal fixation device Download PDFInfo
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- CN218870441U CN218870441U CN202221541626.XU CN202221541626U CN218870441U CN 218870441 U CN218870441 U CN 218870441U CN 202221541626 U CN202221541626 U CN 202221541626U CN 218870441 U CN218870441 U CN 218870441U
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Abstract
The invention discloses a novel patella internal fixation device, which comprises a locking bone fracture plate and a hook-shaped fixing plate, wherein the locking bone fracture plate is provided with a locking hook; the locking bone fracture plate comprises a head part, a neck part and a body part which are connected in sequence; the head part is provided with a locking hole; an included angle of 115-125 degrees is formed between the head part and the body part through the neck part, and the size of the included angle is adjustable; the neck part is in an elliptic arc soft structure; the body part is rectangular, and an oval adjusting through hole is arranged in the middle of the body part along the extending direction of the body part; the outer surface of the body part is provided with a ratchet structure; the claw-shaped fixing plate comprises a fixing plate and a claw; the shape of the fixing plate is adapted to the rectangular shape of the body part, and an oval adjusting through hole is also arranged; the ratchet structure capable of being meshed with the ratchet structure on the outer surface of the body is arranged at the position where the inner side of the fixing plate is overlapped with the body; the hook claw extends towards the inner direction. The device has strong fixing force, is not easy to loosen, is easy to reset and implant, can perform functional activities in early stage, and is suitable for all patellar fractures.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a novel patella internal fixation device.
Background
The patella is the largest seed bone in a human body and is a part of the knee joint, plays roles of protecting the knee joint, enhancing the muscle strength of the four thighs, maintaining the stability of the knee joint, contributing to the nutrition supply of the knee joint and the like, and the fracture of the patella is a common fracture part and accounts for about 1 to 3 percent of all fractures of the whole body. The treatment modes of the patellar fracture comprise conservative treatment (plaster brace fixation), external fixation support fixation, incision reduction internal fixation, patellar resection and the like, the conservative treatment is only used for temporary fracture fixation or the patients with poor physical conditions, big ages and incapability of tolerating the operation, the current treatment principle for the patellar fracture is mainly incision reduction internal fixation operation and assisted by the conservative treatment, and the current incision reduction internal fixation operation mode mainly comprises a tension band technology, patellar reduction fixator fixation and steel plate fixation. The tension band technique has the following problems: the tip and tail of the Kirschner wire stimulate soft tissues to cause local pain and even puncture the skin; the internal fixation fails due to the loosening and withdrawing of the Kirschner wire and the breakage of the steel wire; the inferior patella fracture and comminuted fracture are difficult to fix; postoperative functional restriction, etc.
The prior art publication No. CN213217532U discloses a patella claw for treating patellar fracture, and a plurality of patents such as patella claw for treating patellar fracture; the patella claw is suitable for various types of patella fractures and is relatively firm in fixation; however, because the inferior pole of the patella is like a hook and the superior pole is like a slope, the inferior lobe of the patella claw is fixed more stably, and the superior lobe has the problems of loosening and slipping and difficult reduction and implantation.
The prior art publication number is: CN215534922U discloses a patella fracture fixation device, which realizes fixation through a tension binding wire; the publication number is: CN111358543A discloses a steel plate device for patellar lower pole fracture, which wraps the patellar lower pole and the side lower part of the patella in an arc shape by a fixing steel plate; the scheme disclosed by a plurality of searched prior patents mainly comprises fixing modes in the forms of miniature steel plates, net-shaped steel plates, calcaneus locking steel plates, palm and finger steel plates and the like, and has the following problems: the applicability of each kind of steel sheet is all very narrow, often can choose for use different steel sheets according to the different grade type of patella fracture, and netted steel sheet is fixed comparatively firm to patella comminuted fracture, but its wound is great, fixed expensive.
Disclosure of Invention
1. The technical problem to be solved is as follows:
aiming at the technical problems, the invention provides a novel patella internal fixation device which has the advantages of strong fixation force, difficulty in loosening, easiness in resetting and implanting, capability of moving functions in early stage, suitability for all patella fractures and the like, solves the limitation of each internal fixation mode of the existing patella, and provides a novel internal fixation thought.
2. The technical scheme is as follows:
the utility model provides a novel kneecap internal fixation device which characterized in that: comprises a locking bone fracture plate and a hook-shaped fixing plate; the locking bone fracture plate comprises a head part, a neck part and a body part which are connected in sequence; the head part is provided with a locking hole for passing through the screw and a groove for placing the binding wire; an included angle is formed between the head part and the body part through the neck part, and the size of the included angle is adjustable within 115-125 degrees; the neck part is of a soft structure in an oval arc shape; the body part is square, and an oval adjusting through hole is arranged in the middle of the body part along the downward extending direction of the body part; the outer surface of the body is provided with a ratchet structure.
The hook claw type fixing plate comprises a fixing plate and hook claws connected to the lower end of the fixing plate; the shape of the fixing plate is adapted to the square shape of the body part, and an oval adjusting through hole is also formed in the fixing plate; the position of the inner side of the fixed plate, which is overlapped with the body part, is provided with a ratchet structure which can be meshed with the ratchet structure on the outer surface of the body part; the hook claw extends towards the inner direction.
Further, the number of the locking holes for locking the head of the bone plate is two; the two locking holes are arranged in the horizontal or vertical direction.
Further, when the two locking holes are horizontal, the groove is located at a position below the two locking holes.
Further, when the two locking holes are vertical, the groove is positioned in the middle of the two locking holes.
Furthermore, the hook claw of the hook claw type fixing plate is two or more hook claws.
Further, the body of the locking bone plate is of a steel plate structure.
3. Has the beneficial effects that:
(1) The novel patella internal fixation device provided by the invention comprises a locking bone fracture plate and a claw-shaped fixing plate, the size of the fixing connection can be adjusted through a fixing adjusting groove, and the adaptability is good.
(2) In the novel patella internal fixation device provided by the invention, the head part and the body part of the locking bone fracture plate are bent at an adjustable angle of 115-125 degrees through the neck part, and the locking bone fracture plate can be well attached to the upper pole of the patella.
(3) In the novel patella internal fixation device provided by the invention, a group of locking screw holes, usually two screw holes, or a plurality of screw holes, are arranged at the head of the locking bone fracture plate, the direction of the locking screw holes is parallel to the longitudinal axis of the patella, the head can be linear or T-shaped, and suture holes can be arranged for realizing fixation.
Drawings
FIG. 1 is a front view of a locking bone plate of the present invention;
FIG. 2 is a side view of the locking bone plate of the present invention;
FIG. 3 is a front view of a clevis type fixing plate according to the present invention;
FIG. 4 is a cross-sectional view of the patella being secured using the intra-patellar fixation device of the present invention;
fig. 5 is a schematic view of the locking bone plate of the present invention with the head in a straight line.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in the attached drawings 1 to 5, a novel patella internal fixation device is characterized in that: comprises a locking bone fracture plate and a hook-shaped fixing plate; the locking bone fracture plate comprises a head part 3, a neck part 4 and a body part 5 which are connected in sequence; the head part is provided with a locking hole 6 for passing through a screw and a groove 11 for placing binding wires; an included angle is formed between the head part and the body part through the neck part, and the size of the included angle is adjustable within 115-125 degrees; the neck part is of a soft structure in an oval arc shape; the body part is square, and an oval adjusting through hole 7 is arranged in the middle of the body part along the extending direction of the body part; the outer surface of the body is provided with a ratchet structure 10.
The claw-type fixing plate comprises a fixing plate 8 and a claw 9 connected to the lower end of the fixing plate; the shape of the fixing plate is adapted to the square shape of the body part, and an oval adjusting through hole 7 is also arranged; the position of the inner side of the fixed plate, which is overlapped with the body part, is provided with a ratchet structure which can be meshed with the ratchet structure on the outer surface of the body part; the hook claw extends towards the inner direction.
Further, the number of the locking holes 6 for locking the head of the bone plate is two; the two locking holes are arranged in the horizontal or vertical direction.
Further, when the two locking holes are horizontal, the groove 11 is located at a position below the two locking holes.
Further, when the two locking holes are vertical, the groove 11 is located between the two locking holes.
Furthermore, the hook claw of the hook claw type fixing plate is two or more hook claws.
Further, the body of the locking bone fracture plate is of a steel plate structure.
The specific embodiment is as follows:
as shown in fig. 1, 2 and 3, the head of the locking bone plate is provided with two locking holes which are vertically arranged; the distance between the two is usually 10 to 15mm; a groove structure passing through a suture line, a titanium cable or a steel wire is arranged between the locking holes; the neck part is arranged at the joint of the head part and the body part, is soft and plastic, and can be bent properly if the shape is not quite consistent, such as the angle beta in the attached figure 2. The lower section of the body part of the locking bone fracture plate is provided with an adjusting through hole, the upper surface of the body part is provided with a ratchet structure, the upper surface of the hook claw type fixing plate is provided with the ratchet structure, and the surface of the hook claw type fixing plate is also provided with the adjusting through hole; the locking bone fracture plate is meshed with the hook claw type fixing plate through a ratchet structure, and the nut realizes pressurization fixing through the two adjusting through holes. The periphery of the patella is wound and fixed through a suture line, a titanium cable or a steel wire in the groove.
As shown in fig. 4, 13 indicates a patella, after the body of the locking bone fracture plate is fixed during the operation, the hook-shaped fixing plate is placed at a proper position, the forceps are used for clamping and applying pressure, the body of the locking bone fracture plate and the hook-shaped fixing plate move relatively by utilizing the meshing performance of the ratchet structure, when the pressure required to be fixed is reached, the nut is used for pressurizing and fixing through two overlapped adjusting through holes, and at the moment, the locking bone fracture plate and the hook-shaped fixing plate do not move relatively. The locking hole is implanted with a locking screw 12; the locking screw is usually a 3.5mm locking screw, can form batch production, and can also be specially manufactured; the implantation direction of the locking screw is parallel to the longitudinal axis of the patella, and the locking screw can be replaced by a steel wire or a titanium cable or other materials to cerclage the patella, so that the fracture fixation stability is further improved.
As shown in the attached figure 5, the head of the locking bone fracture plate is T-shaped, the surface of the head is provided with 2 locking holes, and the distance between the screw holes of the locking holes is 10-15 mm. The neck parts are arranged between the locking holes and at the joint with the head body, and the neck parts enable the position plate to be plastic, and if the shape is not in accordance with the shape, the position plate can be bent appropriately; meanwhile, the head is provided with a groove for fixing technologies of other materials such as suture, steel wire or titanium cable and the like. The lower section of the body part of the locking bone fracture plate is provided with a ratchet structure and an adjusting through hole, the corresponding hook claw type fixing plate is the same as that in the picture 1, the ratchet structure and the adjusting through hole are arranged and meshed through the ratchet structure, and a nut is pressed and fixed through the two adjusting through holes which are overlapped. Meanwhile, as mentioned above, the fixing device can also be replaced by a steel wire or a titanium cable or other materials to cerclage the patella, so as to further improve the stability of fracture fixation.
The invention relates to a novel internal fixing device for a patella, which is provided with a locking bone fracture plate with a head part and a body part, wherein the angle beta of the joint of the head part and the body part is in accordance with the anatomical angle of the upper pole of the patella; the included hook claw fixing plate is mainly of a hook claw type, and can be two claws or a plurality of claws. The shapes of the head part and the body part can be further changed, and the head part and the body part can also be provided with a locking hole, a pressurizing hole, a combined hole, a suture hole and the like.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a novel kneecap internal fixation device which characterized in that: comprises a locking bone fracture plate and a hook-shaped fixing plate; the locking bone fracture plate comprises a head part, a neck part and a body part which are connected in sequence; the head part is provided with a locking hole for passing through the screw and a groove for placing the binding wire; an included angle is formed between the head part and the body part through the neck part, and the size of the included angle is adjustable within 115-125 degrees; the neck part is of a soft structure in an oval arc shape; the body part is square, and an oval adjusting through hole is formed in the middle of the body part along the downward extending direction of the body part; the outer surface of the body is provided with a ratchet structure;
the claw-shaped fixing plate comprises a fixing plate and a claw connected to the lower end of the fixing plate; the shape of the fixing plate is adapted to the square shape of the body part, and an oval adjusting through hole is also formed in the fixing plate; the position of the inner side of the fixed plate, which is overlapped with the body part, is provided with a ratchet structure which can be meshed with the ratchet structure on the outer surface of the body part; the hook claw extends towards the inner direction.
2. The novel patellar internal fixation device according to claim 1, wherein: the number of the locking holes for locking the head of the bone fracture plate is two; the two locking holes are arranged in the horizontal or vertical direction.
3. The novel patellar internal fixation device according to claim 2, wherein: when the two locking holes are horizontal, the groove is positioned below the two locking holes.
4. The novel intra-patellar fixing device according to claim 2, wherein: when the two locking holes are vertical, the groove is positioned in the middle of the two locking holes.
5. The novel patellar internal fixation device according to claim 1, wherein: the hook claw of the hook claw type fixing plate is two or more hook claws.
6. The novel patellar internal fixation device according to claim 1, wherein: the body of the locking bone fracture plate is of a steel plate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221541626.XU CN218870441U (en) | 2022-06-20 | 2022-06-20 | Novel patella internal fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221541626.XU CN218870441U (en) | 2022-06-20 | 2022-06-20 | Novel patella internal fixation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218870441U true CN218870441U (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221541626.XU Active CN218870441U (en) | 2022-06-20 | 2022-06-20 | Novel patella internal fixation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218870441U (en) |
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2022
- 2022-06-20 CN CN202221541626.XU patent/CN218870441U/en active Active
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