CN112971963A - Tibial plateau removing device - Google Patents
Tibial plateau removing device Download PDFInfo
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- CN112971963A CN112971963A CN202110162857.3A CN202110162857A CN112971963A CN 112971963 A CN112971963 A CN 112971963A CN 202110162857 A CN202110162857 A CN 202110162857A CN 112971963 A CN112971963 A CN 112971963A
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- tibial plateau
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/92—Impactors or extractors, e.g. for removing intramedullary devices
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Abstract
The invention provides a tibial plateau taking-out device which comprises a platform seat, a connecting position, a movable arm and an opening and closing structure, wherein the connecting position is arranged on the platform seat and is suitable for being connected with a sliding hammer; the opening and closing structure is arranged between the two movable arms and is used for driving the two movable arms to approach to or depart from each other; the tibial plateau taking-out device can be matched and connected with a common tibial plateau, and the tibial plateau is taken out smoothly by using the sliding hammer, so that the tibial plateau taking-out difficulty can be reduced, and the operation efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of orthopedic medical instruments, in particular to an auxiliary extraction device for extracting a tibial plateau.
Background
Total knee replacement is an effective method of treating terminal knee arthritis. The number of operations has increased year by year in recent years due to the remarkable clinical effects. Despite satisfactory efficacy, approximately 1% of patients develop knee joint infections each year, or wear or loosening of the knee prosthesis occurs in the 15 th to 20 th years after surgery, requiring revision knee surgery.
Existing knee prosthesis compositions include: the tibial component includes a femoral component, a tibial component, and a liner positioned between the femoral component and the tibial plateau. The structure of the tibial plateau is shown in fig. 1-2, and comprises a plateau support 01, wherein the plateau support 01 is provided with a top surface 02 and a bottom surface 03, the top surface 02 is provided with a clamping groove 04 for assisting in fixing a gasket, and the bottom surface 03 is provided with a connecting part 05 for being inserted into a tibia to realize fixation. After the tibial plateau is fixed, the bottom surface 03 is completely attached to the top section of the tibia. Still another tibial plateau structure is shown in fig. 5-6, and includes a plateau 01, the plateau 01 having a top surface 02 and a bottom surface 03, the top surface 02 is used for assisting in fixing the pad, and the bottom surface 03 is provided with a connecting portion 04 for inserting into the tibia to realize fixing. After the tibial plateau is fixed, the bottom surface 03 is completely attached to the top section of the tibia.
Currently, only a tool for driving a tibial plateau into a tibia during a knee arthroplasty is clinically used, but no proper extraction instrument is provided. When the knee joint revision operation is performed, the tibial plateau needs to be taken out, and the force application is inconvenient due to the structure of the tibial plateau, so that the tibial plateau is difficult to take out.
Therefore, how to design a tool for conveniently taking out the tibial plateau is a technical problem which is not solved in the prior art.
Disclosure of Invention
Therefore, the present invention is directed to overcome the technical problem that there is no tool for facilitating the tibial plateau to be removed in the prior art, so that the tibial plateau is not conveniently removed during the tibial revision surgery, thereby providing a device for assisting in removing the tibial plateau.
To this end, the invention provides a tibial plateau extraction device comprising:
a platform base;
the connecting position is arranged on the platform seat and is suitable for connecting the sliding hammer;
the two movable arms are oppositely arranged, one end of each movable arm is rotatably connected with the platform base, and the other end of each movable arm is a connecting end suitable for being connected with the tibial platform;
the opening and closing structure is arranged between the two movable arms and used for driving the two movable arms to be close to or far away from each other.
As a preferable aspect, the opening and closing structure includes:
openings which are respectively formed on the movable arms and are opposite in position;
the limiting block is rotatably arranged in the opening through a rotating shaft and is provided with an internal thread hole;
the two ends of the threaded shaft are respectively screwed with the internal thread holes of the two limiting blocks;
when the threaded shaft rotates around the first direction, the threaded shaft drives the two movable arms to be opened and away through the internal threaded hole;
when the threaded shaft rotates around the second direction, the threaded shaft drives the two movable arms to be retracted and close through the internal threaded hole;
when the threaded shaft drives the two movable arms to move, the two limiting blocks rotate through the rotating shaft, so that the internal threaded hole and the threaded shaft are always vertically screwed.
Preferably, a polygonal operating block is fixedly sleeved in the middle of the threaded shaft.
As a preferred scheme, the left side and the right side of the limiting block are respectively rotatably installed in the opening through the rotating shafts, and the axes of the rotating shafts are overlapped.
Preferably, the connecting end of the movable arm is provided with external teeth, and the two external teeth are arranged in a protruding manner;
or the movable arm connecting end is provided with a clamping groove, and the openings of the two clamping grooves are oppositely arranged.
As a preferred scheme, be equipped with two relative U type openings on the platform seat, two the one end of digging arm is rotationally installed through the installation axle respectively inside the U type opening.
As a preferred scheme, the inner side surface of the movable arm is a plane, and the outer side surface of the movable arm is an arc surface.
Preferably, the external teeth are formed in an arc shape on an outer side surface of the movable arm.
As a preferable scheme, the two movable arms are symmetrically arranged.
As a preferred scheme, the platform seat is circular, the radius of the arc lateral surface of the movable arm is the same as the radius of the platform seat, and the circle center is overlapped up and down.
Preferably, the platform base has a top surface and a bottom surface, the connecting portion is disposed on the top surface, and the two movable arms extend toward the bottom surface.
The technical scheme provided by the invention has the following advantages:
1. the invention relates to a tibial plateau taking-out device which comprises a platform seat, a connecting position, a movable arm and an opening and closing structure, wherein the connecting position is arranged on the platform seat and is suitable for being connected with a sliding hammer; the opening and closing structure is arranged between the two movable arms and is used for driving the two movable arms to approach to or depart from each other; the tibial plateau taking-out device comprises a tibial plateau taking-out device, a sliding hammer, an opening and closing structure and a sliding mechanism, wherein the opening and closing structure is adjusted to enable connecting ends of two movable arms to be opposite to corresponding connecting positions of the tibial plateau, the opening and closing structure is adjusted to enable the two movable arms to move relatively, the connecting ends are gradually and fixedly connected with the connecting positions of the tibial plateau, and finally the opening and closing structure is stopped to be adjusted; the tibial plateau taking-out device can be matched and connected with a common tibial plateau, and the tibial plateau is taken out smoothly by using the sliding hammer, so that the tibial plateau taking-out difficulty can be reduced, and the operation efficiency can be improved.
2. The invention relates to a tibial plateau taking-out device, which comprises an opening formed on a movable arm, limiting blocks rotatably arranged in the opening through a rotating shaft, and a threaded shaft in threaded connection with the two limiting blocks, wherein the opening is formed on the movable arm; the external thread of the threaded shaft and the internal thread of the limiting block can be arranged at will, as long as the threaded shaft can drive the two movable arms to be opened outwards to be far away when rotating around the first direction, and the threaded shaft can drive the two movable arms to be retracted inwards to be close to each other when rotating around the second direction; the stopper passes through the pivot and rotationally installs inside the opening, and when the screw shaft passed through the drive stopper, and then the drive digging arm opened or when adduction, the stopper can be adjusted by oneself for the digging arm to the internal thread hole that makes the stopper can remain perpendicular spiro union with the screw shaft throughout.
3. According to the tibial plateau taking-out device, the polygonal operating block is fixedly sleeved in the middle of the threaded shaft, the outer wall of the operating block is polygonal, and an external tool is conveniently used for assisting in rotating the threaded shaft.
4. According to the tibial platform taking-out device, the inner side surface of the movable arm is a plane, the outer side surface of the movable arm is a cambered surface, and the modeling structure of the movable arm is firmer and is not easy to bend and break; the outer teeth are formed on the outer side surface of the movable arm in an arc shape and are suitable for being matched with the clamping grooves.
5. According to the tibial plateau taking-out device, the platform base is circular, the radius of the arc-shaped outer side surface of the movable arm is the same as that of the platform base, and the circle centers are overlapped up and down.
Drawings
To more clearly illustrate the technical solutions in the prior art or the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments are briefly introduced below.
Fig. 1 is a perspective view of a prior art tibial plateau.
Fig. 2 is another perspective view of fig. 1.
Fig. 3 is a perspective view of a tibial plateau extraction device in accordance with example 1 of the present invention.
Fig. 4 is another perspective view of fig. 3.
Fig. 5 is a perspective view of another prior art tibial plateau.
Fig. 6 is another perspective view of fig. 5.
Fig. 7 is a perspective view of a tibial plateau extraction device in accordance with example 2 of the present invention.
Fig. 8 is another perspective view of fig. 7.
Reference numerals: 01. a platform support; 02. a top surface; 03. a bottom surface; 04. a card slot; 05. a connecting portion; 1. a platform base; 10. a U-shaped opening; 11. a top surface; 12. a bottom surface; 2. a connection bit; 3. a movable arm; 4. an outer tooth; 5. an opening; 6. a limiting hole; 61. a rotating shaft; 62. an internally threaded bore; 7. a threaded shaft; 71. an operation block; 8. a card slot; 9. an operating handle.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings.
Example 1
The present embodiments provide a tibial plateau extraction device, as shown in fig. 3-4, comprising: the platform comprises a platform base 1, a connecting position 2, a movable arm 3 and an opening and closing structure; wherein, the connecting position 2 is arranged on the platform base 1 and is suitable for connecting a sliding hammer; the two movable arms 3 are oppositely arranged on the platform base 1, specifically, one end of each movable arm 3 is rotatably connected to the platform base 1, the other end of each movable arm is provided with outer teeth 4, and the outer teeth 4 protrude outwards and extend; the opening and closing structure is arranged between the two movable arms 3 and used for driving the two movable arms 3 to approach to each other or to be away from each other.
The platform base 1 is provided with two opposite U-shaped openings 10, and one ends of the two movable arms 3 are respectively and rotatably installed in the U-shaped openings 10 through installation shafts 31.
When the tibial plateau taking-out device is used, firstly, the opening and closing structure is adjusted to enable the two movable arms 3 to be retracted to be close to each other until the external teeth 4 can be clamped into the clamping groove 04 of the tibial plateau, then the opening and closing structure is adjusted to enable the two movable arms 3 to be opened, so that the external teeth 4 gradually penetrate into the clamping groove 04 to be clamped, at the moment, the end parts of the external teeth 4 are abutted against the bottom surface of the clamping groove 04, or the outer side surfaces of the movable arms 3 are abutted against the outer side surfaces of the clamping groove 04, then the opening and closing structure is stopped being adjusted, and after the sliding hammer is connected to the position 2 of the connecting position, force can be; the tibial plateau extracting device of this embodiment can be connected with the tibial plateau phase-match commonly used to utilize the smooth shank of taking out of sliding hammer, therefore can reduce the degree of difficulty of taking out of tibial plateau, improve operation efficiency.
Specifically, the opening and closing structure comprises an opening 5 formed on the movable arm 3, limiting blocks 6 rotatably mounted in the opening 5 through a rotating shaft 61, and a threaded shaft 7 in threaded connection with the two limiting blocks 6; the external thread of the threaded shaft 7 and the internal thread of the limiting block 6 can be arranged at will, as long as the threaded shaft 7 can drive the two movable arms 3 to be opened outwards to be away from the limiting block when rotating around the first direction, and the threaded shaft 7 can drive the two movable arms 3 to be retracted inwards to be close to the limiting block when rotating around the second direction; the stopper 6 is rotatably installed inside the opening 5 through the rotating shaft 61, and when the threaded shaft 7 is opened or closed through the driving stopper 6 and then the driving movable arm 3 is opened or closed, the stopper 6 can be adjusted by itself relative to the movable arm 3, so that the internal threaded hole 62 of the stopper 6 and the threaded shaft 7 can be always kept in a vertical threaded connection.
Preferably, the middle part of the threaded shaft 7 is fixedly sleeved with a polygonal operating block 71, so that an external tool can be conveniently used for assisting in rotating the threaded shaft 7.
In this embodiment, the left and right sides of stopper 6 is rotationally installed inside opening 5 through pivot 61 respectively, sets up the axis coincidence of two pivot 61 in the left and right sides of stopper 6. So set up, can guarantee when rotating threaded shaft 7, and then drive the digging arm 3 and open or when adduction, can guarantee the perpendicular spiro union of internal thread hole 62 and threaded shaft 7 of stopper 6 all, and then can continuously adjust the angle that opens and shuts of digging arm 3.
The inner side surface of the movable arm 3 is a plane, and the outer side surface is a cambered surface; the modeling structure of the movable arm 3 is firmer and is not easy to bend and break; the outer teeth 4 are formed on the outer side surface of the movable arm 3 in an arc shape and are adapted to be matched with the clamping grooves 04.
Preferably, the two movable arms 3 are symmetrically arranged.
Preferably, platform seat 1 is circular, and the radius of the arc lateral surface of digging arm 3 is the same with platform seat 1's radius, and the centre of a circle coincides from top to bottom, and whole device is compact reasonable, small and exquisite easy-to-use.
Preferably, the platform base 1 has a top surface 11 and a bottom surface 12, the connecting site 2 is arranged on the top surface 11, and the two movable arms 3 extend towards the bottom surface 12.
The method of use of the tibial plateau extraction device of this embodiment is as follows:
firstly, checking whether the opening degrees of the two outer teeth 4 of the device can be installed into the clamping groove 04 of the tibial platform, if so, directly carrying out the next step, if not, driving the threaded shaft 7 to rotate around the second direction, and pulling the two movable arms 3 to be adducted by the threaded shaft 7 through the limiting block 6 until the opening degrees of the two outer teeth 4 can be installed into the clamping groove 04 of the tibial platform;
then, the threaded shaft 7 is driven to rotate around a first direction opposite to a second direction, the threaded shaft 7 pulls the two movable arms 3 to open through the limiting blocks 6 until the end parts of the external teeth 4 abut against the bottom surface of the clamping groove 04, or the outer side surfaces of the movable arms 3 abut against the outer side surfaces of the clamping groove 04;
then, the opening and closing structure is stopped to be adjusted, and after the sliding hammer is connected to the position 2 of the connecting position, force can be applied to pull out the tibial plateau outwards.
Example 2
The present embodiment provides a tibial plateau retrieval device, as shown in fig. 7 to 8, which is a modification of embodiment 1, except that a catch 8 is provided at the other end of the movable arm 3 for retrieving the tibial plateau shown in fig. 5 to 6. An operating handle 9 is attached to the screw shaft 7 to assist in turning the screw shaft 7.
The tibial plateau remove device of this embodiment is when using, at first adjusts the structure that opens and shuts and makes two digging arms 3 open in order to keep away from each other, and it is relative with tibial plateau's edge until draw-in groove 8, and the structure that opens and shuts of readjustment makes two digging arms 3 adduction, makes draw-in groove 8 block gradually chucking on tibial plateau's the edge, then stops to adjust the structure that opens and shuts, behind the smooth hammer of 2 position connection in the connection position, can the application of force outwards pull out tibial plateau.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A tibial plateau extraction device, comprising:
a platform base (1);
the connecting position (2) is arranged on the platform base (1) and is suitable for being connected with a sliding hammer;
the two movable arms (3) are oppositely arranged, one end of each movable arm is rotatably connected with the platform base (1), and the other end of each movable arm is a connecting end suitable for being connected with a tibial platform;
the opening and closing structure is arranged between the two movable arms (3) and used for driving the two movable arms (3) to be close to or far away from each other.
2. The tibial plateau retrieval device of claim 1, wherein: the opening and closing structure comprises:
openings (5) which are formed on the movable arms (3) respectively and are opposite in position;
a limiting block (6) which is rotatably arranged in the opening (5) through a rotating shaft (61) and is provided with an internal thread hole (62);
the two ends of the threaded shaft (7) are respectively screwed with the internal thread holes (62) of the two limiting blocks (6);
when the threaded shaft (7) rotates around a first direction, the threaded shaft (7) drives the two movable arms (3) to be unfolded and separated through the internal threaded hole (62);
when the threaded shaft (7) rotates around the second direction, the threaded shaft (7) drives the two movable arms (3) to be retracted and close through the internal threaded hole (62);
when the threaded shaft (7) drives the two movable arms (3) to move, the two limiting blocks (6) rotate through the rotating shaft (61), so that the internal threaded hole (62) and the threaded shaft (7) are always vertically screwed.
3. The tibial plateau retrieval device of claim 2, wherein: the middle part of the threaded shaft (7) is fixedly sleeved with a polygonal operation block (71).
4. The tibial plateau retrieval device of claim 2, wherein: the left and right sides of stopper (6) are respectively through pivot (61) rotationally install inside opening (5), set up two of the left and right sides of stopper (6) the axis coincidence of pivot (61).
5. The tibial plateau retrieval device of claim 1, wherein: the connecting end of the movable arm (3) is provided with external teeth (4), and the two external teeth (4) are arranged in a protruding manner;
or the connecting end of the movable arm (3) is provided with a clamping groove (8), and the openings of the two clamping grooves (8) are arranged oppositely.
6. The tibial plateau retrieval device of claim 1, wherein: be equipped with two relative U type openings (10) on platform seat (1), two the one end of digging arm (3) is rotationally installed through installation axle (31) respectively inside U type opening (10).
7. The tibial plateau retrieval device of claim 1, wherein: the inner side surface of the movable arm (3) is a plane, and the outer side surface is an arc surface.
8. The tibial plateau retrieval device of claim 7, wherein: the external teeth (4) are formed on the outer side surface of the movable arm (3) in an arc shape.
9. The tibial plateau retrieval device of claim 8, wherein: platform seat (1) is circular, the radius of the arc lateral surface of digging arm (3) with the radius of platform seat (1) is the same, and coincidence about the centre of a circle.
10. The tibial plateau retrieval device of claim 9, wherein: platform seat (1) has top surface (11) and bottom surface (12), connect position (2) to set up on top surface (11), two digging arm (3) are towards the orientation direction extension of bottom surface (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162857.3A CN112971963B (en) | 2021-02-05 | 2021-02-05 | Tibia platform taking-out device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110162857.3A CN112971963B (en) | 2021-02-05 | 2021-02-05 | Tibia platform taking-out device |
Publications (2)
| Publication Number | Publication Date |
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| CN112971963A true CN112971963A (en) | 2021-06-18 |
| CN112971963B CN112971963B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110162857.3A Active CN112971963B (en) | 2021-02-05 | 2021-02-05 | Tibia platform taking-out device |
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| Publication number | Publication date |
|---|---|
| CN112971963B (en) | 2023-07-21 |
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