CN114795383A

CN114795383A - Knee joint revision is with beating and drawing spacing system

Info

Publication number: CN114795383A
Application number: CN202210511180.4A
Authority: CN
Inventors: 江伟; 毛联甲; 贾月梅; 闵信群
Original assignee: Tianyan Medical Equipment Co ltd
Current assignee: Tianyan Medical Equipment Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-07-29

Abstract

The invention discloses a pulling and limiting system for knee joint revision, which includes a pulling device; and an instrument, which is located on one side of the pulling device and is connected with the pulling device; and a limiter, which is connected with the pulling device. connection for limiting the pulling depth of the extractor; wherein the stopper includes a stopper body, which is slidably connected with the extractor; and a button, which is located on one side of the stopper body and is connected to the stopper body. The device body is rotatably connected, one end of the button is provided with locking teeth, corresponding to several teeth provided on the extractor; and an elastic body, one end of the elastic body abuts on the stopper body, and the other end abuts on the button. The pulling limit system disclosed by the invention combines the osteotomy action on the femoral side with the reaming action, uses the extractor to replace the work of the intramedullary rod, determines the amount of osteotomy based on the depth of the reaming hole, and can reduce the number of operation steps. , The technical effect of unified surgical benchmark and improved osteotomy accuracy.

Description

Knee joint revision is with beating and drawing spacing system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a beating and pulling limiting system for knee joint revision.

Background

In recent years, cases of knee revision have increased significantly, one important reason is the dramatic increase in cases of primary total knee replacement, and another factor is that patients who undergo knee replacement become younger and younger, and the way in which patients undergo TKA is performed gradually, it is desired to satisfy the demand for high activity through TKA surgery. There is also a non-negligible factor, body weight, which is particularly evident in western countries, and KurtzS et al, have predicted that the increase in knee revision surgery in the United states will greatly exceed initial total knee replacement/initial total hip replacement/hip revision surgery.

However, in the existing joint revision surgery, certain defects exist:

firstly, in the existing revision surgery, the opening of the distal end of the femur and the proximal end of the tibia is performed by reaming with a reamer, and the formed reamed hole has low matching degree with the appearance of the actually implanted revision prosthesis, so that the prosthesis has difference of implantation height or low stability;

secondly, in the prior art, the depth of the opening is difficult to control, and the matching degree with the prosthesis is low;

in the prior art, the osteotomy action and the reaming action are separated, and both the osteotomy action and the reaming action need to take a mechanical femoral shaft as a reference, namely, two times of reference positioning are needed, so that the defect that the operation steps are more and the osteotomy precision is not high is overcome.

Based on the above, the invention provides a knee joint revision beating and pulling limiting system, which aims to solve the problems in the prior art.

Disclosure of Invention

The invention aims to provide a knee joint revision beating and pulling limiting system to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a knee joint revision is with beating to pull up spacing system includes: a beating and pulling device; the apparatus is positioned on one side of the knockout and the knockout is connected with the knockout; and the limiter is connected with the striking and pulling device and is used for limiting the striking and pulling depth of the striking and pulling device.

Preferably, the stopper includes: the stopper body is connected with the knockout and puller in a sliding manner; the button is positioned on one side of the stopper body and is rotationally connected with the stopper body, and one end of the button is provided with a locking tooth which corresponds to a plurality of teeth arranged on the extractor; and one end of the elastic body is abutted to the stopper body, the other end of the elastic body is abutted to the button, and under the action of the elastic body, the locking teeth are meshed with one or more teeth.

Preferably, the stopper further comprises: the limiting end surface is positioned at one end of the limiter body and connected with the limiter body, and the plane of the limiting end surface is not perpendicular to the axis of the extractor; and the joint mounting hole is positioned on the limiter body and used for connecting the osteotomy joint with the osteotomy device.

Preferably, the extractor further comprises a position mark, and the position mark is positioned on the extractor and corresponds to the limiting end face; the drawing device further comprises a plurality of scales, the scales are located on the drawing device, the limiting device further comprises a plurality of windows, the windows are located on the limiting device body, and the scales correspond to the windows one to one.

Preferably, the instrument comprises a column groove, and the column groove is arranged at the end part of the instrument; the groove is formed in the inner wall of the column groove; the striking and drawing device comprises a rod piece, the rod piece comprises a column protrusion positioned at one end of the rod piece, and the column protrusion is placed in the column groove to connect the striking and drawing device with an instrument; and the first end of the movable piece is rotationally connected with the rod piece, and the second end of the movable piece is placed in the groove, so that the extractor and the instrument are locked.

Preferably, the extractor further comprises: the middle part of the handle is rotationally connected with the middle part of the rod piece, and one end of the handle is a free end; and one end of the transmission rod piece is rotatably connected with the other end of the handle, and the other end of the transmission rod piece is rotatably connected with the third end of the movable piece.

Preferably, the extractor further comprises an interference piece, the interference piece is arranged on the rod piece, and when force is applied to the handle, the middle of the handle and the interference piece generate an interference effect.

Preferably, the rod member includes: the first accommodating cavity is formed in the rod piece, extends to be communicated with the outside of the transmission rod piece, and is arranged in the first accommodating cavity; and the second holds the chamber, and the second holds the chamber and sets up in the post is protruding, and the second holds the one end in chamber and extends to and first chamber intercommunication that holds, and the other end extends to and post protruding outside intercommunication, and the moving part extends to the second and holds the intracavity to extend to the post outside protruding.

Preferably, the rod further comprises: a grip portion having a curved structure and having a space between the grip portion and the handle; and one or more lightening holes, wherein the lightening holes are formed in the holding part.

Preferably, the knockout punch also comprises a knocking block, and the knocking block is positioned at one end of the rod piece far away from the column protrusion and is connected with the rod piece.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the beating and pulling limiting system disclosed by the invention, the distal end of the femur and the proximal end of the tibia are holed by combining the beating and pulling device with the file body, wherein the file body is consistent with the prosthesis at the file hole in shape, so that the file hole which is consistent with the prosthesis in shape can be obtained, and compared with the traditional reaming mode, the file hole mode in the application can realize the stability of prosthesis implantation and the accuracy of prosthesis implantation height;

2. the beating and pulling limiting system disclosed by the invention is provided with the limiter, and the limiter can be abutted against the end surface of the far end of the femur along with the beating and pulling device along with the fact that the beating and pulling device extends into a bone, so that the continuous penetration of the beating and pulling device is limited, and the opening depth can be accurately controlled;

3. the punching and pulling limiting system disclosed by the invention can combine the osteotomy action with the filing action, unifies the reference, improves the osteotomy precision, specifically, the filing tool is placed into a medullary cavity to coincide with a mechanical shaft of a femur, replaces the action of an intramedullary rod in the osteotomy action, and simultaneously determines the osteotomy length by taking the filing depth as the reference, namely, the puncher is used for replacing the operation of the intramedullary rod; when the osteotomy is performed, the osteotomy joint is arranged on the joint mounting hole, the osteotomy device is arranged on the osteotomy joint, the osteotomy device is fixed on the bone, and instruments except the osteotomy device are dismounted for the osteotomy operation, so that the mechanical axis, the eversion angle and the osteotomy amount do not need to be repositioned and searched, and the technical effects of reducing operation steps, unifying operation standards and improving osteotomy precision are achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a front view of an impact and extraction limiting system for revision of a knee joint in an embodiment of the present invention;

FIG. 2 is a front view of a drawer in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a drawer in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of an instrument according to an embodiment of the present invention;

FIG. 5 is a front view of a retainer in an embodiment of the present invention;

FIG. 6 is a cross-sectional view of an elevation view of an embodiment of the present invention;

in the figure:

the knock-out tool comprises a knock-out tool 1, a rod 11, teeth 111, scales 112, a first accommodating cavity 113, a holding part 114, a lightening hole 115, a column projection 12, a second accommodating cavity 121, a movable piece 13, a handle 14, a transmission rod 15, an interference piece 16, a knocking block 17, a knocking-in surface 171, a knocking-back surface 172 and a position mark 18;

the instrument 2, the column groove 21, the groove 22;

the stopper 3, the stopper body 31, the limiting end face 32, the button 33, the locking tooth 331, the hanging lug 332, the elastic body 34, the window 35, the joint mounting hole 36 and the shaft pin 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the current knee joint revision surgery, a femur and a tibia are mainly reamed by a reamer, and then a prosthesis is placed in the reamed holes and compacted, or the prosthesis is fixed by bone cement. However, holes are formed at the distal end of the femur and the proximal end of the tibia by using a reaming method, so that the shape of the reaming is necessarily a cylindrical hole structure, but the prosthesis implanted into the reaming part is an elliptic cylinder-like structure, i.e., the shape of the reaming and the prosthesis is difficult to completely fit, so that the reaming and the prosthesis are possibly different in implantation height or stability due to the difference of bones of patients, and certain risks are brought to the operation; in addition, the depth of the existing reaming hole is difficult to control accurately, the implantation height is also inaccurate or the stability is poor, and therefore, how to control the depth of the opening hole at the knee joint is also the key for the success of the operation.

Based on the above, the invention provides an embodiment, in particular to a beating and pulling limiting system for knee joint revision, which is used for solving the defects in the prior art.

Specifically, as shown in fig. 1, the beating and pulling limiting system comprises a beating and pulling device 1, wherein the beating and pulling device 1 is used as a transmission piece of beating and pulling force and used for receiving the beating and pulling force and transmitting the beating and pulling force to a file body, so that the file body acts on the knee joint to file a hole; the knee joint prosthesis comprises a prosthesis body and is characterized by further comprising an instrument 2, wherein the instrument 2 is located on one side of the extractor 1 and connected with the extractor 1 to directly act on a knee joint, in the embodiment, the instrument 2 is preferably a file body, the shape of the file body is consistent with that of the prosthesis at the position of a file hole, so that the file hole which is consistent with the shape of the prosthesis is obtained, and compared with the traditional reaming mode, the prosthetic implantation stability and the prosthesis implantation high accuracy can be achieved by the aid of the file hole mode in the application.

Furthermore, in order to control the depth of the filing hole, as shown in fig. 1, the beating and pulling limiting system further comprises a limiter 3, wherein the limiter 3 is connected with the beating and pulling device 1 and used for limiting the beating and pulling depth of the beating and pulling device 1, namely, the limiter 3 can be abutted to the end face of the distal end of the femur along with the beating and pulling device 1 and limits the continuation of the beating and pulling device 1 to go deep, so that the opening depth can be accurately controlled.

Further, as shown in fig. 1 and 5, the stopper 3 includes a stopper body 31, and the stopper body 31 is slidably connected to the extractor 1, in this embodiment, the stopper body 31 is preferably a square tubular structure, and is sleeved on the extractor 1 and can translate along the extractor 1 to adjust the limiting depth.

Further, after the depth of the stopper 3 is adjusted, the stopper 3 needs to be relatively fixed to the extractor 1 to really realize a limiting function, based on this, as shown in fig. 2 and 5 to 6, the stopper 3 further includes a button 33, the button 33 is located on one side of the stopper body 31 and is rotatably connected to the stopper body 31, one end of the button 33 is provided with a locking tooth 331, the locking tooth 331 corresponds to a plurality of teeth 111 arranged on the extractor 1, in this embodiment, preferably, two lugs 332 extend out from the middle of the button 33, one side of the stopper body 31 is fixedly provided with a shaft pin 37, and the shaft pin 37 passes through the two lugs 332, so that the lugs 332 can rotate along the shaft pin 37, that is, the button 33 is rotatably connected to the stopper body 31; the stopper 3 further includes an elastic body 34, one end of the elastic body 34 abuts against the stopper body 31, the other end abuts against the button 33, and under the action of the elastic body 34, the locking teeth 331 are engaged with one or more teeth 111, in this embodiment, the elastic body 34 is preferably a torsion spring, wherein the torsion spring is sleeved on the shaft pin 37 and located between the two hanging lugs 332, one end of the torsion spring abuts against the side portion of the stopper body 31, and the other end abuts against the middle portion of the button 33, so as to generate a pre-tightening force to the button 33, so that the locking teeth 331 are engaged with the teeth 111, and the stopper 3 and the extractor 1 can be relatively fixed.

Further, in the conventional knee joint revision surgery, an intramedullary canal reaming action is performed after the osteotomy action is required to be completed on the femur side, and the osteotomy amount and the osteotomy valgus angle are required to be considered when the osteotomy action is performed, specifically, an intramedullary rod is inserted into the intramedullary canal, an osteotomy joint and a femur far-end osteotomy block are mounted at the femur far end, then the osteotomy action is performed at the femur far end, the intramedullary rod is withdrawn after the osteotomy action is completed, and the reaming action is to perform tapping from the femur far end through a reamer, so that it can be seen that in the conventional surgical steps, the osteotomy action and the reaming action are separated, but the osteotomy action and the reaming action both require the femoral mechanical shaft as a reference to perform the surgical action, so that the two actions are linked, and similarly, the filing action in the present application also requires the femoral mechanical shaft as a reference to perform the action; based on the above, the bone cutting action and the filing action are combined in consideration of the application, the bone cutting precision is improved by a unified standard, the core of the bone cutting instrument is that the filing tool needs to be placed into a medullary cavity and is superposed with a mechanical shaft of a femur, the action of an intramedullary rod in the bone cutting action can be replaced, the depth of a filing hole is related to the bone cutting length, namely, the extractor 1 in the application is used for replacing the work of the intramedullary rod, the bone cutting amount is determined by taking the depth of the filing hole as a standard, and the technical effects of reducing operation steps, unifying operation standards and improving the bone cutting precision can be realized; based on this, as shown in fig. 5 to 6, the limiter 3 includes a limiting end face 32, the limiting end face 32 is located at one end of the limiter body 31 and connected to the limiter body 31, and the plane of the limiting end face 32 is not perpendicular to the axis of the extractor 1, in this embodiment, the limiting end face 32 is preferably integrally formed with the limiter body 31 and is an end face platform of a square tubular structure, the plane of the limiting end face 32 is a plane α, and the plane perpendicular to the axis of the extractor 1 is a plane β, an included angle between the plane α and the plane β is preferably 5 ° to 7 °, the included angle is an eversion angle, and when the extractor 1 extends into the medullary cavity to a proper position, the limiting end face 32 is attached to the end face of the distal end of the femur to realize a limiting function; meanwhile, the limiter 3 further comprises two connector mounting holes 36, the connector mounting holes 36 are located on the limiter body 31 and used for connecting the osteotomy connector and the osteotomy device, preferably two connector mounting holes 36 are located on two sides of the limiter body 31 respectively, a central connecting line of the two connector mounting holes 36 is parallel to the plane alpha, after the filing hole is completed, the osteotomy connector is mounted on the connector mounting holes 36, the osteotomy device is mounted on the osteotomy connector, the osteotomy device is fixed on a bone, the extractor 1, the instrument 2, the limiter 3 and the osteotomy connector are dismounted, and the osteotomy operation is carried out.

Further, in order to clarify the depth of the filing hole and the bone cutting amount, as shown in fig. 2 and 5, the extractor 1 further comprises a position mark 18, wherein the position mark 18 is an extending groove body formed on the extractor 1, and the extending direction of the groove body is parallel to the limiting end surface 32; the extractor 1 further comprises a plurality of scales 112, the scales 112 are located on the extractor 1 and distributed in the extending direction of the extractor 1, in this embodiment, the scales 112 preferably comprise 0-bit scale, -2-bit scale, + 2-bit scale and + 4-bit scale, wherein the 0-bit scale refers to the reference amount of the depth of the file hole, and the rest of the scales refer to the reference amount of the depth of the file hole and can be adjusted on the basis of the reference amount; stopper 3 still includes a plurality of windows 35, window 35 is located stopper body 31, a plurality of scales 112 and a plurality of windows 35 one-to-one, when spacing terminal surface 32 on stopper 3 coincides with position mark 18, one of them window 35 corresponds with 0 position scale, it is the benchmark volume to show the file hole degree of depth this moment, when needing to adjust the file hole degree of depth, make certain window correspond with its scale that corresponds, confirm the file hole degree of depth with the convenient art person, in this embodiment, window 35 is preferably the semicircle fluting that is located stopper body 31 tip.

Furthermore, as the instrument 2 has various specifications and models, the file body needs to be replaced step by step in the hole filing process to achieve the most appropriate hole filing, so that the instrument 2 needs to be replaced for many times in the hole filing process, and based on the needs, as shown in fig. 3-4, the effect of quick disassembly and stable connection is needed between the instrument 2 and the extractor 1, so that the instrument 2 comprises a column groove 21, and the column groove 21 is arranged at the end part of the instrument 2; the column groove is characterized by further comprising a groove 22, wherein the groove 22 is formed in the inner wall of the column groove 21; the striking and drawing device 1 comprises a rod piece 11, the rod piece 11 comprises a column protrusion 12 positioned at one end of the rod piece, and the column protrusion 12 is placed in a column groove 21 to connect the striking and drawing device 1 with the apparatus 2; the mechanical wrench is characterized by further comprising a movable piece 13, wherein the first end of the movable piece 13 is rotatably connected with the rod piece 11, the second end of the movable piece 13 is placed into the groove 22, so that the wrench 1 and the device 2 are locked, namely the rod piece 11 and the movable piece 13 jointly form three-dimensional clamping on the device 2 to generate stable clamping force, and when the rod piece 11 and the movable piece 13 need to be disassembled, the rod piece 11 and the movable piece 13 can be separated from the device 2.

Further, in order to realize the quick connection and quick detachment between the extractor 1 and the apparatus 2, as shown in fig. 3 to 4, the extractor 1 further includes a handle 14, the middle of the handle 14 is rotatably connected with the middle of the rod 11, and one end of the handle 14 is a free end; the clamping device further comprises a transmission rod piece 15, one end of the transmission rod piece 15 is rotatably connected with the other end of the handle 14, the other end of the transmission rod piece 15 is rotatably connected with the third end of the movable piece 13, when clamping force needs to be provided, force is applied to the free end of the handle 14, the handle 14 is enabled to rotate along the middle portion of the handle 14, the other end of the handle drives the transmission rod piece 15 to displace, then the transmission rod piece 15 drives the movable piece 13 to rotate along the first end of the movable piece, and the second end of the movable piece 13 is enabled to be placed in the groove 22; when disassembly is desired, an opposing force is applied to the free end of handle 14.

Furthermore, during the pulling process, both hands need to be released, so that no continuous force can be applied to the free end of the handle 14, and therefore a force is needed to lock the clamping force, and therefore, as shown in fig. 3, the drawer 1 further includes an interference member 16, the interference member 16 is disposed on the rod 11, and when a force is applied to the handle 14, the middle portion of the handle 14 and the interference member 16 generate an interference effect, in this embodiment, the interference member 16 is preferably a pin fixed on the rod 11, and when the handle 14 is closed, the interference force is generated to the handle 14.

Furthermore, in order to make the extractor 1 more compact and suitable for a narrow space, as shown in fig. 3, the rod 11 further includes a first accommodating cavity 113, the first accommodating cavity 113 is disposed in the rod 11, the first accommodating cavity 113 extends to communicate with the outside of the transmission rod 15, the transmission rod 15 is disposed in the first accommodating cavity 113, one end of the handle 14 is rotatably connected to the first accommodating cavity 113 through a pin, the first end of the movable member 13 is rotatably connected to the first accommodating cavity 113 through a pin, and the interference member 16 is also a pin fixed in the first accommodating cavity 113; still including the second hold chamber 121, the second holds the chamber 121 and sets up in the post is protruding 12, and the second holds the one end of chamber 121 and extends to and first hold chamber 113 intercommunication, the other end extend to with the protruding 12 outside intercommunication of post, the second end of moving part 13 extends to the second and holds in the chamber 121 to extend to the post is protruding 12 outside.

Furthermore, for facilitating the holding, as shown in fig. 2 to 3, the rod 11 further includes a holding portion 114, and the holding portion 114 is a curved structure, so that a space is provided between the holding portion 114 and the handle 14 to facilitate the application of force to the handle 14.

Furthermore, for reducing weight, as shown in fig. 2 to 3, the rod 11 further includes one or more weight-reducing holes 115, and in this embodiment, the weight-reducing holes 115 are preferably opened on the holding portion 114.

Further, as shown in fig. 2, the knockout 1 further comprises a knocking block 17, the knocking block 17 is located at one end of the rod 11 far away from the column protrusion 12 and connected with the rod 11, and when the rasping hole is punched, the knocking block 17 is used for bearing force, preferably, the knocking block 17 comprises a knocking surface 171 far away from the rod 11 and a knocking back surface 172 close to the rod 11, when the rasping hole is punched, force is applied to the knocking in surface 171, and when the knockout and the femoral rasp are replaced in the operation, force is applied to the knocking back surface 172.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. a knee joint revision is used to pull out the limiting system, it is characterized in that, comprise:

Puller(1);

And an instrument (2), the instrument (2) is located on one side of the extractor (1), and is connected with the extractor (1);

and a limiter (3), the limiter (3) is connected with the pulling device (1), and is used for limiting the pulling depth of the pulling device (1).

2. A kind of pulling and pulling limiting system for knee joint revision according to claim 1, wherein the limiter (3) comprises:

a stopper body (31), the stopper body (31) is slidably connected with the puller (1);

and a button (33), the button (33) is located on one side of the stopper body (31) and is rotatably connected with the stopper body (31), and one end of the button (33) is provided with a lock teeth (331), the locking teeth (331) correspond to a plurality of teeth (111) provided on the extractor (1);

and an elastic body (34), one end of the elastic body (34) abuts on the stopper body (31), the other end abuts on the button (33), and the elastic body (34) Under the action of the locking teeth (331), the locking teeth (331) are engaged with one or more of the teeth (111).

3. A kind of knockout limiting system for knee joint revision according to claim 2, characterized in that, the limiter (3) further comprises:

A limiter end face (32), the limiter end face (32) is located at one end of the limiter body (31), and is connected to the limiter body (31), and the limiter end face (32) is located at one end of the limiter body (31). The plane is not perpendicular to the axis of the puller (1);

and a joint installation hole (36), the joint installation hole (36) is located on the stopper body (31), and is used for connecting the osteotomy joint and the osteotomy device.

4. A kind of knee joint revision according to claim 3, it is characterized in that,

The puller (1) further comprises a position marker (18), and the position marker (18) is located on the puller (1) and corresponds to the limit end face (32);

The puller (1) further includes a plurality of scales (112), the scales (112) are located on the puller (1), and the stopper (3) further includes a plurality of viewing windows (35) , the viewing window (35) is located on the stopper body (31), and a plurality of the scales (112) are in one-to-one correspondence with a plurality of the viewing windows (35).

5 . The pulling and pulling limiting system for knee joint revision according to any one of claims 1 to 4 , wherein,

The instrument (2) includes a column groove (21), the column groove (21) is opened at the end of the instrument (2); and a groove (22), the groove (22) is opened in the on the inner wall of the column groove (21);

The puller (1) includes a rod (11), the rod (11) includes a stud (12) located at one end thereof, and the stud (12) is inserted into the column groove (21) ), connect the extractor (1) with the instrument (2); and a movable piece (13), the first end of the movable piece (13) is rotatably connected with the rod (11), The second end of the movable piece (13) is placed in the groove (22), so that the extractor (1) and the instrument (2) are locked.

6. A kind of knocking and pulling limiting system for knee joint revision according to claim 5, is characterized in that, described pulling device (1) also comprises:

a handle (14), the middle part of the handle (14) is rotatably connected with the middle part of the rod (11), and one end of the handle (14) is a free end;

and a transmission rod (15) (11), one end of the transmission rod (15) is rotatably connected with the other end of the handle (14), and the other end of the transmission rod (15) is connected with the movable member The third end of (13) is connected in rotation.

7 . The extraction limiting system for knee joint revision according to claim 6 , wherein the extraction device ( 1 ) further comprises an interference piece ( 16 ), and the interference piece ( 16 ) On the rod (11), when a force is applied to the handle (14), the middle part of the handle (14) and the interference member (16) interfere.

8. The pulling-out limiting system for knee joint revision according to claim 7, wherein the rod (11) comprises:

a first accommodating cavity (113), the first accommodating cavity (113) is opened in the rod (11), and the first accommodating cavity (113) extends to the outside of the transmission rod (15) connected, the transmission rod (15) and the movable member (13) are both placed in the first accommodating cavity (113);

and a second accommodating cavity (121), the second accommodating cavity (121) is opened in the stud protrusion (12), and one end of the second accommodating cavity (121) extends to the first accommodating cavity (113) is communicated, the other end extends to communicate with the outside of the cylindrical protrusion (12), the movable member (13) extends into the second accommodating cavity (121), and extends to the cylindrical protrusion (12) outside.

9. The pulling-out limiting system for knee joint revision according to claim 6, wherein the rod (11) further comprises:

a holding part (114), the holding part (114) is of a curved structure, so that there is a space between the holding part (114) and the handle (14);

and one or more weight-reduction holes (115), the weight-reduction holes (115) are opened on the handle portion (114).

10. A kind of knockout limiting system for knee joint revision according to claim 5, characterized in that, the knockout device (1) further comprises a knocking block (17), the knocking block ( 17) is located at one end of the rod member (11) away from the cylindrical protrusion (12), and is connected with the rod member (11).