Disclosure of Invention
The invention mainly aims to provide a femoral condyle prosthesis taking-out device which aims to solve the problem that a knee joint prosthesis in the related art is separated in a shaking mode, so that fracture of a distal femur is easy to cause.
In order to achieve the above object, the present invention provides a femoral condyle prosthesis removal device, comprising: a base; a first clamping jaw and a second clamping jaw, wherein the distance between the first clamping jaw and the second clamping jaw is adjustably arranged on the base body; a third jaw movably disposed on the base along a line of symmetry parallel to the first jaw and the second jaw; the ejector rod is movably arranged on the base body in a penetrating way.
Further, the base member includes first base and second base, and first base and second base all overlap and establish on the ejector pin, and first base is located the front end of second base, and first clamping jaw and second clamping jaw all are connected with first base, and third clamping jaw is connected with second base.
Further, the femoral condyle prosthesis removal device also includes an adjustment assembly including a first adjustment structure disposed between the first jaw and the second base and a second adjustment structure disposed between the second jaw and the second base.
Further, the first adjusting structure comprises a first adjusting arm and a first elastic piece, the first end of the first adjusting arm is movably connected with the first clamping jaw, the middle part of the first adjusting arm is hinged with the second base, and the first elastic piece is arranged between the second base and the second end of the first adjusting arm; and/or the second adjusting structure comprises a second adjusting arm and a second elastic piece, the first end of the second adjusting arm is movably connected with the second clamping jaw, the middle part of the second adjusting arm is hinged with the second base, and the second elastic piece is arranged between the second base and the second end of the second adjusting arm.
Further, the second base includes main part, first connecting portion, second connecting portion, third connecting portion and fourth connecting portion, first connecting portion and second connecting portion set up relatively in the first end of main part, third connecting portion and fourth connecting portion set up relatively in the second end of main part, the middle part of first adjusting arm is articulated with first connecting portion, the middle part of second adjusting arm is articulated with second connecting portion and is connected, first elastic component sets up between the second end of third connecting portion and first adjusting arm, the second elastic component sets up between the second end of fourth connecting portion and second adjusting arm.
Further, in the direction from the first base to the second base, the distance between the third connecting portion and the fourth connecting portion gradually increases.
Further, the femoral condyle prosthesis removal device also includes a first guide structure disposed between the first base and the first jaw, and a second guide structure disposed between the first base and the second jaw.
Further, the second base still includes the mounting bracket, is provided with the bar hole on the mounting bracket, and the bar hole extends along the direction of perpendicular to first base to second base, and the third clamping jaw wears to establish in the bar hole and can remove in the bar hole.
Further, still be provided with first gag lever post and second gag lever post on the mounting bracket, first gag lever post and second gag lever post set up in the bar downthehole along bar hole extending direction interval, and the third clamping jaw wears to establish between first gag lever post and second gag lever post, in the direction of first base to second base, has the interval between first gag lever post and the second gag lever post.
Further, still be provided with spacing piece on the mounting bracket, be provided with the spacing groove on the third clamping jaw, the first end of spacing piece is connected on the mounting bracket, and the second end of spacing piece inserts to the spacing inslot.
Further, the femoral condyle prosthesis removal device also includes a first tapping plate connected to the third jaw; the femoral condyle prosthesis taking-out device further comprises a handle, wherein the handle is connected with the ejector rod, and a second knocking plate is arranged at one end, far away from the ejector rod, of the handle; the ejector rod comprises a screw rod and an ejector cap, the ejector cap is connected with the screw rod, and the ejector cap is positioned among the first clamping jaw, the second clamping jaw and the third clamping jaw.
By applying the technical scheme of the application, the distance between the first clamping jaw and the second clamping jaw is adjustable, the third clamping jaw is movably arranged on the base along the symmetrical line parallel to the first clamping jaw and the second clamping jaw, and the ejector rod is movably arranged on the base in a penetrating way. Through foretell setting, first clamping jaw, second clamping jaw and third clamping jaw all hook on knee joint prosthesis, and the ejector pin can push away knee joint prosthesis, and then makes first clamping jaw, second clamping jaw and third clamping jaw can be connected with knee joint prosthesis steadily, pulls after the connection again and then can realize taking out of knee joint prosthesis. Meanwhile, due to the adoption of the first clamping jaw, the second clamping jaw and the third clamping jaw, the stress of the knee joint prosthesis is more uniform when the knee joint prosthesis is pulled, and the femur is not damaged easily. Therefore, the technical scheme of the application effectively solves the problem that the knee joint prosthesis in the related art is separated in a shaking way, so that the fracture of the distal femur is easy to cause.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1, 3,4, and 5, in the present embodiment, the femoral condyle prosthesis removal device includes: base 10, first jaw 21, second jaw 22, third jaw 23, and ejector bar 30. The distance between the first jaw 21 and the second jaw 22 is adjustably arranged on the base body 10. The third jaw 23 is movably arranged on the base body 10 along a line of symmetry parallel to the first jaw 21 and the second jaw 22. Ejector rod 30 is movably disposed through base 10.
With the technical solution of the present embodiment, the first clamping jaw 21 and the second clamping jaw 22 are arranged on the base body 10 with adjustable distance, the third clamping jaw 23 is arranged on the base body 10 movably along a symmetry line parallel to the first clamping jaw 21 and the second clamping jaw 22, and the ejector rod 30 is arranged on the base body 10 in a penetrating manner. Through the above arrangement, the first clamping jaw 21, the second clamping jaw 22 and the third clamping jaw 23 are hooked on the knee joint prosthesis, the ejector rod 30 can eject the knee joint prosthesis, and then the first clamping jaw 21, the second clamping jaw 22 and the third clamping jaw 23 can be stably connected with the knee joint prosthesis, and after connection, pulling is carried out, so that the knee joint prosthesis can be taken out. Meanwhile, due to the adoption of the first clamping jaw 21, the second clamping jaw 22 and the third clamping jaw 23, the knee joint prosthesis is more uniformly stressed when being pulled, and the femur is not damaged easily. Therefore, the technical scheme of the embodiment effectively solves the problem that the knee joint prosthesis in the related art is separated in a shaking way, so that the fracture of the distal femur is easy to cause.
Specifically, in the present embodiment, the first jaw 21 and the second jaw 22 move in a translational manner.
As shown in fig. 1, 3, 5 and 6, in the present embodiment, the base 10 includes a first base 11 and a second base 12, the first base 11 and the second base 12 are both sleeved on the ejector rod 30, the first base 11 is located at the front end of the second base 12, the first clamping jaw 21 and the second clamping jaw 22 are both connected with the first base 11, and the third clamping jaw 23 is connected with the second base 12. The arrangement of the first base 11 and the second base 12 can make the positions of the first clamping jaw 21, the second clamping jaw 22 and the third clamping jaw 23 more stable and convenient for adjustment.
As shown in fig. 1, 3, 5 and 6, in this embodiment, the femoral condyle prosthesis removal device further comprises an adjustment assembly 40, the adjustment assembly 40 comprising a first adjustment structure 41 and a second adjustment structure 42, the first adjustment structure 41 being disposed between the first jaw 21 and the second base 12, the second adjustment structure 42 being disposed between the second jaw 22 and the second base 12. The first adjustment structure 41 is capable of adjusting the position of the first jaw 21 and the second adjustment structure 42 is capable of adjusting the position of the second jaw 22.
As shown in fig. 1, 3, 5 and 6, in the present embodiment, the first adjusting structure 41 includes a first adjusting arm 411 and a first elastic member 412, a first end of the first adjusting arm 411 is movably connected with the first clamping jaw 21, a middle portion of the first adjusting arm 411 is hinged with the second base 12, and the first elastic member 412 is disposed between the second base 12 and a second end of the first adjusting arm 411; during the swinging process of the first adjusting arm 411, the first end of the first adjusting arm 411 can push against the first clamping jaw 21, so that the first clamping jaw 21 moves. Meanwhile, the first end of the first adjusting arm 411 is movably connected with the first clamping jaw 21, so that the first adjusting arm 411 cannot be blocked.
Specifically, the aperture in the first jaw 21 has a size greater than the cross-sectional area of the hinge post at the first end of the first adjustment arm 411.
As shown in fig. 1, 3, 5 and 6, in the present embodiment, the second adjusting structure 42 includes a second adjusting arm 421 and a second elastic member 422, a first end of the second adjusting arm 421 is movably connected with the second clamping jaw 22, a middle portion of the second adjusting arm 421 is hinged with the second base 12, and the second elastic member 422 is disposed between the second base 12 and a second end of the second adjusting arm 421. During the swinging process of the second adjusting arm 421, the second end of the second adjusting arm 421 can push against the second clamping jaw 22, so that the second clamping jaw 22 moves. Meanwhile, the second end of the second adjusting arm 421 is movably connected with the second clamping jaw 22, so that the second adjusting arm 421 cannot be blocked.
Specifically, the aperture in the second jaw 22 has a size greater than the cross-sectional area of the hinge post at the second end of the second adjustment arm 421.
As shown in fig. 1, 3, 5 and 6, in the present embodiment, the second base 12 includes a main body 121, a first connecting portion 122, a second connecting portion 123, a third connecting portion 124 and a fourth connecting portion 125, the first connecting portion 122 and the second connecting portion 123 are relatively disposed at a first end of the main body 121, the third connecting portion 124 and the fourth connecting portion 125 are relatively disposed at a second end of the main body 121, a middle portion of the first adjusting arm 411 is hinged to the first connecting portion 122, a middle portion of the second adjusting arm 421 is hinged to the second connecting portion 123, a first elastic member 412 is disposed between the third connecting portion 124 and a second end of the first adjusting arm 411, and a second elastic member 422 is disposed between the fourth connecting portion 125 and a second end of the second adjusting arm 421. The above arrangement can make the connection of the first adjustment arm 411 and the second adjustment arm 421 more stable.
As shown in fig. 1,3, 5 and 6, in the present embodiment, the distance between the third connection portion 124 and the fourth connection portion 125 gradually increases in the direction from the first base 11 to the second base 12. The above arrangement can make the position stability of the first elastic member 412 and the second elastic member 422 better.
As shown in fig. 1, 3,5 and 6, in the present embodiment, the included angle between the third connecting portion 124 and the fourth connecting portion 125 is smaller than the included angle between the second end of the first adjusting arm 411 and the second end of the second adjusting arm 421. This facilitates the fixing of the first elastic member 412 and the second elastic member 422 on the one hand, and enables a large space between the first adjustment arm 411 and the second adjustment arm 421 and the second base 12 on the other hand, so that the first adjustment arm 411 and the second adjustment arm 421 can swing.
As shown in fig. 1 to 4, in the present embodiment, the femoral condyle prosthesis removal device further includes a first guide structure 51 and a second guide structure 52, the first guide structure 51 being disposed between the first base 11 and the first jaw 21, and the second guide structure 52 being disposed between the first base 11 and the second jaw 22. The first guide structure 51 and the second guide structure 52 can guide the first clamping jaw 21 and the second clamping jaw 22, and further enable the first clamping jaw 21 and the second clamping jaw 22 to be close to and far away from each other.
Specifically, the first guide structure 51 and the second guide structure 52 are both guide rods.
As shown in fig. 1, 2, 4, 5 and 7, in the present embodiment, the second base 12 further includes a mounting frame 126, a strip-shaped hole 1261 is provided on the mounting frame 126, the strip-shaped hole 1261 extends in a direction perpendicular to the first base 11 to the second base 12, and the third clamping jaw 23 is disposed through the strip-shaped hole 1261 and is capable of moving in the strip-shaped hole 1261. The third clamping jaw 23 is arranged in the strip-shaped hole 1261 in a penetrating mode, and therefore the moving direction of the third clamping jaw 23 can be further fixed.
As shown in fig. 1,2, 4, 5 and 7, in the present embodiment, the mounting frame 126 is further provided with a first stop post 1262 and a second stop post 1263, the first stop post 1262 and the second stop post 1263 are disposed in the bar hole 1261 at intervals along the extending direction of the bar hole 1261, the third clamping jaw 23 is inserted between the first stop post 1262 and the second stop post 1263, and a space is provided between the first stop post 1262 and the second stop post 1263 in the direction from the first base 11 to the second base 12. The first stop post 1262 and the second stop post 1263 can stop the third clamping jaw 23, so that the position of the third clamping jaw 23 is stable, and the third clamping jaw 23 can be movably arranged between the first stop post 1262 and the second stop post 1263 in a penetrating manner, so that the third clamping jaw 23 can pull the knee prosthesis.
As shown in fig. 1,2, 4,5 and 7, in this embodiment, the mounting frame 126 is further provided with a limiting plate 1264, the third clamping jaw 23 is provided with a limiting groove 231, a first end of the limiting plate 1264 is connected to the mounting frame 126, and a second end of the limiting plate 1264 is inserted into the limiting groove 231. The limiting piece 1264 can further limit the third clamping jaw 23, so that the moving direction of the third clamping jaw 23 is more stable. Specifically, the stopper 1264 is fixed to the mounting frame 126, and the distance between the stopper 1264 and the main body 121 increases gradually in the direction from the first base 11 to the second base 12. The width of the stopper 1264 gradually decreases from the approaching of the mounting frame 126 to the separating of the mounting frame 126.
The third jaw 23 can press the stop tab 1264 to swing up and down, which can better fit the knee prosthesis.
As shown in fig. 1 to 7, in the present embodiment, the femoral condyle prosthesis removal device further includes a first striking plate 61, the first striking plate 61 being connected to the third jaw 23; the femoral condyle prosthesis extraction device further comprises a handle 62, wherein the handle 62 is connected with the ejector rod 30, and a second knocking plate 621 is arranged at one end of the handle 62 away from the ejector rod 30; ejector rod 30 includes a screw 31 and an ejector cap 32, ejector cap 32 being connected to screw 31, ejector cap 32 being located between first jaw 21, second jaw 22 and third jaw 23. The first knocking plate 61 and the second knocking plate 621 can be matched and knocked, so that the knee joint prosthesis is pulled, the push cap 32 can be abutted with the knee joint prosthesis, and the femoral condyle prosthesis taking-out device is connected with the knee joint prosthesis more stably.
In this embodiment, be provided with coupling assembling between handle 62 and ejector pin 30, coupling assembling includes spread groove and connecting block, and the spread groove sets up at the tip of ejector pin 30 towards handle 62, and the connecting block setting is at the tip of handle 62 towards ejector pin 30, and the lateral part of spread groove is dodged the breach, and the connecting block inserts to the spread groove through the notch of spread groove, dodges the breach and can dodge handle 62.
Specifically, the femoral condyle prosthesis extraction device of this embodiment operates as follows:
1. rotating ejector rod 30 counterclockwise to place the femoral condyle prosthesis removal device in a maximum released state;
2. pressing the first adjusting arm 411 and the second adjusting arm 421, so that the first clamping jaw 21 and the second clamping jaw 22 are separated, the first clamping jaw 21 and the second clamping jaw 22 are attached to the joint of the knee joint prosthesis and the bone surface, and the first clamping jaw 21 and the second clamping jaw 22 are knocked into the interior between the knee joint prosthesis and the bone surface through a hammering device;
3. Rotating ejector rod 30 clockwise to push top cap 32 against the intercondylar space of the femoral condyle, ensuring a tight compression state;
4. pushing and pulling the third clamping jaw 23 to enable the third clamping jaw 23 to be in contact with the upper edge of the femoral condyle, swinging the third clamping jaw 23, adjusting the cutting angle, lightly hammering the first knocking plate 61 to enable the upper inclined surface of the femoral condyle to separate from the bone surface;
5. The handle is connected to the ejector rod and the second striking plate 621 is hammered with a bone hammer to remove the prosthesis (a sliding hammer may also be connected to remove the prosthesis). If the prosthesis is jammed in the extraction process, the first knocking plate 61 can be knocked at different nodes according to the situation, the position of the prosthesis can be adjusted, and the situation that the upper inclined surface of the prosthesis is not completely separated and the bone surface is peeled off can be assisted.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.