CN217390971U - Prosthetic implant device - Google Patents

Abstract

The utility model relates to a prosthetic implantation device for implant human body with shin bone liner prosthesis, including support, movable handle and push rod: the bracket comprises a base part, the far end of the base part is connected with a barb matched with a clamping groove on the tibial tray prosthesis, and the near end of the base part is bent and extended to form a fixed handle; the movable handle is rotatably connected with the bracket; the push rod is pushed into the tibia liner prosthesis and movably arranged on the base part, and the near end of the push rod is movably connected with the movable handle; the movable handle is used for driving the far end of the push rod to be far away from or close to the tibia gasket prosthesis; thereby simplifying the structure and the operation process of the tibial gasket prosthesis implanting device, ensuring the stability of the implanted prosthesis and avoiding the damage of the tibial gasket prosthesis caused by knocking.

Description

Prosthetic implant device

Technical Field

The utility model relates to a medical auxiliary instrument field, in particular to a prosthetic implantation device for installing tibial gasket prosthesis.

Background

The implantation of a tibial gasket prosthesis is an important step in a total knee replacement operation, and the suitability of the tibial gasket prosthesis for implantation directly influences the coordinated motion between a femoral prosthesis and the tibial prosthesis and finally influences the effect of the operation.

Because the tibia liner prosthesis needs to be locked with the tibia support prosthesis in shape and position to ensure the stability of the tibia side prosthesis, the tibia liner prosthesis is generally driven into a locking groove of the tibia support prosthesis in a knocking mode in the market, the types of striking tools are different, but the implanting modes are knocking implantation. This type of implantation, while straightforward, can easily damage the tibial insert prosthesis, particularly if the tibial insert and tibial tray prosthesis are not in perfect apposition. Generally, the tibial pad is implanted after the tibial tray prosthesis and the femoral condyle prosthesis are implanted, so that when the tibial pad prosthesis is knocked by a hammer to be implanted, the mounted femoral condyle prosthesis and the mounted tibial tray prosthesis are easily displaced due to large force, and the operation effect is greatly influenced. And the operation of the implantation mode is inconvenient.

Therefore, there is a need to change the manner in which tibial inserts are implanted to provide a prosthetic implant device that can be implanted into the tibial insert without requiring tapping.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prosthetic implantation device through changing shin bone liner false body implantation mode, abandons the mode of beating, adopts lever principle, inside usable push rod slowly pushed shin bone liner false body into the shin bone holds in the palm false body, accomplishes the implantation of shin bone liner false body, when implanting shin bone liner false body, guarantees the stability of other false bodies of accomplishing the implantation to protection shin bone liner false body avoids beating the damage that causes, simple structure moreover, the simple operation.

To achieve the above objects, the present invention provides a prosthesis implanting device for implanting a tibial insert prosthesis into a human body, comprising:

the bracket comprises a base part, the far end of the base part is connected with a barb matched with a clamping groove on the tibial tray prosthesis, and the near end of the base part is bent and extended to form a fixed handle;

the movable handle is rotatably connected with the bracket; and the number of the first and second groups,

the push rod is used for pushing the tibia liner prosthesis, the push rod is movably arranged on the base part, and the near end of the push rod is movably connected with the movable handle; the movable handle is used for driving the far end of the push rod to be far away from or close to the tibia liner prosthesis.

Optionally, the barb is connected to the distal end of the base.

Optionally, the barb and the stent are of an integrally formed structure.

Optionally, the distal end of the push rod is provided with a push-in portion having a protrusion corresponding to a slot on a lateral side of the tibial spacer prosthesis.

Optionally, the junction of the base and the fixed handle is hinged to the movable handle.

Optionally, one end of the movable handle is hinged to the proximal end of the push rod.

Optionally, the proximal end of the base is provided with a limiting groove, one end of the movable handle penetrates through the limiting groove and is hinged to the proximal end of the push rod, and the limiting groove can limit the movement range of the movable handle.

Optionally, the base is provided with a guide structure for limiting the direction of movement of the push rod.

Optionally, the top of the base is at least partially domed to form the guide formation, the guide formation having a guide aperture therethrough through which the push rod is movably passed.

Optionally, the prosthetic implant device further comprises:

and the elastic piece is respectively connected with the fixed handle and the movable handle and is used for providing elastic force for enabling the fixed handle and the movable handle to be away from each other.

The utility model provides a barb of the usable support distal end of prosthetic implantation device simply just swiftly holds in the palm the shin bone false body and catches on, not only provides the application of force point for implanting the shin bone liner false body, but also can prevent to accomplish the aversion of the false body of implanting, so the configuration, simple structure, easy operation is convenient, promotes operation efficiency to improve knee joint false body's implantation treatment, avoid the shin bone liner false body because of receiving the damage that strikes and cause simultaneously, reduce cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a prosthetic implant device according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a prosthetic implant device according to a preferred embodiment of the present invention in a state not yet engaged with a tibial insert prosthesis and a tibial tray prosthesis;

FIG. 3 is a schematic view of a prosthetic implant device according to a preferred embodiment of the present invention in a mated configuration with a tibial insert prosthesis and a tibial tray prosthesis;

FIG. 4 is a cross-sectional view of the prosthetic implant device shown in FIG. 3 after it has been mated with a tibial insert prosthesis and a tibial tray prosthesis, with the spring omitted;

fig. 5 is a schematic structural view of a push rod according to a preferred embodiment of the present invention;

fig. 6 is a schematic structural view of a stand according to a preferred embodiment of the present invention;

fig. 7 is a structural schematic of a movable handle according to a preferred embodiment of the present invention.

In the figure: 10-a scaffold; 11-a base; 111-barbs; 112-a guide structure; 113-a pilot hole; 114-a limiting groove; 12-a fixed handle; 121-a first pin hole; 20-a movable handle; 21-a second pin hole; 22-a fourth pin hole; 30-a push rod; 31-third pin hole; 32-a push-in portion; 321-a bump; 40-a first fixing pin; 50-a second securing pin; 60-an elastic member; 1-tibial spacer prosthesis; 2-tibial tray prosthesis.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, and are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally employed in a sense including "and/or," the terms "a", "an" and "the" are generally employed in a sense including "at least one", the terms "at least two" and "two or more" are generally employed in a sense including "two or more", and moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit identification of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or at least two of the features, the terms "one end" and "the other end" generally refer to the corresponding two parts, which include not only the end points, but also the terms "mounted", "connected" and "connected" should be understood broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Further, as used in this disclosure, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and should not be understood to indicate or imply a spatial pose relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element, unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used in the present invention, the terms "axial" and "up and down" refer to directions parallel to the axis; the terms "transverse" and "radial" refer to directions perpendicular to the axis. As used in the present invention, the term "proximal" refers to the end distal to the subject; "distal" refers to the end near the subject.

An object of the utility model is to provide a prosthetic implantation device for implant human body with shin bone liner prosthesis, shin bone liner prosthesis generally installs to the shin bone and holds in the palm between prosthesis and the thighbone condyle prosthesis. The prosthesis implanting device completes implantation of the tibia liner prosthesis by using smaller force through the lever principle, and is simple in structure, simpler and more convenient to operate and easy to get into the hand.

The prosthesis implantation device according to the present invention will be further described with reference to the accompanying drawings and examples. The embodiments and features of the embodiments described below can be supplemented or combined with each other without conflict.

Fig. 1 shows the structure of a prosthetic implant device according to a preferred embodiment of the present invention. Specifically, the prosthetic implant device includes a stent 10, a movable handle 20, and a push rod 30. The stand 10 includes a base 11 and a stationary handle 12, both of which are preferably of integrally formed construction. The distal end of the base portion 11 is connected with a barb 111 that engages with a detent on the tibial tray prosthesis 2 (see fig. 2) to hook the tibial tray prosthesis 2, to provide a point of force for gripping the handle, and to prevent the tibial tray prosthesis 2 from shifting. And the proximal end of the base 11 is bent and extended to form a fixed handle 12. The movable handle 20 is rotatably connected with the stand 10 to be rotatable with respect to the stand 10. A push rod 30 is movably disposed at the top of the base 11 and is used to push the tibial insert prosthesis 1 to implant the tibial insert prosthesis 1 between the tibial tray prosthesis 2 and the femoral condyle prosthesis. Wherein the proximal end of the push rod 30 is movably connected with the movable handle 20, and the distal end is used for abutting against the tibial gasket prosthesis 1.

Referring to fig. 2 to 4, the above prosthetic implant device is used according to the principle: firstly, as shown in fig. 2, the tibial gasket prosthesis 1 is roughly placed on the tibial tray prosthesis 2, and then the tibial gasket prosthesis 1 is implanted between the tibial tray prosthesis 2 and the femoral condyle prosthesis by using the prosthesis implanting device; as shown in fig. 3 and 4, during the process of implanting the tibial gasket prosthesis 1, the barb 111 is initially hooked on the slot on the tibial tray prosthesis 2, and the distal end of the push rod 30 is pressed against the lateral surface of the tibial gasket prosthesis 1; then the movable handle 20 is pressed, the movable handle 20 can rotate around the rotation axis, the pushing force is transmitted to the push rod 30, the tibial gasket prosthesis 1 is pushed, and the movable handle 20 is released after the tibial gasket prosthesis 1 is installed in place. It should be understood that the above axis of rotation is perpendicular to the plane formed by movable handle 20 and stationary handle 12.

So dispose, the barb 111 of utilizing the support 10 distal end simply and swiftly catches on the shin bone and holds in the palm the false body, so that can ensure the stability of the thighbone condyle false body and the shin bone that the implantation has been accomplished in the implantation process, thereby not only provide the point of application of force for implanting shin bone liner false body 1, and can prevent the aversion of having implanted the false body, improve the implantation treatment of knee joint false body, and simple structure simultaneously, convenient operation, it is swift, effectively promote surgical efficiency, can also protect shin bone liner false body to avoid knocking the damage that causes simultaneously, and the cost is reduced. It needs to understand, barb 111 of this application can with the shin bone holds in the palm prosthesis 2 buckle locking, and need not to cooperate other structures to lock and attach, therefore the structure is simpler, and the operation is also more convenient.

It should be further understood that the connection position of the movable handle 30 and the bracket 10 is not limited to the intersection of the base 11 and the fixed handle 12, and the connection position may be the fixed handle 12 or the base 11. The barb 111 and the base 11 may be fixedly or movably connected.

In one example, the intersection of the base 11 and the fixed handle 12 is hinged to the movable handle 20. As shown in fig. 6, a first pin hole 121 is provided at the intersection of the base 11 and the fixed handle 12. As shown in fig. 7, the movable handle 20 is provided with a second pin hole 21. The first pin hole 121 and the second pin hole 21 mount the first fixing pin 40, thereby providing a rotation axis for the rotation of the movable handle 20.

In one example, one end of movable handle 20 is hinged to the proximal end of push rod 30. As shown in fig. 5, the proximal end of the push rod 30 is provided with a third pin hole 31. As shown in fig. 7, one end of the movable handle 20 is provided with a fourth pin hole 22. The third pin hole 31 and the fourth pin hole 22 are installed with a second fixing pin 50 (see fig. 1) to provide a transmission path for force transmission between the movable handle 20 and the push rod 30. Wherein the fourth pin hole 22 is configured to provide a moving space for the second fixing pin 50 and limit a moving range thereof. Optionally, the fourth pin hole 22 is a kidney-shaped hole, where the long axis of the fourth pin hole 22 is along the axis of the movable handle 20. Of course, in other embodiments, the fourth pin hole 22 may be other non-circular holes, such as a rectangular hole, an oval hole, etc., and the length direction thereof is along the axis of the movable handle 20.

In another example, one end of the movable handle 20 can be connected to the proximal end of the push rod 30 via a slot structure, such as a T-slot structure, so that the push rod 30 can only move along its length for the purpose of pushing in the tibial insert prosthesis. For example, the proximal end of the push rod 30 is provided with a slot structure in which one end of the movable handle 20 is located.

Further, the barbs 111 are preferably fixedly connected to the stent 10, and further, the barbs 111 are preferably integrally formed with the stent 10 for simpler structure. In this application embodiment, the upper surface of the tibia support prosthesis 2 close to the tibia pad prosthesis 1 is provided with a groove, and the side wall of the groove is provided with a clamping groove capable of being clamped with the barb 111.

As shown in fig. 5, in a specific embodiment, the distal end of the push rod 30 is provided with a push-in portion 32, and the size of the push-in portion 32 is larger than that of the other portions. And the pushing-in part 32 is provided with a protrusion 321 corresponding to a slot on the side surface of the tibial gasket prosthesis 1, the protrusion 321 can be inserted into the slot on the side surface of the tibial gasket prosthesis 1 to position the tibial gasket prosthesis 1, and the bottom surface of the protrusion 321 can contact the side surface of the tibial gasket prosthesis 1 to realize abutting. Alternatively, the pushing portion 32 may be detachably connected, preferably threadedly connected, to a proximal rod-shaped body, such as a pushing portion 32 having a proximal end provided with an internally threaded bore and a distal end provided with an external thread. Preferably, the surfaces of the push-in portion 32 that are in abutting contact with the tibial gasket prosthesis 1 are polished, and preferably the push-in portion 32 abuts with the lateral surfaces of the tibial gasket prosthesis 1 through a contoured surface.

Referring to fig. 6, the base 11 is preferably provided with a guide structure 112 for limiting the moving direction of the push rod 30 so that it can only slide along a fixed direction, thereby facilitating the concentrated transmission of force. In one embodiment, as shown in fig. 6, the top of the base 11 is at least partially arched to form a guide structure 112, the guide structure 112 has a guide hole 113 therethrough, the guide hole 113 is a circular hole, and the push rod 30 is movably inserted through the guide hole 113. The number of the guide structures 112 may be one or more. However, in other embodiments, the guiding structure 112 may also be a guiding rod or a guiding rail.

Further, a limit groove 114 is formed at the proximal end of the base 11, and one end of the movable handle 20 passes through the limit groove 114 and is hinged to the proximal end of the push rod 30. The limit groove 114 can limit the range of motion of the movable handle 20. The retaining groove 114 may be a rectangular groove or a kidney-shaped groove.

In addition, as shown in FIGS. 1 to 3, the prosthetic implant device generally further includes an elastic member 60 connected to the fixed handle 12 and the movable handle 20, respectively, and for providing an elastic force for moving the fixed handle 12 and the movable handle 20 away from each other. The elastic member 60 may be a spring plate or a spring to perform a resilient action, which is more convenient.

It should be noted that, for a person skilled in the art, several improvements and additions can be made without departing from the scope of the present invention, and these improvements and additions should also be considered as the protection scope of the present invention. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present invention, which should be construed as broadly as the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims (10)

1. A prosthetic implant device for implanting a tibial insert prosthesis in a human body, comprising:

the bracket comprises a base part, the far end of the base part is connected with a barb matched with a clamping groove on the tibial tray prosthesis, and the near end of the base part is bent and extended to form a fixed handle;

the movable handle is rotatably connected with the bracket; and the number of the first and second groups,

a push rod for pushing the tibia liner prosthesis is movably arranged on the base, and the near end of the push rod is movably connected with the movable handle; the movable handle is used for driving the far end of the push rod to be far away from or close to the tibia gasket prosthesis.

2. The prosthetic implant device of claim 1, wherein the barb is connected to the distal end of the base.

3. The prosthetic implant device of claim 2, wherein the barb is of unitary construction with the stent.

4. The prosthetic implant device of claim 1, wherein a distal end of the push rod is provided with a push-in portion having a protrusion corresponding to a slot on a lateral side of the tibial insert prosthesis.

5. The prosthetic implant device of claim 1, wherein an intersection of the base and the fixed handle is hinged to the movable handle.

6. The prosthetic implant device of claim 1, wherein one end of the movable handle is hingedly connected to the proximal end of the push rod.

7. The prosthetic implant device of claim 6, wherein the proximal end of the base portion defines a retaining slot, one end of the movable handle extends through the retaining slot and is hingedly coupled to the proximal end of the push rod, and the retaining slot limits the range of motion of the movable handle.

8. The prosthetic implant device of claim 1, wherein a top portion of the base portion is provided with a guide structure for limiting a direction of movement of the push rod.

9. The prosthetic implant device of claim 8, wherein the top portion of the base portion is at least partially arched to form the guide structure, the guide structure having a guide hole therethrough, the push rod being movable through the guide hole.

10. The prosthetic implant device of claim 1, further comprising:

and the elastic piece is respectively connected with the fixed handle and the movable handle and is used for providing elastic force for enabling the fixed handle and the movable handle to be away from each other.

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