CN216136123U

CN216136123U - Device for assisting femoral stem positioning and embedding

Info

Publication number: CN216136123U
Application number: CN202121931082.3U
Authority: CN
Inventors: 李炫�
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-03-29
Anticipated expiration: 2031-08-17

Abstract

The utility model relates to a device for assisting in positioning and embedding a femoral stem, which comprises: a first fixing member; a connecting mechanism; a second stationary component position adjustably connected to the first stationary component by the connection mechanism. When the device for assisting femoral stem positioning embedding is used, the femoral stem is fixed by the second fixing part, and the first fixing part is clamped and fixed on the rack of the clamping tool of the femoral head, so that the positioning reference of the femoral stem is consistent with the reference of the femoral head clamping device, and the angle adjustment is accurate.

Description

Device for assisting femoral stem positioning and embedding

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a device for assisting positioning and embedding of a femoral stem.

Background

The proximal end of the physiological femur has a certain anteversion angle and eversion angle, and when the proximal end of the femur is damaged and needs to be replaced by the hip joint prosthesis, the hip joint prosthesis needs to ensure sufficient mechanical properties under the condition of the physiological anteversion angle and the eversion angle. Standard YY/T0809.4-2018/ISO 7206-4:2010 surgical implant part and Total hip prosthesis part 4: fatigue test and performance requirements for femoral components with handles, YY/T0809.6-2018/ISO 7206-6:2013 part 6 of surgical implants and total hip prostheses: the fatigue performance test and performance requirement of neck of femoral component with handle stipulates that when the fatigue test of femoral handle is carried out, the femoral handle is embedded in a fixed medium by an eversion angle of 10 degrees and an anteversion angle of 9 degrees, and then the mechanical test is carried out.

In the prior art, the adjustment of the eversion angle and the anteversion angle of a femoral stem is adjusted according to a femoral head clamping device, the device clamps the spherical surface of the femoral head in a hip joint prosthesis through an internal spherical surface clamp, the fixation is realized by applying a certain pretightening force, and then the eversion angle and the anteversion angle of the hip joint prosthesis are adjusted through the fixing tool.

In the prior art, because the hip joint prosthesis is fixed through a spherical surface, if the spherical surface diameter of an inner spherical surface clamp is not completely consistent with the outer diameter of the femoral head, the contact form of the two spherical surfaces is point contact, the contact area is extremely small, the clamping force of the hip joint prosthesis is small, the hip joint prosthesis is easy to rotate in a coronal plane and a sagittal plane in the state, the adjustment of a 10-degree valgus angle and a 9-degree anteversion angle of the hip joint prosthesis is difficult in the state, and the femoral head is easy to be clamped unstably because the clamping head needs to be slightly rotated during the adjustment of the valgus angle and the anteversion angle, so that the angle adjustment is inaccurate. Meanwhile, due to spherical clamping, the hip joint prosthesis has a natural downward movement trend, and if the femoral head clamping device base is not horizontal, the datum line for adjusting the eversion angle and the anteversion angle of the hip joint prosthesis is inconsistent with the natural vertical line of the hip joint prosthesis, so that the datum line is not uniform, and the angle adjustment is also inaccurate.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the problems of the existing femoral head clamping, a device for assisting the femoral stem to be positioned and embedded is needed.

A device for assisting in locating embedding of a femoral stem, comprising: a first fixing member; a connecting mechanism; a second stationary component position adjustably connected to the first stationary component by the connection mechanism.

When the device for assisting femoral stem positioning embedding is used, the femoral stem is fixed by the second fixing part, and the first fixing part is clamped and fixed on the rack of the clamping tool of the femoral head, so that the positioning reference of the femoral stem is consistent with the reference of the femoral head clamping device, and the angle adjustment is accurate.

In one embodiment, the device for assisting in positioning and embedding of the femoral stem further comprises a first locking structure, the connecting mechanism and the first fixing component are relatively rotatably connected through the first locking structure, and the first locking structure can lock the relative angle of the first fixing component and the connecting mechanism.

In one embodiment, the connecting mechanism comprises a first portion connected to the first fixing member, a second portion connected to the second fixing member, the first portion and the second portion being rotatably and/or slidably connected with each other, and a second locking structure capable of locking the relative positions of the first portion and the second portion.

In one embodiment, the second locking structure comprises a locking bolt and a locking nut, the locking bolt passes through the first part and the second part, and the locking bolt is matched with the locking nut and locks the first part and the second part.

In one embodiment, the first portion is provided with a sliding groove, the locking bolt passes through the sliding groove, and the second portion can drive the second locking structure to slide in the sliding groove relatively.

In one embodiment, the first fixing part comprises a first clamping body and a first clamping bolt, the first clamping body comprises a top plate and a bottom plate which are arranged at intervals, the first clamping bolt is in threaded fit with the bottom plate, and one end of the first clamping bolt can extend into the space between the top plate and the bottom plate; the connecting mechanism is connected to the first clamping body.

In one embodiment, the second fixing element is arranged to be positionally adjustable in the connecting device.

In one embodiment, the connecting mechanism is provided with an elongated slot, the second fixing component includes an adjusting nut, a sliding part, a limiting part connected with the sliding part, and a fixing mechanism connected with the sliding part, the sliding part is inserted into the elongated slot, the sliding part is in threaded fit with the adjusting nut, the adjusting nut and the limiting part are located on two sides of the elongated slot, and the adjusting nut and the limiting part are in fit and lock the sliding part and the connecting mechanism.

In one embodiment, the fixing mechanism comprises a second clamping body, the second clamping body comprises two fixing plates arranged at intervals, at least one of the two fixing plates is provided with a second clamping bolt, the second clamping bolt is in threaded fit with the fixing plates, and the second clamping bolt is provided with an abutting surface capable of extending into a space between the two fixing plates.

In one embodiment, the second clamping bolt is disposed on each of the two fixing plates, and one end of the sliding member extends between the two fixing plates.

In one embodiment, the abutting surface is a plane or an aspheric curved surface.

In one embodiment, the second clamping bolt is made of a polymer material.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a device for assisting femoral stem positioning and embedding according to an embodiment of the present invention.

Fig. 2 is a front view of the device of fig. 1 for assisting in positioning and embedding of a femoral stem.

Fig. 3 is a top view of the device of fig. 1 for assisting in positioning and embedding of a femoral stem.

Fig. 4 is a side view of the device of fig. 1 for assisting in positioning and embedding of a femoral stem.

Fig. 5 is a schematic structural view of the femoral stem clamping device for assisting the femoral stem positioning and embedding according to an embodiment of the present invention.

The relevant elements in the figures are numbered correspondingly as follows:

100. a device for assisting the femoral stem positioning and embedding; 10. a first fixing member; 110. a first clamping body; 111. a top plate; 112. a base plate; 113. a side plate; 120. a first clamping bolt; 130. a connecting portion; 20. a connecting mechanism; 210. a first portion; 211. a chute; 220. a second portion; 221. a long groove; 230. a second locking structure; 231. locking the bolt; 232. locking the nut; 30. a second fixing member; 310. adjusting the nut; 320. a slider; 330. a limiting part; 340. a second clamping body; 341. a fixing plate; 342. a second clamping bolt; 3421. an abutting surface; 343. connecting plates; 40. a first locking structure; 410. fixing the bolt; 420. fixing a nut; 200. a femoral stem.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, there is illustrated a structure of a device 100 for assisting femoral stem positioning embedding according to an embodiment of the present invention, in which the device 100 for assisting femoral stem positioning embedding is used to fix a femoral stem 200 (shown in fig. 5) during a hip prosthesis test, thereby allowing a medical staff to easily adjust an eversion angle and an anteversion angle of the hip prosthesis. The following detailed description is made with reference to the accompanying drawings.

As shown in fig. 1, the device 100 for assisting femoral stem positioning embedding according to an embodiment of the present invention includes a first fixing member 10, a connecting mechanism 20, and a second fixing member 30, wherein the second fixing member 30 is connected to the first fixing member 10 via the connecting mechanism 20 in a position-adjustable manner.

The specific structure of the first fixing member 10 is not limited, and may be a frame that can be fixed to a clamping tool for a femoral head. Likewise, the specific configuration of the second fixing member 30 is not limited, and it is sufficient that the femoral stem 200 can be fixed. The connecting mechanism 20 includes, but is not limited to, a rod, a plate, and may be regular or irregular in shape.

As shown in fig. 1, the first fixing member 10, which is specifically fixed to a frame of a clamping tool of a femoral head by clamping, includes a first clamping mechanism, which includes a first clamping body 110, a first clamping bolt 120, and a connecting portion 130. The first clamping body 110 includes a top plate 111 and a bottom plate 112 disposed at an interval, and a side plate 113 connecting the top plate 111 and the bottom plate 112. The connecting portion 130 is disposed on a side of the top plate 111 opposite to the bottom plate 112 for connecting with the connecting mechanism 20. The first clamping bolt 120 is screw-engaged with the base plate 112, and one end of the first clamping bolt 120 can protrude between the top plate 111 and the base plate 112. When the first fixing member 10 is fixed to the frame of the clamping fixture for the femoral head, the corresponding mating portion of the frame may be placed between the top plate 111 and the bottom plate 112, and then the first clamping bolt 120 is tightened, so that the corresponding mating portion of the frame may be locked between the top plate 111 and the bottom plate 112 of the first clamping body 110.

In this embodiment, the connection mechanism 20 is configured to be adjustable to change the relative position of the first and second fixing

parts

10 and 30, including changing the angle and/or distance between the first and second fixing

parts

10 and 30. In this way, the relative positions of the first fixing part 10 and the second fixing part 30 can be adjusted as required, so that the femoral stem fixing device can be suitable for femoral stems of different models and specifications.

As shown in fig. 1, the connecting mechanism 20 includes a first portion 210, a second portion 220, and a second locking structure 230, wherein the first portion 210 and the second portion 220 are each substantially plate-shaped. The first portion 210 is connected to the connecting portion 130 of the first fixing member 10 through the first locking structure 40. The connecting mechanism 20 and the first fixing member 10 are relatively rotatably connected by a first locking structure 40, and the first locking structure 40 can lock the relative angle of the first fixing member 10 and the connecting mechanism 20. The first portion 210 and the second portion 220 of the connecting mechanism 20 are relatively rotatably and relatively slidably connected by a second locking structure 230, wherein the second locking structure 230 is capable of locking the relative positions of the first portion 210 and the second portion 220.

As shown in fig. 1, in the present embodiment, the first locking structure 40 includes a fixing bolt 410 and a fixing nut 420, and the fixing bolt 410 passes through the first portion 210 and the connecting portion 130 and cooperates with the fixing nut 420, thereby locking the first portion 210 with the first clamping body 110. In other embodiments, the first locking structure 40 may be only used to connect the first portion 210 to the first clamping body 110, but cannot accommodate the relative angle adjustment between the first portion 210 and the first clamping body 110.

As shown in fig. 1 and 2, the first portion 210 of the connecting mechanism 20 is provided with a sliding slot 211, and the second portion 220 can drive the second locking structure 230 to slide relatively in the sliding slot 211 to move away from or close to the first fixing member 10. The second locking structure 230 includes a locking bolt 231 and a locking nut 232, the locking bolt 231 passes through the sliding slot 211 on the first part 210 and passes through the second part 220, and the locking bolt 231 cooperates with the locking nut 232 and locks the first part 210 with the second part 220. The first portion 210 and the second portion 220 are slidable relative to each other, so that the length of the connecting mechanism 20 can be adjusted, and thus the relative positions of the first fixing member 10 and the second fixing member 30 can be changed, and further, the relative angle between the first portion 210 and the second portion 220 can be adjusted, and the relative positions of the first fixing member 10 and the second fixing member 30 can also be adjusted.

In the above embodiment, the connection mechanism 20 and the first fixing member 10 are relatively rotatably connected by the first locking structure 40, and the first portion 210 and the second portion 220 are relatively rotatably connected by the second locking structure 230. In this way, the whole device 100 for assisting in positioning and embedding the femoral stem has two angle adjustment structures, and the relative positions of the first fixing component 10 and the second fixing component 30 can be adjusted.

In other embodiments, the first portion 210 and the second portion 220 are configured such that only angular adjustment is possible via the second locking structure 230. For example, the first part 210 is not provided with the sliding groove 211 but is provided with a through hole, the locking bolt 231 passes through the through hole of the first part 210 and the second part 220 and then is matched with the locking nut 232, and the diameter of the bolt part of the locking bolt 231 is matched with that of the through hole, so that the first part 210 and the second part 220 can realize angle adjustment, but cannot slide relatively, and cannot change the length of the connecting mechanism 20.

In other embodiments, the first portion 210 and the second portion 220 can be configured to slide relative to each other only, and the locking can be achieved by the second locking structure 230 to change the length of the connection mechanism 20. For example, one of the first part 210 and the second part 220 is provided with a guide groove, the other is provided with a slider engaged with the guide groove, a locking bolt 231 is provided at the slider, and the locking bolt 231 is passed through the guide groove to be engaged with a locking nut 232 and lock the first part 210 with the second part 220.

It should be noted that, in the above embodiment, the connecting mechanism 20 has a two-stage structure, but the connecting mechanism 20 may have a one-stage or multi-stage structure. When the connecting mechanism 20 is a multi-section structure, two adjacent sections can rotate and/or slide relatively.

As shown in fig. 1, the second fixing member 30 is adjustably provided to the connecting mechanism 20 to be able to approach or separate from the first fixing member 10, thereby achieving adjustment of the relative positions of the first fixing member 10 and the second fixing member 30.

Wherein the second portion 220 of the connecting mechanism 20 is provided with an elongated slot 221. The second fixing member 30 includes an adjusting nut 310, a sliding member 320, a limiting portion 330 connected to the sliding member 320, and a second clamping mechanism connected to the sliding member 320, the sliding member 320 is disposed through the elongated slot 221, the sliding member 320 is in threaded engagement with the adjusting nut 310, the adjusting nut 310 and the limiting portion 330 are disposed on two sides of the elongated slot 221, and the adjusting nut 310 is engaged with the limiting portion 330 and locks the sliding member 320 and the connecting mechanism 20. When it is desired to adjust the position of the clamping mechanism on the coupling mechanism 20, the adjustment nut 310 is loosened, the slider 320 is moved into position, and the adjustment nut 310 is then retightened.

In other embodiments, one of the connecting mechanism 20 and the second fixing member 30 is provided with a guide slot, and the other is provided with a slide block matched with the guide slot, and the slide block is provided with a bolt which passes through the guide slot and is matched with a nut to connect the connecting mechanism 20 and the second fixing member 30. By the above means, it is also achieved that the second fixing element 30 is arranged in a position-adjustable manner on the connecting means 20.

Referring to fig. 1, 4 and 5, in an embodiment, the second clamping mechanism includes a second clamping body 340, the second clamping body 340 includes two fixing plates 341 disposed at intervals and a connecting plate 343 connected to the two fixing plates 341, a second clamping bolt 342 is disposed on each fixing plate 341, and the second clamping bolt 342 is in threaded engagement with the corresponding fixing plate 341. The second clamping bolt 342 has an abutment surface 3421 that can be inserted between the fixing plates 341. The abutment surface 3421 is embodied as a flat surface for gripping a flat feature on the shoulder of the femoral stem 200. Compared with the prior art, in the embodiment, the femoral stem 200 is fixed in an aspheric surface matching mode, so that infirm spherical surface clamping is avoided, and the accuracy of angle adjustment is guaranteed. The contact surface 3421 may have other shapes, such as an aspheric curved surface, on the premise of achieving the aspheric fit.

Further, one end of the sliding member 320 passes through the connecting plate 343 and extends between the two fixing plates 341, so that the sliding member 320 and the two second clamping bolts 342 can form a three-point positioning for the femoral stem 200, and the clamping effect is better.

Preferably, the second clamping bolts 342 are made of a polymer material, and the two second clamping bolts 342 do not scratch the femoral stem when clamping the femoral stem. Polymeric materials include, but are not limited to, POM (Polyoxymethylene), ABS (Acrylonitrile Butadiene Styrene plastic), PEEK (PEEK materials), ultra high molecular weight polyethylene materials.

In the present embodiment, the material of the portion of the device other than the second clamping bolt 342, which is not in direct contact with the femoral stem, includes, but is not limited to, POM, ABS, PEEK, stainless steel, aluminum alloy, etc.

In other embodiments, only one of the two fixing plates 341 may be provided with a second clamping bolt 342, and the second clamping bolt 342 may be engaged with the other fixing plate 341 and clamp the femoral stem shoulder.

In other embodiments, the second clamping mechanism may be other types of securing mechanisms. For example, the second clamping mechanism may be a screw that engages a matching threaded hole in the femoral stem to secure the femoral stem.

The method of using the device 100 for assisting in positioning and embedding of femoral stem according to the present embodiment will be described in detail with reference to fig. 1 and 5.

When the hip joint prosthesis is positioned and embedded, the length of the connecting mechanism 20 is firstly adjusted to be capable of clamping and fixing the first fixing part 10 on a frame of a clamping tool of the femoral head; meanwhile, the two second clamping bolts 342 of the second clamping mechanism can be used for clamping the plane features on the shoulder of the femoral stem 200, and the second clamping bolts 342 are made of ultra-high molecular weight polyethylene materials, so that the femoral stem cannot be scratched when being matched with the femoral stem 200. At this time, the distance between the planar feature (femoral stem shoulder clamping position) on the shoulder of the femoral stem 200 and the femoral head is fixed, the relative positions of the first part 210 and the second part 220 of the connecting mechanism 20 are adjusted through the locking bolt 231 and the locking nut 232, and after the relative positions of the first part 210 and the second part 220 are adjusted to the proper position, the knob locking nut 232 can be fixed, so that the femoral stem 200 is firmly fixed. It should be noted that the shoulder clamping position and the femoral head position of the femoral stem 200 cannot be adjusted if the first portion 210 and the second portion 220 are adjusted to the extreme relative positions, that is: the first fixing part 10 cannot be clamped and fixed on the frame of the clamping tool of the femoral head, and the femoral stem 200 is fixed by the second clamping mechanism; the position of the femoral stem sliding member 320 in the long groove 221 is adjusted by the adjusting nut 310; the fixing bolt 410 and the fixing nut 420 can be adjusted at the same time, so that the clamping position of the shoulder of the femoral stem and the position of the femoral head are adjusted to be proper positions, and the femoral stem 200 is firmly fixed after the adjusting nut 310 and the fixing nut 420 are screwed.

The device 100 for assisting femoral stem positioning embedding in the embodiment clamps and fixes the first fixing part 10 on the frame of the clamping tool for the femoral stem positioning reference and the femoral head clamping device reference are consistent, and the angle adjustment is facilitated to be accurate. The connecting mechanism 20 has the function of adjusting the length and the angle, so that the femoral stem 200 can be conveniently fixed, and the femoral stem can adapt to femoral stems of different models and specifications. The second clamping mechanism can be matched with the characteristics of the shoulder part of the femoral stem to clamp the femoral stem, so that the hip joint prosthesis is fixed by clamping the shoulder part of the femoral stem, and meanwhile, the second fixing part 30 is matched with the femoral stem in an aspheric surface mode, so that the femoral stem can be firmly fixed, and the angle adjustment is more accurate.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A device for assisting femoral stem positioning embedding is characterized by comprising:

a first fixing member;

a connecting mechanism;

a second stationary component position adjustably connected to the first stationary component by the connection mechanism.

2. The apparatus for assisting femoral stem location embedding of claim 1, further comprising a first locking structure, wherein the connecting mechanism and the first fixing component are relatively rotatably connected through the first locking structure, and the first locking structure can lock a relative angle of the first fixing component and the connecting mechanism.

3. The device for assisting in femoral stem positioning embedding of claim 1, wherein the connecting mechanism comprises a first portion, a second portion and a second locking structure, the first portion is connected with the first fixing component, the second portion is connected with the second fixing component, the first portion and the second portion are relatively rotatably connected and/or relatively slidably connected, and the second locking structure can lock the relative positions of the first portion and the second portion.

4. The device for assisting in femoral stem positioning embedding of claim 3, wherein the second locking structure comprises a locking bolt and a locking nut, the locking bolt passing through the first portion and the second portion, the locking bolt engaging the locking nut and locking the first portion to the second portion.

5. The device for assisting in positioning and embedding of the femoral stem according to claim 4, wherein the first portion is provided with a sliding slot, the locking bolt passes through the sliding slot, and the second portion drives the second locking structure to slide relatively in the sliding slot.

6. The device for assisting in positioning and embedding of the femoral stem according to claim 1, wherein the first fixing member comprises a first clamping body and a first clamping bolt, the first clamping body comprises a top plate and a bottom plate which are arranged at intervals, the first clamping bolt is in threaded fit with the bottom plate, and one end of the first clamping bolt can extend into the space between the top plate and the bottom plate; the connecting mechanism is connected to the first clamping body.

7. The device for assisting in positioning and embedding of a femoral stem according to claim 1, wherein the second fixing member is adjustably positioned at the connection mechanism.

8. The device for assisting in positioning and embedding of the femoral stem according to claim 7, wherein the connecting mechanism is provided with an elongated slot, the second fixing member comprises an adjusting nut, a sliding member, a limiting portion connected to the sliding member, and a fixing mechanism connected to the sliding member, the sliding member is inserted into the elongated slot, the sliding member is in threaded engagement with the adjusting nut, the adjusting nut and the limiting portion are located on two sides of the elongated slot, and the adjusting nut and the limiting portion are engaged and lock the sliding member and the connecting mechanism.

9. The device for assisting in positioning and embedding of femoral stem according to claim 8, wherein the fixing mechanism comprises a second clamping body, the second clamping body comprises two fixing plates arranged at intervals, at least one of the two fixing plates is provided with a second clamping bolt, the second clamping bolt is in threaded fit with the fixing plates, and the second clamping bolt has an abutting surface capable of extending between the two fixing plates.

10. The apparatus as claimed in claim 9, wherein the second clamping bolt is disposed on each of the fixing plates, and one end of the sliding member extends between the fixing plates.

11. The device for assisting femoral stem positioning embedding according to claim 9, wherein the abutting surface is a curved surface which is a plane surface or an aspheric surface.

12. The device for assisting in positioning and embedding of a femoral stem according to claim 9, wherein the second clamping bolt is made of a polymer material.