CN220495107U - Closed guiding type femur handle - Google Patents

Abstract

The utility model discloses a closed guide type femoral stem, which comprises a femoral head, wherein one end of the femoral head is provided with a thread groove, a threaded rod with matched size is arranged in the thread groove in a matched mode, one end of the threaded rod is connected with a connecting bone, and one end of the connecting bone is provided with a first femoral stem through an adjusting mechanism; in this closed direction formula femoral stem, at first according to patient's body structure's difference measurement femoral stem's length, put into the recess that second femoral stem surface was seted up respectively with connecting rod and fixed plate that first femoral stem one end was connected, rotate second femoral stem again, the draw-in groove the inside of seting up of recess is rotated the fixture block that fixed plate one end was connected, under mutually supporting use between draw-in groove and fixture block, can install first femoral stem and second femoral stem firm, thereby reduce the time of femoral stem refaction, it is better with patient's self fusion degree according to skeleton measuring length simultaneously, the closure is good, reduce uncomfortable sense.

Description

Closed guiding type femur handle

Technical Field

The utility model relates to the related technical field of femoral stems, in particular to a closed guide type femoral stem.

Background

The femoral stem is a surgical implant for replacing the femoral component of a human hip joint, and is used in combination with a ball head and an acetabular cup for hip joint semi-hip replacement surgery, but the existing femoral stem has some defects, such as.

Authorized bulletin number: CN214104758U, authorized public number day: 2021.09.03, a closed guide type femoral stem comprises a bone stem body, wherein the bone stem body is divided into a proximal stem and a distal stem, the distal stem is fixedly arranged on the proximal stem, an elastic support piece is fixedly arranged at one end of the distal stem far away from the proximal stem, the elastic support piece is circumferentially arranged along the outer side surface of the distal stem, and when the distal stem is worn in a medullary cavity, the elastic support piece is abutted against the inner side wall of the medullary cavity. The application has the effects that when the elastic support piece is abutted against the inner wall of the marrow cavity, the patient is not easy to feel severe pain, the phenomenon that the fixation fails to penetrate through the side wall of the bone is not easy to occur,

however, the above-mentioned prior art scheme has a drawback that the femoral stem needs to be ensured to have proper neck length during the implantation process, and only under such conditions, the installed femoral stem can ensure normal walking and movement of a human body, but because the conventional femoral stem is integral and has poor closeness due to the difference between the physique and the bone of a patient, if the length of the femoral stem needs to be adjusted, the cost is increased, so we propose a closed guiding femoral stem so as to solve the problems set forth in the above.

Disclosure of Invention

The utility model aims to provide a closed guide type femoral stem, which is characterized in that firstly, the length of the femoral stem is measured according to different body structures of a patient, a connecting rod and a fixing plate connected with one end of a first femoral stem are respectively placed into a groove formed in the surface of a second femoral stem, then the second femoral stem is rotated, a clamping block connected with one end of the fixing plate is rotated into a clamping groove formed in the groove, and under the mutual matching use of the clamping groove and the clamping block, the first femoral stem and the second femoral stem can be firmly installed, so that the remanufacturing time of the femoral stem is shortened, and meanwhile, the fusion degree of the bone measured length and the patient is better, the closure is good, and the discomfort is reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a closed direction formula femoral stem, includes the femoral head, the thread groove has been seted up to femoral head one end, size assorted threaded rod is installed to thread groove internally mounted, threaded rod one end is connected with the connecting bone, first femoral stem is installed through adjustment mechanism to connecting bone one end, first femoral stem one end is connected with the second femoral stem through installation mechanism, second femoral stem one end welding has the supporting bone.

Preferably, the thread groove and the threaded rod form a threaded connection.

Preferably, the adjusting mechanism comprises a supporting plate, a rotating rod and a fixing plate, wherein the supporting plate is arranged on the inner wall of the first femoral stem, the rotating plate is arranged inside the first femoral stem, the rotating rod penetrates through the supporting plate and the rotating plate respectively, and one end of the rotating rod is connected with the fixing plate.

Preferably, the outer walls of the supporting plate and the rotating plate are arranged in a zigzag manner respectively, and the supporting plate and the rotating plate are mutually staggered and connected.

Preferably, the mounting mechanism comprises a groove, a clamping groove, a connecting rod, a fixing plate and a clamping block, wherein the groove is formed in the surface of the first femoral stem, the clamping groove is formed in the inner wall of the groove, the connecting rod is arranged at one end of the second femoral stem, and one end of the connecting rod is connected with the clamping block through the fixing plate.

Preferably, the clamping groove and the clamping block are symmetrically arranged on the central axis of the groove and the central axis of the fixing plate respectively, and the inner shape of the clamping groove is matched with the outer shape of the clamping block.

Preferably, the supporting bone is made of soft rubber.

Compared with the prior art, the utility model has the beneficial effects that:

1. this closed direction formula femoral stem, through the setting of installation mechanism, at first according to the different measurement femoral stem's of patient's health structure length, put into the recess that second femoral stem surface was seted up respectively with connecting rod and fixed plate that first femoral stem one end was connected, the second femoral stem of rethread, the draw-in groove inside of seting up is rotated to the draw-in groove that the recess was inside with the fixture block that fixed plate one end was connected, under mutually supporting use between draw-in groove and the fixture block, can install first femoral stem and second femoral stem firm, thereby reduce the time that the femoral stem was prefabricated again, simultaneously according to the length of skeleton measurement and patient's self degree of fusion better, the closure is good, reduce uncomfortable sense, the supporting bone is soft rubber material setting simultaneously, can reduce the pain sense that femoral stem and self bone friction produced, also do not have adverse reaction to self bone.

Drawings

FIG. 1 is a schematic side view of the present utility model;

FIG. 2 is a schematic view of the structure of the femoral head and connecting bone of the present utility model;

FIG. 3 is a schematic view of the structure of the adjusting mechanism of the present utility model;

FIG. 4 is a schematic view of the first and second femoral stems of the present utility model;

FIG. 5 is a schematic view of the mounting mechanism of the present utility model.

In the figure: 1. femoral head; 2. a thread groove; 3. a threaded rod; 4. connecting bones; 5. an adjusting mechanism; 501. a support plate; 502. a rotating plate; 503. a rotating rod; 504. a fixing plate; 6. a first femoral stem; 7. a mounting mechanism; 701. a groove; 702. a clamping groove; 703. a connecting rod; 704. a fixed block; 705. a clamping block; 8. a second femoral stem; 9. supporting the bone.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the present utility model provides a technical solution: a closed guiding femoral stem comprises a femoral head 1, wherein one end of the femoral head 1 is provided with a thread groove 2, a threaded rod 3 with matched size is arranged in the thread groove 2 in a matched mode, one end of the threaded rod 3 is connected with a connecting bone 4, the thread groove 2 and the threaded rod 3 form threaded connection, and under the condition that the thread groove 2 and the threaded rod 3 are matched with each other for use, the femoral head 1 and the connecting bone 4 can be firmly connected, so that subsequent transplanting is facilitated;

the first femoral stem 6 is arranged at one end of the connecting bone 4 through the adjusting mechanism 5, the adjusting mechanism 5 comprises a supporting plate 501, a rotating plate 502, a rotating rod 503 and a fixed plate 504, the supporting plate 501 is arranged on the inner wall of the first femoral stem 6, the rotating plate 502 is arranged in the first femoral stem 6, the rotating rod 503 penetrates through the supporting plate 501 and the rotating plate 502 respectively, one end of the rotating rod 503 is connected with the fixed plate 504, the femoral stem is generally required to be placed in the direction of a forward tilting angle of 10-25 degrees, therefore, the fixed plate 504 is flattened, a gap exists between the supporting plate 501 and the rotating plate 502, the rotating plate 502 is rotated, the connecting bone 4 is driven to rotate, the angle between the connecting bone 4 and the first femoral stem 6 is adjusted, after the angle is adjusted, the fixed plate 504 is straightened, no gap exists between the supporting plate 501 and the rotating plate 502 is fixed through a zigzag connection mode, the outer walls of the supporting plate 501 and the rotating plate 502 are distributed in a zigzag mode, and the supporting plate 501 and the rotating plate 502 are mutually staggered;

the first femur handle 6 one end is connected with the second femur handle 8 through the installation mechanism 7, the installation mechanism 7 includes recess 701, draw-in groove 702, connecting rod 703, fixed plate 504 and fixture block 705, the recess 701 is seted up on first femur handle 6 surface, draw-in groove 702 has been seted up to recess 701 inner wall, connecting rod 703 sets up in second femur handle 8 one end, connecting rod 703 one end is connected with fixture block 705 through fixed plate 504, at first according to the different length of measuring the femur handle of patient's health structure, put into the recess 701 inside of second femur handle 8 surface respectively with connecting rod 703 and fixed plate 504 that first femur handle 6 one end is connected, rotate second femur handle 8 again, the draw-in groove 702 inside of seting up the recess 701 with fixture block 705 that fixed plate 504 one end is connected, under the use of mutually supporting between draw-in groove 702 and fixture block, can install first femur handle 6 and second femur handle 8 firm, thereby reduce the time of femur handle remanufacturing, simultaneously according to the length and patient's own degree of fusion of skeleton measurement better, the closure is good, reduce uncomfortable sense, draw-in groove 702 and fixture block 705 are respectively with recess 701 and fixed plate 504, the fixture block is the inside of recess 701 and fixture block 504 is the inside, and the difficult shape is also welded with the inside of bone 9, the difficult joint of bone is set up to the bone handle, the poor-shaped, the joint is difficult bone shape is formed with the second femur handle 9, and is self-supporting the bone is welded to the bone handle.

Working principle: for this kind of closed direction formula femoral stem, firstly, according to the different measurement femoral stem's of patient's health structure length, put into the recess 701 inside of second femoral stem 8 surface opening respectively with connecting rod 703 and fixed plate 504 that first femoral stem 6 one end is connected, rotate second femoral stem 8 again, the fixture block 705 that is connected with fixed plate 504 one end rotates the draw-in groove 702 inside of seting up of recess 701, then under the mutually supporting use between draw-in groove 702 and the fixture block 705, can install first femoral stem 6 and second femoral stem 8 firmly, thereby reduce the time that the femoral stem was prefabricated again, simultaneously according to the length that the skeleton measured and patient's self fusion degree better, the closure nature is good, reduce uncomfortable sense, secondly, the femoral stem generally needs to be laid in the direction of 10 ~ 25 angle of leaning forward, consequently, flat fixed plate 504, make there is the space between backup pad 501 and the rotor plate 502, thereby drive and link bone 4 and first femoral stem 6, after the angle adjustment, it is good to break down fixed plate 504, make between backup pad and the rotor plate 502, make the space between backup pad and the rotor plate, through the connection mode of bone 4 and the first femoral stem 6, the difficult self-supporting mode is carried out, the difficult response is carried out, the difficult course is carried out to the setting up to the bone stem, and the self-facing soft sense is carried out, and the thighbone is difficult to the handle is achieved, and the artificial effect is reduced.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A closed guiding femoral stem comprising a femoral head (1), characterized in that: the femoral head is characterized in that a thread groove (2) is formed in one end of the femoral head (1), a threaded rod (3) with matched size is mounted in the thread groove (2), one end of the threaded rod (3) is connected with a connecting bone (4), one end of the connecting bone (4) is provided with a first femoral stem (6) through an adjusting mechanism (5), one end of the first femoral stem (6) is connected with a second femoral stem (8) through a mounting mechanism (7), and one end of the second femoral stem (8) is welded with a supporting bone (9).

2. A closed guide femoral stem according to claim 1 wherein: the thread groove (2) and the threaded rod (3) form threaded connection.

3. A closed guide femoral stem according to claim 1 wherein: the adjusting mechanism (5) comprises a supporting plate (501), a rotating plate (502), a rotating rod (503) and a fixing plate (504), wherein the supporting plate (501) is arranged on the inner wall of the first femoral stem (6), the rotating plate (502) is arranged inside the first femoral stem (6), the rotating rod (503) penetrates through the supporting plate (501) and the rotating plate (502) respectively, and one end of the rotating rod (503) is connected with the fixing plate (504).

4. A closed guide femoral stem according to claim 3 wherein: the outer walls of the supporting plate (501) and the rotating plate (502) are distributed in a zigzag mode, and the supporting plate (501) and the rotating plate (502) are mutually connected in a staggered mode.

5. A closed guide femoral stem according to claim 1 wherein: the mounting mechanism (7) comprises a groove (701), a clamping groove (702), a connecting rod (703), a fixing plate (504) and a clamping block (705), wherein the groove (701) is formed in the surface of the first femoral stem (6), the clamping groove (702) is formed in the inner wall of the groove (701), the connecting rod (703) is arranged at one end of the second femoral stem (8), and one end of the connecting rod (703) is connected with the clamping block (705) through the fixing plate (504).

6. A closed guide femoral stem according to claim 5 wherein: the clamping groove (702) and the clamping block (705) are respectively and symmetrically arranged on the central axes of the groove (701) and the fixing plate (504), and the inner shape of the clamping groove (702) is matched with the outer shape of the clamping block (705).

7. A closed guide femoral stem according to claim 1 wherein: the supporting ribs (9) are made of soft rubber materials.