A highly adaptable sleeve prosthesis that is convenient for adjustment

Abstract

The present invention relates to the technical field of prostheses, and particularly to a highly adaptable sleeve prosthesis that is convenient for adjustment, which solves the problem that the sleeve prosthesis in the prior art is not only inconvenient to adjust but also can only be used for specific sizes, thereby greatly reducing the adaptability of the sleeve prosthesis. A highly adaptable sleeve prosthesis that is convenient for adjustment includes a main body. An inner cavity is formed inside the main body, and a set of vertical grooves are provided on both sides of the outer wall of the main body, and each set of vertical grooves has two. One side of each vertical groove is provided with an adjustment block, and helical teeth are fixedly connected to one side of the four adjustment blocks. Main outer casings are provided on both sides of the main body. In the present invention, the adjustment of the diameter and wingspan can be realized to adapt to different degrees of bone defects, so that the sleeve fits well with the patient's bone quality. Moreover, the provided high-porosity coating can achieve the rapid ingrowth of bone, realize the stability of the prosthesis after surgery, and extend the service life of the prosthesis.

Description

Technical Field

[0001] The present invention relates to the technical field of prostheses, and particularly to a highly adaptable sleeve prosthesis that is convenient for adjustment. Background Art

[0002] A prosthesis is called a prosthetic appliance in medicine and is a medical device that replaces a limb, organ, or tissue of the human body. With the popularization of total hip replacement surgery, the number of revision surgeries is increasing. In revision surgeries, the situation of bone defect on the femoral side of the patient may be encountered, and the defect site needs to be filled to cooperate with the femoral stem prosthesis to achieve stability on the femoral side.

[0003] Currently, the commonly used one for filling bone defects on the femoral side is a sleeve prosthesis, which is used in cooperation with a femoral stem. Since the sleeve needs to be configured in multiple models to fill bone defects of different degrees, including different diameters, wingspans, and heights, the traditional sleeve prosthesis is not only inconvenient to adjust but also can only be used with specific sizes, thus greatly reducing the adaptability of the sleeve prosthesis, which is extremely inconvenient. Therefore, there is an urgent need for a highly adaptable sleeve prosthesis that is convenient for adjustment. Summary of the Invention

[0004] The purpose of the present invention is to provide a highly adaptable sleeve prosthesis that is convenient for adjustment, which solves the problem that the sleeve prosthesis in the prior art is not only inconvenient to adjust but also can only be used with specific sizes, thus greatly reducing the adaptability of the sleeve prosthesis.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A highly adaptable sleeve prosthesis that is convenient for adjustment includes a main body. An inner cavity is provided inside the main body, and a set of vertical grooves is provided on both sides of the outer wall of the main body, and each set of vertical grooves has two. One side of each vertical groove is provided with an adjustment block, and helical teeth are fixedly connected to one side of the four adjustment blocks. Main outer shells are provided on both sides of the main body, and external helical teeth are fixedly connected to both outer sides of the two main outer shells, and inner helical grooves are provided on one inner side of the two main outer shells. Auxiliary outer shells are provided on both sides of the main body, and internal helical teeth for cooperating with the two external helical teeth are fixedly connected to both inner sides of the two auxiliary outer shells, and auxiliary inner helical grooves for cooperating with the helical teeth are fixedly connected to one inner side of the two auxiliary outer shells. One side of one of the two auxiliary outer shells is inserted with a main outer wing, and one side of one of the two main outer shells is inserted with a sub-outer wing, and the main outer wing and the sub-outer wing are snap-connected.

[0007] Preferably, a plurality of wedge holes are provided on the side of the main outer wing corresponding to the two auxiliary outer shells and on the side of the sub-outer wing corresponding to the two main outer shells, and a plurality of filling blocks for cooperating with the wedge holes are provided on one side of the main body.

[0008] Preferably, straight grooves are formed on both sides of the main outer wing opposite to the sub-outer wing, and bosses are fixedly connected to both sides of the main outer wing and the sub-outer wing close to the two straight grooves respectively. Cylinders are fixedly connected to the opposite sides of the two bosses, and round holes are formed on the inner walls of the two straight grooves.

[0009] Preferably, the round hole on one side of the main outer wing is engaged with the cylinder on one side of the sub-outer wing, and the cylinder on one side of the main outer wing is engaged with the round hole on one side of the sub-outer wing.

[0010] Preferably, a plurality of plugs are provided on one side of the main outer wing, and a plurality of wedge-shaped holes for cooperating with the plurality of plugs are formed on the bosses on one side of the main outer wing and the bosses on one side of the sub-outer wing.

[0011] Preferably, the inner cavity is tapered, and the sub-inner inclined groove and the inner inclined groove are used in cooperation to form an inclined groove space.

[0012] The present invention has at least the following beneficial effects:

[0013] When the highly adaptable sleeve prosthesis that is easy to adjust in the present invention is used, first, the main housing, the sub-housing and the main body are installed, that is, the outer helical teeth on the main housing are engaged with the inner helical teeth on the sub-housing. Then, by means of the insertion fit between the adjusting block, the inner inclined groove and the sub-inner inclined groove, the main housing and the sub-housing can be installed on the main body. Finally, the main outer wing and the sub-outer wing are installed. When the diameter does not need to be adjusted, all the inner helical teeth and the outer helical teeth are meshed and matched. When the diameter needs to be adjusted, the outer helical teeth can move relative to the inner helical teeth. The design of the helical tooth direction allows the main housing and the sub-housing to expand outwards, that is, the outer helical teeth can move outwards along the inner helical teeth. The adjustable minimum distance is the pitch of one helical tooth, but inward movement is not allowed. The adjusting block is wedge-shaped, wider at the top and narrower at the bottom, and helical teeth are designed on it, with the slope direction upwards, matching the directions of the inner inclined groove and the sub-inner inclined groove, allowing the helical teeth to move downwards along the inner inclined groove and the sub-inner inclined groove, but reverse movement is not allowed. One end of the adjusting block without helical teeth has a slope, which cooperates with the vertical groove of the main body. Similarly, the vertical groove also has a slope, allowing the adjusting block to slide downwards in the vertical groove. The present invention can realize the adjustment of the diameter and the wingspan to adapt to different degrees of bone defects, make the sleeve fit well with the patient's bone quality, and provide a highly porous coating, which can realize the rapid ingrowth of bone, realize the stability of the prosthesis after surgery, and extend the service life of the prosthesis.

[0014] The present invention also has the following beneficial effects:

[0015] When the main outer wing and the auxiliary outer wing do not need to be adjusted, the wedge holes designed on the main outer shell and the auxiliary outer shell have the same pitch as the inner inclined groove and the pitch of the teeth of the auxiliary inner inclined groove. When the diameter expands by one pitch, the wedge holes on the main outer shell and the auxiliary outer shell move by one wedge hole pitch and align with the wedge holes on the main outer wing and the wedge holes on the auxiliary outer wing, and the filling block can be inserted. The filling block has different widths. When the degree of wingspan expansion needs to be adjusted, a filling block with an appropriate width can be selected and inserted into the wedge holes on the main outer shell and the auxiliary outer wing respectively, and the wedge holes on the auxiliary outer shell and the main outer wing. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is the exploded view of the overall structure of the present invention;

[0018] Figure 2 is the structure diagram of the main outer shell of the present invention;

[0019] Figure 3 is the structure diagram of the auxiliary outer shell of the present invention;

[0020] Figure 4 is the structure diagram of the main body of the present invention;

[0021] Figure 5 is the installation diagram of the main outer shell, the auxiliary outer shell and the adjusting block of the present invention;

[0022] Figure 6 is the installation diagram when the diameter of the present invention does not need to be adjusted;

[0023] Figure 7 is the installation combination diagram of the main outer wing and the auxiliary outer wing of the present invention;

[0024] Figure 8 is the exploded view of the main outer wing and the auxiliary outer wing of the present invention.

[0025] In the figure: 1. Main body; 2. Inner cavity; 3. Vertical groove; 4. Main outer shell; 401. Outer helical teeth; 402. Inner inclined groove; 5. Auxiliary outer shell; 501. Inner helical teeth; 502. Auxiliary inner inclined groove; 6. Adjusting block; 601. Helical teeth; 7. Main outer wing; 8. Auxiliary outer wing; 9. Plug; 10. Wedge hole; 11. Wedge-shaped hole; 12. Filling block; 13. Straight groove; 14. Round hole; 15. Cylinder; 16. Boss. Detailed Embodiments

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Embodiment 1

[0028] Refer to Figure 1-8 , including a main body 1, characterized in that a cavity 2 is provided inside the main body 1, and a set of vertical grooves 3 are provided on both sides of the outer wall of the main body 1, and each set of vertical grooves 3 has two. One side of each vertical groove 3 is provided with an adjusting block 6, and one side of the four adjusting blocks 6 is fixedly connected with an inclined tooth 601. Main outer casings 4 are provided on both sides of the main body 1, and outer inclined teeth 401 are fixedly connected to both outer sides of the two main outer casings 4, and inner inclined grooves 402 are provided on one side of the inner sides of the two main outer casings 4. Sub-outer casings 5 are provided on both sides of the main body 1, and inner inclined teeth 501 for cooperating with the two outer inclined teeth 401 are fixedly connected to both inner sides of the two sub-outer casings 5. Sub-inner inclined grooves 502 for cooperating with the inclined teeth 601 are fixedly connected to one side of the inner sides of the two sub-outer casings 5. One side of one of the two sub-outer casings 5 is inserted with a main outer wing 7, and one side of one of the two main outer casings 4 is inserted with a sub-outer wing 8, and the main outer wing 7 and the sub-outer wing 8 are snap-connected. The cavity 2 is distributed in a conical shape, and the sub-inner inclined groove 502 and the inner inclined groove 402 are used in cooperation to form an inclined groove space.

[0029] When the diameter does not need to be adjusted, all the internal helical teeth 501 and the external helical teeth 401 are meshed and matched. When the diameter needs to be adjusted, the external helical teeth 401 can move relative to the internal helical teeth 501 and move along the direction of the helical teeth 601, allowing the main housing 4 and the auxiliary housing 5 to expand outwards, that is, the external helical teeth 401 can move outwards along the internal helical teeth 501. The minimum adjustable distance is the pitch of one helical tooth 601, but inward movement is not allowed. The adjusting block 6 is wedge-shaped, wider at the top and narrower at the bottom, with the slope direction upwards, matching the directions of the internal inclined groove 402 and the auxiliary internal inclined groove 502, allowing the helical teeth 601 to move downwards along the internal inclined groove 402 and the auxiliary internal inclined groove 502, but reverse movement is not allowed. One end of the adjusting block 6 without the helical teeth 601 has a slope, which cooperates with the vertical groove 3 of the main body 1. Similarly, the vertical groove 3 also has a slope, allowing the adjusting block 6 to slide downwards in the vertical groove 3. When the main housing 4 and the auxiliary housing 5 need diameter adjustment, press the adjusting block 6 downwards, and the helical teeth will slide downwards in the internal inclined groove 402 and the auxiliary internal inclined groove 502, but reverse sliding is not allowed. The pitch setting of the helical teeth 601 is such that when the helical teeth 601 slide down one pitch, the external helical teeth 401 and the internal helical teeth 501 expand outwards by one pitch. And the wedge degree setting of the adjusting block 6 is such that when the helical teeth 601 slide down one pitch and the main housing 4 and the auxiliary housing 5 open outwards by one pitch, the adjusting block 6 still contacts the internal inclined groove 402 and the auxiliary internal inclined groove 502, enabling continuous adjustment. The vertical groove 3 of the main body 1 is also designed with a taper, so that after the sleeve diameter expands, the adjusting block 6 moves along the diameter expansion direction accordingly, ensuring the contact between the adjusting block 6 and the main body 1, the main housing 4, and the auxiliary housing 5.

[0030] Embodiment 2

[0031] Refer to Figure 1-8 , a plurality of wedge holes 10 are opened on one side of the main outer wing 7 corresponding to the two auxiliary housings 5 and on one side of the auxiliary outer wing 8 corresponding to the two main housings 4. And a plurality of filling blocks 12 for cooperating with the wedge holes 10 are provided on one side of the main body 1. Straight grooves 13 are opened on one side of the main outer wing 7 and the auxiliary outer wing 8 opposite to each other. And a boss 16 is fixedly connected to one side of the main outer wing 7 and the auxiliary outer wing 8 close to the two straight grooves 13 respectively. A cylinder 15 is fixedly connected to one side of the two bosses 16 opposite to each other. And circular holes 14 are opened on the inner walls of the two straight grooves 13. The circular hole 14 on one side of the main outer wing 7 is engaged with the cylinder 15 on one side of the auxiliary outer wing 8, and the cylinder 15 on one side of the main outer wing 7 is engaged with the circular hole 14 on one side of the auxiliary outer wing 8. A plurality of plugs 9 are provided on one side of the main outer wing 7. And a plurality of wedge-shaped holes 11 for cooperating with the plurality of plugs 9 are opened on the bosses 16 on one side of the main outer wing 7 and the bosses 16 on one side of the auxiliary outer wing 8.

[0032] When the main outer wing 7 and the auxiliary outer wing 8 do not need to be adjusted, the wedge holes 10 provided on the main housing 4 and the wedge holes 10 designed on the auxiliary housing 5 have the same pitch as the inner inclined groove 402 and the pitch of the teeth of the auxiliary inner inclined groove 502. When the diameter expands by one pitch, the wedge holes 10 on the main housing 4 and the auxiliary housing 5 move a distance equal to the pitch of a wedge hole 10 and align with the wedge holes 10 on the main outer wing 7 and the wedge holes 10 on the auxiliary outer wing 8, and the filling block 12 can be inserted. The filling block 12 has different widths. When it is necessary to adjust the degree of outward expansion of the wingspan, a filling block 12 with an appropriate width can be selected and inserted into the wedge holes 10 on the main housing 4 and the auxiliary outer wing 8, and the wedge holes 10 on the auxiliary housing 5 and the main outer wing 7. The width between the main outer wing 7 and the auxiliary outer wing 8 can also be adjusted. That is, the boss 16 on the main outer wing 7 is inserted into the straight groove 13 on the auxiliary outer wing 8, the cylinder 15 on the main outer wing 7 enters the round hole 14 on the auxiliary outer wing 8, and the wedge-shaped holes 11 on the main outer wing 7 are aligned with the wedge-shaped holes 11 on the auxiliary outer wing 8. After alignment, the plug 9 is inserted. The plug 9 is wedge-shaped and is inserted into the wedge-shaped hole 11 and then tamped to achieve the stability of each component. When it is necessary to adjust the width of the wingspan, the wedge-shaped holes 11 on the main outer wing 7 and the wedge-shaped holes 11 on the auxiliary outer wing 8 expand relatively outward. When the required width is reached, the plug 9 is inserted and tamped.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly adaptable sleeve prosthesis that is easy to adjust, comprising a main body (1), characterized in that, The interior of the main body (1) is provided with an inner cavity (2), and a set of vertical grooves (3) are provided on both sides of the outer wall of the main body (1), and there are two vertical grooves (3) in each group. One side of each vertical groove (3) is provided with an adjusting block (6), and an inclined tooth (601) is fixedly connected to one side of each of the four adjusting blocks (6). Main outer shells (4) are provided on both sides of the main body (1), and outer inclined teeth (401) are fixedly connected to both outer sides of the two main outer shells (4), and inner inclined grooves (402) are provided on one inner side of the two main outer shells (4). Auxiliary outer shells (5) are provided on both sides of the main body (1), and inner inclined teeth (501) for cooperating with the two outer inclined teeth (401) are fixedly connected to both inner sides of the two auxiliary outer shells (5). One side of each of the two auxiliary outer shells (5) is fixedly connected with an auxiliary inner inclined groove (502) for cooperating with the inclined tooth (601). A main outer wing (7) is inserted into one side of one of the two auxiliary outer shells (5), and a sub-outer wing (8) is inserted into one side of one of the two main outer shells (4), and the main outer wing (7) and the sub-outer wing (8) are snap-connected to each other.

2. The adjustable high-adaptability sleeve prosthesis according to claim 1, characterized in that, A number of wedge holes (10) are provided on the side of the main outer wing (7) corresponding to the two auxiliary outer shells (5) and on the side of the sub-outer wing (8) corresponding to the two main outer shells (4), and a number of filling blocks (12) for cooperating with the wedge holes (10) are provided on one side of the main body (1).

3. The adjustable high-adaptability sleeve prosthesis according to claim 2, characterized in that, Straight grooves (13) are provided on the sides of the main outer wing (7) and the sub-outer wing (8) facing each other, and bosses (16) are fixedly connected to the sides of the main outer wing (7) and the sub-outer wing (8) close to the two straight grooves (13) respectively. A cylinder (15) is fixedly connected to one side of the two bosses (16) facing each other, and round holes (14) are provided on the inner walls of the two straight grooves (13).

4. The adjustable high-adaptability sleeve prosthesis according to claim 3, characterized in that, The round hole (14) on one side of the main outer wing (7) is snap-connected to the cylinder (15) on one side of the sub-outer wing (8), and the cylinder (15) on one side of the main outer wing (7) is snap-connected to the round hole (14) on one side of the sub-outer wing (8).

5. The adjustable high-adaptability sleeve prosthesis according to claim 3, characterized in that, A number of plugs (9) are provided on one side of the main outer wing (7), and a number of wedge-shaped holes (11) for cooperating with the number of plugs (9) are provided on the bosses (16) on one side of the main outer wing (7) and on the bosses (16) on one side of the sub-outer wing (8).

6. The adjustable high-adaptability sleeve prosthesis according to claim 1, characterized in that, The inner cavity (2) is distributed in a conical shape, and the auxiliary inner inclined groove (502) and the inner inclined groove (402) are used in cooperation to form an inclined groove space.

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