CN216908263U - Pelvis prosthesis and pelvis prosthesis assembly - Google Patents

Abstract

The utility model provides a pelvis prosthesis and a pelvis prosthesis assembly, wherein the pelvis prosthesis comprises a prosthesis body and a plurality of screws; the prosthesis body is of an integrated structure and comprises a cup part, a matching part and an insertion part; in use, the cup portion is for receiving a femoral head; one end of the matching part is connected with the cup part, the other end of the matching part is provided with a sacrum matching surface, and a plurality of screw holes matched with the screws are formed on the matching part near the sacrum matching surface; the inserting part comprises two inserting columns which are arranged in parallel, and one ends of the two inserting columns are connected to the sacrum matching surface. The pelvis prosthesis and the components thereof have good supporting strength and supporting firmness, and can effectively avoid and reduce falling, bending or deformation of the pelvis prosthesis in the moving and using process of a patient after clinical implantation.

Description

Pelvis prosthesis and pelvis prosthesis assembly

Technical Field

The utility model relates to the field of prostheses, in particular to a pelvic prosthesis and a pelvic prosthesis assembly.

Background

The pelvis is a good part of bone tumor, and because the pelvis is deep in the human body, the bone tumor at the pelvis is difficult to be found at an early stage, and when clinical symptoms occur, the tumor volume is large.

In the prior art, for bone tumor located at pelvis, clinical treatment is mostly performed by cutting pelvis and installing prosthesis, and at present, based on computer aided design and application of 3D printing technology, 3D printing prosthesis is gradually applied to reconstruction process after bone tumor is cut.

However, in actual clinical operation and application of the pelvic prosthesis formed based on 3D printing in the prior art, limitations still exist, such as that screws used for fixing the prosthesis and the pelvis are easy to loosen, and long-term stress can cause the screws used for connecting and fixing to bend, so that the stability of the prosthesis is deteriorated, and a patient needs a secondary operation, which gradually becomes a difficult problem and a common phenomenon encountered in clinical follow-up in later period.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a pelvic prosthesis and a pelvic prosthesis assembly for solving the problems of connection firmness and poor durability encountered with pelvic prostheses of the prior art.

To achieve the above objects and other related objects, the present invention includes the following technical solutions.

The utility model firstly provides a pelvis prosthesis, which comprises a prosthesis body and a plurality of screws; the prosthesis body is of an integrated structure and comprises a cup part, a matching part and an insertion part; in use, the cup portion is adapted to receive a femoral head; one end of the matching part is connected with the cup part, the other end of the matching part is provided with a sacrum matching surface, and a plurality of screw holes matched with the screws are formed on the matching part near the sacrum matching surface; the inserting part comprises two inserting columns which are arranged in parallel, and one ends of the two inserting columns are connected to the sacrum matching surface.

In a particular embodiment, in use, the first sacral foramina is positioned between two parallel-disposed insertion posts.

In a particular embodiment, the insertion column located above the first sacral foramina is longer than the insertion column located below the first sacral foramina.

In a particular embodiment, the insertion column located above the first sacral foramina is thicker than the insertion column located below the first sacral foramina.

In a more specific embodiment, the insertion post on the first sacral foramen has a diameter of 8-12 cm.

In a more specific embodiment, the insertion post on the first sacral foramina has a length of 6-12 cm.

In a more specific embodiment, the insertion post is 6-10 cm in diameter below the first sacral foramen.

In a more specific embodiment, the insertion post is 4-8 cm in length below the first sacral foramen.

In a specific embodiment, the number of the screws and the screw holes may be 1 to 10, such as 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

In a particular embodiment, the insertion post diameter is greater than the diameter of the screw 2.

In a more specific embodiment, the screw has a diameter of 5.5 to 7.5 cm.

In a specific embodiment, the distance between the two insertion columns is 1.5-3 cm.

The embodiment of the utility model also provides a pelvis prosthesis assembly, which comprises the pelvis prosthesis and the guide plate; the guide plate is provided with a matching surface matched with the surface of the sacrum, and two marrow hole guide holes penetrating through the guide plate are formed on the guide plate.

In a specific embodiment, the interval between the bone marrow hole guiding holes is the same as the interval between the two insertion pillars.

In a specific embodiment, the diameter of the bone marrow hole guiding hole is 1.5-3 cm.

As described above, the pelvic prosthesis and the pelvic prosthesis assembly according to the present invention have the following advantageous effects:

according to the utility model, the pelvis prosthesis and the components thereof have good supporting strength and supporting firmness, and can effectively avoid and reduce falling, bending or deformation of the pelvis prosthesis in the moving and using process of a patient after clinical implantation.

Drawings

Fig. 1 shows a schematic structural view of a pelvic prosthesis according to the utility model.

Fig. 2 shows a schematic view of the structure of the guide plate of the present invention.

Fig. 3 shows a schematic structural view of the pelvic prosthesis according to the utility model.

The reference numerals in FIGS. 1 to 3 are explained below:

1 prosthesis body

11 cup part

12 mating part

13 insertion part

131 inserting pole

14 screw hole

2 screw

3 guide plate

31 bone marrow hole guide hole

4 sacrum

5 first sacral foramen

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1 and 3, the present invention firstly provides a pelvic prosthesis, which comprises a prosthesis body 1 and a plurality of screws 2; the prosthesis body 1 is of an integrated structure and comprises a cup part 11, a matching part 12 and an insertion part 13; in use, the cup portion 11 is adapted to receive a femoral head; one end of the matching part 12 is connected with the cup part 11, the other end is provided with a matching surface with a sacrum, and a plurality of screw holes 14 matched with the screws 2 are formed on the matching part 12 near the sacrum matching surface; the insertion portion 13 includes two insertion columns 131 arranged in parallel, and one ends of the two insertion columns 131 are connected to the sacrum mating surface.

In a particular embodiment, in use, the first sacral foramen 5 is positioned between two insertion posts 131 that are arranged in parallel.

In a particular embodiment, the insertion column 131 located above the first sacral foramina 5 is longer than the insertion column 131 located below the first sacral foramina 5.

In a particular embodiment, the insertion column 131 located above the first sacral foramina 5 is thicker than the insertion column 131 located below the first sacral foramina 5.

In a more specific embodiment, the insertion post located on the first sacral foramen 5 has a diameter of 8-12 cm.

In a more specific embodiment, the insertion post located on the first sacral foramen 5 has a length of 6-12 cm.

In a more specific embodiment, the insertion post is 6-10 cm in diameter below the first sacral foramen 5.

In a more specific embodiment, the insertion post is 4-8 cm in length below the first sacral foramina.

In a specific embodiment, the number of the screws 2 and the screw holes 14 may be 1 to 10, such as 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10.

In a specific embodiment, the insertion post 131 has a diameter greater than the diameter of the screw 2.

In a more specific embodiment, the diameter of the screw 2 is 5.5-7.5 cm.

In a specific embodiment, the distance between two insertion posts 131 is 1.5-3 cm.

As shown in fig. 1 and 2, a pelvic prosthesis assembly is also provided in an embodiment of the utility model, comprising the pelvic prosthesis and the guide plate 3 described above; the guide plate 3 is formed with a fitting surface which is fitted to the surface of the sacrum, and two bone marrow hole guide holes 31 penetrating the guide plate are formed on the guide plate 3.

In a specific embodiment, the interval between the bone marrow hole guiding holes 31 is the same as the interval between the two insertion pillars 131.

In a specific embodiment, the diameter of the bone marrow hole guiding hole 31 is 1.5-3 cm.

When the pelvis prosthesis assembly is used, firstly, the guide plate 3 is adopted, the matching surface of the guide plate 3 is fixed on a sacrum 4 of a patient, then, a bone marrow drill is used for drilling a hole into the sacrum 4 from a bone marrow hole guide hole 31 on the guide plate, and two bone marrow holes are formed on the sacrum 4; the guide plate is then removed, the two insertion columns 131 on the pelvic prosthesis are inserted into said two medullary cavities, and the prosthesis body is then fixed to the sacrum using screws, thus completing the fixed connection between the pelvic prosthesis and the sacrum of the patient.

According to the pelvic prosthesis and the components thereof disclosed by the utility model, the two insertion columns which are integrally designed with the pelvic prosthesis are introduced, so that the pelvic prosthesis has good supporting strength and supporting firmness in the process of keeping the pelvic prosthesis in a patient body after being implanted, and the falling, bending or deformation of the pelvic prosthesis in the process of moving and using the patient after the pelvic prosthesis is clinically implanted can be effectively avoided and reduced. Moreover, the two parallel insertion columns are positioned above and below the first sacral foramen 5 when in use, can effectively avoid the nerve part of the human body, and can effectively form a stable fixed shape with the sacrum after being inserted into the sacrum 4, thereby playing the effects of auxiliary support, fixation and stress support.

In conclusion, the pelvic prosthesis has a compact structure, is very suitable for clinical use, and can effectively avoid the problems of falling, bending or deformation of the pelvic prosthesis in the prior art caused by the movement and use of a patient after clinical implantation. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. Pelvic prosthesis, characterized in that it comprises a prosthesis body (1) and a number of screws (2); the prosthesis body (1) is of an integrated structure and comprises a cup part (11), a matching part (12) and an insertion part (13); in use, the cup portion (11) is adapted to receive a femoral head; one end of the matching part (12) is connected with the cup part (11), the other end of the matching part is provided with a sacrum matching surface, and a plurality of screw holes (14) matched with the screws (2) are formed on the matching part (12) near the sacrum matching surface; the insertion part (13) comprises two insertion columns (131) which are arranged in parallel, and one ends of the two insertion columns (131) are connected to the sacrum matching surface.

2. The pelvic prosthesis of claim 1, wherein the first sacral aperture is located between two parallel-disposed insertion posts (131).

3. The pelvic prosthesis of claim 2, wherein the insertion post (131) located above the first sacral foramina is longer than the insertion post (131) located below the first sacral foramina.

4. The pelvic prosthesis of claim 2, wherein the insertion column (131) located above the first sacral foramina is thicker than the insertion column (131) located below the first sacral foramina.

5. The pelvic prosthesis of claim 2, wherein the insertion post (131) on the first sacral foramina has a diameter of 8-12 cm; and/or the diameter of the insertion column (131) below the first sacral foramen is 6-10 cm.

6. The pelvic prosthesis according to claim 2, wherein the insertion column (131) located on the first sacral foramina has a length of 6-12 cm; and/or the length of the insertion column (131) below the first sacral foramen is 4-8 cm; and/or the distance between the two insertion columns (131) is 1.5-3 cm.

7. Pelvic prosthesis according to claim 1, characterized in that the number of screws (2) and screw holes (14) is 1-10; and/or the diameter of the insertion column (131) is larger than the diameter of the screw (2); and/or the diameter of the screw (2) is 5.5-7.5 cm.

8. Pelvic prosthesis assembly, characterized in that it comprises a pelvic prosthesis and a guide plate (3) according to any of claims 1 to 7; the guide plate (3) is provided with a matching surface matched with the surface of the sacrum, and two bone marrow hole guide holes (31) penetrating through the guide plate are formed on the guide plate (3).

9. Pelvic prosthesis assembly according to claim 8, characterized in that the spacing between the medullary cavity guiding holes (31) is the same as the spacing between two insertion columns (131).

10. The pelvic prosthesis assembly of claim 8, wherein: the diameter of the bone marrow hole guiding hole (31) is 1.5-3 cm.

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