CN216318223U - Adjustable semi-pelvis prosthesis device - Google Patents

Abstract

The application relates to the technical field of medical prosthesis, in particular to an adjustable hemi-pelvic prosthesis device. The device comprises a half pelvic prosthesis part matched with the shape of a pelvic bone defect, wherein the half pelvic prosthesis part comprises an upper retaining part, a connecting part and a lower retaining part, the upper retaining part is used for retaining and strengthening lateral ilium or sacrum, and the lower retaining part is used for retaining and strengthening lateral pubis; the device further comprises a cup prosthesis; the connecting part is provided with a rotating component for adjusting the angle of the acetabular cup prosthesis; the rotating assembly is also provided with a stop piece detachably connected with the rotating assembly. This application can be through the anteversion angle and the abduction angle of the hip center of rotation of individualized pelvis prosthesis of secondary fine setting in the art. Thereby avoiding the dislocation complication of the prosthesis after the operation and improving the movement and the living ability of the patient after the personalized pelvis prosthesis is placed into the operation.

Description

Adjustable semi-pelvis prosthesis device

Technical Field

The application relates to the technical field of medical prosthesis, in particular to an adjustable hemi-pelvic prosthesis device.

Background

The pelvis is one of the common diseased parts of the bone tumor, and the ideal treatment mode is surgical excision reconstruction for the pelvis malignant tumor at present. Surgical resection can result in large bone defects in the patient's pelvis, and the current solution is to implant a personalized pelvic prosthesis to achieve continuity and stability between the patient's pelvis and other bone tissues and maintain the patient's normal living functions. The design of the implanted artificial hemi-pelvic prosthesis is crucial to postoperative recovery, the current hemi-pelvic prosthesis is generally an integrated whole design, the rotation center of the hip joint cannot be adjusted, and the postoperative effect and the living and moving ability of a patient can be evaluated according to the accuracy of the rotation center of the patient.

With the development of bone tumor surgical diagnosis and treatment technology, the survival rate of the pelvis malignant tumor patients is continuously improved, and the life quality and the activity are also obviously improved. In the design of the existing personalized pelvis prosthesis, although the hip joint rotation center of the integrated prosthesis is designed by referring to the healthy side rotation center before the operation, in the actual operation process, because the two ends of the pubic ramus and the iliac ramus are fixed and have deviation from the ideal state, the hip joint rotation center of the integrated planning prosthesis after being actually implanted often has obvious deviation compared with the healthy side.

Due to the disadvantages of the prior art, the pelvis prosthesis is prevented from dislocation basically according to the self-locking nail holes, the spiral locking structure and the like, and the pelvis prosthesis which can adjust the position of the hip rotation center after fixing the pubic ramus and the iliac ramus in the operation is not available in the prior art. The current intraoperative design concept for adjusting the hip rotation center is still blank in the design of pelvic prostheses.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, it is an object of the present application to provide an adjustable hemi-pelvic prosthesis device that solves the problems of the prior art.

To achieve the above and other related objects, the present application provides an adjustable hemi-pelvic prosthesis device, which includes a hemi-pelvic prosthesis portion having a shape matching a pelvic defect, the hemi-pelvic prosthesis portion including an upper holder for holding a healthy lateral ilium or sacrum, a connecting portion, and a lower holder for holding a healthy lateral pubic bone, which are connected in this order; the device further comprises a cup prosthesis; the connecting part is provided with a rotating component for adjusting the angle of the acetabular cup prosthesis; the rotating assembly is also provided with a stop piece detachably connected with the rotating assembly.

In some embodiments of the utility model, the rotating assembly comprises a housing and a movable sphere disposed in the housing; the shell is arranged on the connecting part, and the movable sphere is connected with the acetabular cup prosthesis.

In some embodiments of the utility model, the diameter of the housing is greater than the diameter of the movable sphere.

In some embodiments of the utility model, the movable sphere is connected to the cup prosthesis by a connecting column.

In some embodiments of the utility model, the housing is provided with one or more bone block implant holes.

In some embodiments of the utility model, a bone block is disposed within the housing.

In some embodiments of the utility model, the rotating assembly is provided with a through hole which is matched with the stop piece; the stop member includes one or more set screws.

In some embodiments of the utility model, the cup prosthesis is provided with a femoral head prosthesis at an end remote from the rotating assembly; a femoral stem is arranged on one side of the femoral head prosthesis, which is far away from the mortar cup prosthesis.

In some embodiments of the utility model, the abduction angle of the cup prosthesis with respect to the rotation assembly is 5.0 ° to 30.2 ° upon secondary adjustment of the rotation angle.

In some embodiments of the utility model, the cup prosthesis rotates with respect to the rotating assembly at an inclination angle of 3.7 ° to 30.2 °.

In some embodiments of the utility model, the acetabular cup prosthesis is rotated relative to the rotating assembly at an anteversion angle of 2.3 ° to 34.3 °.

In some embodiments of the utility model, the acetabular cup prosthesis is rotated relative to the rotating assembly at a posterior slope angle of 0.9 ° to 30.2 °.

In some embodiments of the utility model, the superior retainer is connected to the lateral retention ilium or sacrum by fasteners; the lower retainer is clamped with the healthy lateral pubis.

Compared with the prior art, the beneficial effects of this application are as follows:

the application provides a half pelvis false body device with adjustable effectively solves among the prior art according to the integration pelvis false body of healthy side hip center of rotation design, after fixed with pubis, ilium in the art, technical problem when actually implanting the hip center of rotation of false body and having great deviation, reaches the doctor and after tentatively fixing the pelvis false body, can secondary fine setting individualized pelvis false body's hip center of rotation's anteversion angle and abduction angle. Thereby avoiding the dislocation complication of the prosthesis after the operation and improving the movement and the living ability of the patient after the personalized pelvis prosthesis is placed into the operation.

Drawings

Fig. 1 is a perspective view of an adjustable hemi-pelvic prosthetic device according to the present application.

Fig. 2 is a perspective view of an adjustable hemi-pelvic prosthesis device according to the present application.

Fig. 3 is a perspective view of an adjustable hemi-pelvic prosthetic device of the present application at an angle of use.

Fig. 4 is a perspective view of another embodiment of the adjustable hemi-pelvic prosthetic device of the present application.

Description of the element reference numerals

1 half pelvic prosthesis part

11 upper retention part

12 connecting part

13 lower retention part

2 rotating assembly

21 casing

211 bone block implant hole

22 movable ball

3 mortar cup prosthesis

4 femoral head prosthesis

Femoral stem 5

6 stop

7 connecting column

8 fastener

9 healthy side half pelvis

91 ilium bone

92 sacrum

93 pubic bone

Detailed Description

In the description of the present application, it should be noted that the devices, ratios, sizes, and the like shown in the drawings attached to the present application are only used for matching the disclosure of the present application, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present application can be implemented, so that the present application has no technical essence, and any modification of the devices, changes of the ratio relationships, or adjustments of the sizes, should still fall within the scope that the technical disclosure of the present application can cover without affecting the efficacy and the achievable purpose of the present application. While the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1 to 4, the embodiment of the present application provides an adjustable semi-pelvic prosthesis device, which comprises a semi-pelvic prosthesis part 1 matched with the shape of a pelvic bone defect, wherein the semi-pelvic prosthesis part 1 comprises an upper fixing part 11 for fixing a health-care side ilium 91 or sacrum 92, a connecting part 12 and a lower fixing part 13 for fixing a health-care side pubis 93 which are connected in sequence; the device further comprises a cup prosthesis 3; the connecting part 12 is provided with a rotating component 2 for adjusting the angle of the acetabular cup prosthesis 3; the rotating assembly 2 is also provided with a stop piece 6 which is detachably connected with the rotating assembly 2. The half pelvis prosthesis 1 is fixed on a half pelvis part which is removed after operation, in particular to an ilium 91 or a sacrum 92 which is fixed on a healthy side through an upper fixing part 11; through lower retention portion 13 maintenance in the pubis 93 of healthy side, the doctor makes cup prosthesis 3 rotate certain angle for rotating assembly 2 according to patient's actual conditions within range that measures in advance again in the art, passes through the fixed rotating assembly 2 of stopper 6 after cup prosthesis 3 rotates the suitable position, and fixed back cup prosthesis 3 no longer rotates for rotating assembly 2. This application can be through the anteversion angle and the abduction angle of the hip center of rotation of individualized pelvis prosthesis of secondary fine setting in the art. Thereby avoiding the dislocation complication of the prosthesis after the operation and improving the movement and the living ability of the patient after the personalized pelvis prosthesis is placed into the operation.

In the adjustable semi-pelvic prosthesis device provided in the embodiment of the present application, as shown in fig. 3 and 4, the pelvis comprises a healthy side semi-pelvis 9 (healthy side, i.e. healthy side) and an affected side semi-pelvic prosthesis 1, and the semi-pelvic prosthesis 1 generally conforms to the conventional human physiological structure, i.e. the semi-pelvic prosthesis 1 and the healthy side semi-pelvis 9 are nearly symmetrical structures. The pelvis defect position is a half pelvis resection surface after resection, and the shape matching of the half pelvis prosthesis and the pelvis defect position specifically means: the half pelvic prosthesis portion 1 substantially conforms to the outer contour of the portion to be fitted to the pelvic defect. Typically, the connecting portion 12 includes a sacral prosthesis that matches the resected at least partial sacrum 92 and a pubic prosthesis that matches the resected at least partial pubic bone 93. The upper fixture 11 can be fixed to the sacrum 92 if the loss is serious after the post-operation resection, or can be fixed to the residual ilium 91 if the residual ilium 91 remains after the post-operation resection, according to the actual condition of the patient. The half pelvic prosthesis portion 1 is formed by connecting the upper retention portion 11, the connecting portion 12, and the lower retention portion 13 in this order. In one embodiment, the connection of the upper retention portion 11, the connection portion 12 and the lower retention portion 13 may be a fixed connection, for example.

In the adjustable hemi-pelvic prosthesis device provided in the embodiment of the present application, as shown in fig. 2, the rotating assembly 2 includes a housing 21 and a movable ball 22 disposed in the housing 21; the movable sphere 22 can rotate relative to the housing 21. The housing 21 is disposed on the connecting portion 12, and the connecting manner may be, for example, a fixed connection. The movable sphere 22 is connected to the cup prosthesis 3, for example, in a fixed manner. The cup prosthesis 3 rotates with the movable sphere 22 relative to the shell 21. In some embodiments, the housing 21 may be, for example, a hollow sphere, and the diameter of the housing 21 is larger than the diameter of the movable sphere 22. Specifically, the diameter of the housing 21 may be, for example, 30mm to 50 mm; 30 mm-40 mm; 40 mm-50 mm; 30 mm-35 mm; 35 mm-40 mm; 40 mm-45 mm; or 45mm to 50mm, etc. The diameter of the movable sphere 22 may be, for example, 15mm to 30 mm; 15 mm-20 mm; 20 mm-25 mm; or 25mm to 30mm, etc.

In the adjustable hemi-pelvic prosthesis device provided by the embodiment of the present application, as shown in fig. 1 and 2, the movable sphere 22 is connected with the cup prosthesis 3 through the connecting column 7, so that the movable range of the cup prosthesis 3 can be limited to a certain extent.

In the adjustable hemi-pelvic prosthesis device according to the embodiment of the present application, as shown in fig. 3 and 4, one or more bone block implant holes 211 are formed in the housing 21. Bone blocks are arranged in the shell 21. The bone pieces may be, for example, cancellous bone pieces, and more specifically, may be artificial cancellous bone, autologous cancellous bone, or the like. The interface friction force can be increased by implanting cancellous bone pieces, and the cancellous bone pieces can be fused, so that the stability of the prosthesis can be increased.

In the adjustable semi-pelvic prosthesis device provided by the embodiment of the application, the rotating component 2 is provided with a through hole matched with the stop piece 6; the stop 6 comprises one or more set screws. The fixing screws correspond to the through holes one by one, and the through holes are uniformly distributed on the shell 21, so that the fixing after adjustment in the operation can be better matched.

In the adjustable semi-pelvic prosthesis device provided by the embodiment of the application, as shown in fig. 1 and 2, a femoral head prosthesis 4 is arranged at one end of the cup prosthesis 3 away from the rotating component 2; and a femoral stem 5 is arranged on one side of the femoral head prosthesis 4 far away from the mortar cup prosthesis 3.

In the adjustable hemi-pelvic prosthesis device that this application embodiment provided, before the doctor before the art can advance healthy side rotation center carry out mirror image design affected side to through once adjusting, rotate to mirror image design's angle, nevertheless because the fixed and ideal state of both ends of pubic bone 93 and ilium 91 have the deviation, often cause that its hip joint rotation center and healthy side contrast of integration planning prosthesis after actually implanting have obvious deviation. Therefore, the rotation angle needs to be adjusted secondarily in the operation according to the actual situation of the patient, and the abduction angle of the cup prosthesis 3 rotating relative to the rotating assembly 2 during the secondary adjustment in the operation can be 5.0 ° to 30.2 °, 5.0 ° to 10.0 °, 10.0 ° to 15.0 °, 15.0 ° to 20.0 °, 20.0 ° to 25.0 °, or 25.0 ° to 30.2 °. The abduction angle is in particular in accordance with the angular direction of the thigh laterally outwardly deflected. The included angle of the cup prosthesis 3 with respect to the rotation of the rotating assembly 2 may be 3.7-30.2 °, 3.7-5.0 °, 5.0-10.0 °, 10.0-15.0 °, 15.0-20.0 °, 20.0-25.0 °, or 25.0-30.2 °, etc. The inclination angle is in particular aligned with the angular direction in which the thigh is deflected laterally towards its inner side. The anteversion angle of the cup prosthesis 3 rotating relative to the rotating component 2 can be 2.3-34.3 degrees, 2.3-5.0 degrees, 5.0-10.0 degrees, 10.0-15.0 degrees, 15.0-20.0 degrees, 20.0-25.0 degrees, 25.0-30.0 degrees, or 30.0-34.3 degrees, etc. The anteversion angle is specifically aligned with the angular direction of the thigh side towards its front. The retroversion angle of the rotation of the cup prosthesis 3 relative to the rotating component 2 can be 0.9-32.2 °, 0.9-3.0 °, 3.0-5.0 °, 5.0-10.0 °, 10.0-15.0 °, 15.0-18.0 °, 18.0-20.0 °, 20.0-25.0 °, or 25.0-30.2 ° and the like. The caster angle is specifically aligned with the angular direction in which the thigh is deflected laterally to its rear.

In the adjustable hemi-pelvic prosthesis device provided in the embodiments of the present application, generally, the fixing manner of the upper retention portion 11 and the retaining ilium 91 or sacrum 92 and the fixing manner of the lower retention portion 13 and the pubic bone 93 are not limited. In some embodiments, the upper retention portion 11 and the retention ilium 91 or the sacrum 92 can be connected by the fastener 8, and the upper retention portion 11 is provided with a retention hole matching with the fastener 8. The fastener 8 may be a screw, for example. The lower retention part 13 is clamped with the pubis 93, and the lower retention part 13 can be clamped with the healthy lateral pubis 93.

In the adjustable hemi-pelvic prosthesis device provided in the embodiments of the present application, the upper retention portion 11 may be, for example, an upper retention plate, and the shape of the upper retention plate matches with the cross section of the healthy lateral ilium 91 or the sacrum 92, and the size of the upper retention plate is substantially the same. For example, the length of the upper retention plate may be 80mm to 140mm, 80mm to 100mm, 100mm to 140mm, 80mm to 90mm, 90mm to 100mm, 100mm to 110mm, 110mm to 120mm, 120mm to 130mm, 130mm to 140mm, or the like. The width of the upper retention plate can be 25 mm-75 mm, 25 mm-45 mm, 45 mm-75 mm, 25 mm-35 mm, 35 mm-45 mm, 45 mm-55 mm, 55 mm-65 mm, or 65 mm-75 mm, etc. The height of the upper retention plate can be 10 mm-30 mm, 10 mm-20 mm, 20 mm-30 mm, 10 mm-15 mm, 15 mm-20 mm, 20 mm-25 mm, or 25 mm-30 mm, etc. The lower retention portion 13 may be, for example, a lower retention plate, which in one embodiment is provided with a slot for engaging the lateral pubic bone 93. The shape of the lower retention plate matches the shape of the healthy lateral pubic bone 93 and the size is basically the same. For example, the length of the lower retention plate is 25mm to 75mm, 25mm to 45mm, 45mm to 75mm, 25mm to 35mm, 35mm to 45mm, 45mm to 55mm, 55mm to 65mm, or 65mm to 75 mm. The width of the lower retention plate can be 15 mm-55 mm, 15 mm-35 mm, 35 mm-55 mm, 15 mm-25 mm, 25 mm-35 mm, 35 mm-45 mm, or 45 mm-55 mm, etc. For example, the height of the lower retention plate is 10mm to 25mm, 10mm to 15mm, 15mm to 20mm, or 20mm to 25 mm. The arc length of the connecting portion 12 may be 200mm to 400mm, 200mm to 300mm, 300mm to 400mm, 200mm to 250mm, 250mm to 300mm, 300mm to 350mm, 350mm to 400mm, or the like. The diameter of the connecting portion 12 may be 150mm to 250mm, 150mm to 200mm, 200mm to 250mm, 150mm to 180mm, 180mm to 200mm, 200mm to 220mm, 220mm to 250mm, or the like.

The working process of the embodiment of the application is as follows:

in the resection operation of the semi-pelvis malignant tumor, a doctor resects the malignant tumor and peripheral bony structures, after the resection operation, as shown in fig. 3 and 4, an upper fixing plate is fixed with a healthy side ilium 91 or a sacrum 92 through a fastener 8, a lower fixing plate is clamped with a healthy side pubic bone 93 through a clamping groove, so that the semi-pelvis prosthesis part 1 and the healthy side pelvis can be fixed, the doctor adjusts a rotating component 2 in a certain range (the range is obtained by early measurement) according to the actual condition of a patient in the operation, so that a cup prosthesis 3 and a movable ball rotate relative to a shell 21, the cup prosthesis is fixed through a fixed screw, and the postoperative life and the motion ability of the patient are confirmed by actions such as bending knees and the like of the patient according to the adjusted condition, and when the adjustment effect in the operation is poor, the adjustment can be carried out again until the basic motion ability of the patient is perfect. In addition, if necessary, after fixation, the interface friction force and the fusion of the cancellous bone pieces can be increased by implanting the cancellous bone pieces into the shell 21, so that the stability of the prosthesis can be increased.

In conclusion, the adjustable semi-pelvic prosthesis device provided by the application effectively solves the technical problem that the hip rotation center of the actually implanted prosthesis has large deviation after the integrated pelvic prosthesis designed according to the hip rotation center of the healthy side in the prior art is fixed with the pubis 93 and the ilium 91 in the operation, and achieves the effect that a doctor can finely adjust the forward inclination angle and the abduction angle of the hip rotation center of the personalized pelvic prosthesis for the second time after the pelvic prosthesis is preliminarily fixed. Thereby avoiding the dislocation complication of the prosthesis after the operation and improving the movement and the living ability of the patient after the personalized pelvis prosthesis is placed into the operation.

In conclusion, the present application effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. 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 concepts disclosed in the present application shall be covered by the claims of the present application.

Claims (10)

1. An adjustable semi-pelvic prosthesis device, characterized in that the device comprises a semi-pelvic prosthesis part (1) matched with the shape of a pelvic bone defect, wherein the semi-pelvic prosthesis part (1) comprises an upper retainer (11) for retaining a healthy lateral ilium or sacrum, a connecting part (12) and a lower retainer (13) for retaining a healthy lateral pubic bone which are connected in sequence; the device further comprises a cup prosthesis (3); the connecting part (12) is provided with a rotating component (2) for adjusting the angle of the acetabular cup prosthesis (3); the rotating assembly (2) is also provided with a stop piece (6) detachably connected with the rotating assembly (2).

2. The adjustable hemi-pelvic prosthesis device according to claim 1, characterized in that the rotating assembly (2) comprises a housing (21) and a movable sphere (22) disposed in the housing (21); the shell (21) is arranged on the connecting part (12), and the movable sphere (22) is connected with the mortar cup prosthesis (3).

3. The adjustable hemi-pelvic prosthetic device of claim 2, characterized in that the housing (21) has a diameter greater than the diameter of the movable sphere (22).

4. The adjustable hemi-pelvic prosthesis device according to claim 2, characterized in that the movable sphere (22) is connected to the cup prosthesis (3) by means of a connection column (7).

5. The adjustable hemi-pelvic prosthetic device of claim 2, characterized in that the housing (21) is provided with one or more bone block implant holes (211).

6. The adjustable hemi-pelvic prosthetic device of claim 2, characterized in that bone blocks are provided in the housing (21).

7. The adjustable hemi-pelvic prosthesis device according to claim 1, characterized in that the rotating member (2) is provided with a through hole cooperating with the stop (6); the stop (6) comprises one or more set screws.

8. The adjustable hemi-pelvic prosthesis device according to claim 1, characterized in that the end of the cup prosthesis (3) remote from the rotating assembly (2) is provided with a femoral head prosthesis (4); a femoral stem (5) is arranged on one side of the femoral head prosthesis (4) far away from the mortar cup prosthesis (3).

9. The adjustable hemi-pelvic prosthesis device according to claim 1, characterized in that the abduction angle of the cup prosthesis (3) with respect to the rotation assembly (2) is 5.0 ° to 30.2 ° at the second adjustment of the rotation angle;

the internal inclination angle of the mortar cup prosthesis (3) rotating relative to the rotating component (2) is 3.7-30.2 degrees;

the anteversion angle of the acetabular cup prosthesis (3) rotating relative to the rotating component (2) is 2.3-34.3 degrees;

the retroversion angle of the acetabular cup prosthesis (3) rotating relative to the rotating component (2) is 0.9-30.2 degrees.

10. The adjustable hemi-pelvic prosthesis device according to claim 1, characterized in that the upper retention portion (11) is connected with the lateral retention ilium or sacrum by means of fasteners (8); the lower retainer (13) is clamped with the lateral healthy pubic bone.

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