CN219332112U - Acetabular prosthesis - Google Patents

Abstract

The present utility model provides an acetabular prosthesis comprising: an acetabular cup substrate, wherein an operation hole and a first fixing hole are arranged on the acetabular cup substrate at intervals; the filling block is arranged on the outer surface of the acetabular cup matrix, and is provided with a second fixing hole communicated with the first fixing hole; and one part of the fixing nail is connected in the second fixing hole, and the other part of the fixing nail penetrates through the second fixing hole. The technical scheme of the application effectively solves the problem that the fixing effect of the acetabular prosthesis in the related technology is poor.

Description

Acetabular prosthesis

Technical Field

The utility model relates to the field of medical instruments, in particular to an acetabular prosthesis.

Background

Hip arthroplasty is one of the most serious surgical operations for 50 years, and can effectively eliminate pain of patients, correct hip joint deformity and restore the activity function of the patients. With the popularity of primary hip replacement surgery, the amount of revision surgery is also continually increasing.

The revision surgery of a patient is usually accompanied with bone defect, and when facing to the cavity-gap-type bone defect, the acetabular cup of the acetabular prosthesis in the related art cannot be filled to the cavity-gap-type bone defect, and is easy to loosen, so that the fixing effect of the acetabular prosthesis is poor.

Disclosure of Invention

The utility model mainly aims to provide an acetabular prosthesis to solve the problem that the fixing effect of the acetabular prosthesis in the related art is poor.

To achieve the above object, the present utility model provides an acetabular prosthesis comprising: an acetabular cup substrate, wherein an operation hole and a first fixing hole are arranged on the acetabular cup substrate at intervals; the filling block is arranged on the outer surface of the acetabular cup matrix, and is provided with a second fixing hole communicated with the first fixing hole; and one part of the fixing nail is connected in the second fixing hole, and the other part of the fixing nail penetrates through the second fixing hole.

Further, the shape of the filling block is at least 1/4 of the spherical shell.

Further, the filling block is provided with a first outer end edge and a second outer end edge which are oppositely arranged along the peripheral direction of the acetabular cup matrix, the first outer end edge of the filling block protrudes out of the outer surface of the acetabular cup matrix in the radial direction of the acetabular cup matrix, and the second outer end edge and the side edge of the inner surface of the filling block are arranged in a sharing mode.

Further, the operation hole is located the central point department of acetabular cup base member, and first fixed orifices is located the circumference outside of operation hole, is provided with the anticreep stopper in the first fixed orifices, and the terminal surface extrusion fit of anticreep stopper and staple.

Further, the anti-drop plug is a round table, and the first fixing hole is a taper hole in interference fit with the round table; or, the outer surface of the anti-drop plug is provided with external threads, and the first fixing hole is internally provided with internal threads connected with the external threads.

Further, the filler piece is positionally adjustably disposed on an outer surface of the acetabular cup base.

Further, the acetabular cup base body is further provided with a through hole, the filling block is further provided with a plurality of screw holes matched with the through hole, and the adjusting piece penetrates through the through hole and is selectively connected into one screw hole so as to adjust the position of the filling block on the outer surface of the acetabular cup base body.

Further, the inner surface of the acetabular cup base body is provided with a plurality of countersink, the number of through holes is smaller than that of screw holes, and the adjusting piece can selectively penetrate through one through hole and be selectively connected in one screw hole.

Further, the acetabular prosthesis may further comprise a wing removably attached to an end face of the acetabular cup body and/or the filler block.

Further, the end surfaces of the acetabular cup base body and the filling block are respectively provided with a first mounting hole, the wing plate is provided with a second mounting hole corresponding to the first mounting holes, and the fastening piece penetrates through the first mounting holes and the second mounting holes to fix the wing plate on the end surfaces of the acetabular cup base body and/or the filling block.

By applying the technical scheme of the utility model, the acetabular prosthesis comprises: acetabular cup matrix, filler blocks and fixation nails. The acetabular cup base body is provided with an operation hole and a first fixing hole at intervals. The packing block is arranged on the outer surface of the acetabular cup matrix. The filling block is provided with a second fixing hole communicated with the first fixing hole. One part of the fixing nail is connected in the second fixing hole, and the other part of the fixing nail penetrates through the second fixing hole. Like this, the filling piece can be filled to cavity gap type bone defect department for patient's bone defect department becomes more complete, and can insert into the operation hole through implantation instrument, be used for implanting the acetabular prosthesis and fix acetabular cup base member and filling piece together at cavity gap type bone defect department through the staple, make acetabular cup base member can laminate on the acetabulum, avoid acetabular prosthesis not hard up, improved fixed initial stability effectively, improved fixed effect. Therefore, the technical scheme of the application effectively solves the problem of poor fixation effect of the acetabular prosthesis in the related technology.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic cross-sectional view of an embodiment one of an acetabular prosthesis according to the utility model;

FIG. 2 illustrates a schematic cross-sectional view of the acetabular cup base and packing block of the acetabular prosthesis of FIG. 1 in another position without an adjustment installed;

FIG. 3 shows a schematic cross-sectional view of the acetabular prosthesis of FIG. 2 in another position with an adjustment member installed;

FIG. 4 shows a schematic perspective view of the acetabular prosthesis of FIG. 1 with an adjustment member installed;

FIG. 5 illustrates an exploded view of the acetabular cup base and packing block of the acetabular prosthesis of FIG. 1;

FIG. 6 shows a schematic top view of a staple of the acetabular prosthesis of FIG. 1;

FIG. 7 shows a schematic top view of the anti-slip plug of the acetabular prosthesis of FIG. 1;

FIG. 8 shows a schematic cross-sectional view of the packing block of the acetabular prosthesis of FIG. 1 filling at a lacunar bone defect;

fig. 9 shows a schematic top view of a plug of a second embodiment of an acetabular prosthesis according to the utility model;

fig. 10 shows a schematic top view of a staple of a third embodiment of an acetabular prosthesis according to the utility model.

Wherein the above figures include the following reference numerals:

1. a lacuna bone defect;

10. an acetabular cup base; 11. an operation hole; 12. a first fixing hole; 13. a first mounting hole; 14. a through hole; 15. sinking grooves;

20. filling blocks; 21. a second fixing hole; 22. a first outer end edge; 23. a second outer end edge; 24. a screw hole;

30. fixing nails; 31. an adjusting member; 40. an anti-drop plug;

50. a wing plate; 51. a fastener; 52. a second mounting hole;

60. porous structure.

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. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 8, an acetabular prosthesis according to a first embodiment includes: an acetabular cup base 10, a packing 20 and a staple 30. The acetabular cup body 10 is provided with an operation hole 11 and a first fixing hole 12 at intervals. The packing block 20 is provided on the outer surface of the acetabular cup base body 10, and a second fixing hole 21 communicating with the first fixing hole 12 is provided on the packing block 20. The fixing nail 30 is connected in the second fixing hole 21 at a part of the fixing nail 30, and another part of the fixing nail 30 is penetrated out of the second fixing hole 21.

With the solution of the first embodiment, the packing elements 20 are arranged on the outer surface of the acetabular cup base body 10. The packing block 20 is provided with a second fixing hole 21 communicating with the first fixing hole 12. The fixing nail 30 is connected in the second fixing hole 21 at a part of the fixing nail 30, and another part of the fixing nail 30 is penetrated out of the second fixing hole 21. Thus, the filling block 20 can be filled into the cavity-shaped bone defect part 1, so that the bone defect part of a patient becomes more complete, and the filling block can be inserted into the operation hole 11 through an implantation tool for implanting an acetabular prosthesis and fixing the acetabular cup matrix 10 and the filling block 20 together at the cavity-shaped bone defect part 1 through the fixing nails 30, so that the acetabular cup matrix 10 can be attached to an acetabulum, loosening of the acetabular prosthesis is avoided, the initial stability of fixing is effectively improved, and the fixing effect is improved. Therefore, the technical scheme of the first embodiment effectively solves the problem of poor fixation effect of the acetabular prosthesis in the related technology.

Specifically, the operating hole is a socket-head cap hole, and the implantation tool is a socket-head cap wrench, which can be inserted into the socket-head cap hole for implanting the acetabular prosthesis. The acetabular cup base body 10 is also provided with the connecting holes, so that the acetabular cup base body 10 is fixed at the acetabulum through the connecting holes by screws, and the stability of the fixed acetabular prosthesis is improved.

In the first embodiment, the number of the first fixing holes may be one or more, and the corresponding second fixing holes are also provided with corresponding numbers so as to match the fixing nails to pass through the first fixing holes and the second fixing holes.

As shown in fig. 1-8, to maximize the similarity of the shape of the filler piece 20 to the shape of the lacunar bone defect, the shape of the filler piece 20 is at least 1/4 of the spherical shell. In this way, the design can be made according to the shape of the patient's bone defect.

In the first embodiment, the shape of the filler piece 20 is preferably a 1/4 part of the spherical shell.

Of course, in clinical application, the fixation nail 30 can be implanted into the area to be extended and fixed according to the bone condition of the patient, so as to strengthen the fixation effect of the acetabular prosthesis.

As shown in fig. 1 to 8, the packing block 20 has a first outer end edge 22 and a second outer end edge 23 which are disposed opposite to each other in the outer circumferential direction of the acetabular cup body 10, the first outer end edge 22 protruding from the outer surface of the acetabular cup body 10 in the radial direction of the acetabular cup body 10, and the second outer end edge 23 being disposed in common with the side edges of the inner surface of the packing block 20. In this way, the filler piece 20 is able to better fill the lacunar bone defect 1, so that the bone defect of the patient becomes more complete. Meanwhile, as the second outer end edge 23 and the side edge of the inner surface of the filling block 20 are arranged in a sharing way, the acetabular cup can be better attached to the outer surface of the matrix 10, and stress concentration between the second outer end edge 23 and the outer surface of the acetabular cup matrix 10 is effectively reduced.

As shown in fig. 1 to 8, the operation hole is located at the center of the acetabular cup body 10, the first fixing hole 12 is located at the outer side of the operation hole 11 in the circumferential direction, and in order to prevent the fixing nail 30 from being separated from the first fixing hole 12, a separation preventing plug 40 is provided in the first fixing hole 12, the separation preventing plug 40 is press-fitted with the end surface of the fixing nail 30, so that the separation preventing plug 40 can block the first fixing hole 12 to prevent the fixing nail 30 from being separated from the first fixing hole 12.

As shown in fig. 1 to 8, in order that the fixing pin 30 can be reliably fixed in the first fixing hole 12, the anti-drop plug 40 is a circular truncated cone, and the first fixing hole 12 is a tapered hole in interference fit with the circular truncated cone.

Of course, in the anti-slip plug of the second embodiment of the acetabular prosthesis shown in fig. 9, the difference from the staple of the first embodiment of the anti-slip plug is the structure of the anti-slip plug. In the second embodiment, as shown in fig. 1 and 9, in order that the fixing pin 30 can be reliably fixed in the first fixing hole 12, the external surface of the anti-drop plug 40 is provided with external threads, and the first fixing hole 12 is provided with internal threads connected with the external threads.

As shown in fig. 1 to 8, in order to enhance the effect of initial stability and long term stability of screwing the fixing pin 30 into the acetabulum, the profile of the screw thread of the fixing pin 30 includes a triangle shape. In this way, the structural strength of the filling block 20 is higher, so that the fracture resistance of the joint of the acetabular cup matrix 10 and the filling block 20 is higher than that of other parts of the acetabular cup matrix 10, the filling block 20 is reliably fixed at the gap-filling bone defect part 1 through the fixing nails 30, and the whole acetabular prosthesis bears the greatest concentrated stress at the fixing nails 30, so that the stress condition of other parts of the acetabular cup matrix 10 is improved, and the mechanical conduction is improved.

Of course, in the staple of the third embodiment of the acetabular prosthesis shown in fig. 10, the difference from the staple of the first embodiment of the acetabular prosthesis is the profile of the threads of the staple, and in the third embodiment the profile of the threads of the staple 30 comprises a saw tooth shape.

As shown in fig. 2-5, to better accommodate the shape of the patient's bone defect, the filler piece 20 is positionally adjustable on the outer surface of the acetabular cup body 10 so that even if a complex patient's bone defect shape is encountered, the filler piece 20 position on the outer surface of the acetabular cup body 10 can be adjusted to accommodate the filling requirements.

As shown in fig. 2 to 5, in order to facilitate adjustment of the position of the packing element 20 on the outer surface of the acetabular cup body 10, the acetabular cup body 10 is further provided with a through hole 14, the packing element 20 is further provided with a plurality of screw holes 24 cooperating with the through hole 14, and an adjustment member 31 is selectively coupled into one of the screw holes 24 through the through hole 14 to adjust the position of the packing element 20 on the outer surface of the acetabular cup body 10. The adjustment member 31 of the first embodiment is preferably a screw.

As shown in fig. 2-5, a countersink 15 is provided on the inner surface of the acetabular cup body 10 on the outer surface of the acetabular cup body 10. The countersunk slot 15 is able to receive the screw head of a screw, avoiding interference with the screw head when the femoral head of the femoral prosthesis is installed in the acetabular cup base 10. In order to fill the bone defect of the patient in a wide range of the filling block 20, the number of through holes 14 is plural and the number of through holes 14 is smaller than the number of screw holes 24, and the adjusting member 31 is selectively inserted through one through hole 14 and is selectively coupled to one screw hole 24. In this way, the range of adjustment of the adjustment member 31 can be enlarged to facilitate filling of a wide range of patient bone defects. In the first embodiment, the aperture of the second fixing hole 21 is larger than that of the first fixing hole 12.

In the first embodiment, the plurality of screw holes 24 are sequentially arranged in the countersink at intervals along the circumferential direction, the plurality of through holes 14 include the middle through hole 14 and other through holes 14 surrounding the middle through hole 14 to form a circle, and the plurality of through holes 14 arranged in this way can not only enable the adjusting piece 31 to selectively pass through one through hole 14 and be selectively connected in one screw hole 24 under the condition that the first fixing hole 12 always corresponds to the second fixing hole 21, but also can meet the requirement that the fixing nail 30 can pass through the first fixing hole 12 and the second fixing hole 21.

As shown in fig. 1-8, the acetabular prosthesis further includes a wing 50 removably attached to the end surfaces of the acetabular cup base 10 and the filler block 20. The wings 50 are capable of engaging the patient's ilium to facilitate improved initial and distal stability of the acetabular prosthesis. And to facilitate replacement of the appropriately sized flap 50 depending on the patient's ilium shape.

Of course, in the embodiment of the anti-slip plug of the third embodiment of the acetabular prosthesis not shown in the drawings, the number of wings may be not limited to three but may be two, four or more. The acetabular prosthesis further comprises a wing plate detachably connected to the end face of the acetabular cup base body or the filling block, so that the wing plate is mounted on the end face of the acetabular cup base body or the filling block according to the ilium shape of a patient, and the adaptability is good.

As shown in fig. 1 to 8, the acetabular cup body 10 and the packing block 20 are provided with first mounting holes 13 on end surfaces thereof, and the wing plate 50 is provided with second mounting holes 52 corresponding to the first mounting holes 13, so that the mounting positions of the wing plate 50 can be selected, and the fasteners 51 pass through the first mounting holes 13 and the second mounting holes 52 to fix the wing plate 50 on the end surfaces of the acetabular cup body 10 and/or the packing block 20. Thus, the fastener 51 is matched with the first mounting hole 13 and the second mounting hole 52, the structure is simple, and the fixing effect is good.

In an embodiment not shown in the figures, first mounting holes are provided on the end faces of the acetabular cup body and the filler block, and second mounting holes corresponding to the first mounting holes are provided on the wing plates, and fasteners pass through the first and second mounting holes to fix the wing plates on the end faces of the acetabular cup body or the filler block.

As shown in fig. 1-8, in order to facilitate bone ingrowth for the patient by the configuration of the outer surface of the acetabular cup body 10 and the outer surface of the filler block 20, the outer surface of the acetabular cup body 10 and the outer surface of the filler block 20 are each provided with a porous structure 60.

Of course, in an embodiment not shown in the drawings, the above-described porous structure is also provided on the outer peripheral surface of the staple.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An acetabular prosthesis comprising:

an acetabular cup substrate (10), wherein an operation hole (11) and a first fixing hole (12) are arranged on the acetabular cup substrate (10) at intervals;

a filling block (20) arranged on the outer surface of the acetabular cup matrix (10), wherein a second fixing hole (21) communicated with the first fixing hole (12) is arranged on the filling block (20);

and a fixing nail (30), wherein one part of the fixing nail (30) is connected in the second fixing hole (21), and the other part of the fixing nail (30) penetrates through the second fixing hole (21).

2. Acetabular prosthesis according to claim 1, characterized in that the filling block (20) has a shape of at least 1/4 of a portion of a spherical shell.

3. The acetabular prosthesis according to claim 1, characterized in that the filler block (20) has a first outer end edge (22) and a second outer end edge (23) arranged opposite each other in the peripheral direction of the acetabular cup body (10), the first outer end edge (22) protruding radially of the acetabular cup body (10) from the outer surface of the acetabular cup body (10), the second outer end edge (23) being co-edged with the side edges of the inner surface of the filler block (20).

4. The acetabular prosthesis according to claim 1, wherein the operating hole is located at a central position of the acetabular cup base body (10), the first fixing hole (12) is located at a circumferential outer side of the operating hole (11), an anti-drop plug (40) is arranged in the first fixing hole (12), and the anti-drop plug (40) is in press fit with an end face of the fixing nail (30).

5. The acetabular prosthesis according to claim 4, characterized in that the anti-drop plug (40) is a truncated cone and the first fixation hole (12) is a conical hole in interference fit with the truncated cone; or, an external thread is arranged on the outer surface of the anti-drop plug (40), and an internal thread connected with the external thread is arranged in the first fixing hole (12).

6. The acetabular prosthesis according to claim 1, characterized in that the filler block (20) is adjustably positioned on an outer surface of the acetabular cup base (10).

7. The acetabular prosthesis according to claim 6, wherein the acetabular cup body (10) is further provided with a through hole (14), the filler block (20) is further provided with a plurality of screw holes (24) cooperating with the through hole (14), and an adjusting member (31) is selectively connected into one of the screw holes (24) through the through hole (14) to adjust the position of the filler block (20) on the outer surface of the acetabular cup body (10).

8. The acetabular prosthesis according to claim 7, wherein a countersink (15) is provided on an inner surface of the acetabular cup body (10), the through holes (14) being a plurality of through holes provided in the countersink (15), the number of through holes (14) being smaller than the number of screw holes (24), the adjusting member (31) being selectively inserted through one of the through holes (14) and selectively connected in one of the screw holes (24).

9. The acetabular prosthesis according to claim 1, further comprising a wing (50) removably attached to an end face of the acetabular cup base (10) and/or the filler block (20).

10. The acetabular prosthesis according to claim 9, characterized in that a first mounting hole (13) is provided on the end face of the acetabular cup base body (10) and the filler block (20), a second mounting hole (52) corresponding to the first mounting hole (13) is provided on the wing plate (50), and a fastener (51) passes through the first mounting hole (13) and the second mounting hole (52) to fix the wing plate (50) on the end face of the acetabular cup base body (10) and/or the filler block (20).

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