A modular acetabular pad file

Abstract

The present disclosure relates to a modular acetabular pad rasp. The modular acetabular pad rasp comprises a holder, an acetabular socket trial cup and an acetabular pad rasp body; wherein the acetabular pad rasp body is roughly hemispherical, and a groove adapted to the acetabular socket trial cup is provided on the acetabular pad rasp body, and the contact surface of the groove is configured as a spherical surface; the acetabular pad rasp body is provided with a limiting portion, and the acetabular socket trial cup is provided with a clamping portion, so that when the clamping portion and the limiting portion are locked, the position of the acetabular pad rasp body and the acetabular socket trial cup can be maintained; the holder is detachably connected to the acetabular pad rasp body; the outer peripheral surface of the acetabular pad rasp body comprises a first trimming area close to the spherical center thereof and a second trimming area away from the spherical center thereof, and a plurality of sharp first grinding bodies are arranged on the first trimming area, and a plurality of sharp second grinding bodies are arranged on the second trimming area. Thus, the problem that it is difficult for the acetabular pad rasp in the prior art to perform fine trimming on the acetabular socket is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of artificial joint finishing tools, and in particular to a modular acetabular pad rasp. Background Art

[0002] Acetabular spacers are surgical implants that replace the acetabulum of the human hip joint. They are mainly used in hip replacement surgery for cases with acetabulum defects to achieve the purpose of rebuilding the initial stability of the cup. When performing hip replacement surgery on patients who need to use acetabular spacers, special acetabular spacer files are required for the operation.

[0003] However, in the prior art, there are only acetabular rasps for filing the acetabular fossa, and there are no special trimming instruments for the acetabular defect. During the operation, only tools such as rongeurs can be used to trim the defect. However, due to the limited application range and function of rongeurs, they cannot perform fine trimming of the acetabular pad. Therefore, after the acetabular pad is implanted, the acetabular pad has a low degree of matching with the acetabular bone, and the pad cannot be in close contact with the acetabular bone, making it difficult to achieve good initial stability, which affects the later bone ingrowth effect.

[0004] It can be seen that the above-mentioned existing acetabular rasp still has defects in structural design and needs to be further improved. How to develop an acetabular pad rasp that can finely trim the acetabular defect of the patient and match it well is one of the important research topics in this field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a modular acetabular pad rasp to solve the problem that the acetabular rasp in the prior art is difficult to perform fine trimming on the acetabular fossa.

[0006] In order to achieve the above-mentioned object, the present disclosure provides a modular acetabular pad rasp, the rasp comprising a holder, an acetabular socket trial cup and an acetabular pad rasp body made of a metal alloy material;

[0007] The acetabular pad file body is roughly hemispherical, and is provided with a groove adapted to the acetabular socket trial cup, and the contact surface of the groove is configured as a spherical surface;

[0008] The acetabular pad file body is provided with a limiting portion, and the acetabular socket trial cup is provided with a clamping portion adapted to the limiting portion, so that when the clamping portion is locked with the limiting portion, the position of the acetabular pad file body and the acetabular socket trial cup can be maintained;

[0009] The holder is configured as a rod-shaped structure having a basic length and is detachably connected to the acetabular pad rasp body;

[0010] The outer peripheral surface of the acetabular pad rasp body includes a first trimming area close to the ball center and a second trimming area away from the ball center, wherein the first trimming area is provided with a plurality of sharp first grinding bodies, and the second trimming area is provided with a plurality of sharp second grinding bodies.

[0011] In a possible design, the sizes of the first grinding body and the second grinding body are gradually reduced in the direction away from the outer peripheral surface of the acetabular pad rasp body; the first grinding body and the second grinding body are both configured as triangular pyramid structures.

[0012] In a possible design, the top of the first grinding body is a plane.

[0013] In a possible design, the volume of the first grinding body is greater than the volume of the second grinding body;

[0014] The arrangement density of the first grinding bodies is greater than the arrangement density of the second grinding bodies.

[0015] In a possible design, the holder includes a vertical pole, a handle rod and a locking screw, one end of the vertical pole is connected to the handle rod, and the other end is provided with a plug hole, the axis of the plug hole is parallel to the axis of the vertical pole; the locking rod is movably connected to the vertical pole, and the moving direction of the locking rod is perpendicular to the axis of the vertical pole;

[0016] The acetabular pad rasp body is provided with a positioning shaft matched with the plug hole, and the vertical rod is plugged into the positioning shaft so as to maintain the position of the vertical rod relative to the acetabular pad rasp body by tightening the locking rod.

[0017] In a possible design, the limiting portion is configured as a positioning slot, the clamping portion is configured as a positioning buckle matched with the positioning slot, and the positioning buckle is detachably clamped in the positioning slot.

[0018] In a possible design, the positioning buckle is T-shaped, including a connecting section and a snap-fit ​​section, one end of the connecting section is connected to the snap-fit ​​section, and the other end is connected to the acetabular socket trial cup, wherein the edge contour of the snap-fit ​​section is arc-shaped.

[0019] In a possible design, a positioning hole is provided on the acetabular trial cup.

[0020] In a possible design, a weight-reducing hole is provided on the acetabular socket trial cup.

[0021] In a possible design, the weight-reducing holes are in the shape of long strips, and are configured in at least two groups and are evenly distributed around the circumference of the acetabulum trial cup.

[0022] In a possible design, an annular groove is provided on the outer periphery of the acetabular socket trial cup, and the annular groove is close to the edge of the acetabular socket trial cup.

[0023] Through the above technical solution, since the acetabular pad file body is made of metal alloy material, it has good striking performance and corrosion resistance, and is light and easy to use. The outer surface of the acetabular pad file body is evenly distributed with sharp flanges, which can trim the host's bone acetabular defect to an ideal state under external forces, which is convenient for prosthesis implantation. The groove is designed as a spherical surface, which is convenient for good contact with the acetabular fossa trial cup, which is beneficial to promote stability during combination and is convenient for the operator to perform striking actions.

[0024] The set of matching acetabular pad files can file the acetabular fossa, thereby finely trimming the acetabular defect, so that after the acetabular pad is implanted, the acetabular pad can have a good match with the acetabular bone, and then the pad and the acetabular bone are in close contact, achieving good initial stability and ensuring the later bone ingrowth effect. At the same time, the set of matching acetabular pad files has a simple structure and is easy to disassemble and operate.

[0025] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of a modular acetabular pad file in a certain viewing angle;

[0028] Figure 2 It is a three-dimensional structural schematic diagram of the modular acetabular spacer file in another viewing angle;

[0029] Figure 3 It is a schematic diagram of the three-dimensional structure of a holder in a modular acetabular pad rasp in one embodiment;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of an acetabular socket trial cup in a modular acetabular pad rasp in one embodiment;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the acetabular spacer file body in the modular acetabular spacer file at a certain viewing angle;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the acetabular pad rasp main body in the modular acetabular pad rasp at another viewing angle.

[0033] Description of Reference Numerals

[0034] 1-holder, 11-vertical pole, 12-handle bar, 13-locking screw, 2-acetabular socket test cup, 21-positioning buckle, 211-connecting section, 212-clamping section, 22-annular groove, 23-positioning hole, 24-weight reduction hole, 3-acetabular pad file body, 301-first trimming area, 302-second trimming area, 303-positioning slot, 304-groove, 41-first grinding body, 42-second grinding body, 5-positioning axis. DETAILED DESCRIPTION

[0035] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0036] According to a specific embodiment of the present disclosure, a modular acetabular pad rasp is provided, which can file the acetabular fossa, thereby finely trimming the acetabular defect. Therefore, after the acetabular pad is implanted, the acetabular pad and the acetabular bone have a good match, and then the pad and the acetabular bone are in close contact, achieving good initial stability to ensure the later bone ingrowth effect.

[0037] See also Figures 1 to 6 As shown, the modular acetabular pad file includes a holder 1, an acetabular socket trial cup 2 and an acetabular pad file body 3 made of a metal alloy material; wherein the acetabular pad file body 3 is roughly hemispherical, and the acetabular pad file body 3 is provided with a groove 304 adapted to the acetabular socket trial cup 2, and the contact surface of the groove 304 is configured as a spherical surface.

[0038] The acetabular pad rasp body 3 is provided with a limiting portion, and the acetabular socket trial cup 2 is provided with a clamping portion adapted to the limiting portion, so that when the clamping portion and the limiting portion are locked, the positions of the acetabular pad rasp body 3 and the acetabular socket trial cup 2 can be maintained; the holder 1 is configured as a rod-shaped structure with a basic length, and is detachably connected to the acetabular pad rasp body 3.

[0039] The outer peripheral surface of the acetabular pad rasp body 3 includes a first trimming area 301 close to the center of the sphere and a second trimming area 302 away from the center of the sphere, wherein the first trimming area 301 is provided with a plurality of sharp first grinding bodies 41, and the second trimming area 302 is provided with a plurality of sharp second grinding bodies 42.

[0040] Since the acetabular pad file body 3 is made of metal alloy material, it has good striking performance and corrosion resistance, and is light in weight and easy to use. The outer surface of the acetabular pad file body 3 is uniformly distributed with sharp bosses (i.e., the first grinding body 41 and the second grinding body 42), which can trim the host's bone acetabular defect to an ideal state under external forces, which is convenient for prosthesis implantation. The groove 304 is designed as a spherical surface, which is convenient for good contact with the acetabular fossa trial cup 2, which is beneficial to promote stability during combination and is convenient for the operator to perform striking actions.

[0041] Through the above technical solution, the set of acetabular pad files can file the acetabular fossa, thereby finely trimming the acetabular defect, so that after the acetabular pad is implanted, the acetabular pad can have a good match with the acetabular bone, and then the pad is in close contact with the acetabular bone, achieving good initial stability and ensuring the later bone ingrowth effect. At the same time, the set of acetabular pad files has a simple structure and is easy to disassemble and operate.

[0042] In one embodiment provided in the present disclosure, refer to Figure 5 and Figure 6 As shown, the sizes of the first grinding body 41 and the second grinding body 42 gradually decrease in the direction away from the outer peripheral surface of the acetabular pad file body 3. The first grinding body 41 and the second grinding body 42 are both configured as triangular pyramid structures, which are convenient for trimming the defective part of the acetabulum to an ideal state, which is beneficial to the implantation of the prosthesis.

[0043] As an option, the top of the first grinding body 41 is a plane. In this way, multiple edges and corners can be formed, which is beneficial for finely trimming the acetabular defect, so that the acetabular pad and the acetabular bone have a good match, and then the pad and the acetabular bone are in close contact, achieving good initial stability and ensuring the later bone ingrowth effect.

[0044] In the present disclosure, the volume of the first grinding body 41 is greater than that of the second grinding body 42, so as to effectively file the acetabulum; the layout density of the first grinding body 41 is greater than that of the second grinding body 42, which is beneficial to improving the grinding effect on the acetabulum.

[0045] In one embodiment provided in the present disclosure, refer to Figures 1 to 3 As shown, the holder 1 includes a vertical pole 11, a handle bar 12 and a locking screw 13. One end of the vertical pole 11 is connected to the handle bar 12, and the other end is provided with a plug hole, and the axis of the plug hole is parallel to the axis of the vertical pole 11; the locking rod is movably connected to the vertical pole 11, and the moving direction of the locking rod is perpendicular to the axis of the vertical pole 11.

[0046] The acetabular pad file body 3 is provided with a positioning shaft 5 adapted to the plug hole, and the vertical rod 11 is plugged into the positioning shaft 5, so that the vertical rod 11 is kept in position relative to the acetabular pad file body 3 by tightening the locking rod, so that the acetabular fossa can be filed with the handle 12. In addition, the arrangement of the vertical rod 11 and the handle 12 is conducive to forming a force arm of a certain length, so that the acetabular fossa can be filed with the acetabular pad file body 3 using a smaller force.

[0047] In an embodiment provided in the present disclosure, the limiting portion is configured as a positioning slot 303, and the clamping portion is configured as a positioning buckle 21 adapted to the positioning slot 303. The positioning buckle 21 is detachably clamped in the positioning slot 303, so that it is convenient to disassemble and assemble according to usage requirements, and is convenient for maintenance and replacement, and has good flexibility and practicality.

[0048] Specifically, the positioning buckle 21 is T-shaped, including a connecting section 211 and a clamping section 212, one end of the connecting section 211 is connected to the clamping section 212, and the other end is connected to the acetabular cup 2, wherein the edge profile of the clamping section 212 is arc-shaped. Through such a structural design, the degree of freedom between the positioning buckle 21 and the positioning slot 303 is limited to only one, that is, the positioning buckle 21 can only move along the depth direction of the slot body of the positioning slot 303. When filing the acetabular part, because the force applied by the operator is a lateral or oblique force, it will not only not affect the cooperation between the positioning buckle 21 and the positioning slot 303, but also help to drive the acetabular pad file body 3 to move reliably.

[0049] In this way, when the positioning buckle 21 is assembled with the positioning slot 303, the positioning buckle 21 can be embedded into the positioning slot 303 from the height direction, thereby limiting the position of the positioning buckle 21, and further achieving locking between the acetabular socket trial cup 2 and the acetabular pad file body 3.

[0050] In other embodiments, the limiting portion may be configured as a boss, and the snap-fit ​​portion may be configured as a snap-fit ​​groove, that is, the positions of the positioning groove and the positioning buckle may be interchanged. For this, those skilled in the art may flexibly replace them according to actual needs.

[0051] In an embodiment provided in the present disclosure, a positioning hole 23 is provided on the acetabular socket trial cup 2, and the positioning hole 23 can be used as a temporary positioning to facilitate subsequent operations.

[0052] Specifically, in the present disclosure, three positioning holes 23 are provided, which is beneficial to improving stability through three-point positioning, and can also indirectly reduce weight. Furthermore, the positions of the positioning holes 23 are provided in an isosceles triangle.

[0053] In an embodiment provided by the present disclosure, a weight-reducing hole 24 is provided on the acetabular socket trial cup 2, so as to reduce the weight of the acetabular socket trial cup 2 and reduce the labor intensity of the operator during the operation.

[0054] In an embodiment provided by the present disclosure, the weight-reducing holes 24 are in the shape of long strips, and are configured in at least two groups and are evenly distributed around the circumference of the acetabular socket trial cup 2. In this way, the weight of the acetabular socket trial cup 2 can be reduced to the maximum extent without affecting the structural strength of the acetabular socket trial cup 2, thereby facilitating the operation of the operator.

[0055] Of course, the shape of the weight-reducing hole can also be configured into any suitable shape such as a five-pointed star, square, circle or ellipse, and technicians in this field can flexibly configure it according to actual needs.

[0056] See also Figure 4 As shown, an annular groove 22 is provided on the outer periphery of the acetabular socket trial cup 2, and the annular groove 22 is close to the edge of the acetabular socket trial cup 2, so that the contact area between the acetabular socket trial cup 2 and the spherical surface of the acetabular pad file body 3 can be appropriately reduced.

[0057] Example 1

[0058] In the present embodiment, the modular acetabular pad file includes a holder 1, an acetabular socket trial cup 2 and an acetabular pad file body 3 made of a metal alloy material; wherein, the acetabular pad file body 3 is roughly hemispherical, and the acetabular pad file body 3 is provided with a groove 304 adapted to the acetabular socket trial cup 2, and the contact surface of the groove 304 is configured as a spherical surface.

[0059] The acetabular pad rasp body 3 is provided with a limiting portion, and the acetabular socket trial cup 2 is provided with a clamping portion adapted to the limiting portion, so that when the clamping portion and the limiting portion are locked, the positions of the acetabular pad rasp body 3 and the acetabular socket trial cup 2 can be maintained; the holder 1 is configured as a rod-shaped structure with a basic length, and is detachably connected to the acetabular pad rasp body 3.

[0060] The outer peripheral surface of the acetabular pad file body 3 includes a first trimming area 301 close to the ball center thereof and a second trimming area 302 away from the ball center thereof, wherein a plurality of sharp first grinding bodies 41 are arranged on the first trimming area 301, and a plurality of sharp second grinding bodies 42 are arranged on the second trimming area 302. The sizes of the first grinding bodies 41 and the second grinding bodies 42 are gradually reduced in the direction away from the outer peripheral surface of the acetabular pad file body 3. The first grinding bodies 41 and the second grinding bodies 42 are both configured as triangular pyramid structures.

[0061] Example 2

[0062] In this embodiment, based on the embodiment 1, the structure of the first grinding body 41 is partially improved, and the top of the first grinding body 41 is cut to make the top of the first grinding body 41 a plane. In this way, multiple edges and corners can be formed, which is beneficial for finely trimming the acetabular defect, so that the acetabular pad and the acetabular bone have a good match, and then the pad and the acetabular bone are in close contact, achieving good initial stability and ensuring the later bone ingrowth effect.

[0063] Example 3

[0064] In this embodiment, based on Embodiment 1, the volume of the first grinding body 41 is greater than that of the second grinding body 42, so that the acetabulum is effectively filed; the layout density of the first grinding body 41 is greater than that of the second grinding body 42, which is beneficial to improving the grinding effect on the acetabulum.

[0065] Example 4

[0066] In this embodiment, based on Embodiment 1, the holder 1 includes a vertical pole 11, a handle rod 12 and a locking screw 13. One end of the vertical pole 11 is connected to the handle rod 12, and the other end is provided with a plug hole, and the axis of the plug hole is parallel to the axis of the vertical pole 11; the locking rod is movably connected to the vertical pole 11, and the moving direction of the locking rod is perpendicular to the axis of the vertical pole 11.

[0067] A positioning shaft 5 matching the plug hole is provided on the acetabular pad file body 3, and the vertical rod 11 is plugged into the positioning shaft 5, so that the vertical rod 11 is kept in position relative to the acetabular pad file body 3 by tightening the locking rod, so that the acetabular fossa can be filed with the handle 12. In addition, the arrangement of the vertical rod 11 and the handle 12 is conducive to forming a force arm of a certain length, so that the acetabular fossa can be ground with a smaller force through the acetabular pad file body 3.

[0068] Example 5

[0069] In this embodiment, based on Embodiment 1, the limiting portion is configured as a positioning slot 303, and the acetabular socket trial cup 2 is provided with a positioning buckle 21 that is compatible with the positioning slot 303. The positioning buckle 21 is detachably mounted in the positioning slot 303, so that it is convenient for disassembly and assembly according to usage requirements, and is convenient for maintenance and replacement, and has good flexibility and practicality.

[0070] Specifically, the positioning buckle 21 is T-shaped, including a connecting section 211 and a clamping section 212, one end of the clamping section is connected to the clamping section 212, and the other end is connected to the acetabular cup 2, wherein the edge profile of the clamping section 212 is arc-shaped. Through such a structural design, the degree of freedom between the positioning buckle 21 and the positioning slot 303 is limited to only one, that is, the positioning buckle 21 can only move along the depth direction of the slot body of the positioning slot 303. When filing the acetabular part, because the force applied by the operator is a lateral or oblique force, it will not affect the cooperation between the positioning buckle 21 and the positioning slot 303, and it is also beneficial to drive the acetabular pad file body 3 to move reliably.

[0071] In this way, when the positioning buckle 21 is assembled with the positioning slot 303, the positioning buckle 21 can be embedded into the positioning slot 303 from the height direction, thereby limiting the position of the positioning buckle 21, and further achieving locking between the acetabular socket trial cup 2 and the acetabular pad file body 3.

[0072] Example 6

[0073] In this embodiment, on the basis of embodiment 1, a positioning hole 23 is provided on the acetabular socket trial cup 2, and the positioning hole 23 can be used as a temporary positioning, so as to facilitate subsequent operations. Specifically, three positioning holes 23 are provided, which is beneficial to improve stability through three-point positioning on the one hand, and can also indirectly play a certain role in weight reduction on the other hand. Furthermore, the position of the positioning hole 23 is provided as an isosceles triangle.

[0074] Example 7

[0075] In this embodiment, on the basis of embodiment 1, a weight-reducing hole 24 is provided on the acetabular socket trial cup 2, thereby reducing the weight of the acetabular socket trial cup 2 and reducing the labor intensity of the operator during the operation. Specifically, the weight-reducing holes 24 are in the shape of a long strip, and are configured in at least two groups, and are evenly distributed around the circumference of the acetabular socket trial cup 2. In this way, the weight of the acetabular socket trial cup 2 can be reduced to the maximum extent without affecting the structural strength of the acetabular socket trial cup 2, thereby facilitating the operation of the operator.

[0076] The beneficial effects of the present invention are:

[0077] The modular acetabular pad file provided by the above scheme has the characteristics of flexible and convenient use, fine trimming of acetabular defects, and high matching degree of acetabular pads, etc. Therefore, it makes up for the problem that the existing acetabular rasps can only use tools such as bone rongeurs to trim the defect during surgery, resulting in a low matching degree between the acetabular pad and the acetabular bone after implantation, and the pad cannot be well in close contact with the acetabular bone.

[0078] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

Claims

1. A modular acetabular pad file, characterized in that: The file comprises a holder (1), an acetabular socket trial cup (2), and an acetabular pad file body (3) made of a metal alloy material; The acetabular pad file body (3) is hemispherical, and a groove (304) adapted to the acetabular socket trial cup (2) is provided on the acetabular pad file body (3), and a contact surface of the groove (304) is configured as a spherical surface; The acetabular pad rasp body (3) is provided with a limiting portion, and the acetabular socket trial cup (2) is provided with a clamping portion adapted to the limiting portion, so that when the clamping portion is locked with the limiting portion, the position of the acetabular pad rasp body (3) and the acetabular socket trial cup (2) can be maintained; The holder (1) is configured as a rod-shaped structure with a basic length and is detachably connected to the acetabular pad rasp body (3); The outer peripheral surface of the acetabulum pad rasp body (3) comprises a first trimming area (301) close to the ball center thereof and a second trimming area (302) far from the ball center thereof, wherein the first trimming area (301) is provided with a plurality of sharp first grinding bodies (41), and the second trimming area (302) is provided with a plurality of sharp second grinding bodies (42); The sizes of the first grinding body (41) and the second grinding body (42) are gradually reduced in a direction away from the outer peripheral surface of the acetabulum pad rasp body (3); the first grinding body (41) and the second grinding body (42) are both configured as triangular pyramid structures; The arrangement density of the first grinding bodies (41) is greater than the arrangement density of the second grinding bodies (42).

2. The modular acetabular pad rasp according to claim 1, characterized in that: The top of the first grinding body (41) is a plane.

3. The modular acetabular pad rasp according to claim 1, characterized in that: The volume of the first grinding body (41) is greater than the volume of the second grinding body (42).

4. The modular acetabular spacer rasp according to claim 1, characterized in that: The holder (1) comprises a vertical pole (11), a handle bar (12) and a locking screw (13); one end of the vertical pole (11) is connected to the handle bar (12), and the other end is provided with a plug hole, the axis of the plug hole is parallel to the axis of the vertical pole (11); the locking screw is movably connected to the vertical pole (11), and the moving direction of the locking screw is perpendicular to the axis of the vertical pole (11); The acetabular pad rasp body (3) is provided with a positioning shaft (5) adapted to the insertion hole, and the vertical rod (11) is inserted into the positioning shaft (5) so that the position of the vertical rod (11) relative to the acetabular pad rasp body (3) is maintained by tightening the locking screw.

5. The modular acetabular spacer rasp according to claim 1, characterized in that: The limiting portion is configured as a positioning slot (303), the engaging portion is configured as a positioning buckle (21) adapted to the positioning slot (303), and the positioning buckle (21) is detachably engaged in the positioning slot (303).

6. The modular acetabular spacer rasp according to claim 5, characterized in that: The positioning buckle (21) is T-shaped, comprising a connecting section (211) and a clamping section (212), one end of the connecting section (211) is connected to the clamping section (212), and the other end is connected to the acetabulum trial cup (2), wherein the edge profile of the clamping section (212) is arc-shaped.

7. The modular acetabular spacer rasp according to claim 1, characterized in that: The acetabulum trial cup (2) is provided with a positioning hole (23).

8. The modular acetabular spacer rasp according to claim 1, characterized in that: The acetabular socket trial cup (2) is provided with weight-reducing holes (24); the weight-reducing holes (24) are in the shape of long strips, are arranged in at least two groups, and are evenly distributed in the circumferential direction of the acetabular socket trial cup (2).

9. The modular acetabular spacer rasp according to claim 8, characterized in that: An annular groove (22) is provided on the outer periphery of the acetabular socket trial cup (2), and the annular groove (22) is close to the edge of the acetabular socket trial cup (2).

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