Lining extractor of acetabular cup, acetabular cup and acetabular cup suite

Abstract

The utility model discloses an acetabular cup lining extractor, an acetabular cup and an acetabular cup suite, the outer surface of the acetabular cup comprises a first end face, the acetabular cup is further provided with a mounting cavity and a guide hole, an opening of the mounting cavity is located in the first end face and used for mounting a lining, and an opening of the guide hole is located in the first end face; the lining extractor comprises an abutting face and a wire part, and the abutting face is used for abutting against the first end face to apply knocking acting force to the acetabular cup; the guiding part is arranged on the abutting surface in a protruding mode and used for being inserted into the guiding hole so as to guide the abutting surface to abut against the first end face. According to the lining extractor, the guide part of the lining extractor is in guide fit with the guide hole of the acetabular cup, so that the abutting surface of the lining extractor can be more accurately abutted to the first end surface (namely the to-be-knocked part) of the acetabular cup, and the technical problem that the lining extractor is difficult to align to the to-be-knocked part on the acetabular component is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and in particular, relates to an acetabular cup liner remover, an acetabular cup, and an acetabular cup kit. Background Art

[0002] The acetabular component is an orthopedic prosthesis used to replace the patient's damaged hip joint, which mainly includes an acetabular cup and a liner. The acetabular cup is used to connect and fix with the patient's hip bone, and the liner is used to be installed in the acetabular cup and connected with the patient's femur.

[0003] In the related art, the liner needs to be installed after the acetabular cup is fixed to the hip bone in the patient's body. If the liner is not installed properly, it is necessary to use a liner extractor to knock the acetabular component to make the liner separate from the acetabular cup, and then reinstall the liner. However, in the actual operation, it is difficult for the liner extractor to align the part to be knocked on the acetabular component.

[0004] Therefore, the prior art needs to be improved and enhanced. Utility Model Content

[0005] The embodiments of the present application provide an acetabular cup liner remover, an acetabular cup, and an acetabular cup kit, which can improve the technical problem that the liner remover is difficult to align with the part to be tapped on the acetabular component.

[0006] In a first aspect, an embodiment of the present application provides a liner extractor for an acetabular cup, wherein the outer surface of the acetabular cup includes a first end surface, and the acetabular cup is further provided with a mounting cavity and a guide hole, wherein the opening of the mounting cavity is located at the first end surface and is used for mounting the liner, and the opening of the guide hole is located at the first end surface; the liner extractor comprises:

[0007] an abutment surface, the abutment surface being used to abut against the first end surface to apply a knocking force to the acetabular cup; and

[0008] A guide portion is protruding from the abutting surface, and is used to be inserted into the guide hole to guide the abutting surface to abut against the first end surface.

[0009] Optionally, the outer surface of the guide portion is a part of a spherical surface or an ellipsoidal surface.

[0010] Optionally, the outer surface of the guide portion is a hemispherical surface, and the radius of the guide portion is 0.7 mm to 0.8 mm.

[0011] Optionally, the distance between the edge of the abutting surface and the guide portion is 0.3 mm to 0.45 mm.

[0012] Optionally, the liner extractor comprises:

[0013] A first portion, the first portion being formed with the abutment surface and the guide portion; and

[0014] The second part is installed on a side of the first part away from the abutting surface, and the second part is used to receive the knocking of an external instrument so as to apply the knocking force to the acetabular cup through the abutting surface of the first part.

[0015] Optionally, the second part includes a second rod body, the first part includes a first rod body, the first rod body is mounted on one end of the second rod body, and the abutting surface and the guide portion are formed on one end of the first rod body away from the second rod body;

[0016] Wherein, the cross-sectional area of ​​the first rod body is smaller than the cross-sectional area of ​​the second rod body, and the length of the first rod body is 10 cm to 15 cm.

[0017] Optionally, one end of the first rod body away from the second rod body is tapered, so that the cross-sectional area of ​​the end of the first rod body away from the second rod body is smaller than the cross-sectional area of ​​the middle part of the first rod body;

[0018] The abutting surface is an end surface of the first part which is away from the second part.

[0019] Optionally, the first rod body is an integrally formed structure; and / or

[0020] The Rockwell hardness of the first rod body is greater than 53.

[0021] Optionally, the first part and the second part are detachably connected or fixed by welding.

[0022] Optionally, the second part includes a striking portion, the striking portion is located on a side of the second part away from the first part, and the striking portion is used to receive striking by an external instrument so as to apply the striking force to the acetabular cup through the first part; wherein,

[0023] The end surface of the striking portion facing away from the first portion is a convex surface; and / or

[0024] The striking portion comprises a second end surface facing away from the first portion and a first annular wall arranged around the second end surface, wherein at least one side of the first annular wall in the circumferential direction is a plane;

[0025] The second part further includes a second rod body, one end of the second rod body is connected to the knocking part, and the other end is connected to the first part, and the peripheral edge of the knocking part protrudes from the outer peripheral side of the second rod body.

[0026] Optionally, the outer diameter of the guide portion is less than or equal to the inner diameter of the guide hole.

[0027] In the second aspect, an embodiment of the present application also provides a liner remover for an acetabular cup, comprising a striking end and an abutting end arranged opposite to each other along the length direction, wherein the striking end is used to receive the striking of an external instrument, and the abutting end comprises an abutting surface and a guide portion, wherein the abutting surface is located on the side of the abutting end away from the striking end, and the guide portion is protruding from the side of the abutting surface away from the striking end.

[0028] Optionally, the outer surface of the guide portion is a hemispherical surface, and the radius of the guide portion is 0.7 mm to 0.8 mm; and / or

[0029] The distance between the edge of the abutting surface and the guide portion is 0.3 mm to 0.45 mm.

[0030] In a third aspect, an embodiment of the present application further provides an acetabular cup, wherein the outer surface of the acetabular cup includes a first end face, and the acetabular cup is further provided with a mounting cavity and a guide hole, wherein the opening of the mounting cavity is located at the first end face and is used for mounting a liner, and the opening of the guide hole is located at the first end face, and the guide hole is used for inserting a liner remover to guide the liner remover to abut against the first end face.

[0031] In a fourth aspect, the present application also provides an acetabular cup kit, comprising any one of the above-mentioned liner removers and / or acetabular cups.

[0032] In the embodiment of the present application, by means of the guiding cooperation between the guiding portion of the liner extractor and the guiding hole of the acetabular cup, the abutting surface of the liner extractor can be more accurately abutted against the first end surface of the acetabular cup (i.e., the part to be tapped), thereby improving the technical problem that the liner extractor is difficult to align with the part to be tapped on the acetabular component. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The technical solution and beneficial effects of the present application will be made apparent by describing in detail the specific implementation modes of the present application in conjunction with the accompanying drawings.

[0034] Figure 1 A schematic diagram of the structure of the acetabular cup provided in an embodiment of the present application.

[0035] Figure 2 A cross-sectional view of the liner remover provided in an embodiment of the present application in abutment with the acetabular cup.

[0036] Figure 3 for Figure 2 A partial enlarged view of the X in FIG.

[0037] Figure 4 for Figure 2A schematic structural diagram of the guide portion of the liner extractor is shown.

[0038] Figure 5 for Figure 2 A schematic structural diagram of the liner extractor is shown.

[0039] Figure 6 for Figure 5 A local enlarged view of point Y in the figure.

[0040] Figure 7 for Figure 2 A schematic structural diagram of the striking portion of the liner extractor is shown.

[0041] The numbers in the figure are:

[0042] 100, liner extractor; 11, first part; 111, abutment surface; 112, guide part; 114, abutment end; 12, second part; 121, second rod body; 122, striking part; 1221, second end surface; 1222, first annular wall; 123, striking end; 200, acetabular cup; 21, first end surface; 22, mounting cavity; 23, guide hole;

[0043] L1, the distance between the edge of the abutting surface and the guiding portion; L2, the length of the first rod body. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0045] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0046] It should be noted that, in the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0047] The embodiments of the present application provide an acetabular cup liner extractor, an acetabular cup, and an acetabular cup kit, which can improve the technical problem that the liner extractor is difficult to align with the part to be tapped on the acetabular component. Detailed descriptions will be given below.

[0048] Please refer to Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of the acetabular cup provided in an embodiment of the present application is shown in FIG. Figure 2 The cross-sectional view of the liner extractor provided in the embodiment of the present application in abutment with the acetabular cup. First, the embodiment of the present application provides a liner extractor 100 for an acetabular cup 200 for removing the liner of the acetabular cup 200.

[0049] The outer surface of the acetabular cup 200 includes a first end surface 21 . The acetabular cup 200 is further provided with a mounting cavity 22 and a guide hole 23 . The opening of the mounting cavity 22 is located at the first end surface 21 and is used for mounting the liner. The opening of the guide hole 23 is located at the first end surface 21 .

[0050] Please continue to refer to Figure 3 , Figure 3 for Figure 2 The X in the figure is a partial enlarged view. The liner extractor 100 includes an abutting surface 111 and a guide portion 112. The abutting surface 111 is used to abut against the first end surface 21 to apply a knocking force to the acetabular cup 200. The guide portion 112 is convexly disposed on the abutting surface 111. The guide portion 112 is used to be inserted into the guide hole 23 to guide the abutting surface 111 to abut against the first end surface 21.

[0051] Then, during the operation, the medical staff can first make an incision in the patient's body surface corresponding to the position of the hip joint, and then successively complete the removal of the necrotic part of the hip joint, fix the acetabular cup 200 to the hip joint, and install the liner to the acetabular cup 200 from the incision. At this time, the first end face 21 of the acetabular cup 200 is facing the incision. If the liner is installed in an incorrect position, the abutting surface 111 and the guide portion 112 of the medial extractor can be inserted into the patient's body through the incision, and the abutting surface 111 of the liner extractor 100 can be abutted against the first end face 21 of the acetabular cup 200 through the guiding cooperation of the guide portion 112 and the guide hole 23; finally, the end of the liner extractor 100 away from the abutting surface 111 is knocked outside the patient's body, and the knocking force can be applied to the first end face 21 through the abutting surface 111 of the liner extractor 100, and finally the liner is knocked from the acetabular cup 200 until it is loosened or even detached through the vibration generated after the acetabular cup 200 receives the knocking force.

[0052] It can be seen that the embodiment of the present application can make the abutment surface 111 of the liner extractor 100 abut against the first end surface 21 (i.e., the portion to be struck 122) of the acetabular cup 200 more accurately through the guiding cooperation between the guide portion 112 of the liner extractor 100 and the guide hole 23 of the acetabular cup 200, thereby improving the technical problem that the liner extractor 100 is difficult to align with the portion to be struck 122 on the acetabular component.

[0053] In addition, the liner installed in the acetabular cup 200 is usually a ceramic liner. Since the abutting surface 111 of the liner extractor 100 of the embodiment of the present application can more accurately abut against the first end surface 21 of the acetabular cup 200, it can be avoided that when an external instrument strikes the liner extractor 100, the liner extractor 100 abuts against the ceramic liner, thereby causing three injuries to the liner (i.e., scratches, abrasions, and bumps).

[0054] The above is an overall description of the embodiment of the present application. The following will continue to illustrate the technical solution of the embodiment of the present application with examples in combination with the shape and size parameters of the guide portion 112.

[0055] Please continue to refer to Figure 4 , Figure 4 for Figure 2 A schematic diagram of the structure of the guide portion of the liner extractor is shown. In some embodiments, the outer surface of the guide portion 112 is a part of a spherical surface or an ellipsoidal surface. Then, compared with the surface of the guide portion 112 being made into a sharp structure, on the one hand, the guide portion 112 of the embodiment of the present application is less likely to wear, and on the other hand, the guide portion 112 of the embodiment of the present application is not likely to cause irritation and damage to human tissue even if it touches human tissue during the incision of the human body. Of course, when the guide portion 112 abuts against the acetabular cup 200, it is also less likely to cause third injuries to the first end surface 21 of the acetabular cup 200.

[0056] In addition, since the guide portion 112 is guided and matched with the guide hole 23, the spherical or ellipsoidal structure can make the guide portion 112 more smoothly inserted into the guide hole 23. Especially during surgery, due to the poor visual field in the patient's body, the spherical or ellipsoidal structure can greatly reduce the difficulty of the doctor's surgery.

[0057] Taking the outer surface of the guide portion 112 as a part of a spherical surface as an example, the outer surface of the guide portion 112 is a hemispherical surface. Therefore, when the abutting surface 111 is a plane, the tangent line of the guide portion 112 at the connection with the abutting surface 111 is perpendicular to the abutting surface 111, thereby reducing the difficulty of machining the guide portion 112 by CNC or other methods.

[0058] Of course, the outer surface of the guide portion 112 can also be one-fourth, one-third, or two-thirds of the spherical surface, etc., and this embodiment of the present application is not limited to this.

[0059] In some embodiments, the radius of the guide portion 112 is greater than or equal to 0.7 mm.

[0060] Therefore, on the one hand, it can prevent the overall size of the guide part 112 from being too small and easy to wear and the guiding effect from being too poor; on the other hand, it can also prevent the overall size of the guide part 112 from being too small and difficult to process.

[0061] In some embodiments, the radius of the guide portion 112 is less than or equal to 0.8 mm.

[0062] It is understandable that the first end face 21 of the acetabular cup 200 is an annular end face arranged around the mounting cavity 22, and the acetabular cup 200 is to be placed in the human body, so the difference between the inner and outer diameters of the first end face 21 is limited by the size of the human body. Then, in order to avoid the contact between the abutting surface 111 and the human tissue or liner outside the first end face 21, the size of the abutting surface 111 is also limited. Therefore, the embodiment of the present application limits the radius of the guide portion 112 protruding from the abutting surface 111 to within 0.8 mm, which can avoid the guide portion 112 occupying too large an area of ​​the abutting surface 111, so that more areas of the abutting surface 111 can abut against the first end face 21 of the acetabular cup 200, and then the liner extractor 100 can abut against the first end face 21 of the acetabular cup 200 more stably, so as to apply a knocking force to the acetabular cup 200.

[0063] Exemplarily, the radius of the guide portion 112 can be 0.7 mm, 0.709 mm, 0.71 mm, 0.713 mm, 0.715 mm, 0.72 mm, 0.726 mm, 0.73 mm, 0.734 mm, 0.739 mm, 0.74 mm, 0.745 mm, 0.75 mm, 0.757 mm, 0.76 mm, 0.772 mm, 0.778 mm or 0.8 mm, which is not limited to the embodiments of the present application.

[0064] Optionally, taking the outer surface of the guide portion 112 as a part of the ellipsoid as an example, the outer surface of the guide portion 112 may be a semi-ellipsoid. Of course, the outer surface of the guide portion 112 may also be a quarter, a third, or two-thirds of the ellipsoid, etc., which is not limited in the present embodiment.

[0065] In some embodiments, the guide portion 112 may be loosely matched with the guide hole 23. For example, the outer diameter of the guide portion 112 is smaller than the inner diameter of the guide hole 23. Thus, after the guide portion 112 is inserted into the guide hole 23, the guide portion 112 may not contact the hole wall of the guide hole 23 or may only contact a local area. Therefore, when an external instrument strikes the liner extractor 100, the guide portion 112 may not exert a striking force on the inner wall of the guide hole 23 to avoid damage to the guide portion 112.

[0066] Optionally, the outer diameter of the guide portion 112 may also be equal to the inner diameter of the guide hole 23. Thus, after the guide portion 112 is inserted into the guide hole 23, the guide portion 112 and the hole wall of the guide hole 23 fit tightly together. Therefore, when an external instrument strikes the liner extractor 100, a striking force may be applied to the first end surface 21 through the abutment surface 111, and a striking force may be applied to the inner wall of the guide hole 23 through the guide portion 112, which is not limited in the present embodiment.

[0067] Please continue to refer to Figure 5 and Figure 6 , Figure 5 for Figure 2 The schematic diagram of the structure of the liner extractor is shown in FIG. Figure 6 for Figure 5 In some embodiments, the distance L1 between the edge of the abutting surface 111 and the guide portion 112 is greater than or equal to 0.3 mm.

[0068] It is understood that the abutting surface 111 abuts against the acetabular cup 200 through the portion located on the outer peripheral side of the guide portion 112 (i.e., the portion between the edge of the abutting surface 111 and the guide portion 112). Therefore, by limiting L1 to be greater than or equal to 0.3 mm, it is possible to prevent L1 from being too small to cause insufficient contact area between the liner extractor 100 and the acetabular cup 200, thereby allowing the liner extractor 100 to abut against the first end surface 21 of the acetabular cup 200 more stably, so as to apply a knocking force to the acetabular cup 200.

[0069] In some embodiments, a distance L1 between the edge of the abutting surface 111 and the guiding portion 112 is less than or equal to 0.45 mm.

[0070] Then, when the size of the guide portion 112 is also certain, the abutment surface 111 can be prevented from protruding to the inner peripheral side and / or outer peripheral side of the first end face 21 of the acetabular cup 200, thereby preventing the abutment surface 111 from contacting human tissue or the liner outside the first end face 21, thereby reducing or even eliminating the probability of the liner remover 100 causing damage to human tissue and / or causing triple damage to the liner.

[0071] Exemplarily, the distance L1 between the edge of the abutment surface 111 and the guide portion 112 is 0.3 mm, 0.304 mm, 0.309 mm, 0.31 mm, 0.312 mm, 0.314 mm, 0.315 mm, 0.32 mm, 0.325 mm, 0.33 mm, 0.335 mm, 0.339 mm, 0.4 mm, 0.407 mm, 0.43 mm, 0.44 mm, 0.442 mm or 0.45 mm, which is not limited to the embodiments of the present application.

[0072] like Figure 5 As shown, in some embodiments, the liner extractor 100 includes a first portion 11 and a second portion 12. The first portion 11 is formed with an abutment surface 111 and a guide portion 112. The second portion 12 is mounted on a side of the first portion 11 away from the abutment surface 111. The second portion 12 is used to receive a knock from an external instrument, so as to apply a knocking force to the acetabular cup 200 through the abutment surface 111 of the first portion 11.

[0073] Therefore, in actual production, different materials and / or processes can be used to prepare the first part 11 and the second part 12 respectively according to actual needs. For example, since the first part 11 needs to be inserted into the patient's body so that the abutment surface 111 and the guide portion 112 cooperate with the acetabular cup 200, the first part 11 can adopt a more expensive manufacturing process to improve the precision of the abutment surface 111 and the guide portion 112. Correspondingly, the second part 12 does not need to be inserted into the patient's body, so the manufacturing precision requirements of the second part 12 can be appropriately reduced to reduce the overall cost of the liner extractor 100.

[0074] Of course, in order to prevent the guide portion 112 from being worn, the first portion 11 may be made of a relatively high-cost wear-resistant material or a high-strength material, etc., which is not limited in this embodiment of the present application.

[0075] In some embodiments, the second part 12 includes a second rod 121. The first part 11 includes a first rod. The first rod is mounted on one end of the second rod 121. The end of the first rod facing away from the second rod 121 is formed with an abutting surface 111 and a guide portion 112.

[0076] It is understandable that, since the abutting surface 111 and the guide portion 112 need to be inserted into the patient's body, the rod-shaped structure of the first rod body and the second rod body 121 can make the liner extractor 100 as a whole present a slender structure. Then, during the process of inserting the first rod body into the patient's body, the first rod body and the second rod body 121 will cause less obstruction to the doctor's field of vision, so that the doctor can accurately insert the guide portion 112 into the guide hole 23, so that the abutting surface 111 of the liner extractor 100 can accurately abut against the first end surface 21 of the acetabular cup 200.

[0077] In some embodiments, the cross-sectional area of ​​the first rod is smaller than the cross-sectional area of ​​the second rod 121. Alternatively, it can be said that the outer diameter of the first rod is smaller than the outer diameter of the second rod 121, that is, the first rod is thinner. Therefore, after the first rod is inserted into the patient's body, the first rod further reduces the visual field obstruction caused by the first rod; on the other hand, the second rod 121 is relatively thick, which makes it convenient for the doctor to directly hold or clamp the second rod 121 with surgical instruments.

[0078] In some embodiments, the length L2 of the first rod is greater than or equal to 10 cm. It is understandable that in actual surgery, the depth of the incision made on the patient is usually less than 9.5 cm. Therefore, if L2 is greater than or equal to 10 cm, it can be ensured that the liner extractor 100 is inserted into the patient's body only by part of the first rod. Therefore, the liner extractor 100 only needs the first rod to be manufactured with higher precision, higher hardness or thinner than the second rod 121.

[0079] In some embodiments, the length L2 of the first rod is less than or equal to 15 cm. Therefore, when the cost of the first rod is higher, it can be avoided that the length of the first rod is too long and the overall cost of the liner extractor 100 is too high.

[0080] Exemplarily, the length L2 of the first rod is 10 cm, 10.4 cm, 10.5 cm, 11 cm, 11.5 cm, 11.79 cm, 12 cm, 12.15 cm, 12.5 cm, 13 cm, 13.07 cm, 13.5 cm, 13.78 cm, 14 cm, 14.32 cm, 14.5 cm, 14.77 cm, 14.9 cm or 15 cm, which is not limited to this embodiment of the present application.

[0081] In some embodiments, the first rod body is an integrally formed structure. Compared with the structure in which the second rod body 121 is formed in separate parts, the integrally formed structure can improve the overall strength of the first rod body, thereby improving the strength reduction problem caused by the first rod body being too slender.

[0082] Of course, in some other implementations, the first rod body may also be formed in separate parts, which is not limited in the embodiments of the present application.

[0083] In some embodiments, the Rockwell hardness of the first rod body is greater than 53, thereby improving the strength reduction problem caused by the first rod body being too slender.

[0084] For example, the first rod body may be made of stainless steel. Of course, the first rod body may also be made of other metal materials, alloy materials, or non-metal materials with a Rockwell hardness greater than 53, etc., which is not limited in the present embodiment of the application.

[0085] In some embodiments, the end of the first rod body away from the second rod body 121 is tapered so that the cross-sectional area of ​​the end of the first rod body away from the second rod body 121 is smaller than the cross-sectional area of ​​the middle portion of the first rod body.

[0086] Then, it can be simply understood that the end of the first rod body that is first inserted into the patient's body is gradually tapered. Therefore, on the one hand, the first rod body further reduces the visual field obstruction caused by the doctor; on the other hand, the end of the first rod body close to the acetabular cup 200 is less likely to contact the liner, thereby preventing the liner extractor 100 from causing damage to the liner.

[0087] Of course, in comparison, the middle portion of the first portion 11 is thicker than the end of the first rod body close to the acetabular cup 200 , which can improve the overall strength of the first rod body.

[0088] In some embodiments, the first part 11 and the second part 12 are detachably connected, so that when the first part 11, such as the guide portion 112 of the first part 11, is worn, only the first part 11 needs to be replaced with a new one, thereby reducing the replacement cost of the liner extractor 100.

[0089] For example, the first part 11 and the second part 12 may be detachably connected by means of screw connection, snap connection, plug-in connection, etc., which is not limited in the embodiments of the present application.

[0090] In some embodiments, the first part 11 and the second part 12 are fixed by welding. Therefore, compared with the detachable connection of the first part 11 and the second part 12, the welding method can prevent the doctor from causing harm to the patient and / or damage to the liner due to the failure to firmly connect the first part 11 and the second part 12 during the operation.

[0091] Of course, in some other implementations, the first part 11 and the second part 12 may also be integrally formed, which is not limited in the embodiment of the present application.

[0092] The above are some examples of the first part 11 in the embodiment of the present application. The following will continue to illustrate the second part 12 in the embodiment of the present application.

[0093] Please continue to refer to Figure 7 , Figure 7 for Figure 2 The second part 12 includes a striking part 122. The striking part 122 is located on the side of the second part 12 away from the first part 11. The striking part 122 is used to receive the striking of an external instrument to apply a striking force to the acetabular cup 200 through the first part 11.

[0094] In some embodiments, the end surface of the striking portion 122 that is away from the first portion 11 is a second end surface 1221 , and the second end surface 1221 is a convex surface.

[0095] It can be understood that, compared with the second end face 1221 being a plane, the convex surface structure can increase the contact area between the striking part 122 and the striking part 122 when an external instrument (such as a hammer) strikes the striking part 122, so as to reduce the impact force and damage to the striking part 122, thereby improving the durability of the striking part 122 and being more suitable for surgical occasions requiring precise striking.

[0096] In addition, compared with the second end face 1221 being a plane, the convex surface structure can also improve the doctor's comfort and stability when tapping, avoiding uneven force and hand fatigue.

[0097] Of course, in some other implementations, the end surface of the striking portion 122 that faces away from the first portion 11 (ie, the second end surface 1221 ) may also be a plane, which is not limited in the embodiment of the present application.

[0098] In some embodiments, the striking portion 122 includes a second end surface 1221 facing away from the first portion 11 and a first annular wall 1222 disposed around the second end surface 1221. At least one side of the first annular wall 1222 in the circumferential direction is a plane.

[0099] Therefore, compared with the cylindrical shape of the first annular wall 1222, during the placement of the liner extractor 100, the circumferential plane of the first annular wall 1222 can prevent the liner extractor 100 from rolling, so that the liner extractor 100 can be placed more stably.

[0100] For example, the cross-section of the first annular wall 1222 may be a triangle, a square, a pentagon or even a hexagon, which is not limited in the embodiment of the present application.

[0101] In some embodiments, the second part 12 further includes a second rod body 121. One end of the second rod body 121 is connected to the knocking portion 122, and the other end is connected to the first part 11. The peripheral edge of the knocking portion 122 protrudes from the outer peripheral side of the second rod body 121. Then, it can be understood that the knocking portion 122 is thicker than the second rod body 121, so that the end surface of the knocking portion 122 that is away from the second rod body 121 (i.e., the second end surface 1221) is larger, so that the doctor can knock the liner extractor 100 more conveniently.

[0102] In some embodiments, the striking portion 122 and the second rod body 121 are detachably connected, so that when the striking portion 122 is damaged, only the striking portion 122 needs to be replaced with a new one, thereby reducing the replacement cost of the liner extractor 100 .

[0103] For example, the striking portion 122 and the second rod body 121 may be detachably connected by means of threaded connection, snap connection, plug-in connection, etc., which is not limited in the embodiments of the present application.

[0104] In some embodiments, the striking portion 122 is welded to the second rod 121. Therefore, compared with the detachable connection between the striking portion 122 and the second rod 121, the welding method can prevent the doctor from causing harm to the patient and / or damage to the liner due to the failure to firmly connect the striking portion 122 and the second rod 121 during the operation.

[0105] In some embodiments, the second rod 121 may be a handle. Then, during surgery, the doctor may hold the second rod 121 with his left hand and insert the first portion 11 into the patient's body, and then the doctor may hold and swing an external instrument (such as a hammer) with his right hand to strike the striking portion 122.

[0106] Please combine Figure 3 and Figure 5 The embodiment of the present application also provides a liner extractor 100 for an acetabular cup 200, comprising a striking end 123 and an abutting end 114 arranged opposite to each other along the length direction. The striking end 123 is used to receive a strike from an external instrument. The abutting end 114 comprises an abutting surface 111 and a guide portion 112. The abutting surface 111 is located on a side of the abutting end 114 away from the striking end 123. The guide portion 112 is convexly arranged on a side of the abutting surface 111 away from the striking end 123.

[0107] In some embodiments, the specific structures of the abutting surface 111 and the guiding portion 112 may refer to the specific structures of the abutting surface 111 and the guiding portion 112 described above, respectively, and will not be described in detail in the embodiments of the present application.

[0108] In some embodiments, the liner extractor 100 may include a first part 11 and a second part 12. The specific structures of the first part 11 and the second part 12 may refer to the specific structures of the first part 11 and the second part 12 described above, respectively, and the embodiments of the present application will not be described in detail herein.

[0109] It is understandable that when the liner extractor 100 includes a first part 11 and a second part 12 , the end of the second part 12 away from the first part 11 may form a knocking end 123 , and the end of the first part 11 away from the second part 12 may form an abutting end 114 .

[0110] Please continue to refer to Figure 1 and Figure 2 The embodiment of the present application also provides an acetabular cup 200, the outer surface of the acetabular cup 200 includes a first end surface 21. The acetabular cup 200 is also provided with a mounting cavity 22 and a guide hole 23. The opening of the mounting cavity 22 is located on the first end surface 21 and is used to install the liner, and the opening of the guide hole 23 is located on the first end surface 21. The guide hole 23 is used for inserting the liner extractor 100 to guide the liner extractor 100 to abut against the first end surface 21.

[0111] In some embodiments, the matching structure of the acetabular cup 200 and the liner extractor 100 can refer to the matching structure of the acetabular cup 200 and the liner extractor 100 described above, and the embodiments of the present application will not be described in detail here.

[0112] The embodiment of the present application further provides an acetabular cup kit, which may include the liner extractor 100 and / or the acetabular cup 200 described above.

[0113] Exemplarily, the acetabular cup kit may include an acetabular cup 200 , a liner, and a liner extractor 100 .

[0114] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0115] The above is a detailed introduction to an acetabular cup liner remover, an acetabular cup and an acetabular cup kit provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A liner extractor for an acetabular cup, characterized in that: The outer surface of the acetabular cup includes a first end surface, and the acetabular cup is further provided with a mounting cavity and a guide hole. The opening of the mounting cavity is located at the first end surface and is used to install the liner, and the opening of the guide hole is located at the first end surface; the liner extractor includes: an abutment surface, the abutment surface being used to abut against the first end surface to apply a knocking force to the acetabular cup; and A guide portion is protruding from the abutting surface, and is used to be inserted into the guide hole to guide the abutting surface to abut against the first end surface.

2. The liner extractor according to claim 1, characterized in that: The outer surface of the guide portion is a part of a spherical surface or an ellipsoidal surface.

3. The liner extractor according to claim 2, characterized in that: The outer surface of the guide portion is a hemispherical surface, and the radius of the guide portion is 0.7 mm to 0.8 mm.

4. The liner extractor according to claim 1, characterized in that: The distance between the edge of the abutting surface and the guide portion is 0.3 mm to 0.45 mm.

5. The liner extractor according to any one of claims 1 to 4, characterized in that: The liner extractor comprises: A first portion, the first portion being formed with the abutment surface and the guide portion; and The second part is installed on a side of the first part away from the abutting surface, and the second part is used to receive the knocking of an external instrument so as to apply the knocking force to the acetabular cup through the abutting surface of the first part.

6. The liner extractor according to claim 5, characterized in that: The second part includes a second rod body, the first part includes a first rod body, the first rod body is installed at one end of the second rod body, and the end of the first rod body away from the second rod body is formed with the abutment surface and the guide portion; Wherein, the cross-sectional area of ​​the first rod body is smaller than the cross-sectional area of ​​the second rod body, and the length of the first rod body is 10 cm to 15 cm.

7. The liner extractor according to claim 6, characterized in that: One end of the first rod body away from the second rod body is tapered, so that the cross-sectional area of ​​the end of the first rod body away from the second rod body is smaller than the cross-sectional area of ​​the middle part of the first rod body; The abutting surface is an end surface of the first part which is away from the second part.

8. The liner extractor according to claim 6, characterized in that: The first rod body is an integrally formed structure; and / or The Rockwell hardness of the first rod body is greater than 53.

9. The liner extractor according to claim 5, characterized in that: The first part and the second part are detachably connected or fixed by welding.

10. The liner extractor according to claim 5, characterized in that: The second part includes a striking portion, which is located on a side of the second part away from the first part, and is used to receive striking from an external instrument so as to apply the striking force to the acetabular cup through the first part; wherein, The end surface of the striking portion facing away from the first portion is a convex surface; and / or The striking portion comprises a second end surface facing away from the first portion and a first annular wall arranged around the second end surface, wherein at least one side of the first annular wall in the circumferential direction is a plane; The second part further includes a second rod body, one end of the second rod body is connected to the knocking part, and the other end is connected to the first part, and the peripheral edge of the knocking part protrudes from the outer peripheral side of the second rod body.

11. The liner extractor according to any one of claims 1 to 4, characterized in that: The outer diameter of the guide portion is smaller than or equal to the inner diameter of the guide hole.

12. A liner extractor for an acetabular cup, characterized in that: It comprises a striking end and an abutting end which are arranged opposite to each other along the length direction, wherein the striking end is used to receive the striking of an external instrument, and the abutting end comprises an abutting surface and a guide portion, wherein the abutting surface is located on the side of the abutting end away from the striking end, and the guide portion is protruding from the side of the abutting surface away from the striking end.

13. The liner extractor according to claim 12, characterized in that: The outer surface of the guide portion is a hemispherical surface, and the radius of the guide portion is 0.7 mm to 0.8 mm; and / or The distance between the edge of the abutting surface and the guide portion is 0.3 mm to 0.45 mm.

14. An acetabular cup, characterized in that: The outer surface of the acetabular cup includes a first end face, and the acetabular cup is also provided with a mounting cavity and a guide hole. The opening of the mounting cavity is located on the first end face and is used to install the liner. The opening of the guide hole is located on the first end face, and the guide hole is used for inserting a liner remover to guide the liner remover to abut against the first end face.

15. An acetabular cup kit, characterized in that: Comprising a liner extractor as claimed in any one of claims 1 to 13 and / or an acetabular cup as claimed in claim 14.

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