Combination tool for acetabular bone defect

Abstract

The utility model provides a combined tool for acetabular bone defects, which belongs to the technical field of medical instruments and comprises a semilunar acetabular file, a semilunar acetabular file connecting rod, a semilunar cushion block test mold, a semispherical cushion block test mold, a pair of cushion block clamping forceps, a positioning pin and a cushion block striker. The hip joint cushion block prosthesis is used in hip joint revision, is a set of tool for implanting a semilunar cushion block prosthesis and a semispherical cushion block prosthesis, is mainly used for rebuilding bone defects of different degrees above and at the bottom of an acetabulum, and can be used for quickly and accurately mounting the cushion block prosthesis suitable for the defects, so that the original sclerotin is reserved as far as possible, and the bone defect is avoided. Meanwhile, the precise adaptation with the acetabular cup prosthesis can be improved, the operation efficiency is further improved, and the operation time is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a combined tool for acetabular bone defect. BACKGROUND

[0002] With the development of social economy, the continuous improvement of people's living standards and average life expectancy, the number of artificial hip joint replacement population is rising, and the number of total hip arthroplasty revision is also increasing. The premise of implementing hip revision is that after total hip arthroplasty, if the prosthesis is loose or the surgical effect is not good, it will affect people's normal life. In this case, the replaced hip prosthesis needs to be repaired again. Generally speaking, the bone will have different degrees of defects at this time. Such defects are not suitable for the use of the original prosthesis, so it is very important to install a suitable block prosthesis for the defect and fill it accurately and stably to the defect position.

[0003] According to Paprosky classification, acetabular bone defects can be divided into: type I, type II A, type II B, type II C, type III A and type III B. Type I defect involves less bone defect and does not affect the acetabular circumference; type II defect has three subtypes, all of which involve the acetabular circumference; type III defect has two subtypes, both of which involve the acetabular circumference. For Paprosky type I and type II A defects, a larger diameter acetabular cup can be directly pressed and fitted; for type II B and above acetabular bone defects, in order to increase the bone mass in contact with the prosthesis, a block prosthesis is needed to fill the bone defect position, and then an acetabular cup is installed.

[0004] For the bone defect above the acetabulum, a semilunar block prosthesis can be selected for filling. Currently, doctors do not have a complete set of special tools to implant the semilunar block prosthesis into the human body when implanting the semilunar block prosthesis. A semispherical file is used when grinding the acetabular defect, which will grind a large amount of bone, resulting in a large amount of bone loss. After grinding, a semilunar block prosthesis that matches the profile is usually selected and fixed in the defect position, and then a matching acetabular cup prosthesis is selected for subsequent operation. There are two ways to install the semilunar block prosthesis at present: (1) without using a block test model: directly selecting a suitable size of semilunar block prosthesis according to experience, and then directly placing the block prosthesis into the human body with hands. (2) using a block test model: according to the size of the ground acetabular defect area and the size of the acetabular cup test model, selecting the appropriate size of the block test model, and using clamping forceps to clamp and install the test model at the defect position. After repeated selection and testing, the block test model is removed and the block prosthesis of the same size is installed, and then the concave surface of the block prosthesis is knocked with a hammer to fit the bone. The above two methods have the problems of difficulty in selecting the block prosthesis and easy change of the position of the fixed block prosthesis for some inexperienced doctors.

[0005] For the bone defect of the acetabular floor, most doctors currently use Augment pads for splicing or cup on cup technology. The semi-spherical pad prosthesis on the market is just beginning to be implemented, so only a small number of doctors will choose the semi-spherical pad prosthesis. When choosing to install and fill the semi-spherical pad prosthesis, most doctors will not choose a test model and will directly choose a prosthesis for installation. When choosing a semi-spherical pad prosthesis, it is also mostly based on experience, and then the pad prosthesis is directly placed into the human body by hand. For some inexperienced doctors, there are problems of difficulty in selecting the pad prosthesis and poor initial stability of the pad prosthesis.

[0006] Therefore, the current problems of hip joint prosthesis repair are as follows:

[0007] (1) The semi-spherical acetabular reamer is used to polish the defect area, and since the contact area with the bone surface is relatively large, a large amount of bone will be ground off, and the polishing process needs to rely on hand feeling, and the bone loss is relatively serious.

[0008] (2) When installing the semi-lunar pad prosthesis, there is no tool that can switch between the test model and the prosthesis, resulting in a difference between the position of the installed pad prosthesis and the pad test model, and the pad prosthesis cannot be installed at the originally determined position.

[0009] (3) After installing the semi-lunar pad prosthesis, a striker needs to be used for striking and compacting. Since the front end of the current striker is arc-shaped, it can only strike at the concave surface of the pad prosthesis, and the direction of striking is only one, lacking a tool for striking from the end surface to the inside, resulting in poor initial stability of the prosthesis after installation.

[0010] (4) After the semi-lunar pad prosthesis is installed, it needs to be fixed in place using a screw. During the screw fixing process, one person needs to hold the pad prosthesis, and the other person needs to drill holes and screw the screw, requiring two people to operate together, which is complicated for the operator, and also causes the position of the pad prosthesis to change when the screw is screwed.

[0011] (5) There is a lack of semi-spherical pad test models, and the initial stability of the semi-spherical pad prosthesis after implantation is poor.

[0012] (6) When implanting the semi-lunar pad prosthesis and the semi-spherical pad prosthesis, there is currently no set of special tools that can quickly and accurately install the pad prosthesis in place, and only some scattered single tools are used, which prolongs the operation time and reduces the operation efficiency. Invention content

[0013] The problem to be solved by the present application is to provide a combination tool for acetabular bone defects.

[0014] To solve the above technical problems, the utility model adopts the technical scheme: a kind of combined tool for acetabular bone defect, including half-moon acetabular file, half-moon acetabular file connecting rod, half-moon pad block test mould, half-sphere pad block test mould, pad block clamping forceps, positioning pin and pad block striker.

[0015] The half-moon acetabular file includes file body and connecting column, the file body is flat arc, the file body back surface is equipped with file blade, the file body bottom end surface is fixed with connecting column, and the connecting column is used to connect half-moon acetabular file connecting rod to realize the reciprocating motion of half-moon acetabular file;The direction of the file blade is consistent with the direction of the connecting column, for grinding the bone quality of the defect area, so that the shape of the grinding area has the contour matching with the half-moon pad block test mould;The inner side of the file body is concave structure, for matching the specification of acetabular cup test mould;The half-moon acetabular file realizes accurate grinding of the defect area, can retain a large amount of original bone quality, and is beneficial to the long-term stability of pad block prosthesis.

[0016] The half-moon acetabular file connecting rod includes center rod, one end of the center rod is half-moon acetabular file connecting end, the other end is electric tool connecting end, the half-moon acetabular file connecting rod reciprocates left and right, thereby driving the half-moon acetabular file to move, and the driving mode of half-moon acetabular file movement is electric, saving manpower.

[0017] The half-moon pad block test mould is flat arc, the half-moon pad block test mould includes concave surface and end surface, a plurality of screw holes are arranged on the concave surface and end surface respectively, to solve the problem of screw hole planning in intraoperative adaptation;The end surface is equipped with positioning hole at both ends, for fixing the half-moon pad block test mould to bone quality, to solve the problem that the installation position of prosthesis and half-moon pad block test mould is inconsistent.

[0018] The half-sphere pad block test mould includes outer curved surface and inner curved surface, the inner curved surface cooperates with the outer surface of acetabular cup test mould, the outer curved surface cooperates with physiological acetabulum, and the half-sphere pad block test mould is equipped with threaded hole at middle position, for connecting the half-sphere pad block test mould with conventional test mould handle, and then matching to human body.Solve the problem of difficult selection of pad block prosthesis, save operation time.

[0019] The pad block clamping forceps include handle and clamping head, the handle is used to realize clamping of pad block test mould (including half-moon pad block test mould and half-sphere pad block test mould) during operation;The clamping head is provided with a plurality of clamping teeth, the clamping teeth are used to increase the friction between pad block clamping forceps and pad block test mould, to prevent falling during clamping, and realize stable clamping of pad block test mould.

[0020] The positioning pin is provided with a threaded end and a driving end, the threaded end is matched with a positioning hole of the half-moon shaped pad test mold for fixing the half-moon shaped pad test mold in the bone, and the driving end is used for connecting an electric tool.

[0021] The pad striker is provided with a striker head at one end and a handle at the other end, the striker head comprises a curved surface structure and a plane structure, and can realize striking different areas of the pad test mold (including the half-moon shaped pad test mold and the half-sphere shaped pad test mold) and the prosthesis, and the end surface of the handle is a striking surface used for striking by external force.

[0022] Further, the connecting column is provided with a limiting groove at the end.

[0023] Further, the half-moon shaped acetabulum file connecting end is provided with a button connected with the connecting column of the half-moon shaped acetabulum file, when assembled, the connecting column of the half-moon shaped acetabulum file is inserted into the half-moon shaped acetabulum file connecting end, and the limiting groove of the connecting column is limited by the button end.

[0024] Further, the center rod is provided with a sleeve.

[0025] Further, the concave surface is provided with a recessed groove in the middle, which solves the problem that the overall quality of the product is too large to affect the production stability, and avoids the problem that the screw hole is blocked after being matched with the acetabular cup test mold.

[0026] Further, the half-sphere shaped pad test mold has a thickness of 5-30mm and a diameter of 40-80mm.

[0027] Further, the outer curved surface is composed of a plurality of ridges, adjacent ridges are provided with hollow structures, which is convenient for planning screws during the operation and takes into account the weight of the half-sphere shaped pad test mold, one ridge screw hole is arranged on each ridge, and the ridge screw hole is used for planning screws in a large area of bone loss in Paprosky IIIA and Paprosky IIIB types.

[0028] Further, the curved surface structure and the plane structure are arranged in a stepped manner.

[0029] Due to the above technical scheme, the present application has the following beneficial effects:

[0030] (1) The present application can accurately grind and file the acetabular defect area and retain a large amount of original bone, which is beneficial to the long-term stability of the pad prosthesis.

[0031] (2) The utility model discloses can install the position of half moon shaped pad block prosthesis accurately, can be installed on the position of half moon shaped pad block test mould determined, further improve the adaptability of pad block prosthesis and cup prosthesis.

[0032] (3) The utility model discloses can increase pad block prosthesis and the adhesion of bone quality, be beneficial to the initial stability of pad block prosthesis.

[0033] (4) The utility model discloses can improve the stability and reliability of pad block prosthesis implantation, reduce the operation operation step.

[0034] (5) The utility model discloses can improve the operation efficiency, save the operation time.

[0035] It can be seen that the utility model discloses a set of tools for implanting half moon shaped pad block prosthesis and half spherical pad block prosthesis in hip joint revision surgery, mainly used for reconstructing different degrees of bone defects on the top of acetabulum and the bottom of acetabulum, which can quickly and accurately install the pad block prosthesis suitable for the defect, retain the original bone quality as much as possible, improve the accurate adaptation with cup prosthesis, further improve the operation efficiency and save the operation time. BRIEF DESCRIPTION OF DRAWINGS

[0036] The advantages and implementation modes of the utility model will be more obvious by referring to the drawings and combining examples, wherein the contents shown in the drawings are only used for explaining and describing the utility model and do not constitute any sense of limitation to the utility model, and in the drawings:

[0037] Figure 1 It is the structure schematic view of half moon shaped acetabulum file of the utility model.

[0038] Figure 2 It is the structure schematic view of another angle of half moon shaped acetabulum file of the utility model.

[0039] Figure 3 It is the structure schematic view of connecting rod of half moon shaped acetabulum file of the utility model.

[0040] Figure 4 It is the structure schematic view of half moon shaped pad block test mould of the utility model.

[0041] Figure 5 It is the structure schematic view of half spherical pad block test mould of the utility model.

[0042] Figure 6 It is the structure schematic view of another angle of half spherical pad block test mould of the utility model.

[0043] Figure 7 It is the structure schematic view of pad block clamping forceps of the utility model.

[0044] Figure 8 It is the structure schematic view of clamping tooth of the utility model.

[0045] Figure 9 It is the structure schematic view of the positioning pin of the utility model.

[0046] Figure 10 It is the structure schematic view of the cushion block striker of the utility model.

[0047] Figure 11 It is the structure schematic view of the semilunar acetabular file and semilunar acetabular file connecting rod combination of the utility model.

[0048] Figure 12 It is the structure schematic view of the semilunar cushion block test mold and cushion block clamping forceps combination of the utility model.

[0049] Figure 13 It is the structure schematic view of the semilunar cushion block test mold and cushion block clamping forceps combination of the utility model.

[0050] Figure 14 It is the structure schematic view of the positioning pin and semilunar cushion block test mold combination of the utility model.

[0051] Figure 15 It is the structure schematic view of the cushion block striker and semilunar cushion block test mold end surface combination of the utility model.

[0052] Figure 16 It is the structure schematic view of the cushion block striker and semilunar cushion block test mold concave surface combination of the utility model.

[0053] Figure 17 It is the structure schematic view of the cushion block striker and semilunar cushion block test mold combination of the utility model.

[0054] In the drawing:

[0055] 1, semilunar acetabular file;2, semilunar acetabular file connecting rod;3, semilunar cushion block test mold;4, semilunar cushion block test mold;5, cushion block clamping forceps;6, positioning pin;7, cushion block striker;101, file body;102, connecting column;103, file blade;104, limit recess;201, center rod;202, button;203, sleeve;301, concave surface;302, end surface;303, recessed groove;304, screw hole;305, positioning hole;401, outer curved surface;402, inner curved surface;403, ridge;404, threaded hole;501, handle;502, clamping head;503, clamping tooth;601, threaded end;602, driving end;701, striker head;702, handle;703, arc surface structure;704, plane structure;705, striking surface. DETAILED DESCRIPTION

[0056] As Figures 1 to 17As shown in the utility model discloses a kind of combined tools in acetabular bone defect, including half-moon acetabular file 1, half-moon acetabular file connecting rod 2, half-moon pad block test mould 3, half-sphere pad block test mould 4, pad block clamping forceps 5, positioning pin 6 and pad block striker 7.

[0057] As Figure 1 And Figure 2 As shown, half-moon acetabular file 1 includes file body 101 and connecting column 102, file body 101 is flat arc, file body 101 back surface is equipped with file blade 103, file body 101 bottom end surface is fixed with connecting column 102, connecting column 102 end is provided with limiting groove 104, this connecting column 102 is used to connect half-moon acetabular file connecting rod 2 and carry out reciprocating motion;The direction of file blade 103 is consistent with the direction of connecting column 102, for grinding the bone quality of defective area, make the shape of grinding area have the shape contour matched with half-moon pad block test mould 3;The inside of file body 101 is recessed structure, for matching the specification of acetabular cup test mould.

[0058] Half-moon acetabular file 1 realizes accurate grinding of defective area, can retain a large amount of original bone quality, is conducive to the long-term stability of pad block prosthesis.

[0059] As Figure 3 As shown, half-moon acetabular file connecting rod 2 includes center rod 201, one end of center rod 201 is half-moon acetabular file connecting end, the other end is electric tool connecting end, half-moon acetabular file connecting end side is equipped with the button 202 connected with the connecting column 102 of half-moon acetabular file 1, when assembling, the connecting column 102 of half-moon acetabular file 1 is inserted into half-moon acetabular file connecting end, and the limiting groove 104 of connecting column 102 is clamped and limited by the end of button 202;Sleeve 203 is provided on center rod 201, and spring is arranged between sleeve 203 and center rod 201.

[0060] Half-moon acetabular file connecting rod 2 reciprocates left and right, so as to drive half-moon acetabular file 1 to move, and the driving mode of half-moon acetabular file 1 movement is electric, which saves manpower.

[0061] As Figure 4 As shown, half-moon pad block test mould 3 is flat arc, and the half-moon pad block test mould 3 includes concave surface 301 and end surface 302, the concave surface 301 is provided with recessed groove 303 in the middle, the recessed groove 303 solves the problem that the overall quality of the product is large, which affects the production stability, and avoids the problem that the nail hole is blocked after cooperating with the acetabular cup test mould;Multiple screw holes 304 are arranged on the concave surface 301 and the end surface 302 respectively, so as to solve the problem of nail hole planning in the intraoperative adaptation process;The end surface 302 is provided with positioning hole 305 at both ends, for fixing half-moon pad block test mould 3 to the bone, so as to solve the problem that the installation position of the prosthesis and half-moon pad block test mould 3 is inconsistent.

[0062] AsFigure 5 and Figure 6 As shown in the figure, the semispherical spacer test model 4 includes an outer curved surface 401 and an inner curved surface 402, the inner curved surface 402 is matched with the outer surface of the acetabular cup test model, and the outer curved surface 401 is matched with the physiological acetabulum. The thickness of the semispherical spacer test model 4 is 5-30 mm, and the diameter is 40-80 mm. The outer curved surface 401 is composed of 3-5 ridges 403, and the ridges 403 are provided with hollow structures between the ridges 403, which is convenient for planning screws in the operation, and also takes into account the weight of the semispherical spacer test model 4. One ridge screw hole is arranged on each ridge 403, which is used for planning screws in the large area bone loss of Paprosky ⅢA and Paprosky ⅢB types. A threaded hole 404 is arranged at the middle position of the semispherical spacer test model 4, which is used for connecting the semispherical spacer test model 4 with a conventional test model handle, and then matching to the human body. The problem of difficult selection of spacer prosthesis is solved, and the operation time is saved.

[0063] As shown in the figure, Figure 7 and Figure 8 The spacer clamping forceps 5 include a handle 501 and a clamping head 502. The handle 501 is used for clamping the spacer test model (including the semilunar spacer test model 3 and the semispherical spacer test model 4) in the operation process. The clamping head is provided with a plurality of clamping teeth 503. The clamping teeth 503 are used for increasing the friction between the spacer clamping forceps 5 and the spacer test model, preventing the spacer test model from falling to the ground during clamping, and realizing the stable clamping of the spacer test model.

[0064] As shown in the figure, Figure 9 The positioning pin 6 has a threaded end 601 at one end and a driving end 602 at the other end. The threaded end 601 is used for fixing the semilunar spacer test model 3 in the bone. The driving end 602 is used for connecting an electric tool. When the semilunar spacer test model 3 is switched and installed with the prosthesis, the semilunar spacer prosthesis and the semilunar spacer test model 3 are installed in the same position, and the accuracy of the installation of the semilunar spacer prosthesis is improved.

[0065] As shown in the figure, Figure 10 The spacer striker 7 is provided with a striker head 701 at one end and a handle 702 at the other end. The end face of the striker head 701 includes an arc surface structure 703 and a plane structure 704. The arc surface structure 703 and the plane structure 704 are arranged in a stepped manner, which can realize the striking of different areas of the spacer test model (including the semilunar spacer test model 3 and the semispherical spacer test model 4) and the prosthesis. The end face of the handle 702 is a striking surface 705, which is used for knocking with the help of external force.

[0066] The spacer striker 7 improves the initial stability of the spacer test model and the prosthesis in multiple dimensions.

[0067] The utility model is composed of multiple components, and each component needs to be used in cooperation in the use process of the hip joint revision. The specific use process is as follows:

[0068] Half-moon shaped pad prosthesis installation process:

[0069] S1, trim the acetabular area: use a conventional hemispherical acetabular reamer to grind the normal acetabulum.

[0070] S2, trim the pad defect area: as shown in Figure 11 , use a conventional trial handle to connect the acetabular trial, the concave structure of the reamer body 101 of the half-moon shaped acetabular reamer 1 is fitted to the acetabular trial, the back reamer edge 103 is fitted to the bone, the half-moon shaped acetabular reamer 1 and the half-moon shaped acetabular reamer connecting rod 2 are assembled, and the acetabular defect area is reciprocated for accurate grinding.

[0071] S3, trial matching: as shown in Figure 12 , use the pad clamping forceps 5 to clamp the half-moon shaped pad trial 3 of the same specification as the final half-moon shaped acetabular reamer 1, and adapt it to the acetabular trial.

[0072] S4, trial fixing: as shown in Figure 14 , use two positioning pins 6 to fix the adapted half-moon shaped pad trial 3, insert the positioning pins 6 into the positioning holes 305 of the half-moon shaped pad trial 3 for fixing, as shown in Figure 15 and Figure 16 , then the pad striker 7 can be used to knock and fix the half-moon shaped pad trial 3, making it more fitted to the bone.

[0073] S5, install the half-moon shaped pad prosthesis: after fixing, the half-moon shaped pad trial 3 can be clamped down with the pad clamping forceps 5, and the same specification half-moon shaped pad prosthesis can be installed along the positioning pins 6 with the pad clamping forceps 5, then the pad striker 7 can be used to knock and fix the half-moon shaped pad prosthesis, making it more fitted to the bone, finally the half-moon shaped pad prosthesis is fixed to the bone with screws, and after fixing, the positioning pins 6 can be removed.

[0074] Hemispherical pad prosthesis installation process:

[0075] S1, trim the acetabular area: use a conventional hemispherical acetabular reamer to grind the normal acetabulum.

[0076] S2, trim the pad defect area: use a conventional hemispherical acetabular reamer to grind the defect area.

[0077] S3, trial matching: as shown in Figure 13 , use the pad clamping forceps 5 to clamp the half-moon shaped pad trial 4 of the same specification as the final acetabular reamer for grinding the defect area, and adapt it to the acetabular trial. Figure 17 , the pad striker 7 can be used to knock and fix the half-moon shaped pad trial 4, making it more fitted to the bone.

[0078] S4, install the half ball pad prosthesis: can be used pad clamp pliers 5 half ball pad test model 4 down, also can be used test model handle half ball pad test model 4 down. Again with pad clamp pliers 5 of the same specification half ball pad prosthesis clamp installation, then use pad impactor 7 on the prosthesis knock fixed, make it more fit bone.

[0079] The above detailed description of the embodiments of the present application, but the content is only a preferred embodiment of the present application, can not be considered for limiting the scope of the present application. Any equivalent changes and improvements within the scope of the present application, should still belong to the present application within the scope of the present application.

Claims

1. A combination tool for acetabular bone defects, characterized by: The application relates to a half-moon acetabulum file, a half-moon acetabulum file connecting rod, a half-moon pad test mold, a half-sphere pad test mold, a pad clamping forceps, a positioning pin and a pad striker, wherein the half-moon acetabulum file comprises a file body and a connecting column; the file body is in a flat arc shape, a file blade is arranged on the back outer surface of the file body, and the bottom end surface of the file body is fixed with the connecting column; the connecting column is used for connecting the half-moon acetabulum file connecting rod to realize the reciprocating movement of the half-moon acetabulum file; the direction of the file blade is consistent with the direction of the connecting column; the inner side of the file body is in a recessed structure; the half-moon acetabulum file connecting rod comprises a center rod, one end of the center rod is a half-moon acetabulum file connecting end, and the other end is an electric tool connecting end; the half-moon pad test mold is in a flat arc shape; the half-moon pad test mold comprises a concave surface and an end surface; a plurality of screw holes are arranged on the concave surface and the end surface respectively; and positioning holes are arranged at the two ends of the end surface; the half-sphere pad test mold comprises an outer curved surface and an inner curved surface; the inner curved surface is matched with the outer surface of an acetabular cup test mold; the outer curved surface is matched with a physiological acetabulum; and a threaded hole is arranged at the middle position of the half-sphere pad test mold; the pad clamping forceps comprises a handle and a clamping head; a plurality of clamping teeth are arranged on the clamping head; one end of the positioning pin is a threaded end, and the other end is a driving end; the threaded end is matched with the positioning hole of the half-moon pad test mold and is used for fixing the half-moon pad test mold in bone; the driving end is used for connecting an electric tool; one end of the pad striker is provided with a striker head, and the other end is provided with a handle; the striker head comprises an arc surface structure and a plane structure; and the end surface of the handle is a striking surface.

2. The combined tool for acetabular bone defects according to claim 1, characterized in that: A limiting groove is arranged at the end of the connecting column.

3. The combination tool for acetabular bone defects according to claim 2, characterized in that: A button connected with the connecting column of the half-moon acetabulum file is arranged on one side of the half-moon acetabulum file connecting end; when assembled, the connecting column of the half-moon acetabulum file is inserted into the half-moon acetabulum file connecting end; and the limiting groove of the connecting column is limited by the button end.

4. The combination tool for acetabular bone defects according to claim 1, characterized in that: A sleeve is arranged on the center rod.

5. The combination kit for acetabular bone defects according to claim 1, wherein: A recessed groove is arranged in the middle of the concave surface.

6. The combination tool for acetabular bone defects according to claim 1, characterized in that: The half-sphere pad test mold has a thickness of 5-30 mm and a diameter of 40-80 mm.

7. The combination kit for acetabular bone defects of claim 1, wherein: The outer curved surface comprises a plurality of ridges, adjacent ridges are arranged to be hollow, and one ridge screw hole is arranged on each ridge.

8. The combination tool for acetabular bone defects according to claim 1, characterized in that: The arc surface structure and the plane structure are arranged in a stepped mode.

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