Disposable acetabulum file and knife block replacing method

Abstract

The invention discloses a disposable acetabulum file and a tool block replacing method, the disposable acetabulum file comprises a hemispherical tool rest and a file, the hemispherical tool rest is of a hemispherical shell structure formed through plastic injection molding, and a crosshead used for clamping is integrally formed at the bottom of the hemispherical tool rest through injection molding; a plurality of filing holes are formed in a shell of the hemispherical knife rest, the files are fixedly connected to one sides of the filing holes, and the cantilever ends of the files stretch into the filing holes and protrude out of the outer spherical wall of the hemispherical knife rest. The semispherical cutter rest made of plastic is adopted to support the file, so that the cost of expensive metal materials is reduced, and cross infection is avoided.

Description

Technical Field

[0001] The invention relates to the field of orthopedic surgical tools, in particular to a disposable acetabular rasp and a tool block replacement method. Background Art

[0002] Acetabular rasp is a medical device used to remove acetabular cartilage and some bone tissue. It is a special surgical instrument used in total hip replacement surgery to trim the acetabular socket to a suitable shape and size for accurate installation of the artificial acetabular prosthesis.

[0003] The existing acetabular rasps are hemispherical metal designs with sharp teeth on the surface, which can efficiently cut bone. Most of them are made of stainless steel or titanium alloy. For example, the applicant's prior patent application, the utility model with announcement number CN209059342U, discloses an acetabular rasps that takes less time to cut bone and forms a regular cutting pattern. It includes a hemispherical shell and a support rod welded at the circular opening of the hemispherical shell. A plurality of blade holes are arranged on the hemispherical shell, and the hemispherical shell is divided into at least five latitude intervals from bottom to top. Each group of three blade holes is respectively arranged in different latitude intervals of the hemispherical shell; in any latitude interval, the latitudes of the three blade holes gradually increase / or decrease, and the longitudes of the three blade holes differ by 120° in sequence; the two blade holes located in two adjacent latitude intervals and with the smallest latitude difference have a longitude difference of 20° to 100°. In the acetabular rasps in the patented technical solution, the blade holes are integrally formed on the hemispherical stainless steel shell. This one-piece molding method is prone to incomplete cleaning and disinfection due to the presence of the blade hole groove, and repeated use may cause cross infection. The entire body is made of medical grade stainless steel or titanium alloy. If it is discarded after one use, it will cause great waste and increase the cost of surgery.

[0004] In order to overcome the above problems, a disposable acetabular rasp needs to be developed. Summary of the invention

[0005] The purpose of the present invention is to provide a disposable acetabular rasp, which adopts a hemispherical tool holder made of plastic material to support the rasp, thereby reducing the cost of expensive metal materials and avoiding cross infection.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The disposable acetabular rasp of the present invention comprises: a hemispherical tool holder and a file, wherein the hemispherical tool holder is a hemispherical shell structure formed by plastic injection molding, and a cross head for clamping is integrally formed by injection molding at the bottom of the hemispherical tool holder; a plurality of file holes are formed on the shell of the hemispherical tool holder, and the file is fixedly connected to one side of the file holes, and the cantilever end of the file penetrates into the file holes and protrudes from the outer spherical wall of the hemispherical tool holder.

[0008] Further, the file is specifically a blade, the root of the blade is directly injection-molded and anchored in the housing material of the hemispherical tool holder, and the cantilever end face of the blade is set as a cutting edge face.

[0009] Further, the cantilever end of the blade is an arc-shaped plate, and both ends are provided with folded edges bent inward.

[0010] Further, the embedded section of the blade is provided with an anchoring hole, and the housing material of the hemispherical tool holder is filled in the anchoring hole.

[0011] Further, the file is specifically a tool block, the file hole is a horseshoe-shaped through hole, a tool groove is recessed and formed on one side of the straight edge of the file hole on the outer wall of the hemispherical tool holder, and the tool block is installed in the tool groove by screws.

[0012] Further, a countersunk through hole is opened on the top surface of the tool block, and a countersunk screw passes through the countersunk through hole and is threadedly connected to a threaded hole on the bottom surface of the tool groove.

[0013] Further, a thickening protrusion is additionally provided on the bottom surface of the hemispherical tool holder at the position of the threaded hole.

[0014] Further, the file holes are divided into multiple groups according to different latitudes on the hemispherical tool holder, and each group includes a plurality of the file holes evenly distributed in a circumferential manner; the installation lengths of the tool grooves corresponding to the file holes at different latitudes are different, and the installation length of the tool groove corresponding to the file hole at a higher latitude is greater than that at a lower latitude; the countersunk through hole of the tool block includes a waist-shaped hole at the bottom and a relief groove at the upper part, and the lengths of the tool blocks corresponding to the file holes at different latitudes are different, and the length of the tool block corresponding to the file hole at a higher latitude is greater than that at a lower latitude.

[0015] Method for replacing the tool block of a disposable acetabular file. After disassembling the tool block of the above-mentioned disposable acetabular file, it is cleaned, disinfected, and installed on a new hemispherical tool holder for reuse; the original hemispherical tool holder is discarded and treated as medical waste.

[0016] Further, when the tool block is worn, the tool block on the file hole at the lowest latitude is discarded, the tool block at a higher latitude level is transferred to the next latitude for continued use, and a new tool block is used on the file hole at the highest latitude.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The disposable acetabular rasp of the present invention adopts a relatively cheap plastic material to make a hemispherical tool holder, which can play a role in supporting the file, and is disposable, thereby avoiding cross infection between patients; and reduces material costs, thereby meeting the economic benefits of disposable use. The disposable acetabular rasp of the present invention adopts a plastic material hemispherical tool holder to support the file, thereby reducing the cost of expensive metal materials and avoiding cross infection.

[0019] In addition, by adopting the direct anchoring method during injection molding, it is only necessary to place each blade, and the installation of the blade is completed at the same time of injection molding. Compared with the stainless steel sheet being machined into a hemispherical shape, the injection molding process is mature and the cost is lower; because it only needs to be used once, the thickness of the blade can be reduced, and the cutting performance is improved while reducing the amount of stainless steel material used. By setting the cantilever end of the blade as an arc plate, the deformation resistance of the blade during filing is increased, and the setting of the folding edge also improves the strength of the blade to reduce hard bending and deformation; by setting the anchoring hole in the embedded section of the blade, the anchoring strength of the blade is increased, and it will not fall out from the root. The knife block is installed in the knife groove by screws to act as a chip element for filing, realizing a detachable knife block. The knife block can be disassembled and reused by abandoning the hemispherical knife holder, which further improves the economy of the present application. Moreover, the single knife block does not have complex structural features, is easy to clean and disinfect, is suitable for repeated use, and will not cause cross infection. By providing the countersunk through hole on the top surface of the blade block, the nut height of the countersunk screw can be reduced to avoid interference; by providing a thickened protrusion on the bottom surface of the threaded hole, the effective thread length of the threaded hole can be increased to avoid the countersunk screw from being pulled off. By reasonably setting the blade block lengths corresponding to the filing holes at different latitudes, the blade block that is not excessively worn at a high latitude can be switched to a low-latitude installation position for continued use, thereby increasing the service life of a single blade block. By adapting the waist-shaped hole and the blade groove installation length, it can be ensured that the blade block can be switched to the optimal ejection length state for filing by using a universal screw method after switching.

[0020] The disposable acetabular rasp blade replacement method of the present invention uses the same blade block multiple times at different latitudes by rotating the installation position, thereby increasing the working life of a single blade block, avoiding waste, further improving the economy of the acetabular rasp of the present application, and reducing the cost of surgical instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the main structure of a disposable acetabular rasp according to Example 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the blade position in Example 1 of the present invention;

[0024] Figure 3 It is a front view structural schematic diagram of a knife block installation position in Embodiment 2 of the present invention;

[0025] Figure 4 It is a sectional view structural schematic diagram of the knife block position in Embodiment 2 of the present invention;

[0026] Figure 5 It is a top view structural schematic diagram of the knife block in Embodiment 2 of the present invention.

[0027] Explanation of reference numerals: 1, hemispherical tool rest; 101, filing hole; 102, crosshead; 103, tool slot; 1031, positioning bottom edge; 104, threaded hole; 105, thickening protrusion; 2, blade; 201, folded edge; 202, anchoring hole; 3, knife block; 301, waist-shaped hole; 302, relief groove; 4, countersunk head screw. Detailed implementation manners

[0028] The core of the present invention is to provide a disposable acetabular file, which uses a hemispherical tool rest made of plastic material to support the file, reducing the cost of expensive metal materials and avoiding cross-infection.

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] Referring to the accompanying drawings, Figure 1 It is a front view structural schematic diagram of the disposable acetabular file in Embodiment 1 of the present invention; Figure 2 It is a sectional view structural schematic diagram of the blade position in Embodiment 1 of the present invention; Figure 3 It is a front view structural schematic diagram of a knife block installation position in Embodiment 2 of the present invention; Figure 4 It is a sectional view structural schematic diagram of the knife block position in Embodiment 2 of the present invention; Figure 5 It is a top view structural schematic diagram of the knife block in Embodiment 2 of the present invention.

[0032] Embodiment 1

[0033] In a specific embodiment, as Figure 1 and Figure 2 shown, for the disposable acetabular reamer hemispherical tool holder 1 and the reamer of the present invention, the two are no longer integrally formed of the same material. The hemispherical tool holder 1 is a hemispherical shell structure formed by plastic injection molding, such as materials of ABS, PP or PE. A cross head 102 for clamping is integrally injection molded at the bottom of the hemispherical tool holder 1. In order to improve the strength, the thickness of the plastic shell is not less than 5 mm relative to the stainless steel shell. A plurality of reamer holes 101 are formed in the shell of the hemispherical tool holder 1. The reamer is fixedly connected to one side of the reamer hole 101, and the cantilever end of the reamer extends into the reamer hole 101 and protrudes from the outer spherical wall of the hemispherical tool holder 1.

[0034] Using a relatively inexpensive plastic material to make the hemispherical tool holder 1 can support the reamer, is for one-time use, and avoids cross-infection between patients; moreover, it reduces the material cost and meets the economy of one-time use. For the disposable acetabular reamer of the present invention, a hemispherical tool holder made of plastic material is used to support the reamer, reducing the cost of expensive metal materials and avoiding cross-infection.

[0035] In a specific embodiment of this embodiment, as Figure 1 and Figure 2 shown, the reamer specifically adopts a blade 2. The blade 2 is made of 2Cr13 martensitic stainless steel or 3Cr13 stainless steel, and the thickness of the blade 2 is not greater than 2 mm. The root of the blade 2 is directly injection molded and anchored in the shell material of the hemispherical tool holder 1, and the cantilever end face of the blade 2 is set as a cutting edge face.

[0036] By adopting the direct anchoring method during injection molding, only need to place each blade 2 well, and the installation of the blade 2 is completed while injection molding. Injection molding is more mature and has lower cost compared with machining a stainless steel plate into a hemispherical shape; because it is only used once, the thickness of the blade 2 can be reduced, while improving the cutting performance, the usage amount of stainless steel material is reduced.

[0037] Specifically, as Figure 2 shown, the cantilever end of the blade 2 is an arc plate, and the convex surface of the arc plate faces outward. And inwardly bent flanges 201 are provided at both ends of the blade 2 in the width direction.

[0038] Specifically, as Figure 2 shown, the embedded section of the blade 2 is provided with an anchoring hole 202, and the shell material of the hemispherical tool holder 1 is filled in the anchoring hole 202. The anchoring hole 202 can be a square hole or a round hole.

[0039] By setting the cantilever end of the blade 2 as an arc-shaped plate, the anti-deformation ability during the filing process of the blade 2 is increased. Meanwhile, the setting of the hemmed edge 201 also improves the strength of the blade 2 and reduces the occurrence of hard bending deformation. By providing an anchoring hole 202 in the embedded section of the blade 2, the anchoring strength of the blade 2 is increased, and the situation of the blade coming out from the root will not occur.

[0040] The usage process of the disposable acetabular rasp in this embodiment: During total hip arthroplasty, the surgical operator takes out the disposable acetabular rasp of the present application from the disposable package. The disposable acetabular rasp is clamped to the cross clamping head of a pneumatic drill or an electric drill through the cross head 102, and is inserted into the acetabulum of the patient. The switch is operated to drive the hemispherical tool holder 1 to rotate at a high speed to file and remove the acetabular cartilage until the size requirement is met. At the end of the operation, the disposable acetabular rasp of the present application is disassembled from the cross clamping head and discarded into the medical waste bucket.

[0041] Embodiment 2

[0042] In the above embodiment, not only the inexpensive plastic hemispherical tool holder 1 is discarded once, but also the stainless steel blade 2 is discarded once, resulting in some waste. Therefore, it is necessary to make further improvements. Based on the above Embodiment 1, revisions are made to form this embodiment. As Figures 3 - 5 shown, the file specifically uses the tool block 3, the file hole 101 is a horseshoe-shaped through hole, and a tool groove 103 is recessed and formed on one side of the straight edge of the file hole 101 on the outer wall of the hemispherical tool holder 1. The tool block 3 is installed in the tool groove 103 through screws. The cantilever end of the tool block 3 extends into the file hole 101 and is provided with a cutting edge surface.

[0043] Specifically, the thickness of the tool block 3 is not less than 3 mm, and the thickness of the plastic shell of the hemispherical tool holder 1 is 5 - 8 mm.

[0044] By installing the tool block 3 into the tool groove 103 through screws to act as the cutting element for filing, the detachable tool block 3 is realized. The discarded hemispherical tool holder 1 can have the tool block 3 disassembled for reuse, further improving the economy of the present application. Moreover, the single tool block 3 has no complex structural features, is convenient for cleaning and disinfection, is suitable for repeated use, and will not cause cross-infection.

[0045] In a specific implementation manner of this embodiment, as Figures 3 - 5 shown, a countersunk through hole is provided on the top surface of the tool block 3, and the countersunk screw 4 passes through the countersunk through hole and is threadedly connected to the threaded hole 104 on the bottom surface of the tool groove 103.

[0046] Specifically, as Figure 4 shown, a thickening protrusion 105 is additionally provided on the bottom surface of the hemispherical tool holder 1 at the position of the threaded hole 104.

[0047] By providing the countersunk through holes on the top surface of the cutter block 3, the height of the nut of the countersunk screw 4 can be reduced to avoid interference. By providing the thickening protrusions 105 on the bottom surface at the position of the threaded holes 104, the effective threaded length of the threaded holes 104 can be increased to avoid the situation that the countersunk screw 4 is pulled off.

[0048] In a specific implementation manner of this embodiment, the filing holes 101 are divided into multiple groups according to different latitudes on the hemispherical cutter holder 1. Each group includes a plurality of filing holes 101 evenly distributed in a circumferential manner. This design method follows the hole arrangement form in the applicant's utility model patent CN209059342U. There is a detailed technical introduction in this patent application, which will not be elaborated here.

[0049] Specifically, the installation lengths of the cutter grooves 103 corresponding to the filing holes 101 at different latitudes are different. The installation length of the cutter groove 103 corresponding to the filing hole 101 at a high latitude is greater than that at a low latitude.

[0050] Specifically, as Figure 4 and Figure 5 shown, in all the cutter grooves 103, the distance from the center line of the threaded hole 104 to the straight edge of the horseshoe-shaped filing hole 101 is the same; however, the distance from the positioning bottom edge 1031 behind the cutter groove 103 to the center line of the threaded hole 104 is related to the latitude. The distance at this position of the cutter groove 103 at a low latitude is less than that at a high latitude.

[0051] Specifically, as Figure 4 and Figure 5 shown, the countersunk through holes of the cutter block 3 include waist-shaped holes 301 at the bottom and relief grooves 302 at the upper part. The threaded rod section of the countersunk screw 4 passes through the waist-shaped holes 301, and the nut of the countersunk screw 4 is pressed in the relief grooves 302. The lengths of the cutter blocks 3 corresponding to the filing holes 101 at different latitudes are different. The length of the cutter block 3 corresponding to the filing hole 101 at a high latitude is greater than that at a low latitude.

[0052] Through long-term experience accumulation in the use of the acetabular file by the applicant, it is found that: the filing edges that are most likely to be ground and broken in the existing acetabular file often occur on the filing edges at low latitudes. When the filing edges at low latitudes are severely worn and cannot be used, the whole acetabular file must be replaced with a new one. However, at this time, the filing edges at high latitudes have not been significantly worn and can still be used. Such scrapping will inevitably lead to waste.

[0053] By reasonably setting different lengths of the cutter blocks 3 corresponding to the filing holes 101 at different latitudes, the cutter blocks 3 that are not overly worn at high latitudes can be switched to the installation positions at low latitudes for continued use, thereby increasing the service life of a single cutter block 3. By adapting the waist-shaped holes 301 to the installation lengths of the cutter grooves 103, it can be ensured that by using a common screw method, the cutter block 3 can be adapted to the optimal ejection length state for filing after being switched.

[0054] Embodiment 3

[0055] The present invention also discloses a method for replacing the cutter block of a disposable acetabular reamer. After disassembling the cutter block 3 of the disposable acetabular reamer in the above-mentioned Embodiment 2, the cutter block 3 and the countersunk head screw 4 are first cleaned and then disinfected, and then installed on a new hemispherical tool holder 1 for reuse. Only the original hemispherical tool holder 1 is discarded and treated as medical waste.

[0056] Specifically, when the cutter block 3 is worn, the cutter block 3 on the lowest-latitude reaming hole 101 is discarded, the cutter block 3 at the next higher latitude is transferred to the next latitude for continued use, and a new cutter block 3 is used on the highest-latitude reaming hole 101.

[0057] By rotating the installation position and using the same cutter block 3 multiple times at different latitudes, the working life of a single cutter block 3 is increased, waste is avoided, the economy of the acetabular reamer of the present application is further improved, and the cost of surgical instruments is reduced.

[0058] In summary, the disposable acetabular file of the present invention adopts a relatively cheap plastic material to make a hemispherical tool holder 1, which can play the role of supporting the file, and is disposable, thereby avoiding cross infection between patients; and reduces the material cost, and meets the economy of disposable use. The disposable acetabular file of the present invention adopts a hemispherical tool holder made of plastic material to support the file, which reduces the cost of expensive metal materials and avoids cross infection. In addition, by adopting the direct anchoring method during injection molding, it is only necessary to place each blade 2, and the installation of the blade 2 is completed at the same time of injection molding. Compared with the stainless steel sheet being machined into a hemispherical shape, the injection molding process is mature and the cost is lower; because it only needs to be used once, the thickness of the blade 2 can be reduced, and the cutting performance is improved while reducing the use of stainless steel materials. By setting the cantilever end of the blade 2 as an arc plate, the deformation resistance of the blade 2 during the filing process is increased, and the setting of the folding edge 201 also increases the strength of the blade 2 to prevent hard bending and deformation; by setting the anchor hole 202 in the embedded section of the blade 2, the anchoring strength of the blade 2 is increased, and it will not fall out from the root. The blade block 3 is installed in the blade groove 103 by screws to act as a chip cutting element for filing, so that the blade block 3 can be detachably installed. The blade block 3 can be disassembled and reused when the hemispherical tool holder 1 is abandoned, which further improves the economic efficiency of the present application. Moreover, the single blade block 3 has no complex structural features, is easy to clean and disinfect, is suitable for repeated use, and will not cause cross infection. By providing the countersunk through hole on the top surface of the blade block 3, the nut height of the countersunk screw 4 can be reduced to avoid interference; by providing a thickened protrusion 105 on the bottom surface of the threaded hole 104, the effective thread length of the threaded hole 104 can be increased to avoid the countersunk screw 4 from being pulled off. By reasonably setting the blade block 3 lengths corresponding to the filing holes 101 at different latitudes to be different, the blade block 3 that is not excessively worn at a high latitude can be switched to a low-latitude installation position for continued use, thereby increasing the service life of a single blade block 3. By adapting the waist-shaped hole 301 and the installation length of the knife groove 103, it can be ensured that the knife block 3 can be switched to the optimal ejection length state for filing by using a universal screw method.

[0059] The disposable acetabular rasp blade replacement method of the present invention uses the same blade block 3 multiple times at different latitudes by rotating the installation position, thereby increasing the working life of a single blade block 3, avoiding waste, further improving the economy of the acetabular rasp of the present application, and reducing the cost of surgical instruments.

[0060] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0061] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A disposable acetabular reamer, characterized in that: include: A hemispherical tool holder (1) and a file, wherein the hemispherical tool holder (1) is a hemispherical shell structure formed by plastic injection molding, and a cross head (102) for clamping is integrally formed by injection molding at the bottom of the hemispherical tool holder (1); a plurality of file holes (101) are provided on the shell of the hemispherical tool holder (1), the file is fixedly connected to one side of the file hole (101), and the cantilever end of the file protrudes into the file hole (101) and protrudes from the outer spherical wall of the hemispherical tool holder (1).

2. The disposable acetabular reamer according to claim 1, characterized in that: The file specifically adopts a blade (2), the root of the blade (2) is directly injection-molded and anchored in the shell material of the hemispherical tool holder (1), and the cantilever end surface of the blade (2) is arranged as a cutting edge surface.

3. The disposable acetabular reamer according to claim 2, characterized in that: The cantilever end of the blade (2) is an arc-shaped plate and both ends are provided with inwardly bent edges (201).

4. The disposable acetabular reamer according to claim 2, characterized in that: The embedded section of the blade (2) is provided with an anchor hole (202), and the anchor hole (202) is filled with the shell material of the hemispherical tool holder (1).

5. The disposable acetabular reamer according to claim 1, characterized in that: The file specifically adopts a knife block (3), the file hole (101) is a horseshoe-shaped through hole, the outer wall of the hemispherical tool holder (1) is recessed on one side of the straight edge of the file hole (101) to form a knife groove (103), and the knife block (3) is installed in the knife groove (103) by means of screws.

6. The disposable acetabular reamer according to claim 5, characterized in that: A countersunk through hole is provided on the top surface of the knife block (3), and a countersunk screw (4) passes through the countersunk through hole and is threadedly connected to a threaded hole (104) on the bottom surface of the knife groove (103).

7. The disposable acetabular reamer according to claim 6, characterized in that: The hemispherical tool holder (1) is provided with a thickened protrusion (105) on the bottom surface at the position of the threaded hole (104).

8. The disposable acetabular reamer according to claim 6, characterized in that: The file holes (101) are divided into a plurality of groups according to different latitudes on the hemispherical tool holder (1), and each group includes a plurality of file holes (101) uniformly distributed around the circumference; the installation lengths of the tool grooves (103) corresponding to the file holes (101) at different latitudes are different, and the installation lengths of the tool grooves (103) corresponding to the file holes (101) at high latitudes are greater than those at low latitudes; the countersunk through hole of the tool block (3) includes a waist-shaped hole (301) at the bottom and a clearance groove (302) at the top; the lengths of the tool block (3) corresponding to the file holes (101) at different latitudes are different, and the lengths of the tool block (3) corresponding to the file holes (101) at high latitudes are greater than those at low latitudes.

9. A disposable acetabular rasp tool block replacement method, characterized in that: After the blade block (3) of the disposable acetabular rasp described in claim 8 is disassembled, cleaned and disinfected, and installed in a new hemispherical blade holder (1) for reuse; the original hemispherical blade holder (1) is discarded and treated as medical waste.

10. The disposable acetabular rasp tool block replacement method according to claim 9, characterized in that: When the blade block (3) is worn, the blade block (3) on the file hole (101) at the lowest latitude is discarded, the blade block (3) at a higher latitude is transferred to the next latitude for use, and a new blade block (3) is used on the file hole (101) at the highest latitude.

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