Guiding device

Abstract

The utility model discloses a guiding device. The guiding device comprises a supporting body, a guider and a locking assembly. Wherein a guide channel is formed in the support main body, and the guide channel is configured to be coaxially arranged with a preformed hole of an intramedullary needle on a preset prosthesis when the support main body is mounted on the preset prosthesis. The guider is detachably arranged in the guide channel in a penetrating mode, a guide hole is formed in the guider, and the guide hole and the guide channel are coaxially arranged. The locking assembly is disposed on the support body, and the locking assembly is configured to lock the support body between a predetermined prosthesis and a human skeleton. The guiding device solves the problem that in the prior art, a screw used for locking the intramedullary needle and the femur cannot be accurately arranged in a reserved mounting hole of the intramedullary needle in a penetrating mode, and therefore a prosthesis replacement operation fails.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a guiding device. BACKGROUND

[0002] When a patient needs to perform partial osteotomy due to bone tumor or accidental fracture, a prosthesis is used to replace the cut bone. In order to increase the stability of the connection between the prosthesis and the remaining bone, an intramedullary nail is often used to strengthen the stability. However, since the intramedullary nail is usually in a cylindrical structure, the intramedullary nail may rotate in the medullary cavity. Therefore, a connecting screw is needed between the bone and the intramedullary nail to improve the connection stability of the intramedullary nail and the bone.

[0003] The existing installation method is to determine the screw insertion direction through preoperative planning. During the operation, the screw guide is positioned, and the punch is used to set on the screw positioner to directly drill from the outer surface of the bone. Then, the screw is inserted into the drilled hole and the reserved installation hole on the intramedullary nail to improve the connection stability of the intramedullary nail and the bone. However, when the screw guide is used to drill, the screw guide will deviate at a certain angle under the action of external force, so that the drilled hole is different from the preplanned drilling direction, causing the screw to be unable to be accurately inserted into the reserved installation hole on the intramedullary nail, thereby resulting in failure of the prosthesis replacement operation. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a guiding structure to at least solve the problem that the screw for locking the intramedullary nail and the femur in the prior art cannot be accurately inserted into the reserved installation hole of the intramedullary nail, thereby resulting in failure of the prosthesis replacement operation.

[0005] According to one aspect of the present application, a guiding device is provided, comprising:

[0006] a support body, a guiding channel being formed in the support body, the guiding channel being configured to be coaxially arranged with a reserved hole of an intramedullary nail on a predetermined prosthesis when the support body is installed on the predetermined prosthesis;

[0007] a guide, the guide being detachably set in the guiding channel, a guiding hole being formed in the guide, the guiding hole being coaxially arranged with the guiding channel;

[0008] a locking assembly, the locking assembly being arranged on the support body, the locking assembly being configured to lock the support body between the predetermined prosthesis and a human bone.

[0009] Further, the support body comprises a first support segment and a second support segment, and the locking assembly comprises:

[0010] A first locking part is arranged on the first support segment, and is configured to lock the first support segment on the predetermined prosthesis.

[0011] A second locking part is arranged on the second support segment, and is configured to lock the second support segment on the human body bone.

[0012] Further, a fixing hole is arranged on the first support segment, and the first locking part comprises a locking piece which is arranged in the fixing hole to lock the first support segment on the predetermined prosthesis.

[0013] Further, along the extension direction of the fixing hole, the first support segment comprises a first flat surface and a first arc surface which are oppositely arranged, the locking piece is arranged from the first flat surface to the first arc surface, the peripheral surface of the predetermined prosthesis comprises a second arc surface, and the first arc surface is used to be combined with the second arc surface.

[0014] Further, an assembly hole is arranged on the second support segment, and the second locking part comprises an abutting block and an adjusting piece, the adjusting piece is arranged in the assembly hole, the end of the adjusting piece is connected with the abutting block, and the abutting block is used to abut against the human body bone.

[0015] Further, the adjusting piece comprises an adjusting bolt, the inner wall surface of the assembly hole is provided with a threaded segment which is matched with the adjusting bolt, the adjusting bolt is arranged in the assembly hole, and reciprocally moves along the axis direction of the assembly hole under the action of an external force.

[0016] Further, the surface of the abutting block which is away from the adjusting piece is provided with a third arc surface, the peripheral surface of the human body bone comprises a fourth arc surface, and the third arc surface is used to be combined with the fourth arc surface.

[0017] Further, the abutting block comprises a polyethylene pad.

[0018] Further, the first support segment and the second support segment are arranged in a first direction, and the support body further comprises a flat connecting segment, the first end of the flat connecting segment is perpendicularly connected with the first support segment, and the second end of the flat connecting segment is perpendicularly connected with the second support segment.

[0019] Further, the support body further comprises a cylindrical sleeve, the guide channel is arranged in the cylindrical sleeve, the guide piece comprises a cylindrical barrel which is matched with the cylindrical sleeve, and the cylindrical barrel is arranged in the cylindrical sleeve.

[0020] Compared with the prior art, the application sets a support body, the support body is provided with a guide channel coaxially arranged with a reserved hole on the intramedullary needle, the support body is installed between the predetermined prosthesis and the human body bone through the locking assembly, so that the support body, the human body bone and the predetermined prosthesis do not move relatively. The guide device is detachably installed in the guide channel, and the guide device has a guide hole coaxially arranged with the guide channel. This means that when the hole is opened on the outside of the human body bone, the guide device only needs to be fixed in the guide channel, and since the guide channel and the guide hole are coaxially arranged with the reserved hole on the intramedullary needle, when the punch is used to punch the outer surface of the human body bone through the guide hole, the reserved hole of the intramedullary needle can be accurately aligned. At the same time, due to the effect of the support body and the locking assembly during punching, the support body, the human body bone and the predetermined prosthesis are relatively stationary, and the guide device will not be disturbed by external force, causing the guide device to deviate. Therefore, the hole opening direction is consistent with the preoperative planning punching direction, so that the screw can be arranged in the reserved hole on the intramedullary needle. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the application, constitute a part of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0022] Figure 1 Assembly view of the guide device disclosed in the application;

[0023] Figure 2 Perspective view of the assembly of the guide device disclosed in the application;

[0024] Figure 3 Structure schematic view of the guide device, the predetermined prosthesis and the intramedullary needle disclosed in the application;

[0025] Figure 4 Exploded structure schematic view of the guide device, the predetermined prosthesis and the intramedullary needle disclosed in the application;

[0026] Figure 5 Exploded structure schematic view of the second locking part disclosed in the application.

[0027] Among them, the above drawings include the following reference signs:

[0028] 10, support body; 11, first support section; 12, second support section; 13, straight connecting section; 14, cylindrical sleeve; 21, first locking part; 22, second locking part; 30, guide; 40, predetermined prosthesis; 41, second arc surface; 50, human bone; 51, fourth arc surface; 60, intramedullary nail; 70, screw; 111, fixing hole; 121, assembling hole; 141, guide channel; 211, locking piece; 221, adjusting piece; 222, abutting block; 301, guide hole; 1111, first arc surface; 2211, clamping groove; 2221, third arc surface; 2222, clamping convex. DETAILED DESCRIPTION

[0029] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should be understood that, when the term "comprising" and / or "including" is used in the specification, it means that the features, steps, operations, devices, components and / or combinations thereof are present.

[0031] The relative arrangement of the components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application, unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. Techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized specification, if appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] Referring to Figures 1 to 3 As shown, according to the embodiments of the present application, a guide device is provided, which comprises a support body 10, a guide 30 and a locking assembly.

[0033] The support body 10 is provided with a guide channel 141, which is coaxially arranged with the reserved hole of the intramedullary needle 60 when the support body 10 is installed on the predetermined prosthesis 40. The guide 30 is detachably arranged in the guide channel 141, and the guide 30 is provided with a guide hole 301 coaxially arranged with the guide channel 141. The locking assembly is arranged on the support body 10, and the locking assembly is configured to lock the support body 10 between the predetermined prosthesis 40 and the human bone 50.

[0034] Specifically, during the operation, first, the support body 10 is locked on the predetermined position of the predetermined prosthesis 40 and the human bone 50 by the locking assembly, at this time, the guide channel 141 is coaxially arranged with the intramedullary needle 60. Then, the guide 30 is installed in the guide channel 141, so that the guide hole 301 of the guide 30 is coaxially arranged with the guide channel 141. After that, the punch (not shown in the figure) punches the outer surface of the human bone 50 through the guide hole 301, and after the punching is completed, the guide 30 is removed, and the screw 70 is screwed along the hole on the outer surface of the human bone 50, so that the screw 70 can be arranged in the reserved hole of the intramedullary needle 60.

[0035] The support body 10 is provided with the guide channel 141 coaxially arranged with the reserved hole of the intramedullary needle 60, and the support body 10 is installed between the predetermined prosthesis 40 and the human bone 50 by the locking assembly, so that the support body 10, the human bone 50 and the predetermined prosthesis 40 do not move relative to each other. The guide 30 is detachably installed in the guide channel 141, and the guide 30 has the guide hole 301 coaxially arranged with the guide channel 141. This means that when the hole is punched on the outer side of the human bone 50, the guide 30 only needs to be fixed in the guide channel 141. Since the guide channel 141 and the guide hole 301 are coaxially arranged with the reserved hole of the intramedullary needle 60, when the punch is used to punch the outer surface of the human bone 50 through the guide hole 301, the reserved hole of the intramedullary needle 60 can be accurately aligned. At the same time, the support body 10, the human bone 50 and the predetermined prosthesis 40 are relatively static during the punching due to the effect of the support body 10 and the locking assembly, and the guide 30 will not be disturbed by external force, causing the guide 30 to deviate. Therefore, the hole direction is consistent with the preoperative planning punching direction, so that the screw 70 can be arranged in the reserved hole of the intramedullary needle 60.

[0036] Further, the support body 10 comprises a first support section 11 and a second support section 12, and the locking assembly comprises a first locking part 21 and a second locking part 22. The first locking part 21 is arranged on the first support section 11 and is configured to lock the first support section 11 on the predetermined prosthesis 40. The second locking part 22 is arranged on the second support section 12 and is configured to lock the second support section 12 on the human bone 50.

[0037] Specifically, the first support section 11 is locked on the predetermined prosthesis 40 by the first locking part 21 to exert a support action on the first support section 11, and the second support section 12 is locked on the human bone 50 by the second locking part 22 to exert a support action on the second support section 12, thereby enhancing the connection strength between the support body 10, the human bone 50 and the predetermined prosthesis 40, and avoiding relative movement between any one of the support body 10, the human bone 50 and the predetermined prosthesis 40 and other components under external force.

[0038] Further, the first support section 11 is provided with a fixing hole 111, and the first locking part 21 comprises a locking piece 211 which is arranged in the fixing hole 111 to lock the first support section 11 on the predetermined prosthesis 40. Specifically, the locking piece 211 is a bolt which is inserted into the fixing hole 111 and arranged in the predetermined prosthesis 40 to lock the first support section 11 on the predetermined prosthesis 40.

[0039] In addition, when the first support section 11 is connected to the predetermined prosthesis 40 by the locking piece 211, if the contact area between the first support section 11 and the predetermined prosthesis 40 is small, the first support section 11 and the predetermined prosthesis 40 may relatively shake under external force, thereby causing misalignment between the axis of the guide hole 301 and the axis of the reserved hole of the intramedullary nail 60. In order to solve the above problem, in the embodiment, along the extension direction of the fixing hole 111, the first support section 11 comprises a first flat surface and a first arc surface 1111 which are oppositely arranged, the locking piece 211 penetrates the first arc surface 1111 from the first flat surface, and the peripheral surface of the predetermined prosthesis 40 comprises a second arc surface, and the first arc surface 1111 is used to abut against the second arc surface. That is, by arranging the first arc surface 1111 on the first support section 11, the contact area between the first support section 11 and the predetermined prosthesis 40 is increased, thereby improving the connection strength between the first support section 11 and the predetermined prosthesis 40. In the embodiment, since the locking piece 211 is a bolt, the surface opposite to the first arc surface 1111 is arranged as the first flat surface to ensure that the bolt and the first flat surface have good adaptation and reduce the wear of the bolt on the first support section 11.

[0040] To avoid excessive impact on the human skeleton 50 during the installation of the support body 10, in this embodiment, the second support section 12 is provided with an assembly hole 121. The second locking part 22 includes a clamping block 222 and an adjusting member 221. The adjusting member 221 passes through the assembly hole 121, and its end is connected to the clamping block 222. The clamping block 222 is used to clamp the human skeleton 50.

[0041] Specifically, by operating the adjusting member 221, the adjusting member 221 applies an external force to the abutting block 222, and moves the abutting block 222 in a direction closer to or further away from the human skeleton 50. Ultimately, without damaging the human skeleton 50, the abutting block 222 is pressed against the human skeleton 50 to improve the stability between the second support segment 12 and the human skeleton 50.

[0042] In some specific embodiments, the adjusting member 221 includes an adjusting bolt, and the inner wall surface of the mounting hole 121 is provided with a threaded section (not shown in the figure) adapted to the adjusting bolt. The adjusting bolt passes through the mounting hole 121 and reciprocates along the axial direction of the mounting hole 121 under the action of external force.

[0043] In this embodiment, when the adjusting bolt is rotated in the locking direction, it moves towards the direction close to the human skeleton 50, so that the abutment block 222 approaches and abuts against the human skeleton 50. Simultaneously, the threaded section limits the movement of the adjusting bolt, preventing it from moving due to the reaction force of the abutment block 222. When the abutment block 222 exerts excessive pressure on the human skeleton 50, the adjusting bolt is rotated in the unlocking direction, causing the abutment block 222 to move away from the human skeleton 50, thereby reducing the pressure exerted by the abutment block 222 on the human skeleton 50. In this embodiment, to avoid damaging the human skeleton 50, each adjustment of the adjusting bolt is a fine-tuning.

[0044] As attached Figure 5 As shown, the adjusting bolt and the clamping block 222 are connected by a latching protrusion 2222 and a latching groove 2211, respectively. The latching protrusion 2222 is provided on one of the adjusting bolt and the clamping block 222, and the latching groove 2211 is provided on the other of the adjusting bolt and the clamping block 222. The assembly of the latching protrusion 2222 and the latching groove 2211 makes the structure of the second locking part 22 simple and easy to disassemble.

[0045] Furthermore, the side of the abutting block 222 that is away from the adjusting member 221 is set as a third arc-shaped surface 2221, and the peripheral side of the human skeleton 50 includes a fourth arc-shaped surface 51. The third arc-shaped surface 2221 is used to fit against the fourth arc-shaped surface 51.

[0046] Similarly, the third arc surface 2221 is arranged to increase the contact area between the abutting block 222 and the fourth arc surface 51 on the human bone 50, thereby preventing the abutting block 222 from shaking relative to the human bone 50 when subjected to external force.

[0047] Further, the abutting block 222 comprises a polyethylene pad. In the embodiment, the polyethylene pad has a certain elasticity, which can avoid rigid interference between the abutting block 222 and the human bone 50, so as to prevent damage to the human bone 50. At the same time, the polyethylene pad has a relatively low cost, which can reduce the overall manufacturing cost of the guiding device. In a preferred embodiment, the abutting block 222 is made of an ultra-high molecular weight polyethylene pad, which has a certain affinity with the human bone 50 and does not affect the human bone 50.

[0048] In a specific embodiment, as shown in FIG. 1, the first support section 11 and the second support section 12 are arranged in parallel and staggered in the first direction (e.g., the Z direction in FIG. 1). Figure 1 Figure 1 In a specific embodiment, as shown in FIG. 1, the first support section 11 and the second support section 12 are arranged in parallel and staggered in the first direction (e.g., the Z direction in FIG. 1).

[0049] In the embodiment, the predetermined prosthesis 40 is arranged in a cylindrical shape. To ensure the firmness of the connection between the support body 10 and the predetermined prosthesis 40, the first support section 11 is arranged as a flat section that is adapted to the predetermined prosthesis 40. At the same time, since the projection plane of the predetermined prosthesis 40 on the human bone 50 is staggered, i.e., the projection plane of the predetermined prosthesis 40 is contained in the projection plane of the human bone 50. Therefore, in the embodiment, the flat connection section 13 is arranged to provide a certain clearance between the support body 10 and the human bone 50, so as to avoid interference between the support body 10 and the human bone 50. In addition, to avoid the second support section 12 being arranged at an angle with the flat connection section 13, which may result in a certain gap between the abutting block 222 on the second support section 12 and the human bone 50 when the abutting block 222 abuts against the human bone 50, thereby reducing the abutting effect of the abutting block 222 on the human bone 50 and causing the second support section 12 to shake when subjected to external force. In the embodiment, the first support section 11, the flat connection section 13, and the second support section 12 are integrally formed.

[0050] ​In addition, the shape of the support body 10 in this embodiment includes a plurality of shapes, which can be customized by a 3D printer according to the preoperative planning of the osteotomy position, the installation position of the guide device, and the opening position on the human bone 50. At the same time, the number and position of the locking members 211, the fixing holes 111, and the abutting blocks 222 can be customized according to different needs. For example, when the replaced bone is large, the locking members 211, the fixing holes 111, and the abutting blocks 222 can all be provided in multiple numbers. In addition, in this embodiment, the support body 10 includes a titanium alloy support body.

[0051] It is worth mentioning that the first arc surface 1111 on the first support section 11 can also be matched and customized according to the shape of the second arc surface 41 of the predetermined prosthesis 40. For example, when the second arc surface 41 is a convex arc surface, the first arc surface 1111 can be provided as a concave arc surface matched therewith, so that the first arc surface 1111 and the second arc surface 41 can be completely fitted. Similarly, the third arc surface 2221 on the abutting block 222 is designed in the same way.

[0052] As shown in the accompanying drawings, Figure 4 The support body 10 further includes a cylindrical sleeve 14, and the guide channel 141 is formed in the cylindrical sleeve 14. The guide 30 includes a cylindrical barrel that is adapted to the cylindrical sleeve 14, and the cylindrical barrel is arranged in the cylindrical sleeve 14.

[0053] Specifically, the arrangement of the cylindrical barrel and the cylindrical sleeve 14 can increase the contact area of the support body 10 and the guide 30. That is, when the guide 30 is installed in the guide channel 141, the guide 30 can be prevented from rotating in the guide channel 141 due to the small contact area between the guide channel 141 and the guide 30 under the action of an external force, so that the direction of the guide hole 301 deviates from the reserved hole of the intramedullary nail 60. In this embodiment, the cylindrical sleeve 14 is arranged integrally with the support body 10.

[0054] In order to make the guide device have wider adaptability, that is, one guide device can be adapted to surgeries in different situations without personalized customization for each patient, thereby reducing the cost of surgery. In this embodiment, the cylindrical sleeve 14 is arranged separately from the support body 10, the support body 10 is provided with a plurality of adjustment holes along the extension direction thereof, the cylindrical sleeve 14 is detachably and rotatably arranged in one of the adjustment holes, and a third locking portion is arranged in the adjustment cavity, which can lock the cylindrical sleeve 14 in the adjustment hole. This means that the position of the cylindrical sleeve 14 on the support body 10 and the installation angle of the cylindrical sleeve 14 in the adjustment hole can be adjusted, so that the guide channel 141 on the cylindrical sleeve 14 can be coaxial with the reserved hole of the intramedullary nail 60, thereby ensuring that the trephine can accurately open a hole.

[0055] In summary, before the prosthesis replacement surgery, firstly, the patient's lesion is modeled and analyzed by simulation technology, and the preformed hole on the predetermined prosthesis 40 and intramedullary needle 60 and the installation position of the guide device are determined according to the analysis results, and the 3D printer is used to print and manufacture the predetermined prosthesis 40 and the guide device. Subsequently, during the surgery, the guide device is installed on the preoperatively planned installation position, and the guide device is locked by the locking assembly, so that the guide channel 141 on the guide device is coaxially arranged with the preformed hole of the intramedullary needle 60. Then, the puncher and the guide device 30 are used to punch the human bone 50, so as to ensure that the hole formed on the human bone 50 is coaxially arranged with the preformed hole of the intramedullary needle 60, and the screw 70 can be installed in the preformed hole of the intramedullary needle 60.

[0056] For the convenience of description, spatial relative terms such as "above", "upper", "top surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0057] In addition, it should be noted that the use of the words "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0058] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A guide device, characterized in that The application relates to a support body (10) provided with a guide channel (141) configured to be coaxially arranged with a reserved hole of an intramedullary needle (60) on a predetermined prosthesis (40) when the support body (10) is mounted on the predetermined prosthesis (40); a guide (30) detachably arranged in the guide channel (141) and provided with a guide hole (301) coaxially arranged with the guide channel (141); and a locking assembly arranged on the support body (10) and configured to lock the support body (10) between the predetermined prosthesis (40) and a human bone (50). The support body (10) comprises a first support section (11) and a second support section (12), and the locking assembly comprises: a first locking part (21) arranged on the first support section (11) and configured to lock the first support section (11) on the predetermined prosthesis (40); and a second locking part (22) arranged on the second support section (12) and configured to lock the second support section (12) on the human bone (50).

2. The guide device of claim 1, wherein, The first support section (11) is provided with a fixing hole (111), and the first locking part (21) comprises a locking piece (211) arranged in the fixing hole (111) to lock the first support section (11) on the predetermined prosthesis (40). In the extension direction of the fixing hole (111), the first support section (11) comprises a first flat surface and a first arc-shaped surface (1111) arranged oppositely, the locking piece (211) penetrates through the first arc-shaped surface (1111) from the first flat surface, the peripheral surface of the predetermined prosthesis (40) comprises a second arc surface, and the first arc-shaped surface (1111) is used for abutting the second arc surface. The second support section (12) is provided with an assembly hole (121), the second locking part (22) comprises an abutting block (222) and an adjusting piece (221), the adjusting piece (221) penetrates through the assembly hole (121), the end of the adjusting piece (221) is connected with the abutting block (222), and the abutting block (222) is used for abutting the human bone (50).

3. The guide device of claim 2, wherein, The adjusting piece (221) comprises an adjusting bolt, the inner wall surface of the assembly hole (121) is provided with a threaded section matched with the adjusting bolt, the adjusting bolt penetrates through the assembly hole (121) and reciprocates along the axis direction of the assembly hole (121) under the action of an external force.

4. The guide of claim 3, wherein, ​ 5. The guide of claim 2, wherein, ​ 6. The guide of claim 5, wherein, ​ 7. The guide of claim 5, wherein, The side of the abutting block (222) away from the adjusting member (221) is provided with a third arc-shaped surface (2221), and the peripheral surface of the human body bone (50) comprises a fourth arc-shaped surface (51), and the third arc-shaped surface (2221) is used for abutting with the fourth arc-shaped surface (51).

8. The guide device of any one of claims 5 to 7, wherein, The abutting block (222) comprises a polyethylene pad.

9. The guide device of any one of claims 2 to 7, wherein, The first support section (11) and the second support section (12) are arranged in a first direction and are parallel to each other, and the support body (10) further comprises a straight connecting section (13), a first end of the straight connecting section (13) is connected with the first support section (11) perpendicularly, and a second end of the straight connecting section (13) is connected with the second support section (12) perpendicularly.

10. The guide device of any one of claims 1 to 7, wherein, The support body (10) further comprises a cylindrical sleeve (14), the guide channel (141) is arranged in the cylindrical sleeve (14), the guide device (30) comprises a cylindrical barrel which is adapted to the cylindrical sleeve (14), and the cylindrical barrel is arranged in the cylindrical sleeve (14).

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