Orthopedic prosthesis implantation auxiliary device and control method thereof

Abstract

The present application relates to the technical field of orthopedic prostheses, and provides an orthopedic prosthesis implantation auxiliary device and a control method thereof, wherein the orthopedic prosthesis implantation auxiliary device comprises: a first fixing portion, wherein the first fixing portion comprises a plurality of metatarsal fixing devices, wherein the metatarsal fixing devices are used to fix the metatarsals; a second fixing portion, which is rotatably arranged at one end of the first fixing portion around a first axis, wherein the second fixing portion is used to clamp and move the proximal phalanx; and a third fixing portion, which is movably arranged at the other end of the first fixing portion, wherein the third fixing portion is used to fix the hind part of the foot. The orthopedic prosthesis implantation auxiliary device provided in the present application can improve the technical problem existing in the related art that when an orthopedic prosthesis is implanted at the metatarsophalangeal joint, each foot bone may move, resulting in a deviation in the implantation position of the prosthesis, thereby affecting the implantation effect of the prosthesis.

Description

Technical Field

[0001] The present application relates to the technical field of orthopedic prosthesis, and in particular to an orthopedic prosthesis implantation auxiliary device and a control method thereof. Background Art

[0002] In the related art, when the metatarsophalangeal joint of the foot is severely impaired due to severe osteoarthritis, traumatic arthritis or other reasons, artificial joint replacement surgery is required to implant an orthopedic prosthesis at the metatarsophalangeal joint (the connecting joint between the metatarsal bone and the proximal phalanx) for treatment. During the operation, the various bones of the foot may move, causing deviation in the implantation position of the prosthesis, thereby affecting the implantation effect. Summary of the invention

[0003] The embodiment of the present application provides an orthopedic prosthesis implantation auxiliary device and a control method thereof, which can improve the technical problem existing in the related art that when an orthopedic prosthesis is implanted at the metatarsophalangeal joint, the various foot bones may move, causing deviation in the prosthesis implantation position, thereby affecting the prosthesis implantation effect.

[0004] In a first aspect, an embodiment of the present application provides an orthopedic prosthesis implantation assisting device, comprising:

[0005] A first fixing part, the first fixing part comprising a plurality of metatarsal fixing devices, the metatarsal fixing devices being used to fix the metatarsal bones;

[0006] a second fixing portion, rotatably disposed on one end of the first fixing portion about a first axis, the first axis being located on a contact surface between the first fixing portion and the second fixing portion and being parallel to a contact surface between the first fixing portion and the foot, the second fixing portion being used to clamp and move the proximal phalanx, and a contact surface between the second fixing portion and the foot being in contact with the first fixing portion without rotating being in the same plane as a contact surface between the first fixing portion and the foot; and

[0007] The third fixing part is movably arranged at the other end of the first fixing part, and the third fixing part is used to fix the rear part of the foot. The contact surface between the third fixing part and the foot and the contact surface between the first fixing part and the foot are in the same plane.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] The orthopedic prosthesis implantation auxiliary device provided in the embodiment of the present application fixes the metatarsal bones by the first fixing part, so as to prevent the metatarsal-phalangeal joint from being affected by other metatarsal bones during the operation. The proximal phalanx is clamped and moved by the second fixing part, so that the proximal phalanx, the middle phalanx connected to the proximal phalanx, and the distal phalanx connected to the middle phalanx can be perpendicular to the metatarsal bones to expose the bone cross-sections of the metatarsal bones and the proximal phalanx constituting the metatarsal-phalangeal joint, thereby facilitating the implantation of the orthopedic prosthesis. The orthopedic prosthesis implantation auxiliary device is fixed to the foot of the patient through the third fixing part, so as to prevent the relative displacement between the orthopedic prosthesis implantation auxiliary device and the foot of the patient during the operation, resulting in deviation of the implantation position of the orthopedic prosthesis.

[0010] In some embodiments, the first fixing portion further comprises:

[0011] A first fixing plate, wherein a plurality of fixing grooves recessed into the first fixing plate are formed on both sides of the first fixing plate, and a contact surface of the first fixing plate in contact with the foot and a contact surface of the second fixing portion in contact with the foot when the second fixing portion does not rotate are in the same plane; and

[0012] a rotating connector, one end of which is rotatably connected to a side of the first fixing plate close to the second fixing portion, and the other end of which is connected to the second fixing portion, and the rotating connector is used to enable the second fixing portion to rotate relative to the first fixing plate so as to expose bone cross sections of the metatarsal bones and proximal phalanges constituting the metatarsophalangeal joint;

[0013] Wherein, the metatarsal fixation device is partially located in the fixation groove, and the metatarsal fixation device can approach or move away from the first fixation plate along the depth direction of the fixation groove.

[0014] In some embodiments, the metatarsal fixation device comprises:

[0015] a first connecting mechanism, which is translationally and rotatably disposed on the first fixing plate and is partially located in the fixing groove, and the first connecting mechanism can approach or move away from the first fixing plate along a depth direction of the fixing groove; and

[0016] The first fixing mechanism is arranged on the first connecting mechanism in a liftable and rotatable manner, and the first fixing mechanism is used to fix the metatarsal.

[0017] In some embodiments, the first connection mechanism comprises:

[0018] A first connecting member is disposed on the first fixing plate in a translationally movable manner and is partially located in the fixing groove, and the first connecting member can approach or move away from the first fixing plate along a depth direction of the fixing groove;

[0019] a rotating mechanism, rotatably disposed on an end of the first connecting member away from the first fixing plate; and

[0020] Two second connecting members are arranged on the rotating mechanism and are respectively located on two sides of the rotating mechanism along the diameter direction of the rotating mechanism;

[0021] Wherein, the first fixing mechanism can be raised and lowered along the height direction of the second connecting member and can be rotatably arranged between the two second connecting members.

[0022] In some embodiments, the rotating mechanism comprises:

[0023] A shell, arranged on one end of the first connecting member away from the first fixing plate, the shell has a rotation accommodating space inside, two rotation through grooves penetrating one side of the shell and connected to the rotation accommodating space are provided on a side of the shell close to the first fixing mechanism, and a plurality of inner wall grooves are provided on an inner wall of a side of the shell away from the first fixing mechanism;

[0024] A rotating member, part of which is located in the rotating accommodation space, and the rotating member is arranged on the housing in a translationally and rotatably manner, and the rotating member can approach the housing or move away from the housing;

[0025] a rotating platform, located in the rotating accommodation space and connected to the portion of the rotating member located in the rotating accommodation space, wherein a side of the rotating platform away from the first fixing mechanism is provided with a plurality of rotating protrusions corresponding to the inner wall grooves, and the rotating protrusions can be completely located in the inner wall grooves; and

[0026] an elastic member, located in the rotation accommodating space, one end of the elastic member being connected to the shell, and the other end of the elastic member being connected to the rotating platform, the elastic member being used to make the rotating platform contact the shell so that the rotating protrusion is completely located in the inner wall groove;

[0027] Among them, the two second connecting members are partially located in the rotating accommodating space and are arranged on the rotating table, and the two second connecting members are respectively located on both sides of the rotating table along the diameter direction of the rotating table, and the two second connecting members respectively pass through the two rotating through grooves, and the second connecting members can move along the notch direction of the rotating through groove.

[0028] In some embodiments, the first fixing mechanism comprises:

[0029] a first fixing member, movable along the height direction of the second connecting member and rotatably disposed on the two second connecting members and located between the two second connecting members; and

[0030] The second fixing member is telescopically arranged on the first fixing member and is used for fixing the metatarsal bone.

[0031] In some embodiments, a plurality of connection holes are formed on the second connection member along the height direction of the second connection member, and the first fixing member includes:

[0032] A fixed shell is movably disposed on the second connecting member, wherein a first accommodation space, a second accommodation space and a third accommodation space are formed in the fixed shell, and the first accommodation space is respectively connected with the second accommodation space and the third accommodation space;

[0033] A rotating wheel, located in the first accommodating space and rotatably disposed on the fixed shell;

[0034] Two fixing bars are movably located partially in the second accommodating space and the third accommodating space respectively and meshed with the rotating wheel, and one end of the fixing bar away from the rotating wheel has a fixing protrusion corresponding to the connecting hole; and

[0035] a transmission member rotatably disposed on the fixed shell and partially located in the first accommodation space, wherein the portion of the transmission member located in the first accommodation space is connected to the rotating wheel;

[0036] Wherein, the rotating wheel can drive the two fixing bars meshed with the rotating wheel to move closer to each other or away from each other so that the fixing protrusion does not pass through the connecting hole or passes through the connecting hole.

[0037] In some embodiments, the second fixing member comprises:

[0038] A fixing block, arranged on the fixing shell, the fixing block having a fixing through hole;

[0039] a rotating nut rotatably disposed on the fixed block, the rotating nut having a rotating through hole, the rotating through hole having an internal thread, the rotating through hole being coaxial with the fixed through hole; and

[0040] A fixing rod is movably disposed on the fixing block along the depth direction of the fixing through hole and is partially located in the fixing through hole and the rotating through hole, and the fixing rod has an external thread corresponding to the internal thread of the rotating through hole;

[0041] The rotating nut is used to drive the fixing rod to move closer to or away from the metatarsal bone, so as to fix the metatarsal bone through the fixing rods of the plurality of metatarsal fixing devices.

[0042] In some embodiments, the second fixing portion includes:

[0043] a second fixing plate, rotatably disposed on the first fixing plate around the first axis and connected to the rotating connector, a moving slot being provided on the second fixing plate, a contact surface of the second fixing plate in contact with the foot when the second fixing plate is not rotating and a contact surface of the first fixing plate in contact with the foot being in the same plane, and the second fixing plate being able to expose bone cross sections of the metatarsal bones and proximal phalanges constituting the metatarsophalangeal joint when the second fixing plate is rotating; and

[0044] The phalange fixing device is movably arranged on the second fixing plate and is partially located in the movable groove. The phalange fixing device can move along the notch direction of the movable groove. The phalange fixing device is used to clamp and move the proximal phalange.

[0045] In some embodiments, the phalangeal fixation device comprises:

[0046] A first fixed connection member is movably disposed on the second fixed plate and is partially located in the movable groove, and the first fixed connection member can move along the notch direction of the movable groove;

[0047] A second fixed connection member, disposed on an end of the first fixed connection member close to the foot; and

[0048] The second fixing mechanism is arranged on the second fixing connecting member, and the second fixing mechanism is used for clamping the proximal phalanx.

[0049] In some embodiments, the second fixing mechanism comprises:

[0050] A plurality of positioning rods are rotatably disposed on the second fixed connector about a second axis, wherein the second axis is a line connecting the center points of the plurality of positioning rods disposed on the second fixed connector, and the two ends of the positioning rods can be moved closer to or farther from the two ends of the adjacent positioning rods; and

[0051] A plurality of second fixing rods are movably arranged on the positioning rod, and every two of the second fixing rods correspond to one positioning rod. The two second fixing rods corresponding to the positioning rod can move closer to or farther away from each other along the length direction of the positioning rod to clamp the proximal phalanx.

[0052] In some embodiments, the third fixing portion includes:

[0053] a third fixing plate, wherein a contact surface of the third fixing plate in contact with the foot and a contact surface of the first fixing plate in contact with the foot are in the same plane, and the third fixing plate has a receiving groove, and the receiving groove is used to partially receive the rear part of the foot;

[0054] a moving rod, one end of which is connected to the first fixing plate, the other end of which is connected to the third fixing plate, and the third fixing plate can move closer to or farther from the first fixing plate along the moving rod; and

[0055] A plurality of rear foot fixing devices are movably arranged on both sides of the third fixing plate, respectively, and the rear foot fixing devices are used to contact with and fix the rear foot.

[0056] In a second aspect, an embodiment of the present application provides a method for controlling an orthopedic prosthesis implant assisting device, comprising:

[0057] The sole of the foot is brought into contact with the first fixing part, and the positions of the second fixing part and the third fixing part are adjusted so that the second fixing part fixes the proximal phalanx, and the side of the third fixing part away from the first fixing part contacts the rear of the foot, so that the foot is fixed in position with the orthopedic prosthesis implantation auxiliary device;

[0058] The metatarsal fixation device is used to adjust and fix the position of the metatarsal bones so that the metatarsophalangeal joints that need to be implanted with orthopedic prostheses will not be affected by other metatarsal bones during the operation;

[0059] The second fixing part is rotated about the first axis to separate the proximal phalanx fixed on the second fixing part from the corresponding metatarsal bone so as to expose the bone cross section to facilitate the implantation of an orthopedic prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0061] Figure 1 A schematic diagram of the structure of an orthopedic prosthesis implant assisting device provided in an embodiment of the present application;

[0062] Figure 2 for Figure 1 The schematic diagram of the structure of the orthopedic prosthesis implantation auxiliary device shown is viewed from above;

[0063] Figure 3 for Figure 1 A schematic diagram of the structure of the metatarsal fixation device shown in ;

[0064] Figure 4 for Figure 3 A cross-sectional structural schematic diagram of the rotating mechanism shown in ;

[0065] Figure 5for Figure 3 A schematic structural diagram of the first fixing mechanism shown in ;

[0066] Figure 6 for Figure 5 A front structural schematic diagram of the first fixing member shown in ;

[0067] Figure 7 for Figure 5 A rear structural schematic diagram of the first fixing member shown in ;

[0068] Figure 8 for Figure 1 Schematic diagram of the structure of the phalange fixation device shown in .

[0069] Among them, the reference numerals in the figure are:

[0070] 100. Orthopedic prosthesis implantation auxiliary device; 10. First fixing part; 11. Metatarsal fixing device; 111. First connecting mechanism; 1111. First connecting member; 1112. Rotating mechanism; 11121. Shell; 11122. Rotating member; 11123. Rotating table; 11124. Elastic member; 1113. Second connecting member; 112. First fixing mechanism; 1121. First fixing member; 11211. Fixed shell; 11212. Rotating wheel; 11213. Fixed bar; 11214. Transmission member; 1122, second fixing member; 11221, fixing block; 11222, rotating nut; 11223, fixing rod; 12, first fixing plate; 13, rotating connecting member; 20, second fixing part; 21, second fixing plate; 22, toe bone fixing device; 221, first fixing connecting member; 222, second fixing connecting member; 223, second fixing mechanism; 2231, positioning rod; 2232, second fixing rod; 30, third fixing part; 31, third fixing plate; 32, moving rod; 33, hindfoot fixing device. DETAILED DESCRIPTION

[0071] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0073] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0074] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0076] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0077] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0078] In the related art, when the metatarsophalangeal joint of the sole of the foot is severely impaired in joint function due to severe osteoarthritis, traumatic arthritis or other reasons, artificial joint replacement surgery is required to implant an orthopedic prosthesis at the metatarsophalangeal joint (the connecting joint between the metatarsal bone and the proximal phalanx) for treatment.

[0079] During the operation, the various bones of the foot may move, causing deviation in the position of the prosthesis implant, thus affecting the effect of the prosthesis implant.

[0080] Based on this, in order to improve the technical problem existing in the related art that when an orthopedic prosthesis is implanted at the metatarsophalangeal joint, the various foot bones may move, resulting in a deviation in the implantation position of the prosthesis, thereby affecting the implantation effect of the prosthesis, the embodiments of the present application provide the following solution.

[0081] Please also read Figure 1 and Figure 2 The embodiment of the present application provides an orthopedic prosthesis implantation auxiliary device 100, which includes a first fixing portion 10, a second fixing portion 20 and a third fixing portion 30, wherein:

[0082] The first fixing portion 10 includes a plurality of metatarsal fixing devices 11 , and the metatarsal fixing devices 11 are used to fix the metatarsals.

[0083] The second fixing part 20 is rotatably arranged at one end of the first fixing part 10 around a first axis, the first axis is located on the contact surface between the first fixing part 10 and the second fixing part 20 and is parallel to the contact surface between the first fixing part 10 and the foot, the second fixing part 20 is used to clamp and move the proximal phalanx, and the contact surface between the second fixing part 20 and the foot without rotation and the contact surface between the first fixing part 10 and the foot are in the same plane.

[0084] The third fixing part 30 is movably disposed at the other end of the first fixing part 10 and is used to fix the rear of the foot. The contact surface between the third fixing part 30 and the foot and the contact surface between the first fixing part 10 and the foot are in the same plane.

[0085] It can be understood that the first fixing part 10 is a device that can fix the metatarsal to prevent the metatarsal from affecting the surgical process. The metatarsal fixing device 11 is a device that can support and move the metatarsal. For example, the metatarsal fixing device 11 may include a supporting mechanism and a moving mechanism, etc., but is not limited to this. Among them, the supporting mechanism is a mechanism that can contact the metatarsal. For example, the supporting mechanism can be a hydraulic rod, a telescopic rod, etc., but is not limited to this. The moving mechanism is a mechanism that can drive the supporting mechanism to move closer to or away from the foot of the patient. For example, the moving mechanism can be a crank slider mechanism, a hydraulic cylinder, etc., but is not limited to this.

[0086] The second fixing part 20 is a device that can clamp and move the proximal phalanx so that the proximal phalanx, the middle phalanx connected to the proximal phalanx, and the distal phalanx connected to the middle phalanx can be perpendicular to the metatarsal bones to expose the bone cross-sections of the metatarsal bones and the proximal phalanx constituting the metatarsophalangeal joint. For example, the second fixing part 20 may include a clamping mechanism and a rotating mechanism, etc., but not limited thereto. Among them, the clamping mechanism may be a multi-finger mechanical gripper, a connecting rod cross-type clamping mechanism, etc., but not limited thereto. The rotating mechanism may be a device that can drive the clamping mechanism to rotate so that the bone cross-sections of the metatarsal bones and the proximal phalanx constituting the metatarsophalangeal joint are exposed. For example, the rotating mechanism may be a hinge, etc., but not limited thereto.

[0087] The third fixing part 30 is a device capable of fixing the rear part of the foot. For example, the third fixing part 30 may include a fixing plate and a fixing member, but is not limited thereto. The fixing plate is a plate-like structure, and the fixing plate is used to contact the rear part of the foot. For example, the fixing plate may be an aluminum plate, a rubber plate, etc., but is not limited thereto. The fixing member is a device capable of fixing the fixing plate to the rear part of the foot. For example, the fixing member may be an elastic band, a fixing claw, etc., but is not limited thereto.

[0088] As can be seen from the above, the orthopedic prosthesis implantation auxiliary device 100 provided in the embodiment of the present application fixes the metatarsal bones by the first fixing part 10, so as to prevent the metatarsal-phalangeal joint from being affected by other metatarsal bones during the operation. The proximal phalanx is clamped and moved by the second fixing part 20, so that the proximal phalanx, the middle phalanx connected to the proximal phalanx, and the distal phalanx connected to the middle phalanx can be perpendicular to the metatarsal bones to expose the bone cross-sections of the metatarsal bones and the proximal phalanx constituting the metatarsal-phalangeal joint, thereby facilitating the implantation of the orthopedic prosthesis. The orthopedic prosthesis implantation auxiliary device 100 is fixed to the foot of the patient by the third fixing part 30, so as to prevent the relative displacement between the orthopedic prosthesis implantation auxiliary device 100 and the foot of the patient during the operation, resulting in deviation of the implantation position of the orthopedic prosthesis.

[0089] In some embodiments, please refer to Figure 1 and Figure 2 The first fixing portion 10 also includes a first fixing plate 12 and a rotating connecting member 13 .

[0090] A plurality of fixing grooves recessed into the first fixing plate 12 are formed on both sides of the first fixing plate 12 , and the contact surface of the first fixing plate 12 in contact with the foot and the contact surface of the second fixing portion 20 in contact with the foot without rotation are in the same plane.

[0091] One end of the rotating connector 13 is rotatably connected to one side of the first fixing plate 12 close to the second fixing portion 20, and the other end of the rotating connector 13 is connected to the second fixing portion 20. The rotating connector 13 is used to enable the second fixing portion 20 to rotate relative to the first fixing plate 12 so that the bone cross-sections of the metatarsal bones and proximal phalanges constituting the metatarsophalangeal joint are exposed.

[0092] Part of the metatarsal fixation device 11 is located in the fixation groove, and the metatarsal fixation device 11 can be close to or away from the first fixation plate 12 along the depth direction of the fixation groove.

[0093] It can be understood that the first fixing plate 12 is a plate-like structure. For example, the first fixing plate 12 can be an aluminum plate, a rubber plate, etc., but is not limited thereto.

[0094] The rotating connection member 13 is a component that enables the second fixing portion 20 to rotate relative to the first fixing plate 12. For example, the rotating connection member 13 can be a hinge, etc., but is not limited thereto.

[0095] In this way, the multiple fixing grooves on the first fixing plate 12 provide space for the movement of the metatarsal fixing device 11, and the metatarsal fixing device 11 is set in any fixing groove to achieve a better fixing angle and thus a better fixing effect. The second fixing part 20 can be rotated relative to the first fixing plate 12 by rotating the connecting member 13, so that the bone cross-sections of the metatarsal bones and the proximal phalanges constituting the metatarsophalangeal joint are exposed, which facilitates the implantation of the orthopedic prosthesis.

[0096] In some embodiments, see Figure 3 The metatarsal fixation device 11 includes a first connection mechanism 111 and a first fixing mechanism 112. The first connection mechanism 111 is arranged on the first fixing plate 12 in a translatable and rotatable manner, and is partially located in the fixing groove. The first connection mechanism 111 can approach or move away from the first fixing plate 12 along the depth direction of the fixing groove. The first fixing mechanism 112 is arranged on the first connection mechanism 111 in a rotatable manner and is used to fix the metatarsal.

[0097] It can be understood that the first connecting mechanism 111 is a mechanism that can move and rotate freely along the depth direction of the fixing groove. For example, the first connecting mechanism 111 may include a connecting member and a rotating member 11122, etc., but is not limited to this. Among them, the connecting member can be a connecting rod, a connecting slider, etc., but is not limited to this. The rotating member 11122 can be a belt drive turntable, a gear drive turntable, etc., but is not limited to this. The first fixing mechanism 112 is a mechanism that can resist and fix the metatarsal. For example, the first fixing mechanism 112 can be a telescopic rod, a mechanical gripper, etc., but is not limited to this.

[0098] In this way, the first connecting mechanism 111 is translated and rotated to achieve an ideal distance between the first fixing mechanism 112 and the foot and an ideal angle between the first fixing mechanism 112 and the fixing point on the metatarsal bone to be fixed. The metatarsal bone is then fixed after the position of the metatarsal bone is moved by the first fixing mechanism 112 to avoid adverse effects of other metatarsal bones on the surgery.

[0099] In some embodiments, see Figure 3 The first connecting mechanism 111 includes a first connecting member 1111, a rotating mechanism 1112 and two second connecting members 1113. The first connecting member 1111 can be arranged on the first fixed plate 12 in a translational manner, and is partially located in the fixed groove. The first connecting member 1111 can be close to or away from the first fixed plate 12 along the depth direction of the fixed groove. The rotating mechanism 1112 is rotatably arranged on one end of the first connecting member 1111 away from the first fixed plate 12. The two second connecting members 1113 are arranged on the rotating mechanism 1112 and the two second connecting members 1113 are respectively located on both sides of the rotating mechanism 1112 along the diameter direction of the rotating mechanism 1112. Among them, the first fixed mechanism 112 can be lifted and lowered along the height direction of the second connecting member 1113 and is rotatably arranged between the two second connecting members 1113.

[0100] It can be understood that the first connecting member 1111 is a component that can translate along the depth direction of the fixing groove. For example, the first connecting member 1111 can be a connecting rod, a connecting slider, etc., but is not limited thereto.

[0101] The rotating mechanism 1112 is a mechanism that can drive the second connecting member 1113 to rotate. For example, the rotating mechanism 1112 can be a belt-driven turntable, a gear-driven turntable, etc., but is not limited thereto.

[0102] The second connecting member 1113 is a rod-shaped structure. For example, the second connecting member 1113 can be a rack climbing rod, a hole climbing rod, etc., but is not limited thereto.

[0103] In this way, the distance between the first fixing mechanism 112 and the foot is changed by changing the position of the first connecting member 1111, and the angle of the two second connecting members 1113 is changed by rotating the mechanism 1112, thereby changing the angle between the first fixing mechanism 112 arranged between the two second connecting members 1113 and the fixing point on the metatarsal bone to be fixed, so that the relative position of the first fixing mechanism 112 and the foot reaches an ideal position.

[0104] In some embodiments, see Figure 3 and Figure 4 The rotating mechanism 1112 includes a housing 11121, a rotating member 11122, a rotating platform 11123 and an elastic member 11124.

[0105] The shell 11121 is arranged on one end of the first connecting member 1111 away from the first fixed plate 12, and the interior of the shell 11121 has a rotation accommodating space. The side of the shell 11121 close to the first fixing mechanism 112 is provided with two rotation through grooves that penetrate one side of the shell 11121 and connect to the rotation accommodating space, and the inner wall of the shell 11121 away from the first fixing mechanism 112 is provided with multiple inner wall grooves.

[0106] The rotating member 11122 is partially located in the rotating accommodation space, and the rotating member 11122 is translationally and rotatably arranged on the shell 11121 , and the rotating member 11122 can approach the shell 11121 or move away from the shell 11121 .

[0107] The rotating table 11123 is located in the rotating accommodating space and is connected to the portion of the rotating member 11122 located in the rotating accommodating space. A plurality of rotating protrusions corresponding to the inner wall grooves are provided on one side of the rotating table 11123 away from the first fixing mechanism 112, and the rotating protrusions can be completely located in the inner wall grooves.

[0108] The elastic member 11124 is located in the rotating accommodation space, one end of the elastic member 11124 is connected to the shell 11121, and the other end of the elastic member 11124 is connected to the rotating table 11123. The elastic member 11124 is used to make the rotating table 11123 conflict with the shell 11121 so that the rotating protrusion is completely located in the inner wall groove.

[0109] Among them, the two second connecting members 1113 are partially located in the rotating accommodating space and are arranged on the rotating table 11123, and the two second connecting members 1113 are respectively located on both sides of the rotating table 11123 along the diameter direction of the rotating table 11123, and the two second connecting members 1113 pass through two rotating through grooves respectively, and the second connecting members 1113 can move along the notch direction of the rotating through groove.

[0110] It can be understood that the shell 11121 is a shell-like structure. For example, the shell 11121 can be an aluminum shell, a copper shell, etc., but is not limited thereto.

[0111] The rotating member 11122 is a component that can drive the rotating platform 11123 to rotate. For example, the rotating member 11122 can be a knob, a crank, etc., but is not limited thereto.

[0112] The rotating table 11123 is a circular plate-like structure, for example, the rotating table 11123 is an aluminum plate, a plastic plate, etc., but is not limited thereto.

[0113] The elastic member 11124 is a component that can continuously provide elastic force to make the rotating table 11123 tightly attached to the inner wall of the shell 11121 away from the first fixing mechanism 112. For example, the elastic member 11124 can be a coil spring, a volute spring, etc., but is not limited thereto.

[0114] With such arrangement, when it is necessary to change the angle of the first fixing mechanism 112, the rotating member 11122 is first pressed to disengage the rotating protrusion on the rotating member 11122 from the inner wall groove, and then the rotating member 11122 is rotated to drive the rotating table 11123 to rotate, and then drive the two second connecting members 1113 arranged on the rotating table 11123 to rotate and drive the first fixing mechanism 112 arranged between the two second connecting members 1113 to rotate, and then release the finger pressing the rotating member 11122, and the rotating table 11123 moves away from the first fixing mechanism 112 under the elastic force of the elastic member 11124, so that the rotating protrusion is completely located in the inner wall groove, thereby fixing the relative position of the rotating table 11123 and the shell 11121, preventing the rotating table 11123 from moving during the operation and driving the first fixing mechanism 112 to move.

[0115] In some embodiments, see Figure 3 and Figure 5 The first fixing mechanism 112 includes a first fixing member 1121 and a second fixing member 1122. The first fixing member 1121 can move along the height direction of the second connecting member 1113 and is rotatably disposed on the two second connecting members 1113 and is located between the two second connecting members 1113. The second fixing member 1122 is telescopically disposed on the first fixing member 1121 for fixing the metatarsal.

[0116] It can be understood that the first fixing member 1121 is a device that can move along the height direction of the second connecting members 1113 and is rotatably arranged between the two second connecting members 1113. For example, the first fixing member 1121 can be a screw lift, an electric sliding platform, etc., but is not limited to this.

[0117] The second fixing member 1122 is a device that can be telescopically disposed on the first fixing member 1121. For example, the second fixing member 1122 can be a telescopic rod, a hydraulic push rod, etc., but is not limited thereto.

[0118] With such arrangement, the height and angle of the second fixing member 1122 are changed by the first fixing member 1121, so that the relative position of the second fixing member 1122 and the foot reaches an ideal state, and then the metatarsal bones are contacted and fixed by extending the second fixing member 1122, thereby preventing other metatarsal bones from affecting the implantation process of the orthopedic prosthesis.

[0119] In some embodiments, see Figure 3 , Figure 6 and Figure 7 The second connecting member 1113 is provided with a plurality of connecting holes along the height direction of the second connecting member 1113 , and the first fixing member 1121 includes a fixing shell 11211 , a rotating wheel 11212 , two fixing bars 11213 and a transmission member 11214 .

[0120] The fixed shell 11211 is movably disposed on the second connecting member 1113 . The fixed shell 11211 has a first accommodation space, a second accommodation space and a third accommodation space therein. The first accommodation space is communicated with the second accommodation space and the third accommodation space respectively.

[0121] The rotating wheel 11212 is located in the first accommodating space and is rotatably disposed on the fixing shell 11211 .

[0122] The two fixing strips 11213 are movably located partially in the second accommodating space and the third accommodating space respectively, and mesh with the rotating wheel 11212 . One end of the fixing strip 11213 away from the rotating wheel 11212 has a fixing protrusion corresponding to the connecting hole.

[0123] The transmission member 11214 is rotatably disposed on the fixed shell 11211 and is partially located in the first accommodating space. The portion of the transmission member 11214 located in the first accommodating space is connected to the rotating wheel 11212 .

[0124] The rotating wheel 11212 can drive the two fixing bars 11213 meshed with the rotating wheel 11212 to move closer to each other or away from each other so that the fixing protrusion does not pass through the connecting hole or passes through the connecting hole.

[0125] It can be understood that the fixed shell 11211 is a shell-like structure. For example, the fixed shell 11211 can be an aluminum shell, a copper shell, etc., but is not limited thereto.

[0126] The rotating wheel 11212 is a gear. For example, the rotating wheel 11212 can be a spur gear, a helical gear, etc., but is not limited thereto.

[0127] The fixing bar 11213 is a rack. For example, the fixing bar 11213 can be a spur rack, a helical rack, etc., but is not limited thereto.

[0128] The transmission member 11214 is a component that can drive the rotating wheel 11212 to rotate. For example, the transmission member 11214 can be a knob, a crank, etc., but is not limited thereto.

[0129] With such arrangement, when the height of the first fixing member 1121 needs to be adjusted, the transmission member 11214 is first rotated in a clockwise direction to drive the rotating wheel 11212 to rotate, thereby driving the two fixing bars 11213 engaged with the rotating wheel 11212 to move closer to each other so that the fixing protrusion that originally passed through the connecting hole does not pass through the connecting hole. Then, after the first fixing member 1121 is moved to an ideal height, the transmission member 11214 is rotated in a counterclockwise direction to drive the rotating wheel 11212 to rotate, thereby driving the two fixing bars 11213 engaged with the rotating wheel 11212 to move away from each other so that the fixing protrusion that originally did not pass through the connecting hole passes through the connecting hole, thereby fixing the positions of the first fixing member 1121 and the second connecting member 1113.

[0130] In some embodiments, see Figure 3 and Figure 5 The second fixing member 1122 includes a fixing block 11221 , a rotating nut 11222 and a fixing rod 11223 .

[0131] The fixing block 11221 is disposed on the fixing shell 11211 , and the fixing block 11221 has a fixing through hole.

[0132] The rotating nut 11222 is rotatably disposed on the fixed block 11221 . The rotating nut 11222 has a rotating through hole. The rotating through hole has an internal thread. The rotating through hole is coaxial with the fixed through hole.

[0133] The fixing rod 11223 can be movably disposed on the fixing block 11221 along the depth direction of the fixing through hole, and is partially located in the fixing through hole and the rotating through hole. The fixing rod 11223 has an external thread corresponding to the internal thread of the rotating through hole.

[0134] The rotating nut 11222 is used to drive the fixing rod 11223 to move closer to or away from the metatarsal bone, so as to fix the metatarsal bone through the fixing rods 11223 of the multiple metatarsal fixing devices 11 .

[0135] It can be understood that the fixing block 11221 is a block structure. For example, the fixing block 11221 can be an aluminum block, a plastic block, etc., but is not limited thereto.

[0136] The rotating nut 11222 is a nut. For example, the rotating nut 11222 can be a hexagonal nut, a slotted nut, etc., but is not limited thereto.

[0137] The fixing rod 11223 is a rod-shaped structure. For example, the fixing rod 11223 can be a threaded rod, a threaded fixing rod 11223, etc., but is not limited thereto.

[0138] With such arrangement, when it is necessary to make the fixing rod 11223 contact the metatarsal, the fixing rod 11223 is moved closer to the metatarsal along the fixing through hole by rotating the rotating nut 11222 in a clockwise direction; when it is not necessary for the fixing rod 11223 to contact the metatarsal, the fixing rod 11223 is moved away from the metatarsal along the fixing through hole by rotating the rotating nut 11222 in a counterclockwise direction; when it is necessary to fix the metatarsal, the two fixing rods 11223 can be respectively used to contact the metatarsal to fix the position of the metatarsal.

[0139] In some embodiments, see Figure 1 The second fixing part 20 includes a second fixing plate 21 and a phalanx fixing device 22 .

[0140] The second fixing plate 21 is rotatably arranged on the first fixing plate 12 around the first axis and is connected to the rotating connecting member 13. A movable groove is provided on the second fixing plate 21. The contact surface of the second fixing plate 21 that contacts the foot without rotating and the contact surface of the first fixing plate 12 that contacts the foot are in the same plane. When the second fixing plate 21 rotates, the bone cross-sections of the metatarsal bones and proximal phalanges that constitute the metatarsophalangeal joint can be exposed.

[0141] The phalange fixing device 22 is movably disposed on the second fixing plate 21 and is partially located in the moving groove. The phalange fixing device 22 can move along the notch direction of the moving groove. The phalange fixing device 22 is used to clamp and move the proximal phalange.

[0142] It can be understood that the second fixing plate 21 is a plate-like structure. For example, the second fixing plate 21 can be an aluminum plate, a plastic plate, etc., but is not limited thereto.

[0143] The phalanx fixing device 22 is a device that can clamp and move the proximal phalanx. For example, the phalanx fixing device 22 can be a pneumatic clamper, an electric clamper, etc., but is not limited thereto.

[0144] With such arrangement, when the operation is performed, the proximal phalanx is clamped and moved to a preset position (a position convenient for the operation) by the phalanx fixing device 22 and then fixed to avoid movement of the proximal phalanx during the operation. When an orthopedic prosthesis needs to be implanted in the metatarsophalangeal joint, the second fixing plate 21 is rotated so that the second fixing plate 21 is perpendicular or parallel to the first fixing plate 12, thereby exposing the bone cross-sections of the metatarsal bones and proximal phalanx constituting the metatarsophalangeal joint, thereby facilitating the implantation of the orthopedic prosthesis.

[0145] In some embodiments, see Figure 1 and Figure 8 The phalanx fixing device 22 includes a first fixing connector 221 , a second fixing connector 222 and a second fixing mechanism 223 .

[0146] The first fixed connector 221 is movably disposed on the second fixed plate 21 and is partially located in the movable groove. The first fixed connector 221 can move along the notch direction of the movable groove. The second fixed connector 222 is disposed on an end of the first fixed connector 221 close to the foot. The second fixing mechanism 223 is disposed on the second fixed connector 222, and the second fixing mechanism 223 is used to clamp the proximal phalanx.

[0147] It can be understood that the first fixed connection member 221 can be a wedge-shaped locking mechanism, or a threaded locking mechanism, etc., but is not limited thereto.

[0148] The second fixed connector 222 is an L-shaped plate structure. For example, the second fixed connector 222 may be an aluminum plate, a plastic plate, etc., but is not limited thereto.

[0149] The second fixing mechanism 223 can be a mechanical claw, a pneumatic clamping mechanism, etc., but is not limited thereto.

[0150] In this way, after the proximal phalanx is clamped by the second fixing mechanism 223, the first fixing connection 221 is moved to drive the second fixing mechanism 223 set on the second fixing connection 222 to move so that the proximal phalanx is moved to the preset position. When the proximal phalanx moves to the preset position, the relative position of the first fixing connection and the second fixing plate 21 is fixed to avoid movement of the proximal phalanx during the operation.

[0151] In some embodiments, see Figure 8 The second fixing mechanism 223 includes a plurality of positioning rods 2231 and a plurality of second fixing rods 2232. The plurality of positioning rods 2231 are rotatably arranged on the second fixing connector 222 around a second axis, the second axis being a line connecting the center points of the plurality of positioning rods 2231 arranged on the second fixing connector 222, and the two ends of the positioning rods 2231 can move closer to or farther from the two ends of the adjacent positioning rods 2231. The plurality of second fixing rods 2232 are movably arranged on the positioning rod 2231, and every two second fixing rods 2232 correspond to one positioning rod 2231, and the two second fixing rods 2232 corresponding to the positioning rod 2231 can move closer to or farther from each other along the length direction of the positioning rod 2231 to clamp the proximal phalanx.

[0152] It can be understood that the positioning rod 2231 is a plate-like structure with a strip-shaped notch in the middle. For example, the positioning rod 2231 can be an aluminum plate, a plastic plate, etc., but is not limited thereto.

[0153] The second fixing rod 2232 is a rod-shaped structure. For example, the second fixing rod 2232 can be a combination of a threaded rod and a nut, a tapered rod, etc., but is not limited thereto.

[0154] With such arrangement, by adjusting the position of each positioning rod 2231, each second fixing rod 2232 on the positioning rod 2231 can surround the proximal phalanx, and then the two second fixing rods 2232 on each positioning rod 2231 are brought closer to each other and in contact with the foot, thereby achieving the function of clamping the proximal phalanx and avoiding movement of the proximal phalanx during surgery.

[0155] In some embodiments, the third fixing portion 30 includes: a third fixing plate 31 , a moving rod 32 and a plurality of rearfoot fixing devices 33 .

[0156] The contact surface of the third fixing plate 31 and the contact surface of the first fixing plate 12 and the foot are in the same plane, and the third fixing plate 31 has a receiving groove, which is used to partially receive the rear of the foot. One end of the moving rod 32 is connected to the first fixing plate 12, and the other end of the moving rod 32 is connected to the third fixing plate 31. The third fixing plate 31 can move closer to or away from the first fixing plate 12 along the moving rod 32. A plurality of rear foot fixing devices 33 are movably arranged on both sides of the third fixing plate 31, and the rear foot fixing devices 33 are used to contact and fix the rear of the foot.

[0157] It can be understood that the third fixing plate 31 is a plate-like structure. For example, the material of the third fixing plate 31 can be aluminum, plastic, etc., but is not limited thereto.

[0158] The moving rod 32 is a rod-shaped structure. For example, the moving rod 32 may be a screw rod, a sliding screw, etc., but is not limited thereto.

[0159] The rear foot fixing device 33 is a device that can fix the relative position of the rear foot and the third fixing plate 31. For example, the rear foot fixing device 33 can be a flexible supporting device, a mechanical fixing claw, etc., but is not limited thereto.

[0160] In this way, the third fixing plate 31 is moved along the moving rod 32 so that the accommodating groove portion of the third fixing plate 31 can accommodate the rear of the foot, and then the position of the rear of the foot and the third fixing plate 31 are fixed by the rear foot fixing device 33 to avoid the relative position of the foot and the third fixing plate 31 from changing during the operation.

[0161] The present application also provides a method for controlling an orthopedic prosthesis implantation assisting device 100, which is applied to the orthopedic prosthesis implantation assisting device 100 of any of the above embodiments. The method includes:

[0162] Make the sole of the foot contact with the first fixing part 10, then adjust the positions of the second fixing part 20 and the third fixing part 30 so that the second fixing part 20 fixes the proximal phalanx, and make the third fixing part 30 away from the side of the first fixing part 10 contact with the back of the foot, so as to fix the position of the foot and the orthopedic prosthesis implantation auxiliary device 100.

[0163] The position of the metatarsal is adjusted and fixed by the metatarsal fixing device 11 so that the metatarsophalangeal joint where the orthopedic prosthesis needs to be implanted will not be affected by other metatarsal bones during the operation.

[0164] The second fixing part 20 is rotated about the first axis to separate the proximal phalanx fixed on the second fixing part 20 from the corresponding metatarsal bone so that the bone cross section is exposed to facilitate the implantation of the orthopedic prosthesis.

[0165] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An orthopedic prosthesis implant assisting device, characterized in that: include: A first fixing part, the first fixing part comprising a plurality of metatarsal fixing devices, the metatarsal fixing devices being used to fix the metatarsal bones; a second fixing portion, rotatably disposed on one end of the first fixing portion about a first axis, the first axis being located on a contact surface between the first fixing portion and the second fixing portion and being parallel to a contact surface between the first fixing portion and the foot, the second fixing portion being used to clamp and move the proximal phalanx, and a contact surface between the second fixing portion and the foot being in contact with the first fixing portion without rotating being in the same plane as a contact surface between the first fixing portion and the foot; and The third fixing part is movably arranged at the other end of the first fixing part, and the third fixing part is used to fix the rear part of the foot. The contact surface between the third fixing part and the foot and the contact surface between the first fixing part and the foot are in the same plane.

2. The orthopedic prosthesis implant assisting device according to claim 1, characterized in that: The first fixing portion further includes: A first fixing plate, wherein a plurality of fixing grooves recessed into the first fixing plate are formed on both sides of the first fixing plate, and a contact surface of the first fixing plate in contact with the foot and a contact surface of the second fixing portion in contact with the foot when the second fixing portion does not rotate are in the same plane; and a rotating connector, one end of which is rotatably connected to a side of the first fixing plate close to the second fixing portion, and the other end of which is connected to the second fixing portion, and the rotating connector is used to enable the second fixing portion to rotate relative to the first fixing plate so as to expose bone cross sections of the metatarsal bones and proximal phalanges constituting the metatarsophalangeal joint; Wherein, the metatarsal fixation device is partially located in the fixation groove, and the metatarsal fixation device can approach or move away from the first fixation plate along the depth direction of the fixation groove.

3. The orthopedic prosthesis implant assisting device according to claim 2, characterized in that: The metatarsal fixation device comprises: a first connecting mechanism, which is translationally and rotatably disposed on the first fixing plate and is partially located in the fixing groove, and the first connecting mechanism can approach or move away from the first fixing plate along a depth direction of the fixing groove; and The first fixing mechanism is arranged on the first connecting mechanism in a liftable and rotatable manner, and the first fixing mechanism is used to fix the metatarsal.

4. The orthopedic prosthesis implantation assisting device according to claim 3, characterized in that: The first connecting mechanism comprises: A first connecting member is disposed on the first fixing plate in a translationally movable manner and is partially located in the fixing groove, and the first connecting member can approach or move away from the first fixing plate along a depth direction of the fixing groove; a rotating mechanism, rotatably disposed on an end of the first connecting member away from the first fixing plate; and Two second connecting members are arranged on the rotating mechanism and are respectively located on two sides of the rotating mechanism along the diameter direction of the rotating mechanism; Wherein, the first fixing mechanism can be raised and lowered along the height direction of the second connecting member and can be rotatably arranged between the two second connecting members.

5. The orthopedic prosthesis implantation auxiliary device according to claim 4, characterized in that: The rotating mechanism comprises: A shell, arranged on one end of the first connecting member away from the first fixing plate, the shell has a rotation accommodating space inside, two rotation through grooves penetrating one side of the shell and connected to the rotation accommodating space are provided on a side of the shell close to the first fixing mechanism, and a plurality of inner wall grooves are provided on an inner wall of a side of the shell away from the first fixing mechanism; A rotating member, part of which is located in the rotating accommodation space, and the rotating member is arranged on the housing in a translationally and rotatably manner, and the rotating member can approach the housing or move away from the housing; a rotating platform, located in the rotating accommodation space and connected to the portion of the rotating member located in the rotating accommodation space, wherein a side of the rotating platform away from the first fixing mechanism is provided with a plurality of rotating protrusions corresponding to the inner wall grooves, and the rotating protrusions can be completely located in the inner wall grooves; and an elastic member, located in the rotation accommodating space, one end of the elastic member being connected to the shell, and the other end of the elastic member being connected to the rotating platform, the elastic member being used to make the rotating platform contact the shell so that the rotating protrusion is completely located in the inner wall groove; Among them, the two second connecting members are partially located in the rotating accommodating space and are arranged on the rotating table, and the two second connecting members are respectively located on both sides of the rotating table along the diameter direction of the rotating table, and the two second connecting members respectively pass through the two rotating through grooves, and the second connecting members can move along the notch direction of the rotating through groove.

6. The orthopedic prosthesis implantation assisting device according to claim 4, characterized in that: The first fixing mechanism comprises: a first fixing member, movable along the height direction of the second connecting member and rotatably disposed on the two second connecting members and located between the two second connecting members; and The second fixing member is telescopically arranged on the first fixing member and is used for fixing the metatarsal bone.

7. The orthopedic prosthesis implantation assisting device according to claim 6, characterized in that: The second connecting member is provided with a plurality of connecting holes along the height direction of the second connecting member, and the first fixing member comprises: A fixed shell is movably disposed on the second connecting member, wherein a first accommodation space, a second accommodation space and a third accommodation space are formed in the fixed shell, and the first accommodation space is respectively connected with the second accommodation space and the third accommodation space; A rotating wheel, located in the first accommodating space and rotatably disposed on the fixed shell; Two fixing bars are movably located partially in the second accommodating space and the third accommodating space respectively and meshed with the rotating wheel, and one end of the fixing bar away from the rotating wheel has a fixing protrusion corresponding to the connecting hole; and a transmission member rotatably disposed on the fixed shell and partially located in the first accommodation space, wherein the portion of the transmission member located in the first accommodation space is connected to the rotating wheel; Wherein, the rotating wheel can drive the two fixing bars meshed with the rotating wheel to move closer to each other or away from each other so that the fixing protrusion does not pass through the connecting hole or passes through the connecting hole.

8. The orthopedic prosthesis implantation assisting device according to claim 7, characterized in that: The second fixing member comprises: A fixing block, arranged on the fixing shell, the fixing block having a fixing through hole; a rotating nut rotatably disposed on the fixed block, the rotating nut having a rotating through hole, the rotating through hole having an internal thread, the rotating through hole being coaxial with the fixed through hole; and A fixing rod is movably disposed on the fixing block along the depth direction of the fixing through hole and is partially located in the fixing through hole and the rotating through hole, and the fixing rod has an external thread corresponding to the internal thread of the rotating through hole; The rotating nut is used to drive the fixing rod to move closer to or away from the metatarsal bone, so as to fix the metatarsal bone through the fixing rods of the plurality of metatarsal fixing devices.

9. The orthopedic prosthesis implantation assisting device according to claim 2, characterized in that: The second fixing portion includes: a second fixing plate, rotatably disposed on the first fixing plate around the first axis and connected to the rotating connector, a moving slot being provided on the second fixing plate, a contact surface of the second fixing plate in contact with the foot when the second fixing plate is not rotating and a contact surface of the first fixing plate in contact with the foot being in the same plane, and the second fixing plate being able to expose bone cross sections of the metatarsal bones and proximal phalanges constituting the metatarsophalangeal joint when the second fixing plate is rotating; and A phalange fixing device is movably disposed on the second fixing plate and is partially located in the moving groove. The phalange fixing device can move along the notch direction of the moving groove, and is used to clamp and move the proximal phalange; The phalanx fixing device comprises: A first fixed connection member is movably disposed on the second fixed plate and is partially located in the movable groove, and the first fixed connection member can move along the notch direction of the movable groove; A second fixed connection member, disposed on an end of the first fixed connection member close to the foot; and A second fixing mechanism is disposed on the second fixing connector, and the second fixing mechanism is used to clamp the proximal phalanx; The second fixing mechanism comprises: A plurality of positioning rods are rotatably arranged on the second fixed connection member around a second axis, wherein the second axis is a line connecting the center points of the plurality of positioning rods arranged on the second fixed connection member, and the two ends of the positioning rods can be close to or away from the two ends of the adjacent positioning rods; A plurality of second fixing rods are movably arranged on the positioning rod, and every two of the second fixing rods correspond to one positioning rod. The two second fixing rods corresponding to the positioning rod can move closer to or farther away from each other along the length direction of the positioning rod to clamp the proximal phalanx.

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