CN111658241B - Adjustable prosthetic bone for knee joint - Google Patents

Adjustable prosthetic bone for knee joint Download PDF

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Publication number
CN111658241B
CN111658241B CN202010566639.1A CN202010566639A CN111658241B CN 111658241 B CN111658241 B CN 111658241B CN 202010566639 A CN202010566639 A CN 202010566639A CN 111658241 B CN111658241 B CN 111658241B
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China
Prior art keywords
tibia
femur
connecting piece
piece
sliding
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CN202010566639.1A
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Chinese (zh)
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CN111658241A (en
Inventor
李峰
许志明
谢政
皮国富
许建中
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First Affiliated Hospital of Zhengzhou University
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First Affiliated Hospital of Zhengzhou University
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Priority to CN202010566639.1A priority Critical patent/CN111658241B/en
Publication of CN111658241A publication Critical patent/CN111658241A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3859—Femoral components
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3886—Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2825—Femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2892—Tibia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
    • A61F2002/30528—Means for limiting said movement

Abstract

The invention relates to an adjustable prosthesis bone piece for knee joint, the top of the tibia connecting piece is fixedly provided with a middle buffer layer, the bottom of the tibia connecting piece is provided with a tibia mounting groove, a tibia buffer adjusting piece is movably arranged in the tibia mounting groove, the outer side surface of the varus limit edge and the femur connecting piece is provided with an upper connecting rack layer, the top of the tibia connecting piece is provided with a tibia connecting gear matched with the upper connecting rack layer, and the inner side surfaces of the varus limit edge and the femur connecting piece are provided with femur buffer adjusting pieces; the self-adaptive adjusting device has self-adaptive adjusting capability, can implement corresponding micro-distance adjustment according to the specific shapes of the femur and the tibia of a patient in the installation process, is used for guaranteeing curved surface clearance balance and internal and external balance, provides a set of self-adaptive adjusting firmware on the premise of fully considering buffering, and guarantees the overall balance of the firmware in the later use process and avoids loosening phenomenon.

Description

Adjustable prosthetic bone for knee joint
Technical Field
The invention relates to the field of medical treatment, in particular to an adjustable prosthetic bone for knee joints.
Background
The knee joint is composed of the lower end of femur, the upper end of tibia and patella, is the most complex joint of human body, and belongs to the pulley joint. In clinic, knee prostheses are often used to replace diseased or necrotic or otherwise abnormally functioning knee components, and the use of knee prosthetic bone pieces is now well established. The variety of prosthetic firmware is varied and whether a replacement prosthesis is appropriate is directly related to the prognosis of the patient. After the prosthesis is installed, the common failure cause is that the normal service performance is lost due to the loose pathological changes of the prosthesis, the traditional bone piece can loose after installation, meanwhile, the good curved surface gap balance and the internal and external balance are required to be considered during the use, so that the bone piece is required to have certain self-adaptive adjustment capability, and the phenomenon that the traditional bone piece cannot loose too much is caused on the premise of having certain adjustment capability. Conventional knee prosthesis firmware suffers from certain drawbacks in the above-described problems.
Therefore, the adjustable prosthetic bone for knee joint has the advantages of simple structure, convenient operation, high working and running efficiency, firm installation, strong self-adaptive adjustment capability, buffering and damping effects, novel installation mode, strong adjustment capability, strong adjustment adaptability, no loosening phenomenon, stable gap balance between the curved surface after installation and internal and external balance coefficients, simple use method and easy operation, and wide market prospect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the adjustable prosthetic bone for the knee joint, which has the advantages of simple structure, convenient operation, high working and running efficiency, firm installation, strong self-adaptive adjustment capability, buffering and damping effect, novel installation mode, strong adjustment capability, strong adjustment adaptability, no loosening phenomenon, stable clearance balance between the curved surface after installation and internal and external balance coefficients, simple and easy operation using method and the like, and is used for overcoming the defects in the prior art.
The technical scheme of the invention is realized as follows: the utility model provides an adjustable prosthetic bone spare for knee joint, includes the femur connecting piece that has varus limit and with femur connecting piece matched with tibia connecting piece, the top fixed mounting of tibia connecting piece have the middle part buffer layer, be provided with the tibia mounting groove in the bottom of tibia connecting piece, movable mounting tibia buffering adjustment piece in the tibia mounting groove, the lateral surface that varus limit and femur connecting piece is provided with upper portion connection rack layer, install on the top of tibia connecting piece with upper portion connection rack layer matched with tibia connecting gear, install femur buffering adjustment piece in the medial surface of varus limit and femur connecting piece.
The two varus limiting edges are arranged at the outer side of the bottom of the femur connecting piece in parallel, the femur connecting piece and the two varus limiting edges are of an integrated structure, the inner sides of the two varus limiting edges and the inner side of the femur connecting piece form a coherent arc structure, the top of the femur connecting piece is of an arc-shaped structure, the tops of the two varus limiting edges are of arc-shaped structures, and the setting height of the varus limiting edges is half of the setting height of the femur connecting piece.
The utility model provides a tibia connecting piece be cavity structure, the top surface of tibia connecting piece is spherical cambered surface structure, the bottom of middle part buffer layer and the top surface fixed connection of tibia connecting piece, the top at tibia connecting piece and middle part buffer layer all is provided with the open-top that is linked together with tibia connecting piece inner chamber, tibia connecting gear installs in this open-top, tibia connecting gear's bottom and middle part are through the spacing cavity of installing at tibia connecting piece of rotation axis, tibia connecting gear's top hourglass is in this open-top, tibia connecting gear is two, two tibia connecting gear equal correspond the bottom that sets up at two varus limit.
The middle part buffer layer be three curved surface arc sheet structure, the middle part of middle part buffer layer is provided with the recess, the bottom of this recess cooperatees with the top surface of tibia connecting piece, the both sides of middle part buffer layer all are provided with the convex surface, this convex surface cooperatees with the outer edge of tibia connecting piece, the top surface of the recess that middle part buffer layer middle part set up cooperatees with the bottom curved surface of two varus limit limits and femur connecting piece, the length of middle part buffer layer bottom is not less than the length of tibia connecting piece top surface, the bottom parcel of middle part buffer layer is in the top outside of tibia connecting piece.
The tibia mounting groove is of a hemispherical groove structure, the bottom of a tibia connecting piece at the outer side of the bottom of the tibia mounting groove is of an arc structure, the groove depth of the tibia mounting groove is one half of the height of the tibia connecting piece, a tibia buffer adjusting piece is of an arc-shaped sheet structure, the arc surfaces of the tibia buffer adjusting piece and the arc surfaces of the tibia mounting groove are matched with each other, a tibia sliding nut adjusting hole and a tibia fixing bolt mounting hole are respectively formed in the inner wall of the tibia mounting groove, a tibia sliding nut assembly is mounted in the tibia sliding nut adjusting hole, a tibia fixing bolt is mounted in the tibia fixing bolt mounting hole, an assembly mounting hole is formed in the side face of the tibia connecting piece, the outer ends of the tibia sliding nut assembly and the tibia fixing bolt are respectively arranged in the assembly mounting hole, the inner ends of the tibia fixing bolt are arranged in the tibia mounting groove, the inner ends of the tibia sliding nut assembly are fixedly connected with the outer side face of the tibia sliding head, and the outer side face of the tibia sliding head is fixedly arranged on the tibia sliding head.
The upper connecting rack layer is of a long strip structure, the top of the upper connecting rack layer is fixedly connected with the inverted limit edge and the bottom outer side face of the femur connecting piece, the outer side face of the upper connecting rack layer is provided with an outer side tooth socket, the outer side face of the outer side tooth socket is meshed with the outer side face of the tibia connecting gear, the inverted limit edge and the side face of the femur connecting piece are provided with femur buffering adjusting piece limiting grooves, the top of the femur buffering adjusting piece limiting grooves is provided with femur sliding nut adjusting holes and femur fixing bolt mounting holes, femur sliding nut components are mounted in the femur sliding nut adjusting holes, femur fixing bolts are mounted in the femur fixing bolt mounting holes, the bottom ends of the femur sliding nut components and the femur fixing bolts are all arranged in the femur buffering adjusting piece limiting grooves, the top of the femur fixing bolts are arranged at the top of the femur buffering adjusting piece, the bottom face of the femur buffering adjusting piece is of an arc-shaped structure, the top of the femur buffering adjusting piece is matched with the inverted limit edge and the top face of the femur connecting piece, the top of the femur buffering adjusting piece is fixedly connected with the bottom of the femur buffering adjusting piece, the femur sliding nut components are formed by fixing nuts, the femur sliding nuts and the femur sliding nuts are mounted at the outer side of the femur sliding nuts and the femur sliding nuts.
The distance between the middle outer side surface of the femur connecting piece and the outer side surface of the top of the inward turning limit edge is not greater than the length of the top surface of the tibia connecting piece, and the top surface of the tibia connecting piece is of a cylindrical structure with a groove.
The tibia connecting piece is internally and fixedly provided with a rotating shaft supporting sleeve, and the rotating shaft is sleeved in the rotating shaft supporting sleeve.
The invention has the following positive effects: firstly, this product convenient operation, work and operating efficiency are high, avoided the emergence of the phenomenon such as body not hard up pathological change, avoided traditional bone spare to appear not hard up phenomenon after the installation, the product wholly provides stable curved surface clearance balance and inside and outside balance, wholly possess self-adaptation's regulating capability, and at the in-process of installation, can implement corresponding micro-distance adjustment according to patient's femur and tibia's specific shape, be used for guaranteeing curved surface clearance balance and inside and outside balance, under the prerequisite of fully having considered the buffering, a set of self-adaptation firmware of adjusting has been provided, the holistic equilibrium of firmware in the use of later stage has been guaranteed and the emergence of avoiding appearing not hard up phenomenon is avoided.
Drawings
Fig. 1 is a schematic diagram of a front view structure of the present invention.
Fig. 2 is a schematic side view of the present invention.
FIG. 3 is a schematic diagram of the internal structure of the present invention.
FIG. 4 is a schematic diagram of a usage status structure of the present invention.
FIG. 5 is a second schematic view of the usage status structure of the present invention.
FIG. 6 is a second schematic diagram of the internal structure of the present invention.
Detailed Description
As shown in fig. 1, 2, 3, 4, 5 and 6, an adjustable prosthetic bone for knee joint comprises a femur connector 1 with an varus limit edge 2 and a tibia connector 3 matched with the femur connector 1, wherein a middle buffer layer 4 is fixedly arranged at the top of the tibia connector 3, a tibia buffer adjusting plate 6 is movably arranged in the tibia mounting groove 5, an upper connecting rack layer 8 is arranged on the external side of the varus limit edge 2 and the femur connector 1, a tibia connecting gear 15 matched with the upper connecting rack layer 8 is arranged at the top end of the tibia connector 3, and femur buffer adjusting plates 14 are arranged on the internal side of the varus limit edge 2 and the femur connector 1. The two varus limiting edges 2 are arranged in parallel on the outer side of the bottom of the femur connecting piece 1, the femur connecting piece 1 and the two varus limiting edges 2 are of an integrated structure, the inner sides of the two varus limiting edges 2 and the inner side of the femur connecting piece 1 form a coherent arc structure, the top of the femur connecting piece 1 is of an arc structure, the top of the two varus limiting edges 2 are of arc structures, and the setting height of the varus limiting edges 2 is half of the setting height of the femur connecting piece 1.
The tibia connecting piece 3 be cavity structure, the top surface of tibia connecting piece 3 is spherical cambered surface structure, the bottom of middle part buffer layer 4 and the top surface fixed connection of tibia connecting piece 3, the top at tibia connecting piece 3 and middle part buffer layer 4 all is provided with the open-top that is linked together with tibia connecting piece 3 inner chamber, tibia connecting gear 15 installs in this open-top, tibia connecting gear 15's bottom and middle part are spacing to be installed in tibia connecting piece 3's cavity through rotation axis 16, tibia connecting gear 15's top leaks outside this open-top, tibia connecting gear 15 is two, two tibia connecting gear 15 equal correspond the bottom that sets up at two varus limit limits 2. The middle part buffer layer 4 be three curved surface arc sheet structure, the middle part of middle part buffer layer 4 is provided with the recess, the bottom of this recess cooperatees with the top surface of tibia connecting piece 3, the both sides of middle part buffer layer 4 all are provided with the convex surface, this convex surface cooperatees with the outer edge of tibia connecting piece 3, the top surface of the recess that middle part buffer layer 4 middle part set up cooperatees with the bottom curved surface of two varus spacing limits 2 and femur connecting piece 1, the length of middle part buffer layer 4 bottom is not less than the length of tibia connecting piece 3 top surface, the bottom parcel of middle part buffer layer 4 is in the top outside of tibia connecting piece 3.
The tibia mounting groove 5 is of a hemispherical groove structure, the bottom of the tibia connecting piece 3 at the outer side of the bottom of the tibia mounting groove 5 is of an arc-shaped structure, the groove depth of the tibia mounting groove 5 is one half of the height of the tibia connecting piece 3, the tibia buffer adjusting piece 6 is of an arc-shaped sheet structure, the arc surfaces of the tibia buffer adjusting piece 6 and the tibia mounting groove 5 are matched with each other, a tibia sliding nut adjusting hole and a tibia fixing bolt mounting hole are respectively formed in the inner wall of the tibia mounting groove 5, a tibia sliding nut assembly 11 is mounted in the tibia sliding nut adjusting hole, a tibia fixing bolt 7 is mounted in the tibia fixing bolt mounting hole, an assembly mounting hole 10 is formed in the side face of the tibia connecting piece 3, the outer ends of the tibia sliding nut assembly 11 and the tibia fixing bolt 7 are all arranged in the assembly mounting hole 10, the inner end of the tibia fixing bolt 7 is arranged in the tibia mounting groove 5, the inner end of the tibia sliding nut assembly 11 is fixedly connected with the outer side face of the tibia buffer adjusting piece 6, the tibia sliding nut assembly 11 is formed by a tibia fixing nut, a sliding nut and a sliding nut assembly 11 is fixedly mounted in the outer side face of the tibia sliding nut 6.
The upper connecting rack layer 8 is of a long strip structure, the top of the upper connecting rack layer 8 is fixedly connected with the inverted limit edge 2 and the outer side face of the bottom of the femur connecting piece 1, the outer side face of the upper connecting rack layer 8 is provided with an outer side tooth socket 9, the outer side face of the outer side tooth socket 9 is meshed with the outer side face of the tibia connecting gear 15, the inner side face of the inverted limit edge 2 and the side face of the femur connecting piece 1 are provided with femur buffering adjusting piece limiting grooves 13, femur sliding nut adjusting holes and femur fixing bolt mounting holes are formed in the tops of the femur buffering adjusting piece limiting grooves 13, femur sliding nut components 15 are mounted in the femur sliding nut adjusting holes, femur fixing bolts 12 are mounted in the femur fixing bolt mounting holes, the top ends of the femur sliding nut components 15 and the femur fixing bolts 12 are all arranged in the femur buffering adjusting piece limiting grooves 13, the bottom face of the femur buffering adjusting piece 14 is of an arc structure, the bottom face of the femur buffering adjusting piece 14 is matched with the inner side face of the femur connecting piece 2 and the top face of the femur connecting piece 1, femur sliding nut components are mounted on the outer side face of the femur sliding nut and the femur sliding nut component, and the femur sliding nut components are mounted on the outer side face of the femur sliding nut and the femur sliding nut are mounted on the outer side of the femur adjusting nut, and the femur sliding nut is mounted on the inner side of the femur sliding nut.
The distance between the outer side surface of the middle part of the femur connector 1 and the outer side surface of the top of the varus limit edge 2 is not greater than the length of the top surface of the tibia connector 3, and the top surface of the tibia connector 3 is of a cylindrical structure with a groove. The tibia connecting piece 3 is internally and fixedly provided with a rotating shaft supporting sleeve 17, and the rotating shaft 16 is sleeved in the rotating shaft supporting sleeve 17.
When the femur buffering adjusting piece is used, the femur of a patient is sleeved on the inner side of the femur buffering adjusting piece 14, then the tibia of the patient is sleeved on the inner side of the tibia buffering adjusting piece 6, tight combination of the femur of the patient is achieved through adjustment of the femur buffering adjusting piece 14, in the adjusting process, when the femur sliding bolt is screwed down, the femur sliding push head drives the femur buffering adjusting piece 14 to move upwards, fine adjustment of the position between the femur and the femur buffering adjusting piece 14 is achieved, after the position is suitable, the top end of the femur fixing bolt is screwed down with the femur of the patient through screwing down of the femur fixing bolt, the femur buffering adjusting piece 14 is installed on the femur of the patient, at this time, the inner turning limit edge 2 and the femur connecting piece 1 are connected with the femur, the bottom of the upper connecting rack layer is meshed with the outer side face of the tibia connecting gear 15 after connection is achieved, and before meshing, adjustment and fixing of the tibia connecting piece 3 are needed, the specific adjusting mode is that: when the tibia sliding bolt is screwed down, the tibia sliding bolt runs in the tibia fixing nut and drives the tibia sliding push head to run, the tibia sliding push head drives the tibia buffering adjusting piece 6 to move towards the solidification outer side direction, fine adjustment is achieved, after the tibia buffering adjusting piece 6 is combined with the tibia, the end portion of the tibia fixing bolt 7 is fixed at the moment in a bolt connection mode, fixation of the tibia buffering adjusting piece 6 and the tibia is achieved, and fixation of the tibia and the tibia connecting piece 3 can be achieved after fixation.
The product has gone to adopt slip nut subassembly and bolt assembly to implement the fixed mounting means in the side and has realized the connection of tibia, realizes the connection of femur through slip nut subassembly and bolt in the upwards fixed mode in bottom, and two fixed points are required at least to whole femur's connection, and two fixed points are also required at least to the connection of tibia, and the human joint of replacement of this product is realized to the installation of prosthesis through four at least fixed points.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (1)

1. An adjustable prosthetic bone for a knee joint comprising a femoral connection (1) with an varus limit (2) and a tibial connection (3) associated with the femoral connection (1), characterized in that: the upper part of the tibia connecting piece (3) is fixedly provided with a middle buffer layer (4), the bottom of the tibia connecting piece (3) is provided with a tibia mounting groove (5), a tibia buffer regulating piece (6) is movably mounted in the tibia mounting groove (5), the outer side surfaces of the internal turning limit edge (2) and the femur connecting piece (1) are provided with upper connecting rack layers (8), the top end of the tibia connecting piece (3) is provided with a tibia connecting gear (15) matched with the upper connecting rack layers (8), and the inner side surfaces of the internal turning limit edge (2) and the femur connecting piece (1) are provided with femur buffer regulating pieces (14); the two inward turning limiting edges (2) are arranged outside the bottom of the femur connecting piece (1) in parallel, the femur connecting piece (1) and the two inward turning limiting edges (2) are of an integrated structure, the inner sides of the two inward turning limiting edges (2) and the inner sides of the femur connecting piece (1) form a coherent arc structure, the top of the femur connecting piece (1) is of an arc structure, the tops of the two inward turning limiting edges (2) are of arc structures, and the setting height of the inward turning limiting edges (2) is half of the setting height of the femur connecting piece (1); the tibia connecting piece (3) is of a cavity structure, the top surface of the tibia connecting piece (3) is of a spherical cambered surface structure, the bottom of the middle buffer layer (4) is fixedly connected with the top surface of the tibia connecting piece (3), top openings communicated with the inner cavities of the tibia connecting piece (3) are formed in the tops of the tibia connecting piece (3) and the middle buffer layer (4), a tibia connecting gear (15) is arranged in the top opening, the bottom and the middle of the tibia connecting gear (15) are arranged in the cavity of the tibia connecting piece (3) in a limiting mode through a rotating shaft (16), the top of the tibia connecting gear (15) is leaked out above the top opening, the number of the tibia connecting gears (15) is two, and the two tibia connecting gears (15) are equally and correspondingly arranged at the bottoms of the two inwards-turned limiting edges (2); the middle buffer layer (4) is of a three-curved-surface arc-shaped sheet structure, the middle part of the middle buffer layer (4) is provided with a groove, the bottom of the groove is matched with the top surface of the tibia connecting piece (3), two sides of the middle buffer layer (4) are provided with convex surfaces, the convex surfaces are matched with the outer edges of the tibia connecting piece (3), the top surface of the groove arranged in the middle part of the middle buffer layer (4) is matched with two inward-turning limit edges (2) and the bottom curved surface of the femur connecting piece (1), the length of the bottom of the middle buffer layer (4) is not less than the length of the top surface of the tibia connecting piece (3), and the bottom of the middle buffer layer (4) is wrapped outside the top of the tibia connecting piece (3); the tibia installation groove (5) is of a hemispherical groove structure, the bottom of a tibia connecting piece (3) at the outer side of the bottom of the tibia installation groove (5) is of an arc-shaped structure, the groove depth of the tibia installation groove (5) is one half of the height of the tibia connecting piece (3), the tibia buffer adjusting piece (6) is of an arc-shaped lamellar structure, the arc surface of the tibia buffer adjusting piece (6) and the arc surface of the tibia installation groove (5) are matched with each other, a tibia sliding nut adjusting hole and a tibia fixing bolt installing hole are respectively formed in the inner wall of the tibia installation groove (5), a tibia sliding nut component (11) is installed in the tibia sliding nut adjusting hole, a tibia fixing bolt (7) is installed in the tibia fixing bolt installing hole, a component installing hole (10) is formed in the side face of the tibia connecting piece (3), the outer ends of the tibia sliding nut component (11) and the tibia fixing bolt (7) are arranged in the component installing hole, the inner end of the tibia sliding nut component is sleeved with the tibia sliding nut (6) in the tibia sliding nut, the tibia sliding nut is fixedly arranged at the outer side of the tibia sliding nut is sleeved outside the tibia sliding nut component, the outer side end surface of the tibia sliding push head is fixedly connected with the outer side surface of the tibia buffer adjusting piece (6); the upper connecting rack layer (8) is of a strip-shaped structure, the top of the upper connecting rack layer (8) is fixedly connected with the inner turning limit edge (2) and the outer side face of the bottom of the femur connecting piece (1), the outer side face of the upper connecting rack layer (8) is provided with an outer side tooth groove (9), the outer side face of the outer side tooth groove (9) is meshed with the outer side face of the tibia connecting gear (15), femur buffering adjusting piece limit grooves (13) are formed in the side faces of the inner turning limit edge (2) and the femur connecting piece (1), femur sliding nut adjusting holes and femur fixing bolt mounting holes are formed in the top of the femur buffering adjusting piece limit grooves (13), femur sliding nut components are mounted in the femur sliding nut adjusting holes, femur fixing bolts (12) are mounted in the femur fixing bolt mounting holes, the bottom ends of the femur sliding nut components and the femur fixing bolts (12) are arranged in the femur buffering adjusting piece limit grooves (13), the top ends of the femur fixing bolts (12) exceed the top of femur buffering adjusting pieces (14), the top ends of the femur buffering adjusting pieces (14) are the top faces of the femur buffering adjusting pieces (14), the femur buffering adjusting pieces are the top faces of the femur buffering adjusting pieces (2) and the top faces of the femur connecting piece (1) and the femur connecting piece, and the femur sliding nut are matched with the top of the femur sliding nut (1) and the femur connecting piece (1) respectively The femur sliding bolt and the femur sliding pushing head are formed, the femur fixing nut is fixedly arranged in the femur sliding nut adjusting hole, the femur sliding bolt is sleeved in the femur fixing nut, the outer end part of the femur sliding bolt is sleeved in the femur sliding pushing head, and the outer end surface of the femur sliding pushing head is fixedly connected with the bottom of the femur buffering adjusting piece (14); the distance between the outer side surface of the middle part of the femur connecting piece (1) and the outer side surface of the top of the inward turning limit edge (2) is not greater than the length of the top surface of the tibia connecting piece (3), and the top surface of the tibia connecting piece (3) is of a cylindrical structure with a groove; a rotating shaft supporting sleeve (17) is fixedly arranged in the tibia connecting piece (3), and a rotating shaft (16) is sleeved in the rotating shaft supporting sleeve (17); in the process of adjustment, when the femur sliding bolt is screwed up, the femur sliding pushing head drives the femur buffering regulating piece to move upwards, position fine adjustment between the femur and the femur buffering regulating piece is achieved, tight combination of the femur and the femur buffering regulating piece is achieved, after the position is suitable, through screwing up the femur fixing bolt, screwing up the top end of the femur fixing bolt and the femur of a patient is achieved, the femur buffering regulating piece is installed, at the moment, the inwards turned limit edge and the femur connecting piece are connected with the femur, after the femur connecting piece is connected in place, engagement is achieved between the bottom of the upper connecting rack layer and the outer side face of the tibia connecting gear, before engagement, adjustment and fixation are needed to be conducted on the tibia connecting piece, when the tibia sliding bolt is screwed up, the tibia sliding bolt operates in the tibia fixing nut and drives the tibia sliding pushing head to operate, the tibia buffering regulating piece moves towards the solidification outer side direction, fine adjustment is achieved, after the buffering regulating piece and the tibia are combined, at the moment, the end of the tibia fixing bolt is fixed through the bolt, the tibia buffering regulating piece and the tibia are fixed, the tibia is fixed, the tibia fixing of the tibia is achieved, and the tibia connecting piece is fixed.
CN202010566639.1A 2020-06-19 2020-06-19 Adjustable prosthetic bone for knee joint Active CN111658241B (en)

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Citations (1)

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Publication number Priority date Publication date Assignee Title
CN104799981A (en) * 2015-05-22 2015-07-29 北京爱康宜诚医疗器材股份有限公司 Bone and joint prosthesis platform gasket assembly

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US7442196B2 (en) * 2004-02-06 2008-10-28 Synvasive Technology, Inc. Dynamic knee balancer
EP2158879A1 (en) * 2008-09-01 2010-03-03 MMK Consulting GmbH Trial Prosthesis for total knee arthroplasty
WO2015033361A1 (en) * 2013-09-09 2015-03-12 Cappelletti Ava Adjustable modular spacer device for the articulation of the knee
CN109528362B (en) * 2018-12-27 2024-03-15 天衍医疗器材有限公司 Knee joint prosthesis

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Publication number Priority date Publication date Assignee Title
CN104799981A (en) * 2015-05-22 2015-07-29 北京爱康宜诚医疗器材股份有限公司 Bone and joint prosthesis platform gasket assembly

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