CN113303951A - 3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy - Google Patents

3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy Download PDF

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Publication number
CN113303951A
CN113303951A CN202110765512.7A CN202110765512A CN113303951A CN 113303951 A CN113303951 A CN 113303951A CN 202110765512 A CN202110765512 A CN 202110765512A CN 113303951 A CN113303951 A CN 113303951A
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CN
China
Prior art keywords
ligament
fixing groove
prosthesis
locking plate
collateral
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Pending
Application number
CN202110765512.7A
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Chinese (zh)
Inventor
闵理
卢敏勋
张瑀琦
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West China Precision Medicine Industrial Technology Institute
West China Hospital of Sichuan University
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West China Precision Medicine Industrial Technology Institute
West China Hospital of Sichuan University
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Application filed by West China Precision Medicine Industrial Technology Institute, West China Hospital of Sichuan University filed Critical West China Precision Medicine Industrial Technology Institute
Priority to CN202110765512.7A priority Critical patent/CN113303951A/en
Publication of CN113303951A publication Critical patent/CN113303951A/en
Pending legal-status Critical Current

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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
    • A61F2/3859—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
    • A61F2/3836—Special connection between upper and lower leg, e.g. constrained
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention discloses a 3D printing femur condyle anatomical bionic type half knee joint prosthesis which comprises a femur far-end prosthesis, an artificial ligament and a ligament locking plate, wherein the artificial ligament comprises an anterior cruciate ligament, a posterior cruciate ligament, an inner collateral ligament and an outer collateral ligament, two through holes are formed in the femur far-end prosthesis and are respectively used for the anterior cruciate ligament and the posterior cruciate ligament to penetrate and be fixed on the femur far-end prosthesis, a ligament fixing groove and a ligament locking plate fixing groove are further formed in the femur far-end prosthesis, the ligament locking plate fixing groove and the ligament fixing groove are arranged in a crossed mode, and the ligament locking plate tightly presses the artificial ligament and is fixed in the ligament locking plate fixing groove. The 3D printing femur condyle dissection bionic type half-knee joint prosthesis adopts a single-pole design, so that tibia side epiphysis is kept as far as possible, and the growth function of the tibia bone can be ensured while the movement function of the knee joint is reconstructed; through reasonable fixing of the ligament, the distal femoral prosthesis can rotate back and forth relative to the tibial plateau, and the knee joint is allowed to do flexion and extension movement.

Description

3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy
Technical Field
The invention relates to the field of artificial prosthesis replacement, in particular to a 3D-printed femur condyle anatomical bionic type half-knee joint prosthesis.
Background
The distal femur is the most common part of malignant bone tumors such as osteosarcoma, and surgical resection of the tumors can cause defect of the distal femur and accumulation of knee joints to cause knee joint dysfunction. Osteosarcomas are most often found in young people under the age of 20 years, especially children, who have not yet healed or not fully healed epiphyses and still have their bones in a growing developmental stage. Currently, hinged tumor-type knee replacements are the most common surgical reconstruction approaches. When the hinge type tumor knee joint prosthesis is used for cutting off the distal femur, part of the proximal tibia needs to be cut off together to place prosthesis parts, so that proximal tibia epiphysis is affected, the growth of the tibia is affected, the left leg and the right leg are unequal in length after a long time, walking lameness and the like are caused, and a prolonged revision surgery is needed in severe cases. The revision surgery will face the problems of multiple surgeries, high economic cost, large wound area of patients and the like.
Therefore, the remote biological reconstruction of tumor femurs from young patients and the maximum preservation of growth function after surgery have become an important research topic.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the 3D-printed femur condyle anatomical bionic type half-knee joint prosthesis, which is used for reconstructing the distal end of the femur and ensuring the stability of the knee joint under the condition of keeping the lateral epiphysis of the tibia as much as possible and ensuring the growth and development of the tibia to the maximum extent.
In order to achieve the technical purpose, the invention adopts the technical scheme that:
the utility model provides a bionical type knee joint prosthesis is dissected to 3D printing thighbone condyle, includes thighbone distal end prosthesis, artificial ligament, ligament lockplate, artificial ligament includes anterior cruciate ligament, back cruciate ligament, inboard collateral ligament, outside collateral ligament, set up two perforating holes in the thighbone distal end prosthesis, supply anterior cruciate ligament and back cruciate ligament to pass respectively and fix on thighbone distal end prosthesis, ligament fixed slot and ligament lockplate fixed slot have still been seted up on the thighbone distal end prosthesis, ligament lockplate fixed slot with ligament fixed slot cross arrangement, ligament lockplate compresses tightly artificial ligament and is fixed in the ligament lockplate fixed slot.
Furthermore, the entrance of the through hole is positioned at the bottom surface of the distal femoral prosthesis, the exit is positioned at the inner surface of the distal femoral prosthesis, a first ligament fixing groove is formed between the two exits, a first ligament locking plate fixing groove crossed with the first ligament fixing groove is formed in the first ligament locking plate fixing groove, the anterior/posterior cruciate ligament penetrates through the through hole, then one end of the anterior/posterior cruciate ligament is connected into the first ligament fixing groove, and the ligament locking plate tightly presses the anterior/posterior cruciate ligament to be fixed in the first ligament locking plate fixing groove.
Furthermore, a boss matched with the first ligament fixing groove is arranged on the ligament locking plate, and the ligament locking plate is fixed in the first ligament locking plate fixing groove of the distal femoral prosthesis through screws.
Preferably, the surface of the first ligament fixing groove is a rough surface, and the boss is provided with a saw-toothed protrusion.
Furthermore, an outer collateral ligament fixing groove and a second ligament locking plate fixing groove crossed with the outer collateral ligament fixing groove are formed in the outer side wall of the femur far-end prosthesis, one end of the outer collateral ligament is connected into the outer collateral ligament fixing groove, and the second ligament locking plate compresses the outer collateral ligament and is fixed in the second ligament locking plate fixing groove.
Furthermore, an inner collateral ligament fixing groove and a third ligament locking plate fixing groove crossed with the inner collateral ligament fixing groove are formed in the inner side wall of the femur far-end prosthesis, one end of the inner collateral ligament is connected into the inner collateral ligament fixing groove, and the third ligament locking plate tightly presses the inner collateral ligament and is fixed in the third ligament locking plate fixing groove.
Preferably, the second/ligamentum triplex locking plate is provided with a compression boss matched with the external/internal collateral ligament fixing groove, and the second/ligamentum triplex locking plate is respectively fixed in a second/ligamentum triplex locking plate fixing groove of the distal femoral prosthesis through screws; the surface of the external/internal ligament fixing groove is a rough surface, and the pressing boss is provided with a saw-toothed protrusion.
Further, the upper part of the distal femoral prosthesis is provided with an assembly section which is in a cone frustum shape.
Compared with the prior art, the invention has the beneficial effects that:
1) the 3D printing femur condyle dissection bionic type half-knee joint prosthesis adopts a single-pole design, so that tibia side epiphysis is kept as far as possible, and the growth function of the tibia bone can be ensured while the movement function of the knee joint is reconstructed;
2) the invention can lead the distal femur prosthesis to rotate back and forth relative to the tibial plateau by reasonably fixing the ligament, and allows the knee joint to do flexion and extension movement;
3) the first ligament fixing groove and the outer/inner collateral ligament fixing groove for placing the ligament are rough in surface, the surface of the boss for pressing the ligament is serrated, pressing force can be increased, and stability of ligament fixation is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic perspective view of a distal femoral prosthesis according to an embodiment of the present invention;
FIG. 2 is a right side view of the femoral distal prosthesis shown in FIG. 1;
fig. 3 is a schematic structural view of a ligament locking plate according to an embodiment of the present invention;
FIG. 4 is a right side view of the ligament locking plate shown in FIG. 3;
reference numerals: 10-distal femoral prosthesis, 11-segmental, 12-through hole, 13-first ligament fixation slot, 14-first ligament locking plate fixation slot, 15-lateral accessory ligament fixation slot, 16-second ligament locking plate fixation slot, 17-medial accessory ligament fixation slot, 18-third ligament locking plate fixation slot, 121-entry, 122-exit, 20-ligament locking plate, 21-boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The embodiment of the invention provides a 3D printing femur condyle anatomical bionic type half knee joint prosthesis, which comprises a femur far-end prosthesis 10, an artificial ligament and a ligament locking plate 20, wherein the artificial ligament comprises an anterior cruciate ligament, a posterior cruciate ligament, an inner collateral ligament and an outer collateral ligament, two through holes 12 are formed in the femur far-end prosthesis 10 and are respectively used for the anterior cruciate ligament and the posterior cruciate ligament to pass through and be fixed on the femur far-end prosthesis 10, a ligament fixing groove and a ligament locking plate fixing groove are further formed in the femur far-end prosthesis 10, the ligament locking plate fixing groove and the ligament locking plate fixing groove are arranged in a crossed mode, and the ligament locking plate compresses the artificial ligament to be fixed in the ligament fixing groove; the distal femoral prosthesis 10 is constrained by the artificial ligament to rotate anteriorly and posteriorly relative to the tibial plateau to allow flexion and extension movements of the knee joint.
Specifically, the entrance 122 of the through hole 12 is located at the bottom surface of the distal femoral prosthesis 10, the exit 121 is located at the inner surface of the distal femoral prosthesis 10, a first ligament fixing groove 13 is formed between the two exits 121, and a first ligament locking plate fixing groove 14 intersecting with the first ligament fixing groove 13 is formed, the anterior/posterior cruciate ligament is connected in the first ligament fixing groove 13 after passing through the through hole 12, and the ligament locking plate 20 compresses the anterior/posterior cruciate ligament and is fixed in the first ligament locking plate fixing groove 14.
The ligament locking plate 20 is provided with a boss 21 matched with the first ligament fixing groove, and the ligament locking plate 20 is fixed in the first ligament locking plate fixing groove 14 of the distal femur prosthesis 10 through screws; the surface of the first ligament fixing groove is a rough surface, and the boss 21 is provided with a saw-toothed protrusion, so that the anterior/posterior cruciate ligaments are compressed, and the ligament fixing stability is improved.
Further, an outer collateral ligament fixing groove 15 and a second ligament locking plate fixing groove 16 intersecting the outer collateral ligament fixing groove 15 are formed in the outer side wall of the femoral distal prosthesis 10, one end of the outer collateral ligament is connected in the outer collateral ligament fixing groove 15, and the second ligament locking plate tightly presses the outer collateral ligament and is fixed in the second ligament locking plate fixing groove 16.
Further, an inner collateral ligament fixing groove 17 and a third ligament locking plate fixing groove 18 intersecting the inner collateral ligament fixing groove 17 are formed in the inner side wall of the femoral distal prosthesis 10, one end of the inner collateral ligament is connected in the inner collateral ligament fixing groove 15, and the third ligament locking plate presses the inner collateral ligament and is fixed in the third ligament locking plate fixing groove 18.
The second/ligamentum triplex locking plate is provided with a compression boss matched with the external/internal collateral ligament fixing groove, and the second/ligamentum triplex locking plate is respectively fixed in a second/ligamentum triplex locking plate fixing groove of the distal femur prosthesis 10 through screws; the surface of the external/internal ligament fixing groove is a rough surface, and the pressing boss is provided with a saw-toothed protrusion, so that the external/internal collateral ligament is pressed, and the stability of ligament fixing is improved.
The upper part of the distal femoral prosthesis 10 is provided with an assembly section 11, and the assembly section 11 is in a cone frustum shape and is used for being implanted into the femoral bone marrow cavity of a patient; the arc-shaped joint surface at the lower part of the distal femur prosthesis 10 is adapted to the femur arc-shaped joint surface which is obtained by bone tissue modeling by adopting MINICS software and is inosculated with a patient, a tibial joint surface platform of the patient can be accurately matched, a tibial side platform surface, an epiphyseal part and surrounding tissues can be kept as far as possible, the bone growth function of a young patient can be ensured while the knee joint movement function is reconstructed, and the stability of the joint movement is maintained.
The 3D printing femur condyle dissection bionic type half-knee joint prosthesis provided by the invention adopts a unipolar design, and can ensure the bone growth function of a young patient while reconstructing the knee joint movement function; through reasonably fixing the ligament, the distal femoral prosthesis can rotate back and forth relative to the tibial plateau, and the knee joint is allowed to do flexion and extension movement; the first ligament fixing groove and the outer/inner collateral ligament fixing groove for placing the ligament are rough in surface, and the surface of the boss for pressing the ligament is serrated, so that pressing force can be increased, and the stability of ligament fixation is improved.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims (8)

1. The utility model provides a bionical type half knee joint prosthesis is dissected to 3D printing femoral condyle which characterized in that: including distal femur prosthesis (10), artificial ligament, ligament lockplate (20), the artificial ligament includes anterior cruciate ligament, back cruciate ligament, inboard collateral ligament, outside collateral ligament, set up two perforating holes (12) in distal femur prosthesis (10), supply anterior cruciate ligament and back cruciate ligament to pass respectively and fix on distal femur prosthesis (10), ligament fixed slot and ligament lockplate fixed slot have still been seted up on distal femur prosthesis (10), ligament lockplate fixed slot with ligament fixed slot is the setting of crossing, ligament lockplate compresses tightly artificial ligament and is fixed in the ligament lockplate fixed slot.
2. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 1, wherein: the entry (122) of perforating hole (12) is located distal femur prosthesis (10) bottom surface, export (121) are at distal femur prosthesis (10) internal surface, it is equipped with first ligament fixed slot (13) to open between two exports (121) to set up first ligament lockplate fixed slot (14) with first ligament fixed slot (13) intersection, anterior/posterior cruciate ligament passes perforating hole (12) back one end and connects in first ligament fixed slot (13), ligament lockplate (20) compress tightly anterior/posterior cruciate ligament and are fixed in first ligament lockplate fixed slot (14).
3. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 2, wherein: the ligament locking plate (20) is provided with a boss (21) matched with the first ligament fixing groove, and the ligament locking plate (20) is fixed in the first ligament locking plate fixing groove (14) of the distal femur prosthesis (10) through screws.
4. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 3, wherein: the surface of the first ligament fixing groove is a rough surface, and the boss (21) is provided with a saw-toothed protrusion.
5. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 1, wherein: the femoral distal prosthesis is characterized in that an outer collateral ligament fixing groove (15) and a second ligament locking plate fixing groove (16) crossed in the outer collateral ligament fixing groove (15) are formed in the outer side wall of the femoral distal prosthesis (10), one end of the outer collateral ligament is connected into the outer collateral ligament fixing groove (15), and the second ligament locking plate compresses the outer collateral ligament and is fixed in the second ligament locking plate fixing groove (16).
6. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 5, wherein: an inner collateral ligament fixing groove (17) and a third ligament locking plate fixing groove (18) crossed in the inner collateral ligament fixing groove (17) are formed in the inner side wall of the femur far-end prosthesis (10), one end of an inner collateral ligament is connected into the inner collateral ligament fixing groove (15), and the third ligament locking plate compresses the inner collateral ligament and is fixed in the third ligament locking plate fixing groove (18).
7. The 3D printed femoral condyle anatomic biomimetic type semi-knee prosthesis of claim 6, wherein: the second/tri-ligament locking plate is provided with a pressing boss matched with the outer/inner collateral ligament fixing groove, and the second/tri-ligament locking plate is respectively fixed in a second/tri-ligament locking plate fixing groove of the distal femoral prosthesis (10) through screws; the surface of the external/internal ligament fixing groove is a rough surface, and the pressing boss is provided with a saw-toothed protrusion.
8. The 3D printed femoral condyle anatomic biomimetic type hemi-knee prosthesis according to any of claims 1-7, wherein: the upper part of the distal femur prosthesis (10) is provided with an assembly section (11), and the assembly section (11) is in a cone frustum shape.
CN202110765512.7A 2021-07-06 2021-07-06 3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy Pending CN113303951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110765512.7A CN113303951A (en) 2021-07-06 2021-07-06 3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110765512.7A CN113303951A (en) 2021-07-06 2021-07-06 3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy

Publications (1)

Publication Number Publication Date
CN113303951A true CN113303951A (en) 2021-08-27

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Application Number Title Priority Date Filing Date
CN202110765512.7A Pending CN113303951A (en) 2021-07-06 2021-07-06 3D prints half knee joint prosthesis of bionical type of thighbone condyle anatomy

Country Status (1)

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