CN113456314A - Distal femur revision type tumor prosthesis - Google Patents

Distal femur revision type tumor prosthesis Download PDF

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Publication number
CN113456314A
CN113456314A CN202110880822.3A CN202110880822A CN113456314A CN 113456314 A CN113456314 A CN 113456314A CN 202110880822 A CN202110880822 A CN 202110880822A CN 113456314 A CN113456314 A CN 113456314A
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CN
China
Prior art keywords
femoral
stump
femur
fixing
distal
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Pending
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CN202110880822.3A
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Chinese (zh)
Inventor
郭卫
杨毅
郭煜
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Peking University Peoples Hospital
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Peking University Peoples Hospital
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Priority to CN202110880822.3A priority Critical patent/CN113456314A/en
Publication of CN113456314A publication Critical patent/CN113456314A/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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • 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
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of shafts
    • 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
    • A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
    • 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
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • 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]

Landscapes

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

Abstract

The invention relates to a distal femur revision type tumor prosthesis, which comprises a matched distal femur component and a femur stump fixing component; the lower end of the assembled distal femur component is used for forming a hinge joint with the tibia, and the upper end of the assembled distal femur component forms a taper joint end; the femoral stump fixing component comprises: the lower end of the matched extension section is connected with the upper end of the matched distal femur component in a tapered manner, and the upper end of the matched extension section forms a central platform; and the femur stump fixing sleeve is integrally formed on the central platform of the assembled extension section and is configured to be sleeved outside the femur stump and fixedly connected with the femur stump. The invention can perfectly deal with the extreme conditions that the medullary cavity handle can not be taken out, bone cement can not be removed, bone is damaged and the like because the whole tumor prosthesis does not have components related to the medullary cavity. Even when the medullary cavity rod can be taken out, except the common condition of clean bone cement, the extramedullary fixing mode does not need the bone cement, thereby reducing the difficulty of subsequent revision.

Description

Distal femur revision type tumor prosthesis
Technical Field
The invention relates to an artificial prosthesis, in particular to a distal femur revision type tumor prosthesis, and belongs to the technical field of medical instruments.
Background
Distal femur is the most common site for the development of osteosarcoma and other malignant bone tumors. Artificial joint prosthesis replacement is a common reconstruction method after resection of malignant bone tumors around the knee joint, and conventionally, customized knee joint prostheses are mainly used, and in recent years, combined joint prostheses are mostly adopted. Although the artificial joint prosthesis reconstruction has good functional effects, various complications such as aseptic loosening, mechanical failure such as prosthesis handle fracture and deep infection exist.
Most of the failed knee joint tumor prostheses need to be rebuilt, and the rebuilt prosthesis surgery faces many challenges, which may face problems including extensive bone defects, poor quality of remaining bone, difficult removal of the prosthesis stem, etc. It is very difficult to remove the stem of the joint prosthesis from the cement-fixed medullary cavity, especially to remove the bone cement from the bone-poor medullary cavity.
If the poor bone and bone cement are removed altogether, the remaining bone segments are insufficient to secure the prosthesis stem. Of course, several prosthetic revision methods have been developed in recent years, including short stem compression fixation prostheses (Zimmer Biomet composites), prosthesis stem locking prostheses, telescopic techniques (televiewing methods), and the like. All of the above methods require taking out the broken stem of the prosthesis from a firm cement fixation or, in the case of loose stem of the prosthesis, bone cement bonded to bone in the medullary cavity, often requiring bone grooving or the like, seriously damaging the bone quality of the proximal end of the femur.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a distal femoral revision type tumor prosthesis, which does not require removal of a prosthesis stem or removal of bone cement from a bone-poor intramedullary cavity when performing a revision surgery.
In order to achieve the purpose, the invention adopts the following technical scheme: a distal femur revision type tumor prosthesis comprises a matched distal femur component and a femur stump fixing component; wherein the lower end of the matched femoral distal component is used for forming a hinge joint with the tibia, and the upper end of the matched femoral distal component forms a tapered end; the femoral stump fixation assembly includes: a matched stack extension segment having a lower end that is tapered to an upper end of the matched stack femoral distal component, the upper end of the matched stack extension segment forming a central platform; a femoral stump fixing sleeve integrally formed on the central platform of the assembled extension segment, the femoral stump fixing sleeve configured to fit over and be securely connected to the exterior of the femoral stump.
The distal end of femur renovation type tumour prosthesis, preferably, the incomplete fixed sleeve of femur is three fens of fork sleeves, promptly the incomplete fixed sleeve of femur includes along three fixed arms of axial extension, and three the fixed arm is arranged along circumference equidistance on the central platform of matched stack formula extension section, three the fixed arm encloses jointly and becomes the fixed chamber that is used for holding the incomplete end of femur.
The distal femur revision type tumor prosthesis preferably has a diameter of the central platform slightly larger than a diameter of the femoral stump so as to accommodate the femoral stump between the three fixing arms.
Preferably, each fixing arm is provided with a plurality of fixing screw holes at intervals along the axial direction.
The distal femur revision type tumor prosthesis preferably adapts to patients with different femur defect degrees by adjusting the length of the assembled extension section according to different bone defect lengths.
The distal femur revision type tumor prosthesis preferably has a porous metal bone trabecula structure with a pore size of 400-600 μm and complete communication prepared by a 3D printing technology on the upper surface of the central platform and the inner contact surface of each fixing arm contacting with the outer surface of the femur stump, wherein the porosity is more than 80%, and the pore layer thickness is 2 mm.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention can perfectly deal with the extreme conditions that the medullary cavity handle can not be taken out, bone cement can not be removed, bone is damaged and the like because the whole tumor prosthesis does not have components related to the medullary cavity. Even when the medullary cavity rod can be taken out, except the common condition of clean bone cement, the extramedullary fixing mode does not need the bone cement, thereby reducing the difficulty of subsequent revision.
2. According to the invention, the porous metal bone trabecular structure is prepared on the central platform and the inner contact surfaces of the fixing arms, which are contacted with the outer surface of the proximal end of the femur, by using a 3D printing technology, so that an ingrowth space is provided for the new bone tissue, the new bone tissue can crawl into the pore structure, and finally the prosthesis handle is integrated on the residual end of the femur, thereby greatly increasing the long-term stability and prolonging the service life of the tumor prosthesis.
3. The distal femur revision type tumor prosthesis provided by the invention is particularly suitable for the following situations: (1) the distal femoral prosthesis stem is broken, and the prosthesis stem is difficult to remove; (2) the remaining proximal femur bone is not long enough to implant the prosthetic stem; (3) poor quality of the remaining proximal femur; (4) the bone cement in the proximal medullary cavity of the remaining femur is difficult to remove or causes further damage to the remaining bone mass when removed.
Drawings
Fig. 1 is a schematic structural diagram of a distal femur revision type tumor prosthesis according to an embodiment of the present invention from a first perspective;
fig. 2 is a schematic structural diagram of the distal femur revision type tumor prosthesis provided in the embodiment of the present invention under a second viewing angle;
fig. 3 is a schematic structural diagram of the distal femur revision type tumor prosthesis provided in the embodiment of the present invention under a third perspective.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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 invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides a distal femur revision type tumor prosthesis, which comprises a matched distal femur component and a femur stump fixing component; the lower end of the assembled distal femoral component is used for forming a hinge joint with a tibia, and the upper end of the assembled distal femoral component forms a tapered joint; the femoral stump fixing component comprises: the lower end of the matched extension section is connected with the upper end of the matched distal femur component in a tapered manner, and the upper end of the matched extension section forms a central platform; and the femur stump fixing sleeve is integrally formed on the central platform of the assembled extension section and is configured to be sleeved outside the femur stump and fixedly connected with the femur stump. The invention can perfectly deal with the extreme conditions that the medullary cavity handle can not be taken out, bone cement can not be removed, bone is damaged and the like because the whole tumor prosthesis does not have components related to the medullary cavity. Even when the medullary cavity rod can be taken out, except the common condition of clean bone cement, the extramedullary fixing mode does not need the bone cement, thereby reducing the difficulty of subsequent revision.
The following describes a distal femur revision type tumor prosthesis provided by an embodiment of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present embodiment provides a distal femur revision type tumor prosthesis, which comprises a matched distal femur component 10 and a femur stump fixing component 20. Wherein the lower end of the modular femoral distal component 10 is configured to form a hinge joint with the tibia and the upper end of the modular femoral distal component 10 forms a tapered end. The femoral stump fixing component 20 comprises a matched assembly type extension section 21 and a femoral stump fixing sleeve 22, the lower end of the matched assembly type extension section 21 is connected to the upper end of the matched assembly type femoral distal component 10 in a tapered mode, the upper end of the matched assembly type extension section 21 forms a central platform 23, the femoral stump fixing sleeve 22 is integrally formed on the central platform 23 of the matched assembly type extension section 21, and the femoral stump fixing sleeve 22 is configured to be sleeved on the outer portion of the femoral stump and connected with the femoral stump in a fastening mode.
In the above embodiment, preferably, the femur residual fixing sleeve 22 is a three-forked sleeve, that is, the femur residual fixing sleeve 22 includes three fixing arms 24 extending along the axial direction, and the three fixing arms 24 are equally spaced along the circumferential direction on the central platform 23 of the assembled extension 21, and the three fixing arms 24 together define a fixing cavity for accommodating the femur residual.
In the above embodiment, central platform 23 preferably has a diameter slightly larger than the diameter of the femoral stump to accommodate the femoral stump between three securing arms 24.
In the above embodiment, the length of the assembled extension 21 can be adjusted according to different bone defect lengths, so as to adapt to patients with different femur defect degrees.
In the above embodiment, each fixing arm 24 is preferably provided with a plurality of fixing screw holes 25 at intervals along the axial direction, so that the tumor prosthesis can be fixed on the femur stump by using cortical screws at the initial stage of implantation of the tumor prosthesis, and an instant stabilizing effect can be obtained.
In the above embodiment, preferably, a porous metal bone trabecular structure with a pore size of 400-.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. A distal femur revision type tumor prosthesis, which is characterized by comprising a matched distal femur component (10) and a femur stump fixing component (20); wherein,
the lower end of the assembled distal femoral component (10) is used for forming a hinge joint with a tibia, and the upper end of the assembled distal femoral component (10) forms a tapered end;
the femoral stump fixation assembly (20) includes:
a modular extension (21), the lower end of the modular extension (21) being tapered to the upper end of the modular femoral distal component (10), the upper end of the modular extension (21) forming a central platform (23);
a femoral stump fixing sleeve (22) integrally formed on the central platform (23) of the modular extension (21), the femoral stump fixing sleeve (22) being configured to fit over and be securely connected to the exterior of the femoral stump.
2. The distal femoral revision type tumor prosthesis according to claim 1, wherein the femoral stump fixing sleeve (22) is a three-pronged sleeve, i.e. the femoral stump fixing sleeve (22) comprises three fixing arms (24) extending in the axial direction, and the three fixing arms (24) are arranged circumferentially at equal intervals on a central platform (23) of the built-up extension section (21), the three fixing arms (24) together enclosing a fixing cavity for accommodating the femoral stump.
3. The distal femoral revision tumor prosthesis of claim 2, wherein the diameter of the central platform (23) is slightly larger than the diameter of the femoral stump to accommodate the femoral stump between the three securing arms (24).
4. The distal femoral revision type tumor prosthesis according to claim 2, wherein each of the fixing arms (24) is axially provided with a plurality of fixing screw holes (25) at intervals.
5. The distal femoral revision tumor prosthesis of claim 1, wherein the length of the modular extension (21) is adjusted to accommodate patients with different degrees of femoral defect according to different lengths of bone defect.
6. The distal femoral revision type tumor prosthesis according to claim 1, wherein a porous metal trabecular structure with a pore size of 400-600 μm and complete connectivity is prepared on the upper surface of the central platform (23) and the inner contact surface of each fixing arm (24) contacting with the outer surface of the femoral stump by using 3D printing technology, the porosity is more than 80%, and the pore layer thickness is 2 mm.
CN202110880822.3A 2021-08-02 2021-08-02 Distal femur revision type tumor prosthesis Pending CN113456314A (en)

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CN202110880822.3A CN113456314A (en) 2021-08-02 2021-08-02 Distal femur revision type tumor prosthesis

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Application Number Priority Date Filing Date Title
CN202110880822.3A CN113456314A (en) 2021-08-02 2021-08-02 Distal femur revision type tumor prosthesis

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113797001A (en) * 2021-10-09 2021-12-17 北京大学人民医院 Built-in artificial limb connecting device
CN116747054A (en) * 2023-08-17 2023-09-15 苏州市康力骨科器械有限公司 Expandable pressurized fixed trauma type orthopaedics implant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113797001A (en) * 2021-10-09 2021-12-17 北京大学人民医院 Built-in artificial limb connecting device
CN116747054A (en) * 2023-08-17 2023-09-15 苏州市康力骨科器械有限公司 Expandable pressurized fixed trauma type orthopaedics implant

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