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CN112618113B - Total hip replacement prosthesis - Google Patents

Total hip replacement prosthesis Download PDF

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Publication number
CN112618113B
CN112618113B CN202110006999.0A CN202110006999A CN112618113B CN 112618113 B CN112618113 B CN 112618113B CN 202110006999 A CN202110006999 A CN 202110006999A CN 112618113 B CN112618113 B CN 112618113B
Authority
CN
China
Prior art keywords
femoral
positioning column
hip replacement
total hip
support seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110006999.0A
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Chinese (zh)
Other versions
CN112618113A (en
Inventor
张晓攀
周海明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Lidakang Technology Co Ltd
Original Assignee
Beijing Lidakang Technology Co Ltd
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Priority to CN202110006999.0A priority Critical patent/CN112618113B/en
Publication of CN112618113A publication Critical patent/CN112618113A/en
Application granted granted Critical
Publication of CN112618113B publication Critical patent/CN112618113B/en
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Classifications

    • 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
    • A61F2/34—Acetabular cups
    • 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
    • A61F2/3607—Femoral heads ; Femoral endoprostheses including proximal or total replacement of the 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
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral 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
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral 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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • 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]
    • 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
    • A61F2002/3233—Joints for the hip having anti-luxation means for preventing complete dislocation of the femoral head from the acetabular cup
    • 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
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of 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
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • 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
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks

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

Abstract

本申请涉及人工关节假体的领域，尤其是涉及一种全髋置换假体，包括股骨柄假体、安装在股骨柄假体上的股骨头、与股骨头相配合的髋臼杯，以及位于髋臼杯内且与股骨头直接接触的髋臼衬；股骨柄假体包括定位柱、固接于定位柱一端的仿生固定支撑座，以及固接于仿生固定支撑座远离定位柱一侧的股骨颈，股骨头装配在股骨颈上；定位柱为仿人体松质骨多孔骨小梁结构。本申请具有更好的保留患者的原始骨质，以便翻修的效果。

The present application relates to the field of artificial joint prostheses, and in particular to a total hip replacement prosthesis, comprising a femoral stem prosthesis, a femoral head mounted on the femoral stem prosthesis, an acetabular cup matched with the femoral head, and an acetabular liner located in the acetabular cup and in direct contact with the femoral head; the femoral stem prosthesis comprises a positioning column, a bionic fixing support seat fixed to one end of the positioning column, and a femoral neck fixed to the side of the bionic fixing support seat away from the positioning column, and the femoral head is assembled on the femoral neck; the positioning column is a porous trabecular structure imitating human cancellous bone. The present application has a better effect of preserving the original bone of the patient for revision.

Description

Total hip replacement prosthesis
Technical Field
The application relates to the field of artificial joint prostheses, in particular to a total hip replacement prosthesis.
Background
Total hip replacement refers to replacing diseased acetabulum and femoral head by implanting artificial acetabular cup, femoral head and femoral stem prosthesis to create normal anatomy and restore hip joint function.
The femoral stem prosthesis comprises a femoral stem body and a femoral neck, wherein the femoral head is assembled on the femoral neck, during operation, corresponding bones in a femoral marrow cavity are required to be removed, the femoral stem body is implanted into the femoral marrow cavity, and an acetabular cup is fixed in an acetabular fossa through three medical screws.
In the process of patient movement, force is transmitted to the inner wall of the femoral medullary cavity through the femoral stem body, in order to reduce the force exerted on the inner wall of the femoral medullary cavity by the femoral stem body and reduce the possibility of bone puncture, the femoral stem body is usually made long enough, but through years of clinical experience, the inventor finds that the femoral stem prosthesis on the market at present has less original bone reserved due to the overlong femoral stem body, and has difficulty in later repair.
With respect to the related art as described above, the inventors consider that the conventional femoral stem prosthesis has a defect of difficult revision.
Disclosure of Invention
In order to better preserve the original bone mass of the patient for revision, the present application provides a total hip replacement prosthesis.
The application provides a total hip replacement prosthesis, which adopts the following technical scheme:
a total hip replacement prosthesis comprises a femoral stem prosthesis, a femoral head arranged on the femoral stem prosthesis, an acetabular cup matched with the femoral head, and an acetabular liner positioned in the acetabular cup and directly contacted with the femoral head;
The femoral stem prosthesis comprises a positioning column, a bionic fixed supporting seat fixedly connected to one end of the positioning column, and a femoral neck fixedly connected to one side of the bionic fixed supporting seat away from the positioning column, wherein a femoral head is assembled on the femoral neck;
the positioning column is a porous bone trabecula structure imitating human cancellous bone.
By adopting the technical scheme, the bionic fixed support seat is arranged, so that the contact area of the femoral stem prosthesis and a femur is increased, and the force applied by the positioning column to the same point on the inner wall of a femoral medullary cavity is reduced when a patient moves, so that the possibility of bone puncture is reduced, the positioning column is of a porous bone trabecular structure imitating human cancellous bone, the femoral stem prosthesis is convenient to promote cell proliferation after being implanted into a human body, the bone making capability of osteoblasts is improved, the positioning column and the biological fixed column are beneficial to integrally grow with the femur, and the long-term stability is improved.
Preferably, the bionic fixed support seat is disc-shaped, a plurality of biological fixed columns used for extending into original bones are uniformly distributed on one side of the bionic fixed support seat, which is close to the positioning column, and the biological fixed columns are of porous bone trabecula structures imitating human cancellous bones.
By adopting the technical scheme, after the femoral stem prosthesis is implanted into a femur, the biological fixing column can extend into original bone, so that the stability of the femoral stem prosthesis after implantation is improved.
Preferably, the belt is also included;
The positioning column is provided with a first through hole which is penetrated along the radial direction of the positioning column, the bionic fixed support seat is provided with a second through hole which is penetrated along the thickness direction of the positioning column, and the binding belt is fixed with the femur through the first through hole and the second through hole.
Through adopting above-mentioned technical scheme, the setting of bandage, first through-hole and second through-hole can carry out the secondary to the femoral stem prosthesis and fix, improves the reliability of implanting.
Preferably, the number of the first through holes is two, the number of the second through holes is three, and the three second through holes are arranged in a triangle.
Through adopting above-mentioned technical scheme for medical personnel can be at the in-process of threading, carries out triangle fixation to the femoral stem prosthesis through the bandage, and stability is higher.
Preferably, the femoral stem prosthesis and the acetabular cup are integrally formed by 3D printing.
By adopting the technical scheme, the height matching with the femur and the acetabular fossa of the patient is facilitated, and the success rate of the operation is improved.
Preferably, the acetabular cup comprises an inner shell, an outer shell and a plurality of protrusions arranged on the outer shell and used for simulating titanium nails.
Through adopting above-mentioned technical scheme, replace traditional titanium nail through setting up the arch for the acetabular cup can realize fixed under the imperforate circumstances, greatly reduced because the abrasive dust flows out the bone dissolving risk that causes in the downthehole, improved clinical safety in utilization.
Preferably, the inner shell is of a solid structure, and the outer shell is of a porous bone trabecula structure imitating human cancellous bone.
By adopting the technical scheme, the inner shell has higher strength and mainly plays a supporting role, and the outer shell is convenient for bone ingrowth, so that the acetabular cup and the acetabular fossa are grown into a whole, and the long-term stability after operation is improved.
Preferably, the number of the protrusions is three.
By adopting the technical scheme, the acetabular cup can be firmly fixed.
Preferably, the acetabular liner is processed from ultra-high molecular weight polyethylene blended with vitamin E.
By adopting the technical scheme, the anti-oxidation agent has higher anti-oxidation stability and wear resistance, can effectively reduce dislocation risk and prolong service life.
Preferably, the femoral head is machined from a ceramic composite material.
By adopting the technical scheme, the femoral head has better mechanical property and low breakage rate, and the service life of the femoral head can be greatly prolonged.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the application, through the special structural design of the femoral stem prosthesis, the positioning column can achieve the same effect as the existing femoral stem body through a shorter length, so that the original bone of a patient is better reserved, and a foundation is laid for subsequent repair;
2. The femoral stem prosthesis and the acetabular cup which are processed through 3D printing can be matched with the femur and the acetabular fossa of a patient in height, so that the success rate of operation is greatly improved;
3. The stability and the firmness of the implanted prosthesis are greatly improved by the double fixation modes of bone growth and binding;
4. the traditional titanium nails are replaced by the protrusions, so that the acetabular cup can be fixed under the condition of no holes, the risk of bone dissolution caused by the flow of abrasive dust out of the holes is greatly reduced, and the safety of clinical use is improved.
Drawings
FIG. 1 is a schematic overall construction of a total hip replacement prosthesis according to an embodiment of the present application;
FIG. 2 is a schematic diagram showing a specific construction of a femoral stem prosthesis;
FIG. 3 is a schematic representation of a specific construction of an acetabular cup.
The reference numerals indicate 1, a femoral stem prosthesis, 11, a positioning column, 12, a bionic fixed support seat, 13, a femoral neck, 14, a biological fixed column, 15, a first through hole, 16, a second through hole, 2, a femoral head, 3, an acetabular cup, 31, an inner shell, 32, an outer shell, 33, a bulge, 4, an acetabular liner and 5, and a binding belt.
Detailed Description
The application is described in further detail below with reference to fig. 1-3.
The embodiment of the application discloses a total hip replacement prosthesis. Referring to fig. 1, the total hip replacement prosthesis comprises a femoral stem prosthesis 1, a femoral head 2 arranged on the femoral stem prosthesis 1, an acetabular cup 3 matched with the femoral head 2, an acetabular liner 4 positioned in the acetabular cup 3 and in direct contact with the femoral head 2, and a binding belt 5, wherein the femoral stem prosthesis 1 and the acetabular cup 3 are integrally processed through a 3D printing technology and are matched with the femur and the acetabular fossa of a patient in height, and the success rate of surgery and the postoperative recovery speed are greatly improved.
Referring to fig. 2, the femoral stem prosthesis 1 comprises a positioning column 11, a bionic fixed supporting seat 12 fixedly connected to one end of the positioning column 11, and a femoral neck 13 fixedly connected to one side of the bionic fixed supporting seat 12, which is far away from the positioning column 11, wherein the positioning column 11 is mainly used for extending into a femoral marrow cavity to play a bearing role, the bionic fixed supporting seat 12 is disc-shaped and is mainly used for increasing the contact area between the femoral stem prosthesis 1 and a femur so as to split the bearing force and reduce the possibility of bone puncture, a plurality of biological fixed columns 14 are uniformly distributed on one side of the bionic fixed supporting seat 12, which is close to the positioning column 11, and after the femoral stem prosthesis 1is implanted into the femur, the biological fixed columns 14 can extend into original bones to improve the stability of the femoral stem prosthesis 1 after implantation.
The positioning column 11 and the biological fixing column 14 are formed by mixing and printing titanium powder and tantalum powder, and the positioning column 11 and the biological fixing column 14 have good corrosion resistance and biocompatibility due to the mixing of the titanium powder and the tantalum powder, can provide good initial stability for bone ingrowth, and are excellent biological fixing interfaces. Meanwhile, the porous bone trabecula structure has the same honeycomb-shaped three-dimensional structure as the human cancellous bone structure, namely the porous bone trabecula structure imitating human cancellous bone, the structure is convenient for promoting cell proliferation, improving the bone making capability of osteoblasts, having good promoting effect on bone growth, being capable of enabling the positioning column 11, the biological fixing column 14 and the femur to grow into a whole, improving long-term stability, effectively solving the problem of poor long-term stability of the biological fixing bone growth interface in the current market, and being an innovation in the technical field of 3D printing.
Referring to fig. 2, due to the special structural design of the femoral stem prosthesis 1, the positioning column 11 can achieve the same effect as the current femoral stem body through a shorter length, so that the original bone of a patient is better reserved, and a foundation is laid for subsequent repair.
Referring to fig. 1 and 2, two first through holes 15 penetrating radially are formed in the positioning column 11, the two first through holes 15 are arranged side by side along the length direction of the positioning column 11, three second through holes 16 penetrating in the thickness direction of the positioning column 11 are formed in the bionic fixed support seat 12, the three second through holes 16 are arranged in a triangular shape, holes are formed in positions, corresponding to the two first through holes 15, of a femur of a patient during operation, and then the femur is bound with the femur through holes, the first through holes 15 and the second through holes 16 in the femur through the binding belt 5, so that secondary fixation is achieved.
The triangular arrangement of the three second through holes 16 enables medical staff to perform triangular fixation on the femoral stem prosthesis 1 through the binding belt 5 in the threading process, and the stability is higher.
Referring to fig. 1, the femoral head 2 is assembled to the femoral neck 13 by a taper fit. More specifically, the femoral head 2 is processed by ceramic composite materials, so that the ceramic composite material has better mechanical properties, extremely low breakage rate and greatly prolonged service life of the femoral head 2.
The acetabular liner 4 is processed by ultra-high molecular weight polyethylene mixed with vitamin E, has higher oxidation resistance stability and wear resistance, can effectively reduce dislocation risk and prolongs service life.
Referring to fig. 3, the acetabular cup 3 comprises an inner shell 31, an outer shell 32 and three protrusions 33 which are arranged on the outer shell 32 and used for simulating titanium nails, wherein the protrusions 33 are of a porous bone trabecular structure simulating human cancellous bone, and the acetabular liner 4 is installed in the acetabular cup 3 and closely attached to the inner wall of the inner shell 31. More specifically, the inner shell 31 is a solid structure processed by titanium alloy and is mainly used for ensuring the structural strength of the acetabular cup 3, the outer shell 32 is a human cancellous bone-imitated porous trabecular structure formed by mixing and printing titanium powder and tantalum powder so as to facilitate bone growth, and the protrusions 33 are embedded into cancellous bone in a press fit manner during implantation so as to fix the acetabular cup 3.
The femoral stem prosthesis 1 and the acetabular cup 3 which are processed through 3D printing can be matched with the femur and the acetabular fossa of a patient in height, the success rate of operation is greatly improved, the stability and the firmness of the prosthesis after implantation are greatly improved through a bone ingrowth and binding dual fixing mode, the same effect as that of the existing femoral stem body can be achieved through the positioning column 11 through the special structural design of the femoral stem prosthesis 1, the original bone of the patient is better reserved for repairing, the traditional titanium nails are replaced through the protrusions 33, the acetabular cup 3 can be fixed under the condition of no holes, the bone dissolving risk caused by abrasive dust flowing out of holes is greatly reduced, and the safety of clinical use is improved.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.

Claims (8)

1. A total hip replacement prosthesis is characterized by comprising a femoral stem prosthesis (1), a femoral head (2) arranged on the femoral stem prosthesis (1), an acetabular cup (3) matched with the femoral head (2), and an acetabular liner (4) positioned in the acetabular cup (3) and directly contacted with the femoral head (2);
The femoral stem prosthesis (1) comprises a positioning column (11), a bionic fixed support seat (12) fixedly connected to one end of the positioning column (11), and a femoral neck (13) fixedly connected to one side of the bionic fixed support seat (12) far away from the positioning column (11), wherein the femoral head (2) is assembled on the femoral neck (13);
The positioning column (11) is of a porous bone trabecula structure imitating human cancellous bone;
the bionic fixed support seat (12) is disc-shaped, a plurality of biological fixed columns (14) which are used for extending into original bones are uniformly distributed on one side of the bionic fixed support seat, which is close to the positioning column (11), and the biological fixed columns (14) are of a porous bone trabecula structure imitating human cancellous bone;
Also comprises a binding band (5);
the positioning column (11) is provided with a first through hole (15) which is penetrated along the radial direction of the positioning column, the bionic fixed support seat (12) is provided with a second through hole (16) which is penetrated along the thickness direction of the bionic fixed support seat, and the binding belt (5) is fixed with the femur through the first through hole (15) and the second through hole (16).
2. A total hip replacement prosthesis according to claim 1, characterized in that the number of the first through holes (15) is two, the number of the second through holes (16) is three, and the three second through holes (16) are arranged in a triangle.
3. A total hip replacement prosthesis according to claim 1, characterized in that the femoral stem prosthesis (1) and the acetabular cup (3) are integrally formed by 3D printing.
4. A total hip replacement prosthesis according to claim 3, characterized in that the acetabular cup (3) comprises an inner shell (31), an outer shell (32) and a plurality of projections (33) provided on the outer shell (32) for simulating titanium nails.
5. A total hip replacement prosthesis according to claim 4, wherein the inner shell (31) has a solid structure and the outer shell (32) has a porous bone trabecular structure imitating human cancellous bone.
6. A total hip replacement prosthesis according to claim 4, wherein the number of projections (33) is three.
7. A total hip replacement prosthesis according to claim 1, characterized in that the acetabular liner (4) is processed from ultra high molecular weight polyethylene blended with vitamin E.
8. A total hip replacement prosthesis according to claim 1, characterized in that the femoral head (2) is machined from a ceramic composite material.
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CN113456304B (en) * 2021-05-20 2024-08-20 北京中安泰华科技有限公司 3D prints double-acting high wear-resisting full hip joint system
CN113367849A (en) * 2021-05-31 2021-09-10 北京力达康科技有限公司 Double-acting total hip system

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CN111870403A (en) * 2020-08-14 2020-11-03 北京力达康科技有限公司 Combined three-action total hip prosthesis
CN214712937U (en) * 2021-01-05 2021-11-16 北京力达康科技有限公司 Total hip replacement prosthesis

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