CN111467087A - 3D prints porous thighbone near-end arc intramedullary handle in surface - Google Patents
3D prints porous thighbone near-end arc intramedullary handle in surface Download PDFInfo
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- CN111467087A CN111467087A CN202010420944.XA CN202010420944A CN111467087A CN 111467087 A CN111467087 A CN 111467087A CN 202010420944 A CN202010420944 A CN 202010420944A CN 111467087 A CN111467087 A CN 111467087A
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- bone
- printed surface
- intramedullary
- surface porous
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- 210000001694 thigh bone Anatomy 0.000 title description 3
- 239000011148 porous material Substances 0.000 claims abstract description 18
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 10
- 238000010146 3D printing Methods 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 210000001185 bone marrow Anatomy 0.000 claims description 4
- 210000002436 femur neck Anatomy 0.000 claims description 4
- 210000000689 upper leg Anatomy 0.000 abstract description 18
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000527 greater trochanter Anatomy 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000000528 lesser trochanter Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001613 neoplastic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000472 traumatic effect Effects 0.000 description 1
Images
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
- A61F2/36—Femoral heads ; Femoral endoprostheses
-
- 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
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0008—Fixation appliances for connecting prostheses to the body
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (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 surface porous proximal femur arc intramedullary handle, comprising: a medullary needle part and a connecting part; the intramedullary nail part is arc-shaped, the base of the intramedullary nail part is fixedly connected with the connecting part, the intramedullary nail part comprises a central solid part and an outer bone-imitating layer, the bone-imitating layer is of a bone trabecula structure, and a plurality of pores are formed in the bone-imitating layer. The invention is perfectly matched with the proximal medullary cavity of the femur, accords with the biomechanics of the femur, and solves the problem of reconstruction of the defect close to the proximal femur.
Description
Technical Field
The invention relates to the field of medical instrument research, in particular to a 3D printing surface porous proximal femur arc intramedullary handle.
Background
For the neoplastic or traumatic defect of the upper or middle segment of the femur, the conventional treatment means is hip joint replacement, assembled osteotomy segment sleeving and femoral bone marrow needle. Due to the limitation of the treatment method, the vertical length of the residual bone at the proximal femur is not enough to fix the conventional broach, so a series of structures including the greater trochanter, the lesser trochanter and the femoral head at the proximal end of the femur have to be resected and replaced by related prosthesis, which causes unnecessary damage to the normal mechanism and seriously affects the function and recovery after the operation.
Disclosure of Invention
The invention aims to provide a 3D printing surface porous proximal femur arc intramedullary handle which is perfectly matched with a proximal femur intramedullary canal, accords with the biomechanics of the femur, and solves the problem of reconstruction of defects close to the proximal femur.
In order to achieve the above object, the present invention provides the above 3D printed surface porous proximal femur arc intramedullary stem, comprising: a medullary needle part and a connecting part; the intramedullary nail part is arc-shaped, the base of the intramedullary nail part is fixedly connected with the connecting part, the intramedullary nail part comprises a central solid part and an outer bone-imitating layer, the bone-imitating layer is of a bone trabecula structure, and a plurality of pores are formed in the bone-imitating layer.
Preferably, the pores are arranged in a multi-layer mode from outside to inside, the pore diameter of each pore is gradually reduced from outside to inside, and the porosity of the bone-like layer is gradually reduced from outside to inside.
Preferably, the radial dimension of the intramedullary nail part is gradually reduced from the base to the tail end.
Further, the radian of the outer side edge of the intramedullary nail part is larger than that of the inner side edge.
Preferably, the base of the intramedullary nail part is provided with an arc wing-shaped protruding structure.
Preferably, the extension length of the marrow needle part is 80mm-100mm, and the bending radian of the marrow needle part is matched with the angle of the femoral neck shaft.
Preferably, the distal end of the intramedullary nail portion is polished.
Preferably, the pith portion and the connecting portion are made of a titanium alloy material.
Preferably, the intramedullary pin part and the connecting part are integrally manufactured by 3D printing.
Preferably, the thickness of the imitated bone layer is 5 mm.
The invention has the following beneficial effects:
1. the invention is perfectly matched with the proximal medullary cavity of the femur;
2. the artificial bone layer is arranged, so that the artificial bone layer accords with the biomechanics of the thighbone;
3. the difficult problem of defect reconstruction near the proximal end of the femur is solved.
Drawings
FIG. 1 is a schematic view of a radial cross-sectional structure of the present invention;
FIG. 2 is an enlarged partial view of a radial cross-section of the broach portion;
in the figure: 1-medullary needle part, 101-solid part, 102-bone-imitating layer, 103-pore and 2-connecting part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
The invention discloses a 3D printing surface porous proximal femur arc intramedullary handle, which comprises: a medullary needle part 1 and a connecting part 2; the marrow needle part 1 is arc-shaped, the base part of the marrow needle part 1 is fixedly connected with the connecting part 2, the marrow needle part 1 comprises a central solid part 101 and an outer bone-imitating layer 102, the bone-imitating layer 102 is of a bone trabecula structure, and the bone-imitating layer 102 is provided with a plurality of pores 103.
Preferably, the pores 103 are arranged in a multi-layer manner from outside to inside, the pore diameter of the pores 103 gradually decreases from outside to inside, and the porosity of the bone-like layer 102 gradually decreases from outside to inside.
Preferably, the radial dimension of the intramedullary nail part 1 is gradually reduced from the base to the end.
Further, the radian of the outer edge of the intramedullary nail part 1 is larger than that of the inner edge.
Preferably, the base of the intramedullary nail part 1 is provided with an arc-shaped wing-shaped protruding structure.
Preferably, the extension length of the marrow needle part 1 is 80mm-100mm, and the bending radian of the marrow needle part 1 is matched with the angle of the femoral neck trunk.
Preferably, the end of the intramedullary nail portion 1 is polished.
Preferably, the pith part 1 and the connecting part 2 are made of titanium alloy material.
Preferably, the intramedullary nail part 1 and the connecting part 2 are integrally manufactured by 3D printing.
Preferably, the thickness of the imitated bone layer 102 is 5 mm.
The specific implementation process comprises the following steps: printing out a broach part 1 and a connecting part 2 matched with a patient by adopting a 3D printing technology according to the specific condition of the patient; the pith part 1 and the connecting part 2 are made of titanium alloy materials, so that the corrosion resistance is high, and the service life of the whole body is prolonged; the extension length of the intramedullary nail part 1 is 80mm-100mm, the bending radian of the intramedullary nail part 1 is matched with the angle of the femoral neck stem, and different designs are adopted for people of different ages, sexes and heights; the base part of the marrow needle part 1 is fixedly connected with the connecting part 2, the marrow needle part 1 comprises a central solid part 101 and an outer bone-imitating layer 102, the bone-imitating layer 102 is provided with a plurality of pores 103, the thickness of the bone-imitating layer 103 is 5mm, the pores 103 of the bone-imitating layer 102 are arranged in a multi-layer mode from outside to inside, the pore diameter of the pores 103 is gradually reduced from outside to inside, and the porosity of the bone-imitating layer 102 is gradually reduced from outside to inside, so that the marrow needle part meets the biomechanical characteristics of a femur; the radian of the outer side edge of the intramedullary nail part 1 is larger than that of the inner side edge, so that when the intramedullary nail part 1 is placed in a proximal medullary cavity of a femur, the outer side edge of the tail end of the intramedullary nail part 1 is more stressed, and the whole connecting part 2 is close to the inner cortex; the radial dimension of the intramedullary nail part 1 is gradually reduced from the base to the tail end, so that the intramedullary nail part can be pressurized along with the increase of the implantation depth when being implanted, and the stability of the connecting part 2 in the fixing process is increased; the base part of the medullary needle part 1 is provided with a wing-shaped protruding structure which plays a role of rotation prevention; the broach in the present invention may also be matched with a conventional femoral osteotomy or femoral medullary needle.
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 (10)
1. A3D printed surface porous proximal femoral curved intramedullary stem comprising: a medullary needle part (1) and a connecting part (2); the bone marrow needle part (1) is arc-shaped, the base part of the bone marrow needle part (1) is fixedly connected with the connecting part (2), the bone marrow needle part (1) comprises a central solid part (101) and an outer bone-imitated layer (102), the bone-imitated layer (102) is of a bone trabecula structure, and a plurality of pores (103) are formed in the bone-imitated layer (102).
2. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the pores (103) are arranged in a multi-layer mode from outside to inside, the pore diameter of the pores (103) is gradually reduced from outside to inside, and the porosity of the bone-like layer (102) is gradually reduced from outside to inside.
3. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the radial dimension of the intramedullary nail part (1) is gradually reduced from the base to the tail end.
4. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 3, wherein: the radian of the outer side edge of the intramedullary nail part (1) is larger than that of the inner side edge.
5. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the base of the medullary needle part (1) is provided with an arc wing-shaped protruding structure.
6. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the extension length of the marrow needle part (1) is 80-100 mm, and the bending radian of the marrow needle part (1) is matched with the angle of the femoral neck stem.
7. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the end of the intramedullary nail part (1) is polished.
8. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the pith part (1) and the connecting part (2) are made of titanium alloy materials.
9. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the pith part (1) and the connecting part (2) are integrally manufactured by adopting 3D printing.
10. The 3D printed surface porous femoral proximal arcuate intramedullary stem of claim 1, wherein: the thickness of the imitated bone layer (102) is 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420944.XA CN111467087A (en) | 2020-05-18 | 2020-05-18 | 3D prints porous thighbone near-end arc intramedullary handle in surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010420944.XA CN111467087A (en) | 2020-05-18 | 2020-05-18 | 3D prints porous thighbone near-end arc intramedullary handle in surface |
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| Publication Number | Publication Date |
|---|---|
| CN111467087A true CN111467087A (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010420944.XA Pending CN111467087A (en) | 2020-05-18 | 2020-05-18 | 3D prints porous thighbone near-end arc intramedullary handle in surface |
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| CN (1) | CN111467087A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113974914A (en) * | 2020-08-27 | 2022-01-28 | 北京力达康科技有限公司 | Femoral prosthesis for retaining femoral head |
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| CN2436115Y (en) * | 2000-02-28 | 2001-06-27 | 曹斌 | Femoral intramedullary nail |
| US20040102854A1 (en) * | 2002-11-22 | 2004-05-27 | Mengke Zhu | Implantable orthopedic prosthesis with textured polymeric surfaces |
| CN205903332U (en) * | 2016-04-11 | 2017-01-25 | 四川大学华西医院 | 3D prints imitative porous bearing of bone trabecula reinforcing metal false body |
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| CN109199643A (en) * | 2018-04-26 | 2019-01-15 | 四川大学华西医院 | Assembly type protects ankle and protects knee tibial shaft prosthese |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113974914A (en) * | 2020-08-27 | 2022-01-28 | 北京力达康科技有限公司 | Femoral prosthesis for retaining femoral head |
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