CN112245067A - Spongy bone reconstruction cap-shaped prosthesis - Google Patents
Spongy bone reconstruction cap-shaped prosthesis Download PDFInfo
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- CN112245067A CN112245067A CN202011250800.0A CN202011250800A CN112245067A CN 112245067 A CN112245067 A CN 112245067A CN 202011250800 A CN202011250800 A CN 202011250800A CN 112245067 A CN112245067 A CN 112245067A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 49
- 239000007787 solid Substances 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 6
- 238000010146 3D printing Methods 0.000 claims description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- 239000002639 bone cement Substances 0.000 abstract description 23
- 210000000689 upper leg Anatomy 0.000 abstract description 14
- 230000007774 longterm Effects 0.000 abstract description 10
- 208000010392 Bone Fractures Diseases 0.000 abstract description 6
- 206010017076 Fracture Diseases 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009418 renovation Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 208000015181 infectious disease Diseases 0.000 description 3
- 238000007634 remodeling Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002591 computed tomography Methods 0.000 description 2
- 210000001624 hip Anatomy 0.000 description 2
- 238000011540 hip replacement Methods 0.000 description 2
- 230000005541 medical transmission Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 208000037408 Device failure Diseases 0.000 description 1
- 208000003076 Osteolysis Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 206010069135 Periprosthetic fracture Diseases 0.000 description 1
- 208000037099 Prosthesis Failure Diseases 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 206010003246 arthritis Diseases 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 210000001185 bone marrow Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 210000003275 diaphysis Anatomy 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 210000004394 hip joint Anatomy 0.000 description 1
- 230000000642 iatrogenic effect Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000029791 lytic metastatic bone lesion Diseases 0.000 description 1
- 238000010883 osseointegration Methods 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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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
- A61F2/28—Bones
- A61F2/2846—Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4601—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
-
- 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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip 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
Landscapes
- Health & Medical Sciences (AREA)
- Transplantation (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a cancellous bone reconstruction cap-shaped prosthesis, which comprises a cap-shaped body, wherein the body comprises a rim part which is positioned at the near end and is turned outwards, and a hollow cap body part which is formed by extending from the inner periphery of the rim part to the far end; porous structures are formed on the inner and outer surfaces of the hollow cap body. The porous structure on the outer surface of the hollow cap body part can obtain bone ingrowth, so that the reconstructed prosthesis can obtain a long-term biological fixation foundation, the fixation strength of the long-term femur-reconstructed prosthesis is improved, and the risk of fracture around the long-term prosthesis is reduced; the micro-twist lock is formed between the inner surface of the hollow cap body and the bone cement femoral prosthesis, the initial fixing effect of the bone cement femoral stem is improved, the success rate of the bone cement femoral prosthesis renovation is improved, the edge part of the body is tightly pressed on the bone surface of the fractured end of the cortex of the femur, the stress is transmitted to the femur from the reconstructed prosthesis, the bone cement femoral stem is prevented from sinking into the medullary cavity, and the overall reconstruction strength of the rest femur-prosthesis can be improved.
Description
Technical Field
The invention relates to a magic cap-shaped prosthesis for reconstructing cancellous bone in femoral bone marrow cavity, belonging to the field of medical instruments.
Background
Artificial hip replacement is an effective means for treating various terminal coxitis. Artificial hip arthroplasty is a procedure to treat various artificial hip replacement failures. Due to severe osteolysis, stress shielding, infection around the prosthesis, multiple surgical history, osteoporosis, iatrogenic bone defects caused by perforation or windowing when the original prosthesis or residual bone cement is taken out and the like caused by loosening or abrasion, the femur side is often subjected to bone defects of different degrees in the artificial hip revision surgery. The difficulty in reconstruction is that there is often a severe bone defect on the femoral side, and the femur often incorporates proximal anatomical remodeling during revision, such as varus or retroversion remodeling. Thus, the femoral side bone defect reconstruction strategy is determined based on the severity of the bone defect, the amount and quality of bone remaining, and anatomical remodeling changes.
Many scholars have proposed the typing of femoral side bone defects, the most widely used type being the Paprosky type, which takes into account the three factors of bone defect site (metaphysis or diaphysis), residual bone mass and support of the proximal femur, and the length of the isthmus of the shaft available for distal fixation. The physician can objectively assess the femoral bone defect based on the typing and select an appropriate reconstruction method based on the defect typing. For severe femoral bone defects, particularly for bone defects caused by the fact that a medullary cavity forms a horn-shaped structure expanding downwards or the medullary cavity of the femur expands to form a chimney-pipe shape (chimney-pipe shape), a bone-free stem isthmus is used for fixing a femoral stem, and at present, traditional reconstruction methods such as assembling a conical ridged titanium stem, pressing bone grafting, proximal femoral allograft bone-prosthesis compound and proximal femoral replacement can be selected. The incidence of early prosthesis subsidence after the operation of assembling the conical titanium handle with the ridge is higher, the risk of fracture in the operation or after the operation is increased, and a series of complications such as stress concentration, stress shielding, insufficient effective fixed length, unstable prosthesis fixation and the like can be caused. Proximal femoral allograft bone-prosthesis composites present potential risks of disease transmission, resorption and nonunion of the graft, aseptic loosening, periprosthetic fractures and infection. The proximal femoral replacement dislocation rate is high and the long-term survival rate is low, and is only suitable for treating the elderly patients with low activity and a great deal of serious bone defects. The pressing bone grafting has the potential of reconstructing the bone mass of a patient in theory, but has the defects of higher risks of fracture in operation, postoperative prosthesis sinking and the like, higher technical requirements of the operation, time consumption, risk of disease transmission, bone grafting absorption and the like.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a cancellous bone reconstruction magic cap-shaped prosthesis for treating severe femoral bone defects, which is used for solving the problems of high cement prosthesis failure rate, poor reconstruction curative effect and the like caused by the fact that bone cement cannot form enough micro-twistlocks in femoral medullary cavities in the existing reconstruction method.
In order to achieve the above object, the present invention adopts the following technical solution, a cancellous bone reconstruction cap-shaped prosthesis, comprising a cap-shaped body, wherein the body comprises a rim portion which is positioned at a proximal end and is turned outwards, and a hollow cap body portion which is formed by extending from an inner periphery of the rim portion to a distal end; porous structures are formed on the inner and outer surfaces of the hollow cap body.
In some embodiments, the hollow cap body has a solid layer between the inner and outer surfaces, the solid layer having a thickness of 1-10 mm.
In some embodiments, the cross-section of the inner surface of the hollow cap body is circular or elliptical, and the coronal section of the inner surface of the hollow cap body is rectangular or trapezoidal; the cross section of the outer surface of the hollow cap body part is circular or oval, and the section of the coronal surface of the outer surface of the hollow cap body part is rectangular or trapezoidal.
In some embodiments, the hollow cap body is hollow cylindrical, the hollow cylindrical shape having an inner diameter of 0.8cm to 6cm and an outer diameter of 1.2cm to 6.4 cm;
or when the hollow cap body part is in a hollow conical shape, the taper is 0-30 degrees, the inner diameter of the large end of the hollow conical shape is 0.8-6 cm, and the outer diameter of the large end is 1.2-6.4 cm.
In some embodiments, the hollow cap body has a height of 1cm to 10cm and a thickness of 1mm to 20 mm.
In some embodiments, the upper and lower surfaces of the rim portion have a porous structure formed thereon, and the interior of the rim portion has a solid interlayer.
In some embodiments, the rim portion has a width of 2mm to 15mm and a thickness of 2mm to 30 mm.
In some embodiments, the porous structure is a trabecular bone-like porous structure with a pore size of 800 μm ± 200 μm and a porosity of 50% to 80%.
In some embodiments, the body is formed by 3D printing, and the material is titanium alloy or tantalum metal.
By adopting the technical scheme, the invention has the following advantages: the spongy bone reconstruction cap-shaped prosthesis comprises a body consisting of a rim part and a hollow cap body part, wherein a porous structure is formed on the inner surface and the outer surface of the hollow cap body part, and the porous structure on the outer surface of the hollow cap body part can obtain bone ingrowth, so that the reconstruction prosthesis can obtain a long-term biological fixation foundation, the fixation strength of a long-term femur-reconstruction prosthesis is improved, and the risk of fracture around the long-term prosthesis is reduced; the bone cement can permeate into the porous structure on the inner surface of the hollow cap body, the bone cement forms a micro-twist lock between the inner surface of the hollow cap body and the bone cement femoral prosthesis, the initial fixing effect of the bone cement femoral stem is improved, the success rate of the revision of the bone cement femoral prosthesis is improved, the edge part of the body is tightly pressed on the bone surface of the fractured end of the femoral cortex, the stress is transmitted to the femur from the reconstructed prosthesis, the bone cement femoral stem is prevented from sinking into the medullary cavity, and the overall reconstruction strength of the rest femur-prosthesis can be improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic structural view of the present invention;
fig. 3 is a schematic sectional view of the hollow cap body according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.
As shown in fig. 1 and fig. 2, the cancellous bone reconstruction cap prosthesis provided by the present embodiment includes a cap-shaped body 1, the body 1 includes a rim portion 100 located at a proximal end and turned outwards, and a hollow cap body portion 200 extending from an inner periphery of the rim portion 100 to a distal end; the hollow cap body 200 has a porous structure formed on the inner and outer surfaces thereof.
When the reconstruction prosthesis provided by the embodiment is used, the hollow cap body part 200 of the body 1 is driven into a femoral medullary cavity, the outer surface of the hollow cap body part 200 is in press fit with the inner wall of the femoral medullary cavity, and the porous structure on the outer surface of the hollow cap body part 200 can obtain bone ingrowth, so that the reconstruction prosthesis can obtain a long-term biological fixation foundation, improve the fixation strength of a long-term femur-reconstruction prosthesis and reduce the risk of fracture around the long-term prosthesis; the edge part 100 of the body 1 is tightly pressed on the fracture surface of the cortex of the femur, so that stress is transmitted to the femur from the reconstructed prosthesis, the bone cement femoral stem is prevented from sinking into a medullary cavity, the overall reconstruction strength of the rest femur-prosthesis can be improved, the bone cement can permeate into a porous structure on the inner surface of the hollow cap body part 200, the bone cement forms a micro-twist lock between the inner surface of the hollow cap body part 200 and the bone cement femoral prosthesis, the initial fixing effect of the bone cement femoral stem is improved, and the success rate of the reconstruction of the bone cement femoral prosthesis is improved. Artificial bone or coating material that promotes bone ingrowth may be sprayed into the porous structure on the outer surface of the hollow cap body 200, thereby stimulating osseointegration into the porous surface; alternatively, the porous structures on the inner and outer surfaces of the hollow cap body 200 are filled with antibiotic drugs or antimicrobial materials or coatings for preventing periprosthetic infection or promoting bone ingrowth.
In the above embodiment, preferably, as shown in fig. 3, a solid layer is arranged between the inner surface and the outer surface of the hollow cap body part 200, the thickness of the solid layer is 1-10 mm, so that the bone cement is prevented from permeating into the outer surface from the inner surface, and the bone cement is prevented from influencing the bone ingrowth potential of the outer surface.
In the above embodiment, preferably, the cross-section of the inner surface of the hollow cap body 200 may be circular or elliptical, and the coronal section of the inner surface of the hollow cap body 200 may be rectangular or trapezoidal; the cross-section of the outer surface of the hollow cap body 200 may be circular or elliptical, and the coronal section of the outer surface of the hollow cap body 200 may be rectangular or trapezoidal.
In the above embodiment, preferably, the hollow cap body 200 has a hollow cylindrical shape or a hollow conical shape, and when the hollow cap body 200 has a hollow cylindrical shape, the inner diameter is 0.8cm to 6cm, preferably 1cm to 2.5cm, and the outer diameter is 1.2cm to 6.4 cm; when the hollow cap body part 200 is in a hollow conical shape, the taper is 0-30 degrees, preferably 1-15 degrees, the inner diameter of the large end of the hollow conical shape is 0.8-6 cm, preferably 1-2.5 cm, the outer diameter of the large end is 1.2-6.4 cm, preferably 1.4-3 cm, and the height of the hollow cap body part 200 is 1-10 cm, preferably 1.2-5 cm; the thickness is 1mm to 20mm, preferably 2mm to 6 mm.
In the above embodiment, it is preferable that the upper and lower surfaces of the rim portion 100 have a porous structure formed thereon, and the inside of the rim portion 100 has a solid interlayer.
In the above embodiment, preferably, the porous structure is a trabecular bone-like porous structure, the pore diameter is 800 μm ± 200 μm, and the porosity is 50% -80%.
In the above embodiment, the body 1 may be formed by 3D printing, and the material may be titanium alloy or tantalum metal.
In the above embodiment, the width of the rim portion 100 is preferably 2mm to 15mm, more preferably 3mm to 10 mm; the thickness of the edge portion 100 is 2mm to 30mm, preferably 2mm to 10 mm.
The implantation process of the spongy bone reconstruction cap prosthesis of the invention is as follows:
1) acquiring CT (computed tomography) examination data of hip joints on the affected side and the healthy side of a patient before operation; reconstructing the shape of the femur by using a computer, selecting a cancellous bone reconstruction cap-shaped prosthesis with a proper specification, or customizing the cancellous bone reconstruction cap-shaped prosthesis according to the 3D printing of the patient specific medullary cavity structure;
2) performing preoperative planning according to the bone cement femoral prosthesis form;
3) exposing the femur to be reconstructed in an operation, performing reaming of a femoral medullary cavity, and filing the femoral medullary cavity to a preset size;
4) the spongy bone reconstruction cap-shaped prosthesis is driven into the femur osteotomy end planned before the operation in the medullary cavity of the femur by using a special instrument, so that the spongy bone reconstruction cap-shaped prosthesis is pressed and fixed in the medullary cavity, and meanwhile, the edge part of the cap-shaped prosthesis is just tightly pressed and fitted at the femur osteotomy end;
5) bone cement is poured into the medullary cavity to infiltrate into the porous structure on the cap-shaped prosthesis, and then the bone cement femoral stem is implanted.
The present invention has been described with reference to the above embodiments, and the structure, arrangement, and connection of the respective members may be changed. On the basis of the technical scheme of the invention, the improvement or equivalent transformation of the individual components according to the principle of the invention is not excluded from the protection scope of the invention.
Claims (9)
1. A cancellous bone reconstruction cap prosthesis characterized by: the cap-shaped body comprises a rim part which is positioned at the proximal end and is turned outwards, and a hollow cap body part which is formed by extending from the inner periphery of the rim part to the distal end; porous structures are formed on the inner and outer surfaces of the hollow cap body.
2. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: a solid layer is arranged between the inner surface and the outer surface of the hollow cap body, and the thickness of the solid layer is 1-10 mm.
3. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: the cross section of the inner surface of the hollow cap body part is circular or oval, and the section of the coronal surface of the inner surface of the hollow cap body part is rectangular or trapezoidal; the cross section of the outer surface of the hollow cap body part is circular or oval, and the section of the coronal surface of the outer surface of the hollow cap body part is rectangular or trapezoidal.
4. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: the hollow cap body part is in a hollow cylindrical shape, the inner diameter of the hollow cylindrical shape is 0.8 cm-6 cm, and the outer diameter of the hollow cylindrical shape is 1.2 cm-6.4 cm;
or when the hollow cap body part is in a hollow conical shape, the taper is 0-30 degrees, the inner diameter of the large end of the hollow conical shape is 0.8-6 cm, and the outer diameter of the large end is 1.2-6.4 cm.
5. A cancellous bone reconstruction cap prosthesis according to any one of claims 1 to 4 wherein: the height of the hollow cap body part is 1 cm-10 cm, and the thickness of the hollow cap body part is 1 mm-20 mm.
6. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: porous structures are formed on the upper surface and the lower surface of the edge part, and a solid interlayer is arranged inside the edge part.
7. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: the width of the edge part is 2 mm-15 mm, and the thickness is 2 mm-30 mm.
8. The cancellous bone reconstruction cap prosthesis of claim 1 or 6 wherein: the porous structure is a bone-like trabecula porous structure, the aperture is 800 microns +/-200 microns, and the porosity is 50-80%.
9. A cancellous bone reconstruction cap prosthesis according to claim 1 wherein: the body is formed by 3D printing and made of titanium alloy or tantalum metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011250800.0A CN112245067A (en) | 2020-11-11 | 2020-11-11 | Spongy bone reconstruction cap-shaped prosthesis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011250800.0A CN112245067A (en) | 2020-11-11 | 2020-11-11 | Spongy bone reconstruction cap-shaped prosthesis |
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|---|---|
| CN112245067A true CN112245067A (en) | 2021-01-22 |
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| CN202011250800.0A Pending CN112245067A (en) | 2020-11-11 | 2020-11-11 | Spongy bone reconstruction cap-shaped prosthesis |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488716B1 (en) * | 1999-07-30 | 2002-12-03 | Guofu Huang | Anatomic femoral prosthesis for total hip arthroplasty |
| US20080004711A1 (en) * | 2006-06-28 | 2008-01-03 | Xue Li | An external proximal femoral prosthesis for total hip arthroplasty |
| CN101601614A (en) * | 2008-06-03 | 2009-12-16 | 德普伊产品公司 | Porous titanium tibial sleeves and they use in repair of knee joint |
| US20100168866A1 (en) * | 2008-12-26 | 2010-07-01 | Grant Lu-Sun Shih | Femoral head prosthesis assembly and operation instruments thereof |
| CN214017990U (en) * | 2020-11-11 | 2021-08-24 | 北京积水潭医院 | Spongy bone reconstruction cap-shaped prosthesis |
-
2020
- 2020-11-11 CN CN202011250800.0A patent/CN112245067A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6488716B1 (en) * | 1999-07-30 | 2002-12-03 | Guofu Huang | Anatomic femoral prosthesis for total hip arthroplasty |
| US20080004711A1 (en) * | 2006-06-28 | 2008-01-03 | Xue Li | An external proximal femoral prosthesis for total hip arthroplasty |
| CN101601614A (en) * | 2008-06-03 | 2009-12-16 | 德普伊产品公司 | Porous titanium tibial sleeves and they use in repair of knee joint |
| US20100168866A1 (en) * | 2008-12-26 | 2010-07-01 | Grant Lu-Sun Shih | Femoral head prosthesis assembly and operation instruments thereof |
| CN214017990U (en) * | 2020-11-11 | 2021-08-24 | 北京积水潭医院 | Spongy bone reconstruction cap-shaped prosthesis |
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