CN109662808B - Hip joint prosthesis - Google Patents
Hip joint prosthesis Download PDFInfo
- Publication number
- CN109662808B CN109662808B CN201910154440.5A CN201910154440A CN109662808B CN 109662808 B CN109662808 B CN 109662808B CN 201910154440 A CN201910154440 A CN 201910154440A CN 109662808 B CN109662808 B CN 109662808B
- Authority
- CN
- China
- Prior art keywords
- ceramic
- ceramic plates
- group
- ball head
- backing
- 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
Links
- 210000004394 hip joint Anatomy 0.000 title claims abstract description 27
- 239000000919 ceramic Substances 0.000 claims abstract description 145
- 238000005299 abrasion Methods 0.000 claims abstract description 13
- 230000001965 increasing effect Effects 0.000 claims abstract description 13
- 229920000642 polymer Polymers 0.000 claims description 28
- 210000001124 body fluid Anatomy 0.000 claims description 8
- 239000010839 body fluid Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 210000001624 hip Anatomy 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910001362 Ta alloys Inorganic materials 0.000 claims 1
- 229910001069 Ti alloy Inorganic materials 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 11
- 238000005336 cracking Methods 0.000 abstract description 4
- 229910021645 metal ion Inorganic materials 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 210000000588 acetabulum Anatomy 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 3
- 206010023204 Joint dislocation Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 208000017667 Chronic Disease Diseases 0.000 description 1
- 208000023803 Hip injury Diseases 0.000 description 1
- 238000011882 arthroplasty Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 230000008467 tissue growth Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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
- 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
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30362—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
- A61F2002/30375—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess with an intermediate bushing or sleeve between the moving parts
-
- 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
- A61F2002/30451—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
-
- 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
- A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
-
- 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
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/30673—Lubricating means, e.g. synovial pocket
-
- 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
- A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
-
- 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
- A61F2310/00179—Ceramics or ceramic-like structures
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 hip joint prosthesis, which comprises a ball head and a spherical crown-shaped backing, wherein a ceramic plate used for reducing abrasion between the backing and the ball head is arranged on the inner side of the backing, the bottom ends of the ceramic plates are welded with the inner side of the backing, the ceramic plates are a group of ceramic plates which are distributed, and the outer concave curved surface of the ceramic plates is in contact with the outer surface of the ball head to form a friction pair. Or the ball bearing comprises a ball bearing, and is characterized by further comprising a ceramic plate and a supporting body, wherein the ceramic plate is a group of ceramic plates, the group of ceramic plates are distributed on the supporting body, a groove is formed in the inner side of the backing, the groove is used for accommodating the supporting body, and the outer concave curved surface of the ceramic plate is contacted with the outer surface of the ball head to form a friction pair. The abrasion between the backing and the ball head is reduced, the ceramic cracking risk is reduced, the metal ion release is reduced, the artificial hip joint movement range is increased, and the service life of the hip joint prosthesis is prolonged.
Description
Technical Field
The invention relates to the technical field of biomedical engineering orthopedic implant prostheses, in particular to a hip joint prosthesis.
Background
Artificial hip arthroplasty is an effective clinical treatment for hip injuries caused by trauma or disease. The artificial hip joint system consists of an acetabulum, a joint handle and a ball head. The common acetabulum consists of a metal lining and a lining, wherein the lining material is metal, ceramic and high polymer material, and the ball head material is metal and ceramic. The ball head contacts with the lining to form a pair of friction pairs.
The artificial hip joints currently used clinically are of the following types: 1. the metal ball head and the metal lining are matched, toxic metal ions are separated out in a long-term friction and abrasion process of the friction pair formed by the matched pair, chronic diseases can be caused when the toxic metal ions are accumulated to a certain concentration in a human body, and meanwhile, bone tissues around the prosthesis can be induced to be osteolyzed by abrasion fragments; 2. the friction pair formed by the metal or ceramic ball head and the high polymer lining is used for leading the wear rate of the high polymer lining to be very high, the most common high polymer material is ultra-high molecular weight polyethylene, the annual wear amount of the ultra-high molecular weight polyethylene is about 0.2mm, the thickness of the high polymer lining is continuously reduced in the long-term friction process, the strength of the lining is further influenced, the artificial joint system generates the contradiction between the large movement range and the mechanical strength of the joint, the thickness of the lining is required to be thickened in order to solve the contradiction, the diameter of the ball head matched with the lining is inevitably reduced, the movement range of the joint system is reduced, the joint dislocation is further caused, and the failure is caused; 3. the friction pair composed of the ceramic ball head and the ceramic lining is provided with the pair, experiments prove that the abrasion is minimum, and meanwhile, the ceramic has inertia and good biocompatibility, so that the ceramic-to-ceramic artificial hip joint system becomes the first choice for clinical use at present. However, because of the inherent brittleness of the ceramic material, if the thickness is thin, the ceramic lining is easy to fracture, in order to overcome the defect, the thickness of the ceramic lining is required to be thicker, usually about 8-10 mm, but the problem that the size of the ceramic ball head matched with the ceramic lining is required to be reduced is caused, so that the movement range of the artificial hip joint is limited, and joint dislocation occurs, so that the artificial joint is invalid.
Research has shown that asians have a significantly greater range of motion than western species, particularly squatting and kneeling, and therefore asians have a greater bulb diameter, i.e., a thinner acetabular liner.
Therefore, the novel ceramic-to-ceramic artificial hip joint system with the large-size ball head and the ultrathin acetabular cup wall is constructed, the movement range of the artificial hip joint is increased, the cracking and abrasion loss of lining ceramic is reduced, the service life of the artificial hip joint is prolonged, the necessary requirement for improving the life quality of a patient is met, and one of the problems to be solved at present is urgent.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problem to be solved by the invention is to provide the hip joint prosthesis so as to achieve the purposes of reducing the abrasion between the back and the ball head, reducing the ceramic cracking risk, reducing the release of metal ions, increasing the movement range of the artificial hip joint and prolonging the service life of the hip joint prosthesis.
In order to solve the technical problems, the invention adopts the following technical scheme:
The hip joint prosthesis comprises a ball head and a spherical crown-shaped backing, wherein a ceramic plate used for reducing abrasion between the backing and the ball head is arranged on the inner side of the backing, the bottom ends of the ceramic plates are connected with the inner side of the backing in a welding mode, the ceramic plates are a group of ceramic plates which are distributed, and the outer concave curved surface of the ceramic plates is in contact with the outer surface of the ball head to form a friction pair;
or the ball bearing comprises a ball bearing, and is characterized by further comprising a ceramic plate and a supporting body, wherein the ceramic plate is a group of ceramic plates, the group of ceramic plates are distributed on the supporting body, a groove is formed in the inner side of the backing, the groove is used for accommodating the supporting body, and the outer concave curved surface of the ceramic plate is contacted with the outer surface of the ball head to form a friction pair.
Preferably, the concave curved surfaces of the ceramic plates are in the same curved surface.
Preferably, the support is a high molecular polymer, and the outer surface of the high molecular polymer is lower than the concave curved surface of the ceramic plate.
Preferably, the shape of the set of ceramic sheets may be cylindrical and/or polygonal.
Preferably, the outer surface of the ball head is provided with a group of pits for storing body fluid of a human body.
Preferably, the outer surface of the backing is provided with a set of holes suitable for human tissue growth, facilitating biological attachment, enhancing clinical long-term attachment.
Preferably, the ball head and the backing can be titanium and alloy thereof or tantalum and alloy thereof or medical stainless steel or cobalt-chromium alloy, and the ceramic chip is biological ceramic.
Preferably, grooves or protrusions are formed on the outer peripheral surface of the portion, where the ceramic sheet is connected to the high-molecular polymer.
Preferably, the set of ceramic sheets are non-uniformly spaced apart.
Preferably, the grooves on the ceramic sheet are spiral grooves.
Compared with the prior art, the invention has the following advantages:
According to the artificial hip joint, the inner side of the spherical-crown-shaped lining is provided with the plurality of ceramic plates in a dispersed manner to replace the integral ceramic lining with large thickness, so that the integral wall thickness of the artificial acetabulum is reduced, the diameter of the ball head is increased, and the movement range of the artificial hip joint is enlarged; the distance between the ceramic plates is reduced by laser welding, and the contact area between the ceramic plates and the ball head is increased, so that the pressure born by a single ceramic column body is reduced, and the problem of cracking of integral ceramic lining is solved; the quality of the hip joint is reduced, so that the movement of a patient is lighter; the surface of the ball head is provided with a miniature pit for storing lubricating fluid, and meanwhile, gaps are arranged between the ceramic plates, and can accommodate the lubricating fluid, so that the abrasion loss of the ball head and the ceramic plates is reduced; the high molecular polymer is arranged between the ceramic plates, and has certain impact resistance and noise reduction effects.
Drawings
The contents and the marks in the drawings expressed in the drawings of the present specification are briefly described as follows:
Fig. 1 is a schematic view of a construction of a hip joint prosthesis according to the invention.
Fig. 2 is a schematic view of another construction of the hip prosthesis of the present invention.
FIG. 3 is a schematic view of a ceramic wafer according to the present invention.
FIG. 4 is a schematic view of another embodiment of a ceramic wafer according to the present invention.
In the figure: 1. backing, 2, ceramic plate, 3, bulb, 4, high molecular polymer.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings, which illustrate in further detail.
The hip joint prosthesis comprises a ball head and an acetabular liner, wherein the outer surface of the ball head corresponds to the inner side of the acetabular liner, the acetabular liner is a metal spherical crown-shaped liner, the ball head can be a metal or ceramic ball head, ceramic plates for reducing friction between the ball head and the acetabular liner are arranged on the inner side of the liner or the outer surface of the ball head, the ceramic plates are in a group, and the ceramic plates are distributed in a group; specifically, a set of ceramic plates are unevenly spaced, which can increase the contact area and thereby reduce the contact stress.
Wherein, a group of holes which are suitable for the growth of human tissues, are convenient for biological connection and enhance the clinical long-term connection effect are arranged on the outer surface of the backing, and the group of holes are a group of micropores; the micropores can enable bone tissues to grow into the micropores, strengthen the connection between joints and host bones of a human body, improve the fixing reliability of the prosthesis in the human body and ensure the use effect.
As shown in fig. 1 to 4, the present invention will be described in detail by the following specific examples, which are as follows:
Example 1: the inner side of the lining 1 is provided with a ceramic plate 2 for reducing abrasion of the lining 1 and the ball head 3, the bottom end of the ceramic plate 2 is welded with the inner side of the lining, the ceramic plates 2 are a group of ceramic plates which are distributed, and the outer concave curved surface of the ceramic plate 2 is contacted with the outer surface of the ball head 3 to form a friction pair. Wherein the backing and the ball head can be titanium and alloy thereof, tantalum and alloy thereof, medical stainless steel or cobalt-chromium alloy, and the ceramic plate is biological ceramic.
The shape of the group of ceramic plates 2 can be a cylinder or a polygon prism, or the shape of the group of ceramic plates is a combination of the cylinder and the polygon prism, and the group of ceramic plates are arranged at non-uniform intervals, so that the contact area with the surface of the ball head is increased. In addition, the outer concave curved surfaces of a group of ceramic plates are positioned on the same curved surface, so that the stress is uniform, and the ceramic plates are stable and reliable.
The bottom of the ceramic plate 2 is welded on the inner side of the backing 1 by laser, and the outer concave curved surfaces of a group of ceramic plates are positioned on the same spherical surface. That is, a plurality of ceramic plates are distributed on the inner side of the spherical-crown-shaped lining to replace the integral ceramic lining with large thickness, so that the integral wall thickness of the artificial acetabulum is reduced, the diameter of the ball head is increased, and the movement range of the artificial hip joint is enlarged.
An intermediate is arranged between the ceramic plates, and the intermediate is a high molecular polymer, preferably ultrahigh molecular weight polyethylene. The outer surface of the high polymer is lower than the outer concave curved surface of the ceramic plate, and has certain impact resistance and noise reduction effect.
Grooves or protrusions are arranged on the peripheral surface of the connecting part of the ceramic plate and the high polymer, and preferably, the grooves on the ceramic plate are spiral grooves. The high polymer is embedded in the groove, so that the extraction force and the binding force of the ceramic plate are increased, and the ceramic plate is reliably fixed. Or the outer peripheral surface of the connecting part of the ceramic sheet and the high polymer is provided with the convex spiral ribs, so that the same fixing effect can be achieved.
The ball head has one set of pits for storing body fluid, and the pits are miniature pits for storing body fluid, lubricating the contact surface between the femoral condyle prosthesis and the ceramic plate and reducing friction. And a certain gap is arranged between the adjacent ceramic plates, and the gap can be used for storing body fluid of a human body, so that the contact surface of the ceramic plates and the ball head is lubricated, and friction between the ceramic plates and the ball head is reduced.
Example 2: the inner side of the lining 1 is provided with a group of ceramic plates 2 for reducing the surface abrasion of the lining 1 and the ball head 3, specifically, the inner side of the lining 1 is provided with a groove, a supporting body is arranged in the groove, the supporting body is a high polymer 4, the group of ceramic plates 2 are embedded on the high polymer 4, and the outer concave curved surface of the ceramic plates is contacted with the outer surface of the ball head to form a friction pair. Wherein the backing and the ball head can be titanium and alloy thereof, tantalum and alloy thereof, medical stainless steel or cobalt-chromium alloy, and the ceramic plate is biological ceramic.
The ceramic plate 2 is fixed on the inner side of the back through the high molecular polymer, the ceramic plate is fixed reliably and stably, the processing precision of the ceramic plate and the inner side of the back is reduced, the processing technology is reduced, the cost is reduced, and the ceramic plate has certain impact resistance and noise reduction effects.
The shape of the group of ceramic plates 2 can be a cylinder or a polygon prism, or the shape of the group of ceramic plates is a combination of the cylinder and the polygon prism, the group of ceramic plates are arranged at non-uniform intervals, the outer end surfaces of the group of ceramic plates are positioned on the same spherical surface, and the contact area between the outer end surfaces of the group of ceramic plates and the surface of the ball head is increased. In addition, the outer concave curved surfaces of a group of ceramic plates are positioned on the same curved surface, so that the stress is uniform, and the ceramic plates are stable and reliable. The ceramic plates distributed on the inner side of the spherical-crown-shaped back substitute for the integral ceramic lining with large thickness, so that the integral wall thickness of the artificial acetabulum is reduced, the diameter of the ball head is increased, and the movement range of the artificial hip joint is enlarged.
The support body and the ceramic are manufactured integrally, and then the support body and the ceramic which are integrally connected after the integral manufacture are assembled in the groove of the backing.
The surface of the ball head 3 is provided with a group of pits for storing human body fluid, and the group of pits are a group of miniature pits for storing human body fluid, lubricating the contact surface of the femoral condyle prosthesis and the ceramic plate and reducing friction between the femoral condyle prosthesis and the ceramic plate. And the surface of the high polymer is lower than the outer concave curved surface of the ceramic plate, a certain gap is reserved between the adjacent ceramic plates, the gap can be used for storing body fluid of a human body, the contact surface of the ceramic plate and the ball head is lubricated, friction between the ceramic plate and the ball head is reduced, and the ceramic plate and the ball head are small in abrasion and long in service life.
Grooves or protrusions are arranged on the outer peripheral surface of the connecting part of the ceramic plate 2 and the high polymer 4, and the grooves on the ceramic plate are spiral grooves; the high polymer is embedded in the groove, so that the extraction force and the binding force of the ceramic plate are increased, and the ceramic plate is reliably fixed. Or the outer peripheral surface of the connecting part of the ceramic sheet and the high polymer is provided with the convex spiral ribs, so that the same fixing effect can be achieved.
A group of ceramic plates 2 are fixed on the inner side of the backing through high molecular polymers, and a buffer is arranged between the bottom of each ceramic plate and the backing, so that the ceramic plates are prevented from being in hard contact with the backing, acting force of the ball heads on the ceramic plates can be buffered, and the ceramic plates are not easy to crack.
The structure of the hip joint prosthesis can also be that the surface of the ball head is provided with a groove, a supporting body is arranged in the groove, the supporting body is a high polymer, a group of ceramic plates are embedded on the surface of the high polymer, and the convex curved surface of the ceramic plates is contacted with the inner side surface of the lining to form a friction pair. The peripheral surface of the part where the ceramic plate is connected with the high polymer is provided with a spiral groove, and the high polymer is embedded in the spiral groove, so that the extraction force and the binding force of the ceramic plate are increased; the inner side of the backing is in contact with the outer end surfaces of a set of ceramic plates.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied to other applications without any modification, as long as the inventive concept and technical scheme are adopted.
Claims (2)
1. A hip joint prosthesis comprising a bulb and a spherical crown shaped backing, characterized in that: the inner side of the lining is provided with a ceramic plate for reducing abrasion between the lining and the ball head, the bottom end of the ceramic plate is connected with the inner side of the lining in a welding mode, the ceramic plates are a group of ceramic plates which are distributed, and the concave curved surface of the ceramic plates is contacted with the outer surface of the ball head to form a friction pair;
An intermediate is arranged between the ceramic plates, and the intermediate is a high-molecular polymer, the outer surface of which is lower than the outer concave curved surface of the ceramic plates, so that the ceramic plates have certain impact resistance and noise reduction effects;
The outer surface of the ball head is provided with a group of pits for storing body fluid of a human body; the ball head and the backing are titanium or titanium alloy or tantalum alloy or medical stainless steel or cobalt-chromium alloy, and the ceramic sheet is biological ceramic;
grooves or protrusions are formed in the outer peripheral surface of the part, connected with the high-molecular polymer, of the ceramic piece;
The outer side surface of the back lining is provided with a group of holes, the group of holes are a group of micropores, and the micropores can enable bone tissues to grow into the holes, so that the connection between the hip joint prosthesis and the host bone of a human body is enhanced;
the grooves on the ceramic plates are spiral grooves, and the high-molecular polymer is embedded in the grooves, so that the extraction force and the binding force of the ceramic plates are increased;
The group of ceramic plates are unevenly distributed at intervals; the outer concave curved surfaces of a group of ceramic plates are positioned on the same curved surface, and the stress is uniform.
2. The hip prosthesis of claim 1, wherein: the group of ceramic plates are cylindrical and/or polygonal in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154440.5A CN109662808B (en) | 2019-03-01 | 2019-03-01 | Hip joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154440.5A CN109662808B (en) | 2019-03-01 | 2019-03-01 | Hip joint prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109662808A CN109662808A (en) | 2019-04-23 |
| CN109662808B true CN109662808B (en) | 2024-05-14 |
Family
ID=66151814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910154440.5A Active CN109662808B (en) | 2019-03-01 | 2019-03-01 | Hip joint prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109662808B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368142A (en) * | 2019-08-05 | 2019-10-25 | 北京爱康宜诚医疗器材有限公司 | Femoral head prosthesis, femoral prosthesis component and hip joint component |
| CN110368140B (en) * | 2019-08-05 | 2024-04-30 | 吉瑞骨科有限公司 | Femoral implant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549700A (en) * | 1993-09-07 | 1996-08-27 | Ortho Development Corporation | Segmented prosthetic articulation |
| EP1433443A1 (en) * | 2002-12-27 | 2004-06-30 | Biomet Merck Limited | Hip prosthesis with ceramic bearing |
| CN102488573A (en) * | 2011-11-11 | 2012-06-13 | 上海交通大学 | Artificial acetabulum made of discrete ceramic cylinders |
| CN103222904A (en) * | 2013-04-27 | 2013-07-31 | 上海交通大学 | Distributed acetabular prosthesis |
| WO2016183701A1 (en) * | 2015-05-15 | 2016-11-24 | 江苏奥康尼医疗科技发展有限公司 | Artificial prosthesis made of organic polymeric material for hip hemiarthroplasty |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7695521B2 (en) * | 2001-05-01 | 2010-04-13 | Amedica Corporation | Hip prosthesis with monoblock ceramic acetabular cup |
-
2019
- 2019-03-01 CN CN201910154440.5A patent/CN109662808B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549700A (en) * | 1993-09-07 | 1996-08-27 | Ortho Development Corporation | Segmented prosthetic articulation |
| EP1433443A1 (en) * | 2002-12-27 | 2004-06-30 | Biomet Merck Limited | Hip prosthesis with ceramic bearing |
| CN102488573A (en) * | 2011-11-11 | 2012-06-13 | 上海交通大学 | Artificial acetabulum made of discrete ceramic cylinders |
| CN103222904A (en) * | 2013-04-27 | 2013-07-31 | 上海交通大学 | Distributed acetabular prosthesis |
| WO2016183701A1 (en) * | 2015-05-15 | 2016-11-24 | 江苏奥康尼医疗科技发展有限公司 | Artificial prosthesis made of organic polymeric material for hip hemiarthroplasty |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109662808A (en) | 2019-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20250090332A1 (en) | Partial hip prosthesis | |
| Oka et al. | Development of an artificial articular cartilage | |
| AU667001B2 (en) | Plastic knee femoral implants | |
| US6217616B1 (en) | Elbow prosthesis | |
| CN103222904B (en) | Distributed acetabular component | |
| CN209808652U (en) | Ankle prosthesis | |
| EP3257475B1 (en) | Total hip surface replacement implant | |
| EP2538888A2 (en) | Prosthetic joint | |
| CN109662808B (en) | Hip joint prosthesis | |
| CN109662812B (en) | Knee joint prosthesis | |
| CN109662815B (en) | Ankle joint prosthesis | |
| Kurtz | Retrieval analysis of a polycarbonate-urethane acetabular cup: a case report | |
| CN109793598B (en) | Shoulder joint prosthesis | |
| CN109662816B (en) | Artificial ankle joint | |
| CN209808651U (en) | Artificial shoulder joint | |
| CN209808653U (en) | Artificial ankle joint | |
| CN109662814B (en) | Artificial shoulder joint | |
| CN209808647U (en) | Artificial knee joint | |
| CN109793597B (en) | Bracket type ceramic artificial elbow joint | |
| CN109662811B (en) | Artificial knee joint prosthesis | |
| CN209808648U (en) | stent type ceramic artificial elbow joint | |
| CN109662810A (en) | A kind of artificial knee joint | |
| CN110368144B (en) | Shoulder joint prosthesis | |
| CN209808649U (en) | Artificial knee joint prosthesis | |
| CN109662813B (en) | Welding type ceramic artificial elbow joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |