CN109259900B - Acetabular prosthesis, hip joint prosthesis and method for implanting an acetabular prosthesis - Google Patents
Acetabular prosthesis, hip joint prosthesis and method for implanting an acetabular prosthesis Download PDFInfo
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- CN109259900B CN109259900B CN201811037640.4A CN201811037640A CN109259900B CN 109259900 B CN109259900 B CN 109259900B CN 201811037640 A CN201811037640 A CN 201811037640A CN 109259900 B CN109259900 B CN 109259900B
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- acetabular
- nickel
- prosthesis
- titanium
- nickel titanium
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- 210000004394 hip joint Anatomy 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title abstract description 12
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 186
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims abstract description 178
- 239000011159 matrix material Substances 0.000 claims abstract description 30
- 210000000588 acetabulum Anatomy 0.000 claims abstract description 24
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 24
- 230000007704 transition Effects 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 68
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 19
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 10
- 238000002513 implantation Methods 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract description 2
- 210000002805 bone matrix Anatomy 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 239000011800 void material Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000007750 plasma spraying Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000007012 clinical effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 239000000602 vitallium Substances 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
- A61F2/46—Special tools for implanting artificial joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention provides an acetabular prosthesis, a hip joint prosthesis and an implantation method of the acetabular prosthesis, and relates to the technical field of artificial joints. The acetabulum prosthesis comprises an acetabulum matrix and a nickel-titanium wire support part; the acetabulum matrix is hemispherical; the outer surface of the acetabulum matrix is connected with one end of the nickel-titanium wire supporting part, and the other end of the nickel-titanium wire supporting part is attached to the outer surface of the acetabulum matrix; the phase transition temperature of the nickel titanium wire supporting part is between 37 ℃ and 50 ℃. Solves the problem that the prior hip joint prosthesis is unstable in initial fixation and long-term fixation. The nickel-titanium wire supporting part has biological safety; the outer surface of the acetabular prosthesis is implanted into an acetabular fossa of a human body, and the nickel-titanium wire supporting part can be inserted into a bone gap of the acetabular fossa of the human body at a certain temperature, so that the effects of initial fixation and long-term fixation are achieved.
Description
Technical Field
The invention relates to the technical field of artificial joints, in particular to an acetabular prosthesis, a hip joint prosthesis and an implantation method of the acetabular prosthesis.
Background
The fixing effect of biological type fixed acetabular prostheses in artificial hip joint prostheses is always the focus of attention of academia and engineering, and the fixing effect can be divided into two stages, namely initial fixing and long-term fixing. For initial fixation, the mainstream treatment method is to design a plurality of holes on an acetabular cup, and the holes are realized by a self-tapping screw mode. For long-term fixation, the primary goal of the biosolids format is to hope bone tissue can grow into the acetabular cup and the mainstream treatment is to spray the outer surface of the acetabular cup, such as titanium coating, tantalum coating, hydroxyapatite coating, or trabecular bone structure, etc. The method can obtain better clinical effects for various treatment modes of the main stream in the market at present.
However, the above technical solution also has certain problems, such as: the initial fixation of the acetabular cup is realized by adopting the mode of the screw, the position of the acetabular cup can move along with the time, the screw can prevent the acetabular cup from moving, so that a gap exists between an acetabular fossa and the acetabular cup, and therefore, bone tissues can not grow into the surface of the acetabular cup finally, and the effect of long-term fixation cannot be realized.
On the contrary, if the initial fixation is not performed by using a screw, when the acetabular cup is implanted into the acetabular fossa, the acetabular cup is displaced due to the external pushing force of the acetabular fossa under the existence of only surface pressure, and a gap is generated between the acetabular fossa and the acetabular cup, so that the effect of long-term fixation cannot be realized.
Disclosure of Invention
The invention aims to provide an acetabular prosthesis and aims to solve the technical problems of unstable initial fixation and unstable long-term fixation of a biological fixed acetabular prosthesis in the prior art.
The invention also provides a hip joint prosthesis to solve the technical problems of unstable initial fixation and unstable long-term fixation of the biological fixed acetabular prosthesis in the prior art.
The invention also provides an implantation method of the acetabular prosthesis, which aims to solve the technical problems of unstable initial fixation, unstable long-term fixation and laborious fixation process of the acetabular prosthesis fixed biologically in the prior art.
The invention provides an acetabular prosthesis, which comprises an acetabular matrix and a nickel-titanium wire supporting part;
the acetabulum matrix is hemispherical, the outer surface of the acetabulum matrix is connected with one end of the nickel-titanium wire supporting part, and the other end of the nickel-titanium wire supporting part is attached to the outer surface of the acetabulum matrix;
the phase transition temperature of the nickel titanium wire supporting part is between 37 ℃ and 50 ℃;
after the acetabular prosthesis is implanted into the acetabular fossa of a human body, the other end of the nickel-titanium wire supporting portion can stand at a certain temperature, so that the other end of the nickel-titanium wire supporting portion is inserted into a bone void of the acetabular fossa of the human body.
Further, the nickel-titanium wire supporting part comprises a first nickel-titanium wire;
one end of the first nickel-titanium wire is connected to the outer surface of the acetabular substrate, and the other end of the first nickel-titanium wire is a free end;
the number of the first nickel-titanium wires is multiple, and the multiple first nickel-titanium wires are uniformly distributed and connected to the outer surface of the acetabular matrix.
Further, the other ends of the plurality of first nickel titanium wires are bonded and distributed in the weft direction of the outer surface of the acetabular substrate;
or the other ends of the plurality of first nickel titanium wires are laminated and distributed in the warp direction of the outer surface of the acetabular matrix;
or the other ends of the plurality of first nickel titanium wires are distributed in a staggered and laminated mode in the warp and weft directions of the outer surface of the acetabular matrix.
Further, the diameter of the first nickel titanium wire is in a value range of 0.2 mm-1 mm;
the length of the first nickel-titanium wire ranges from 0.5mm to 1.5 mm.
Further, the connection mode between one end of the first nickel titanium wire and the outer surface of the acetabular substrate is any one of welding, press riveting and interference fit.
Further, the nickel-titanium wire supporting part further comprises a second nickel-titanium wire;
the other ends of the first nickel-titanium wires are sequentially connected to the second nickel-titanium wires, and the second nickel-titanium wires can be attached to the outer surface of the acetabular matrix.
Further, the nickel-titanium wire supporting part comprises a nickel-titanium net;
one end of the nickel-titanium mesh is connected to the outer surface of the acetabular substrate, and the other end of the nickel-titanium mesh can be attached to the outer surface of the acetabular substrate.
The invention also provides a hip joint prosthesis, which comprises a femoral stem prosthesis, a femoral head prosthesis and the acetabulum prosthesis;
the femoral stem prosthesis is matched with the femoral head prosthesis through taper,
the femoral head prosthesis is connected in the accommodating cavity on the inner side surface of the acetabular base body through the acetabular lining or connected in the accommodating cavity on the inner side surface of the acetabular base body,
one end of the nickel titanium wire supporting part is connected with the outer surface of the acetabular substrate, and the other end of the nickel titanium wire supporting part is inserted into a bone gap of an acetabular fossa of a human body.
The invention also provides an implantation method of the acetabular prosthesis, comprising the following steps of;
fixed acetabular matrix
Implanting the acetabular substrate;
fixed nickel titanium wire supporting part
And heating the nickel-titanium wire supporting part by using heating equipment, wherein after heating, the other end of the nickel-titanium wire supporting part is in an upright state, and the other end of the nickel-titanium wire supporting part is inserted into a bone gap of an acetabular fossa of a human body.
According to the acetabular prosthesis provided by the invention, the acetabular substrate is hemispherical, so that the acetabular substrate and the acetabular fossa of a human body have the same structure and are convenient to be matched and connected; the inner side surface of the acetabulum matrix is provided with a containing cavity, and the containing cavity is used for directly containing the femoral head prosthesis or containing the femoral head prosthesis through an acetabulum lining; the outer surface of the acetabulum matrix is connected with one end of the nickel titanium wire supporting part, the position of the nickel titanium wire supporting part is fixed by utilizing the acetabulum matrix, the other end of the nickel titanium wire supporting part is attached to the outer surface of the acetabulum matrix, so that the nickel titanium wire supporting part can be attached and fixed with the acetabular fossa of a human body, and the nickel titanium wire supporting part has the characteristics of shape memory, super elasticity, temperature change sensitivity, corrosion resistance, toxicity resistance, soft correction force and good shock absorption performance, and effectively solves the problems of unstable initial fixation and long-term fixation in the prior art; the phase transition temperature of the nickel titanium wire supporting part is 37-50 ℃ and higher than the temperature of a human body, so that the nickel titanium wire supporting part can be in an upright state at a certain temperature after the acetabular substrate is implanted into a femoral head of the human body in a surgical process, the other end of the nickel titanium wire supporting part is directly inserted into a bone gap of an acetabular fossa of the human body to be fixed, the acetabular substrate is fixed in the mode, the initial fixation and the long-term fixation are very firm, and no loosening phenomenon of an acetabular prosthesis can be generated. The invention designs an innovative acetabular prosthesis by utilizing the memory property of nickel-titanium alloy, so that the acetabular prosthesis can still achieve very good initial fixation and long-term fixation effects under the condition that screws are not used and an excessively thick coating is not used.
The invention also provides a hip joint prosthesis, the hip joint prosthesis is connected to the femur ball head, and the acetabular substrate is supported and fixed by utilizing the nickel titanium wire supporting part, so that the fixing mode is simple, stable and firm.
The invention also provides an implantation method of the acetabular prosthesis, which sequentially adopts a mode of fixing an acetabular substrate and a nickel titanium wire supporting part, firstly implants the acetabular substrate outside a femoral head of a human body, and then heats the nickel titanium wire supporting part to enable the other end of the nickel titanium wire supporting part to be instantly erected so as to fix the acetabular substrate, and the fixing mode is simple and stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the outer surface of a first acetabular prosthesis according to an embodiment of the invention;
FIG. 2 is a front view of a first acetabular prosthesis according to an embodiment of the invention;
FIG. 3 is a schematic view of the inner side of a first acetabular prosthesis according to an embodiment of the invention;
fig. 4 is a schematic structural view of a first nickel-titanium wire attached to an outer surface of an acetabular substrate according to an embodiment of the invention;
FIG. 5 is a schematic structural view of a first nickel titanium wire provided by an embodiment of the present invention upstanding from an outer surface of an acetabular substrate;
FIG. 6 is a schematic view of the outer surface of a second acetabular prosthesis according to an embodiment of the invention;
FIG. 7 is a front view of a second acetabular prosthesis according to an embodiment of the invention;
FIG. 8 is a schematic view of the medial side of a second acetabular prosthesis according to an embodiment of the invention;
FIG. 9 is a schematic view of a nickel titanium mesh according to an embodiment of the present invention attached to an outer surface of an acetabular component;
FIG. 10 is a schematic view of a nickel titanium mesh provided in an embodiment of the present invention upstanding from an outer surface of an acetabular substrate;
FIG. 11 is a schematic view of the structure of the outer surface of a third acetabular prosthesis according to an embodiment of the invention;
fig. 12 is a schematic view of the structure of the outer surface of a fourth acetabular prosthesis according to an embodiment of the invention.
Icon: 100-acetabular matrix; 200-nickel titanium wire supporting parts; 101-a receiving chamber; 201-a first nickel titanium wire; 202-a second nickel titanium wire.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
FIG. 1 is a schematic view of the outer surface of a first acetabular prosthesis according to an embodiment of the invention; FIG. 2 is a front view of a first acetabular prosthesis according to an embodiment of the invention; FIG. 3 is a schematic view of the inner side of a first acetabular prosthesis according to an embodiment of the invention; fig. 4 is a schematic structural view of a first nickel-titanium wire attached to an outer surface of an acetabular substrate according to an embodiment of the invention; fig. 5 is a schematic structural view of a first nickel-titanium wire according to an embodiment of the present invention upstanding from an outer surface of an acetabular substrate.
As shown in fig. 1 to 5, the present invention provides an acetabular prosthesis comprising an acetabular base 100 and a nickel titanium wire support 200;
the acetabulum substrate 100 is hemispherical, the outer surface of the acetabulum substrate 100 is connected with one end of the nickel titanium wire supporting part 200, and the other end of the nickel titanium wire supporting part 200 is attached to the outer surface of the acetabulum substrate 100;
the phase transition temperature of the nickel titanium wire supporting part 200 is between 37 ℃ and 50 ℃;
after the acetabular prosthesis is implanted into the acetabular fossa of the human body, the other end of the nitinol wire supporting portion 200 can stand upright at a certain temperature to insert the other end of the nitinol wire supporting portion 200 into the bone void of the acetabular fossa of the human body.
In fig. 1, the acetabular substrate 100 is hemispherical to conform the acetabular prosthesis to the shape of the acetabular fossa of the human body.
The inner side of the acetabular shell 100 is provided with a receiving cavity 101, the receiving cavity 101 being semi-spherical so that a femoral head prosthesis or an acetabular liner prosthesis can be received in the receiving cavity 101.
The lower end of the nickel titanium wire supporting part 200 is connected to the outer surface of the acetabular bone matrix 100, the upper end of the nickel titanium wire supporting part 200 can be attached to the outer surface of the acetabular bone matrix 100, the nickel titanium wire supporting part 200 is connected to the outer surface of the acetabular bone matrix 100, and the acetabular bone matrix 100 is connected into the acetabular fossa of a human body by the nickel titanium wire supporting part 200.
The nickel-titanium wire supporting part 200 is made of nickel-titanium alloy, and the nickel-titanium alloy has the advantages of shape memory property, super elasticity, temperature change sensitivity, corrosion resistance, toxicity resistance, soft correction force and good damping performance, and effectively solves the problems of unstable initial fixation and long-term fixation in the prior art.
In one embodiment of the present invention, the transformation temperature of the nitinol wire supporting portion 200 ranges from 37 ℃ to 50 ℃ and is higher than the temperature of a human body, the nitinol wire supporting portion 200 is in a martensitic state at normal temperature, the nitinol wire supporting portion 200 is attached to the outer surface of the acetabular substrate 100 to form any shape, no matter what shape the nitinol wire supporting portion 200 forms on the outer surface of the acetabular substrate 100, when the nitinol wire supporting portion 200 returns to an upright state at the transformation temperature, the nitinol wire supporting portion 200 can be inserted into a bone void of an acetabular fossa of the human body to achieve a very good anchoring effect, thereby achieving a good initial fixing effect.
Further, the nitinol wire support 200 includes a first nitinol wire 201;
one end of the first nickel titanium wire 201 is connected to the outer surface of the acetabular substrate 100, and the other end of the first nickel titanium wire 201 is a free end;
the number of the first nickel titanium wires 201 is plural, and the plurality of the first nickel titanium wires 201 are uniformly distributed and connected to the outer surface of the acetabular substrate 100.
In fig. 4, in a normal temperature state, the lower end of the first nickel titanium wire 201 is fixedly connected to the outer surface of the acetabular base 100, the upper end of the first nickel titanium wire 201 is attached to the outer surface of the acetabular base 100, and when the first nickel titanium wire 201 returns to an upright state at a phase transition temperature, as shown in fig. 5, the upper end of the first nickel titanium wire 201 can be inserted into a bone void of a human acetabular fossa to fix the position of the acetabular base 100.
The outer surface of the acetabular bone matrix 100 is uniformly distributed and connected with a plurality of first nickel titanium wires 201, the plurality of first nickel titanium wires 201 are honeycomb-shaped on the outer surface of the acetabular bone matrix 100, and the outer surface of the acetabular bone matrix 100 is stressed uniformly by the plurality of first nickel titanium wires 201, so that the fixing position of the acetabular bone matrix 100 is firm.
Grooves are formed in the upper end of the first nickel titanium wire 201 to increase friction between the upper end of the first nickel titanium wire 201 and the bone void of the acetabular fossa of the human body.
FIG. 6 is a schematic view of the outer surface of a second acetabular prosthesis according to an embodiment of the invention; FIG. 7 is a front view of a second acetabular prosthesis according to an embodiment of the invention; FIG. 8 is a schematic view of the medial side of a second acetabular prosthesis according to an embodiment of the invention; FIG. 9 is a schematic view of a nickel titanium mesh according to an embodiment of the present invention attached to an outer surface of an acetabular component; fig. 10 is a schematic structural view of a nickel-titanium mesh according to an embodiment of the present invention upstanding from an outer surface of an acetabular substrate.
As shown in fig. 6 to 10, the other ends of the plurality of first nickel titanium wires 201 are laminated and distributed in the weft direction of the outer surface of the acetabular substrate 100;
alternatively, the other ends of the plurality of first nickel titanium wires 201 are bonded and distributed in the meridian direction of the outer surface of the acetabular substrate 100;
alternatively, the other ends of the plurality of first nickel titanium wires 201 are staggered and bonded in the warp and weft directions of the outer surface of the acetabular substrate 100.
FIG. 11 is a schematic view of the structure of the outer surface of a third acetabular prosthesis according to an embodiment of the invention;
as shown in fig. 11, in one embodiment of the present invention, in a normal temperature state, the lower ends of the plurality of first nickel titanium wires 201 are uniformly and fixedly connected to the outer surface of the acetabular substrate 100, the upper ends of the plurality of first nickel titanium wires 201 are bonded and distributed along the weft direction of the outer surface of the acetabular substrate 100, and when the first nickel titanium wires 201 return to an upright state at a phase transition temperature, the upper ends of the first nickel titanium wires 201 can be inserted into bone gaps of the acetabular fossa of a human body to fix the position of the acetabular substrate 100.
Fig. 12 is a schematic view of the structure of the outer surface of a fourth acetabular prosthesis according to an embodiment of the invention.
As shown in fig. 12, in one embodiment of the present invention, in a normal temperature state, the lower ends of the plurality of first nickel titanium wires 201 are uniformly and fixedly connected to the outer surface of the acetabular substrate 100, the upper ends of the plurality of first nickel titanium wires 201 are bonded and distributed along the meridian direction of the outer surface of the acetabular substrate 100, and when the first nickel titanium wires 201 return to an upright state at a phase transition temperature, the upper ends of the first nickel titanium wires 201 can be inserted into bone gaps of the acetabular fossa of a human body to fix the position of the acetabular substrate 100.
As shown in fig. 6, in one embodiment of the present invention, in a normal temperature state, the lower ends of the plurality of first nickel titanium wires 201 are uniformly distributed and fixedly connected on the outer surface of the acetabular substrate 100, the upper ends of the plurality of first nickel titanium wires 201 are uniformly distributed along the warp and weft directions of the outer surface of the acetabular substrate 100, and when the first nickel titanium wires 201 return to an upright state at a phase transition temperature, the upper ends of the first nickel titanium wires 201 can be inserted into bone gaps of an acetabular fossa of a human body to fix the position of the acetabular substrate 100.
Further, the diameter of the first nickel titanium wire 201 ranges from 0.2mm to 1 mm;
the length of the first nickel titanium wire 201 ranges from 0.5mm to 1.5 mm.
In one embodiment of the present invention, the diameter of the first nickel titanium wire 201 is 0.5mm, the diameter of the first nickel titanium wire 201 is not too thick, and the first nickel titanium wire 201 is difficult to bend and form at normal temperature, and is difficult to recover when being too thin and cannot be inserted into a bone gap.
The length of the first nickel titanium wire 201 is 1.0mm, the length of the first nickel titanium wire 201 is not too long, the first nickel titanium wire is inconvenient to be completely unfolded due to limited release space, the first nickel titanium wire is inconvenient to fix, and the fixing position is not firm after the first nickel titanium wire is unfolded too short, so that the fixing effect is poor.
Further, the connection manner between one end of the first nickel titanium wire 201 and the outer surface of the acetabular substrate 100 is any one of welding, press riveting and interference fit.
In one embodiment of the invention, the lower end of the first nickel titanium wire 201 is welded to the outer surface of the acetabular bone matrix 100 in a simple manner.
In another embodiment of the present invention, the lower end of the first nickel titanium wire 201 is connected to the outer surface of the acetabular substrate 100 by press riveting, and the connection is simple, convenient to operate and firm in connection position by press riveting.
In another embodiment of the present invention, the lower end of the first nickel titanium wire 201 is connected to the outer surface of the acetabular substrate 100 by adopting an interference fit, and the first nickel titanium wire 201 is installed and then has good long-term use fastness, so that the interference fit is used as a preferred connection.
Further, the nitinol wire support 200 further comprises a second nitinol wire 202;
the other ends of the first nickel titanium wires 201 are sequentially connected to the second nickel titanium wires 202, and the second nickel titanium wires 202 can be attached to the outer surface of the acetabular substrate 100.
In one embodiment of the present invention, as shown in fig. 9, in a normal temperature state, the upper ends of the first nickel titanium wires 201 are sequentially connected to the second nickel titanium wires 202, and the second nickel titanium wires 202 are attached to the outer surface of the acetabular base 100, so that after the first nickel titanium wires 201 and the second nickel titanium wires 202 are connected, a diamond structure is formed, and when the first nickel titanium wires 201 return to an upright state at a phase transition temperature, the upper ends of the first nickel titanium wires 201 are supported in bone gaps of the acetabular fossa of a human body through the second nickel titanium wires 202, so as to fix the position of the acetabular base 100.
The advantages of using the second nickel titanium wire 202 are: when all the first nickel titanium wires 201 are connected and the tensile forces after phase transformation are related, the force is averaged, and when the acetabular prosthesis is normally used, the nickel titanium wires are not easily damaged due to the common bearing of the load force.
Further, the nitinol wire supporting part 200 includes a nitinol mesh;
one end of the nickel titanium mesh is connected to the outer surface of the acetabular substrate 100, and the other end of the nickel titanium mesh can be attached to the outer surface of the acetabular substrate 100.
In this embodiment, the nitinol wire supporting portion 200 is a nickel-titanium thin plate, and a nickel-titanium mesh is formed on the nickel-titanium thin plate by laser cutting or carving, then the lower end of the nickel-titanium mesh is welded on the outer surface of the acetabular substrate 100, the upper end of the nickel-titanium mesh is attached to the acetabular substrate 100, and the nickel-titanium mesh is of an integral mesh structure, so that the fixing manner is firm and the use is more convenient.
At normal temperature, the nickel-titanium mesh is attached to the outer surface of the acetabular substrate 100, and when the nickel-titanium mesh returns to an upright state at the phase transition temperature, the upper end of the nickel-titanium mesh is supported in a bone void of the acetabular fossa of the human body so as to fix the position of the acetabular substrate 100.
Further, the acetabular substrate 100 is made of any one of cobalt-chromium-molybdenum alloy, titanium alloy and stainless steel.
Further, the outer surface of the acetabular substrate 100 may be treated by any one of sand blasting, titanium spraying, and plasma spraying.
The acetabular substrate 100 is made of titanium alloy material, and the surface of the acetabular substrate 100 is subjected to sand blasting to form a rough surface on the surface of the acetabular substrate 100, or the surface of the acetabular substrate 100 is subjected to titanium spraying, or the surface of the acetabular substrate 100 is subjected to plasma spraying, so that bone tissue can grow into the acetabular substrate 100 conveniently.
The invention also provides an implantation method of the acetabular prosthesis, comprising the following steps of;
fixed acetabular matrix
The phase transition temperature range of the nickel titanium wire supporting part 200 is 37-50 ℃ when the acetabular substrate 100 is implanted, and is higher than the body temperature of a normal person, so that the implantation of surgery is more convenient. Otherwise, if the temperature of the phase change is set near 37 ℃ of the body temperature like a heart stent, the acetabular prosthesis needs to be quickly driven in once contacting the human body during the operation, otherwise, the acetabular matrix 100 is difficult to implant after the nitinol wire support 200 is erected, or the acetabular matrix is difficult to adjust in position after implantation;
the nickel-titanium wire supporting part 200 adopts a plurality of first nickel-titanium wires 201, the lower ends of the first nickel-titanium wires 201 are connected to the outer surface of the acetabular matrix 100 in an interference fit mode, and then the acetabular matrix 100 is implanted;
fixed nickel titanium wire supporting part
Heating the nickel-titanium wire supporting part 200 by using a heating device, wherein after heating, the other end of the nickel-titanium wire supporting part 200 is in an upright state, and the other end of the nickel-titanium wire supporting part 200 is inserted into a bone gap of an acetabular fossa of a human body;
the nitinol wire supporting portion 200 adopts a plurality of first nitinol wires 201, and heats the first nitinol wires 201 by using medical equipment, which is: the heating temperature time is 5-10 seconds, namely the phase change of the first nickel titanium wire 201 can be triggered, one end above the first nickel titanium wire 201 is in an upright state, and one end above the first nickel titanium wire 201 can be instantly inserted into a bone gap of an acetabular fossa of a human body, so that fixation is realized.
The invention also provides a hip joint prosthesis, which comprises a femoral stem prosthesis, a femoral head prosthesis and the acetabulum prosthesis;
the femoral stem prosthesis is matched with the femoral head prosthesis through taper,
the femoral head prosthesis is connected in the accommodating cavity on the inner side surface of the acetabular base body through the acetabular lining or connected in the accommodating cavity on the inner side surface of the acetabular base body,
one end of the nitinol wire supporting part 200 is connected to the outer surface of the acetabular substrate 100, and the other end of the nitinol wire supporting part 200 is inserted into a bone void of an acetabular fossa of a human body.
When the screw type screw fixing device is used, at the temperature of a human body, the first nickel titanium wires 201 attached to the surface of the acetabular substrate 100 are recovered from a martensite phase to an austenite phase, so that the first nickel titanium wires 201 are changed from a creeping state to an upright state, the upright first nickel titanium wires 201 directly penetrate into cancellous bones of the acetabular fossa of the human body, and as all the first nickel titanium wires 201 penetrate completely, a huge anchoring effect is realized, and compared with the prior art, a screw fixing single-point fixing mode is adopted, and the screw type screw fixing device is firmer in fixing mode.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. An acetabular prosthesis characterized by comprising an acetabular base (100) and a nickel titanium wire support (200);
the acetabulum matrix (100) is hemispherical, and the phase transition temperature of the nickel titanium wire supporting part (200) is within 37-50 ℃;
the nickel-titanium wire supporting part (200) comprises a plurality of first nickel-titanium wires (201) and a plurality of second nickel-titanium wires (202), one ends of the first nickel-titanium wires (201) are connected to the outer surface of the acetabulum matrix (100), the other ends of the first nickel-titanium wires (201) are sequentially connected to the second nickel-titanium wires (202), and the second nickel-titanium wires (202) can be attached to the outer surface of the acetabulum matrix (100);
in a normal temperature state, the other ends of the first nickel titanium wires (201) are sequentially connected to the second nickel titanium wires (202), and the second nickel titanium wires (202) are attached to the outer surface of the acetabulum matrix (100), so that the first nickel titanium wires (201) and the second nickel titanium wires (202) are connected to form a diamond structure;
when the first nickel titanium wire (201) is restored to an upright state at the phase transition temperature, the other end of the first nickel titanium wire (201) is supported in a bone gap of an acetabular fossa of a human body through the second nickel titanium wire (202) so as to fix the position of the acetabular matrix (100).
2. The acetabular prosthesis according to claim 1, wherein the other ends of the plurality of first nickel titanium wires (201) are distributed in a fitted manner in a weft direction of an outer surface of the acetabular substrate (100);
or the other ends of the plurality of first nickel titanium wires (201) are laminated and distributed in the warp direction of the outer surface of the acetabulum matrix (100);
or, the other ends of the plurality of first nickel titanium wires (201) are staggered and laminated on the outer surface of the acetabulum matrix (100) along the warp and weft directions.
3. The acetabular prosthesis according to claim 2, characterized in that the diameter of the first nickel titanium wire (201) ranges between 0.2mm and 1 mm;
the length of the first nickel titanium wire (201) ranges from 0.5mm to 1.5 mm.
4. The acetabular prosthesis according to claim 2, characterized in that the connection between one end of the first nickel titanium wire (201) and the outer surface of the acetabular substrate (100) is any one of welding, press riveting, interference fitting.
5. The acetabular prosthesis according to claim 1, wherein the nitinol wire support (200) comprises a nitinol mesh;
one end of the nickel-titanium mesh is connected to the outer surface of the acetabular substrate (100), and the other end of the nickel-titanium mesh can be attached to the outer surface of the acetabular substrate (100).
6. A hip joint prosthesis comprising a femoral stem prosthesis, a femoral head prosthesis and an acetabular prosthesis according to any of claims 1 to 5;
the femoral stem prosthesis is matched with the femoral head prosthesis through taper,
the femoral head prosthesis is connected in the accommodating cavity (101) of the inner side surface of the acetabular substrate (100) through the acetabular liner, or the femoral head prosthesis is connected in the accommodating cavity (101) of the inner side surface of the acetabular substrate (100).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811037640.4A CN109259900B (en) | 2018-09-06 | 2018-09-06 | Acetabular prosthesis, hip joint prosthesis and method for implanting an acetabular prosthesis |
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| CN201811037640.4A CN109259900B (en) | 2018-09-06 | 2018-09-06 | Acetabular prosthesis, hip joint prosthesis and method for implanting an acetabular prosthesis |
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| CN109259900B true CN109259900B (en) | 2023-08-22 |
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| CN117399774B (en) * | 2023-12-12 | 2024-04-16 | 北京市春立正达医疗器械股份有限公司 | CVD hip joint vacuum diffusion welding prosthesis manufacturing method and hip joint prosthesis |
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| CN109259900A (en) | 2019-01-25 |
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