An artificial knee joint implant with which it is possible to increase the tolerance for rotational movement together with increasing the binding force of the femoral component and tibial component in the longitudinal and lateral directions of a patient. An artificial knee joint implant 1 has a femoral component 2 fixed to the distal portion 102 of the femur 101 of a patient, and a tibial component 3 fixed to the proximal portion 104 of the tibia 103 of the patient. The femoral sliding surfaces 20A, 20B of the femoral component 2 and the tibial sliding surfaces 23A, 23B of the tibial component each include regions where the radius of curvature varies in accordance with progression along a prescribed direction.
An instrument for artificial knee joint replacement surgery is provided, with which the position of a desired region in the body of a patient can be specified with ease. The present invention is provided with: a holding mechanism 2 which includes a holding part 4 having contact parts 6 to be brought into contact with contact objects of a patient undergoing artificial knee joint replacement surgery, and which is held against the patient while the contact parts 6 are in contact with the contact objects; and an indicating mechanism 3 provided with a part 18 for indicating an object to have the position thereof specified, i.e. a region, in the patient, to have the position thereof specified, said part 18 being attached to the holding mechanism 2, and being disposed in a position corresponding to the object to have the position thereof specified, while the holding mechanism 2 is being held against the patient. The position where the part 18 for indicating the object to have the position thereof specified is disposed is preoperatively determined on the basis of the positional relationship between the contact objects and the object to have the position thereof specified, said positional relationship having been obtained in advance.
Provided is a surgical assistance apparatus or the like with which the state of an affected area after surgery has started can be preoperatively confirmed more accurately. The surgical assistance apparatus (1) is provided with an image processing unit (5). The image processing unit (5) generates projection image data on the basis of measurement data obtained by measuring an affected area (101) of a patient (100), to generate a projection image (24) as the image specified by the projection image data. The projection image (24) is for being projected onto the patient (100), and includes an image which indicates the state of the affected area (101) after surgery has started.
A61B 90/00 - Instruments, outillage ou accessoires spécialement adaptés à la chirurgie ou au diagnostic non couverts par l'un des groupes , p. ex. pour le traitement de la luxation ou pour la protection de bords de blessures
A61B 17/56 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet
Provided is a vertebral surgery instrument with which an immobilizing rod is easy to insert in the slit of a vertebral implant and the configuration of which has been simplified. A vertebral surgery instrument (1) is provided with: an engaging section for engaging with a pair of opposing parts (81, 81), which form a slit into which a fixing rod is inserted to fix multiple vertebrae to each other, when a vertebral implant (60), which is equipped with the pair of opposing parts (81, 81) or on which same are installed, is fixed in a vertebra; and a pair of guiding parts (23, 24) provided as a unit with the engaging section or installed on the engaging section. The pair of guiding parts (23, 24) are formed so as to extend away from each other and toward the side where the fixing rod is to be inserted when the engaging section is engaged with the pair of opposing parts (81, 81) and a guiding passage (29) formed between the pair of guiding parts (23, 24) is in communication with the slit.
A61B 17/58 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet pour ostéosynthèse, p. ex. plaques, vis ou matériels de fixation
Provided is a measurement instrument for joint surgery with which it is possible to move a first bone and a second bone, which are connected by soft tissue in a joint, relative to each other in a direction other than that in which the bones move away from each other, and measure the stability of the connection state between the bones. A housing (11) is provided so that the housing (11) can be fixed to the first bone (101). A slider (12) is provided so as to be slidable on the housing (11), and provided so that the slider (12) can be brought into contact with the second bone (102). A position display (13a) displays the position of the slider (12) relative to the housing (11). In the measurement instrument (1) for joint surgery, the slider (12) moves in a sliding manner relative to the housing (11), whereby the second bone (102) is moved relative to the first bone (101) along a joint surface. The stability of the connection state between the first bone (101) and the second bone (102) is measured on the basis of the position of the slider (12) relative to the housing (11) displayed on the position display (13a).
Provided is a measuring instrument for use in artificial knee joint replacement surgery, with which alignment measurements of a knee joint can be made more accurately. This measuring instrument (1) for use in artificial knee joint replacement surgery is provided with a guide part (6). The guide part (6) is used to indicate, from outside the patient (100), the location of the femur head center (P1) of the hip joint (102) of the patient (100). The guide part (6) indicates the location of the femur head center (P1) in the patient (100), positioned on the basis of the premeasured relative positions of the femur head center (P1) and the anterior superior iliac spine (107), which positions can be viewed from outside the patient (100).
This stem for an artificial hip joint is provided with a stem body divided into a stem proximal part, a stem distal part, and a stem intermediate part located between the stem proximal part and the stem distal part, and the stem body has a rough face having a surface roughness (Ra) of 10-80 µm located on the stem proximal part, a smooth/satin face having a surface roughness (Ra) of 0.1-1.0 µm located on the stem intermediate part, and a shiny face having a surface roughness (Ra) of less than 0.1 µm located on the stem distal part. Provided is an artificial hip joint provided with the stem for an artificial hip joint.
In a cross-section view of an artificial hip joint stem according to the present invention parallel to the central axis of the stem and including an interior wall part and an exterior wall part, the distance between the interior wall part and the exterior wall part gets shorter the further away they are from an aperture part, and in a cross-section view parallel to the central axis of the stem and including an anterior wall part and a posterior wall part, both the anterior wall part and the posterior wall part have flat regions. A stem inserter according to the present invention is provided with a disc-shaped leading end part. Provided are an artificial hip joint system provided with the artificial hip joint stem and the stem inserter, and an artificial hip joint provided with the artificial hip joint stem.
This invention measures a contact angle on a sample curved surface more accurately. This contact-angle measurement method is used to measure the contact angle (γ) between a sample curved surface (104) and a liquid droplet (2) supplied thereto. Said method includes the following steps: an apparent-contact-angle computation step in which an apparent contact angle (α) for the liquid droplet (2) is computed using a captured image of the sample curved surface (104) and the liquid droplet (2) supplied thereto; an inclination-angle computation step in which the captured image is used to compute the inclination angle (β) of the sample curved surface (104) at the outside edge (2a) of the contact area between the sample curved surface (104) and the liquid droplet (2); and a contact-angle computation step in which said inclination angle (β) is used to correct the abovementioned apparent contact angle (α) so as to compute the abovementioned contact angle (γ).
Provided are a prosthetic member that is unlikely to exhibit reduced mechanical performance even in the presence of squalene and a production method for said prosthetic member. This prosthetic member (1) exhibits excellent antioxidative properties and is characterized by comprising: a substrate (2) that contains an antioxidant and a polymer material; and a polymer film (40) that comprises a (meth)acrylate compound and that covers the surface (20) of the substrate (2). The production method for the prosthetic member (1) includes: a step in which the substrate (2) that contains an antioxidant and a polymer material is formed; a step in which the surface (20) of the substrate (2) is cleaned using a cleaning liquid; and a step in which the cleaned surface (20) of the substrate (2) is coated with the polymer film (40) that comprises a (meth)acrylate compound.
Provided is an artificial knee joint implant that can be adjusted to properly balance the ligaments. The invention constitutes an artificial knee joint implant having tibial sliding surfaces (53, 54, 63, 64, 73, 74) that slide against femoral components (2, 3, 4) and a plurality of types of tibial plates (5, 6, 7) that differ from each other in at least the position of the tibial sliding surfaces (53, 54, 63, 64, 73, 74) relative to the tibia in a state of being fixed to the tibial tray attached to the tibia or the shape of the tibial sliding surfaces (53, 54, 63, 64, 73, 74).
In the present invention, when an extender is removed from a spinal implant, the extender is removed without using a separate apparatus, and the loss of a material to be discarded is reduced. A head part (22) of a spinal implant (2) has the following: a base part (24) provided as a portion of a screw part (21) side; and a pair of tab parts (25) that extend from the base part (24) to the side opposite the screw part (21). The pair of tab parts (25) have formed thereon tab part-side joining parts (31) to which extender-side joining parts join, the extender-side joining parts being formed at extenders which are attached to the pair of tab parts (25) and are for guiding a fixing rod to a slit (23). Between the base part (24) and the pair of tab sections (25), a weak section (26) is formed that breaks due to an external force from the extenders which are joined to the pair of tab parts (25), and that causes the pair of tab parts (25) to separate from the base part (24).
A61B 17/58 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet pour ostéosynthèse, p. ex. plaques, vis ou matériels de fixation
A61B 17/56 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet
This femoral component trial for the knee joint is provided with a trial main body having: a medial condyle and lateral condyle located at a distance from one another on an outer surface; a substantially rectangular through hole which is located, in exterior view, between the medial condyle and the lateral condyle, and for which the long edges are an inner wall outer edge located along the front/back direction and the short edges are an inner wall outer edge located along the left/right direction; a first guide slit that is located in front of and above the through hole and extends along the left/right direction; and four second guide slits extending along the long edges from each of four corner parts of the through hole.
The present invention relates to an artificial hip joint capable of ensuring fitting length without an increase in the overall height of a caput sphere, avoiding concentration of stress, and alleviating stress generated in the caput sphere. The artificial hip joint comprises: a stem (6) having a neck part (5), which has a truncated cone-shaped external peripheral surface (4) in which the diameter is reduced in progress toward a distal end (3); a caput sphere (8) in which a recess (7) is formed for allowing the neck part (5) to be inserted, and in which the inner surface defining the recess (7) includes a truncated cone-shaped internal peripheral surface (10) in which the diameter is reduced in progress toward the insertion direction of the neck part(5); and a sleeve (2A) disposed between an external peripheral surface (4) of the neck part (5) inserted into the recess (7) and the internal peripheral surface (10) of the caput sphere (8). The sleeve (2A) has an internal peripheral part (13) for making contact with the external peripheral surface (4) of neck part (5), and an external peripheral surface (16) for making contact with the internal peripheral surface (10) of the caput sphere (8) using the retracted position in the insertion direction (A) from an opening part (14) of the recess (7) as the starting end.
Provided is a device for driving an artificial cardiopulmonary pump, the device being easy to handle, capable of use in the operating room, capable of implementation in a portable structure, and capable of easily handling even situations in which emergency blood circulation support is necessary. The device is provided with a portable module unit (21) that can be carried and a base unit (22), to which the module unit (21) is detachably connected. The module unit (21) comprises a motor (25) for driving an artificial cardiopulmonary pump (12), a control unit (27), a flow meter-connecting section (28), a display unit (29) for displaying the blood flow, a base-connecting section (30) that is electrically connected to the base unit (22), and a module-side battery (31). The base unit (22) comprises a switching power supply (42), sensor-connecting sections (43) that are connected to sensors (18, 19) for detecting information relating to the blood, and a module-connecting section (44) that is electrically connected to a module unit (21).
A61M 1/00 - Dispositifs de succion ou de pompage à usage médicalDispositifs pour retirer, traiter ou transporter les liquides du corpsSystèmes de drainage
A61M 1/10 - Pompes pour le sang; Cœurs artificiels; Dispositifs pour aider mécaniquement la circulation, p.ex. pompes à ballon intra-aortique
16.
METHOD FOR PRODUCING BIOLOGICAL IMPLANT MATERIAL, BIOLOGICAL IMPLANT MATERIAL, AND TITANIUM-CONTAINING AQUEOUS ALKALI SOLUTION
A method for producing a biological implant material whereby a coating film of an alkali metal titanate can be formed on the surface of a base, a biological implant material, and a titanium-containing aqueous alkali solution. The method for producing a biological implant material comprises: a preparation step for pouring into an aqueous alkali solution a titanium material in an amount exceeding the solubility to prepare a titanium-containing aqueous alkali solution in which titanium is precipitated; and an immersion step for immersing a base, said base comprising a non-titanium metal material, a ceramic material or a polymer material, in the aqueous titanium solution prepared in the preparation step to thereby form an alkali metal titanate layer on the surface of the base.
A61L 27/00 - Matériaux pour prothèses ou pour revêtement de prothèses
A61C 8/00 - Moyens destinés à être fixés à l'os de la mâchoire pour consolider les dents naturelles ou pour y assujettir des prothèses dentairesImplants dentairesOutils pour l'implantation
The purpose of the present invention is to provide a liquid supply device and biological cleaning device that, by supplying a sterile liquid including low-flow, low-pressure microbubbles, can dramatically increase cleaning effects and clean quickly and neatly without damaging a biological tissue. A liquid cleaning device (3), having a supply flow path (2) for supplying a liquid including microbubbles to a cleaning instrument (1) for cleaning an organism and to a cleaning target such as a medical instrument, is characterized by being provided with a tube pump (5) for delivering the liquid to the supply flow path (2) and a microbubble generator (B) that is provided midway on the supply flow path (2)and is for causing microbubbles to be generated in the liquid.
B01F 5/06 - Mélangeurs dans lesquels les composants du mélange sont pressés ensemble au travers de fentes, d'orifices, ou de tamis
A61B 19/00 - Instruments, outillage ou accessoires pour la chirurgie ou le diagnostic non couverts par l'un des groupes A61B 1/00-A61B 18/00, p.ex. pour stéréotaxie, opération aseptique, traitement de la luxation, protecteurs des bords des blessures(masques de protection du visage A41D 13/11; blouses de chirurgien ou vêtements pour malades A41D 13/12; dispositifs pour retirer, traiter ou transporter les liquides du corps A61M 1/00)
B01F 3/04 - Mélange, p.ex. dispersion, émulsion, selon les phases à mélanger de gaz ou de vapeurs avec des liquides
B08B 3/10 - Nettoyage impliquant le contact avec un liquide avec traitement supplémentaire du liquide ou de l'objet en cours de nettoyage, p. ex. par la chaleur, par l'électricité ou par des vibrations
Provided is an artificial joint stem which can reduce manufacturing labor, can increase strength through avoiding stress concentration, and has a high degree of freedom of shape; also provided are an artificial joint stem component and an artificial joint stem manufacturing method. A stem (4) is provided with a stem main unit (6) and a porous unit (7) which has a porous body (21) and is connected to the stem main unit (6). The stem main unit (6) has an insertion part (11) for insertion into the medullary cavity (102b) of the femur (102). The porous unit (7) is a cylindrical single part formed by lamination of a metal powder having bioaffinity and is arranged so as to surround the proximal part of the insertion unit (11).
Provided is a technique for washing a body fluid, a foreign body or excrement in a living body rapidly and cleanly without damaging biological tissues. A body fluid, a foreign body or excrement in a living body can be washed by bringing the body fluid, the foreign body or the excrement into contact with a washing solution containing micro-bubble water.
A61M 27/00 - Appareillage pour drainage des blessures
A61M 1/00 - Dispositifs de succion ou de pompage à usage médicalDispositifs pour retirer, traiter ou transporter les liquides du corpsSystèmes de drainage
A61M 3/00 - Seringues médicales, p. ex. clystèresIrrigateurs
The purpose of the present invention is to provide a method for producing a sliding material which has excellent wear resistance and oxidation resistance. A method for producing a sliding material (10) of the present invention is characterized by comprising: a step wherein a base (12) that contains a radical scavenger and a polymer material is molded; a step wherein at least a part (16) of the surface of the base (12) is cleaned with a cleaning liquid; and a step wherein a polymer film (30) is formed on at least the part (16) of the surface by immobilizing a polymer chain having a phosphorylcholine group on at least the part (16) of the surface after the cleaning by graft bonding.
The present invention relates to a dental implant which can prevent peri-implant diseases, and of which the affinity of a jaw bone implantation part that is to be implanted into a jaw bone for a jaw bone is not inhibited. In the dental implant (10), at least a region (12a), which is a region to be in contact with a gum (D), of a gum contact part (12) is anti-bacterially treated, and the region (12a) has an arithmetic average roughness (Ra) of 2 μm or less. At least the region (12a) of the gum contact part (12) is imparted with an anti-bacterial property, and has a surface shape onto or on which bacteria rarely adhere or remain and which can contact closely with a gum (D).
A61C 8/00 - Moyens destinés à être fixés à l'os de la mâchoire pour consolider les dents naturelles ou pour y assujettir des prothèses dentairesImplants dentairesOutils pour l'implantation
22.
FILM-PRODUCING DEVICE AND METHOD FOR PRODUCING ARTIFICIAL JOINT COMPOSITE
The present invention relates to a configuration for forming a polymer layer on a base metal surface of an artificial joint composite. The purpose is successful miniaturization while accurately controlling UV ray irradiation intensity such that a polymer layer of uniform thickness can be formed with no or minimal UV ray effect on workers or facilities. A film-producing device body 20 forms a polymer layer 12 on an inside surface 11e of a base metal 11 of an artificial joint composite by light-induced graft polymerization. The film-producing device body 20 comprises multiple UV ray LED elements 60 and a work holder 24. A solution 23 containing a polymer monomer is brought into contact with the inside surface 11e of the base metal 11 on the work holder 24. The multiple UV ray LED elements 60 radiate UV rays over a region that is broader than the region irradiated by a single UV ray LED element 60.
Provided is a production method for producing a biological implant material having excellent bindability to a hard tissue. The method for producing a biological implant material according to the present invention comprises an alkali treatment step and a warm water treatment step, wherein the alkali treatment step comprises immersing a base formed from titanium or a titanium alloy in an aqueous alkaline solution and the warm water treatment step comprises immersing the base that has been immersed in the aqueous alkaline solution in warm water having a liquid temperature of 30˚C or higher and lower than 40˚C for 3 to 36 hours inclusive.
A61L 27/00 - Matériaux pour prothèses ou pour revêtement de prothèses
A61C 8/00 - Moyens destinés à être fixés à l'os de la mâchoire pour consolider les dents naturelles ou pour y assujettir des prothèses dentairesImplants dentairesOutils pour l'implantation
24.
MEDICAL CERAMIC MATERIAL AND MANUFACTURING METHOD THEREOF
This medical ceramic material, which is a color other than black and white, and is specifically blue, ensures sufficient durability, and maintains a beautiful appearance by sufficiently suppressing color differences before and after irradiation with γ-rays for sterilization. This medical ceramic material is formed using a composite material containing alumina and zirconia. The composite material contains cobalt oxide. Defining the mass of the composite material without cobalt oxide to 100 mass%, the cobalt oxide content is set to 0.2-1.0 mass%.
C04B 35/10 - Produits céramiques mis en forme, caractérisés par leur compositionCompositions céramiquesTraitement de poudres de composés inorganiques préalablement à la fabrication de produits céramiques à base d'oxydes à base d'oxyde d'aluminium
Provided is a bioimplant that enables long-term prevention of post-surgical biofilm formation. In this bioimplant, a spray coating comprising a calcium phosphate material is formed on at least a portion of a substrate formed from metal, ceramic, or plastic, and the silver concentration in the spray coating is 0.05 to 3.00 wt%.
An objective of the present invention is to provide an artificial knee joint implant with which it is possible to carry out a more natural pivot motion. An artificial knee joint implant (1) includes a femur component (2) and a tibia plate (4), which make contact with one another. The femur component (2) further includes a first joint face (11) which is positioned in contact with a patient's inner side collateral ligament (105), and a second joint face (12) which is positioned in contact with the patient's outer side collateral ligament (106). The first joint face (11) and the second joint face (12) respectively further comprise a first pivot guidance unit (46) and a second guidance pivot guidance unit (48). A reference plane (43) which extends orthogonally to the horizontal direction is regulated between the first joint face (11) and the second joint face (12). A reduction quantity (ΔD2) of a distance (D2) between a second contact part (42) at the second pivot guidance unit (48) and the reference plane (43) with the increase of a unit bending angle is set to be greater than a reduction quantity (ΔD1) of a distance (D1) between a first contact part (41) at the first pivot guidance unit (46) and the reference plane (43) with the increase of the unit bending angle.
The purpose of the present invention is to obtain a surface modification member that can be favorably adhered to an implant material in a method for bonding together the surface modification member and the implant material by using a slurry comprising a metal powder. The present invention is a metallic porous plate that is bonded to the surface of an in vivo implant material, wherein the biomedical metallic porous plate is characterized in that the surface area (A) of holes (a) present on the surface of the side facing the implant material is less than the surface area (B) of holes (b) present on the surface of the side facing the body, and the holes (a) communicate through to the body side. This biomedical metallic porous plate is preferably produced by laminate molding.
NATIONAL UNIVERSITY CORPORATION TOKYO MEDICAL AND DENTAL UNIVERSITY (Japon)
Inventeur(s)
Nomura, Naoyuki
Hanawa, Takao
Abrégé
Provided is a Co-Cr-Mo alloy having excellent mechanical properties including yield strength and tensile strength. The present invention is an implant Co-Cr-Mo alloy comprising, in mass%, more than 30% and 36% or less of Cr, 5 to 8% of Mo, 0.20 to 0.65% of N, and a remainder made up by Co and unavoidable impurities, and characterized by being produced by lamination machining. In the implant Co-Cr-Mo alloy according to the present invention, the solidification structure is a dendritic structure, wherein the primary arm spacing of the dendritic structure is preferably 5 μm or less.
The present invention relates to a PS-type artificial knee joint implant with which a gap balance may be adjusted to achieve a stable deep flexion operation, burden on medical personnel or a patient may be reduced, and the patient may perform a natural flexion movement. An artificial knee joint implant (1) of the present invention comprises femur components (100, 200, 300) selectively installed at a distal portion of a femur of the patient, and tibial inserts (400, 500, 600) selectively installed at a proximal portion of a tibia of the patient. Each of the femur components (100, 200, 300) comprises a cam portion (203) disposed between rear portions of two femur joint surfaces (107, 107; 207, 207; 307, 307). The tibial inserts (400, 500, 600) comprise posts (402, 502, 602) which may be connected to the cam portion (203). The posts (402, 502, 602) have different antero-posterior positions.
The purpose of the present invention is to improve reliability of a testing method for guaranteeing strength of ceramic components. In this strength guarantee test method, unused ceramic components are totally inspected. The method is characterized in that a previously set load is applied to the ceramic components, and at the same time, acoustic emission measurement is performed, and ceramic components, which do not break during the test and have a threshold value acoustic emission energy change quantity or less, are determined acceptable.
G01N 3/20 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique en appliquant des efforts permanents de flexion
G01N 29/14 - Recherche ou analyse des matériaux par l'emploi d'ondes ultrasonores, sonores ou infrasonoresVisualisation de l'intérieur d'objets par transmission d'ondes ultrasonores ou sonores à travers l'objet utilisant des techniques d'émission acoustique
Provided is an artificial knee joint with which the amount and rate of roll-back is lower with shallow bending and greater with deep bending. This artificial knee joint has: a femoral component (20) comprising a medial condyle (21), a lateral condyle (22), a first sliding surface (24) posteriorly coupling the medial condyle (21) and lateral condyle (22) and leaving an opening (23) therebetween, and a second sliding surface (25) above the first sliding surface (24); and a tibia plate (30) comprising a medial fossa (31), a lateral fossa (32), a post (36) protruding upward from between the medial fossa (31) and lateral fossa (32) and inserted into the opening (23), a third sliding surface (34) with which the first sliding surface (24) makes contact on the posterior surface of the post (36), and a fourth sliding surface (35) with which the second sliding surface (25) makes contact at a location posterior to the post part (36). The first and fourth sliding surfaces (24, 35) are convex curved surfaces, and the fourth sliding surface (35) is posterior to the third sliding surface (34); depending on the angle of bending, the joint is in either a first sliding state, where the first and third sliding surfaces (24, 34) make contact, or a second sliding state, where the second and fourth sliding surfaces (25, 35) make contact.
Provided is an artificial knee joint capable of controlling the rotation of the knee joint according to the bend angle while also maintaining high stability in the antero-posterior direction. The artificial knee joint is provided with a femoral component that is fixed to the distal end of the femur, and a tibial plate that is fixed to the proximal end of the tibia and slidably accepts the femoral component. The femoral component has a medial condyle and lateral condyle. An opening and an elliptical sliding part, which connects the posterior ends of the medical condyle and lateral condyle and slides on the tibial plate when the knee is bent, are formed between the medial condyle and lateral condyle. The tibial plate is provided with a medial fossa that accepts the medial condyle and a lateral fossa that accepts the lateral condyle. Between the medial fossa and lateral fossa, a spine, which moves in the opening in the antero-posterior direction according to the flexing and extending motions of the knee and which contacts the elliptical sliding part during knee flexion, and a concave sliding surface, which configures the posterior surface of the spine and slidably accepts the elliptical sliding part, are formed. The width of the elliptical sliding part widens continuously from the opening to the posterior end.
Provided is a biological implant that has excellent anti-microbial properties and is very safe in living bodies. For this biological implant, a spray coating comprising a calcium phosphate material is formed on at least a portion of a metal, ceramic or plastic substrate and the silver concentration in the spray coating is 0.02 weight% to 3.00 weight%.
A61L 27/00 - Matériaux pour prothèses ou pour revêtement de prothèses
34.
CAST BASE FOR BIOMEDICAL USE FORMED OF COBALT/CHROMIUM-BASED ALLOY AND HAVING EXCELLENT DIFFUSION HARDENING TREATABILITY, SLIDING ALLOY MEMBER FOR BIOMEDICAL USE AND ARTIFICIAL JOINT
A cast base for biomedical use, which is formed of a cobalt/chromium-based alloy and has excellent diffusion hardening treatability, characterized by containing 0.1 mass% or greater of nitrogen (N) and having a volume fraction of an fcc (face centered cubic lattice) phase in the metallic structure thereof of 50% or greater. Even in the case of subjecting the aforesaid cobalt/chromium-based alloy cast base in the as-cast-state, the structure of which is liable to be non-uniform, to a diffusion hardening treatment, it is possible to obtain a sliding alloy member for biomedical use, wherein a uniform hardened layer has been formed, by the diffusion hardening treatment. Thus, a sliding alloy member for biomedical use and so on, which can stably and continuously exhibit high strength, excellent abrasion resistance and, moreover, excellent corrosion resistance, can be provided.
Provided is a support for guided bone regeneration, said support having such a rigidity as enabling the retention of a desired shape in a bone defect area and being provided with openings through which an extracellular liquid can penetrate but a cell constituting a soft tissue cannot penetrate. The support for guided bone regeneration, which is to be placed in the vicinity of a bone defect area for guiding the regeneration of the defect bone, comprises a foil formed of a biocompatible metal having such a rigidity as enabling the retention of a desired shape. On the foil, multiple openings, through which an extracellular liquid can penetrate but a cell tissue cannot penetrate, are located in a dispersed state.
A61C 8/00 - Moyens destinés à être fixés à l'os de la mâchoire pour consolider les dents naturelles ou pour y assujettir des prothèses dentairesImplants dentairesOutils pour l'implantation
A61B 17/58 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet pour ostéosynthèse, p. ex. plaques, vis ou matériels de fixation
The first purpose of this invention is to provide a high-strength, nickel-free cobalt-based alloy for in-vivo use. Said alloy has a high elastic modulus and is plastically workable. The second purpose of this invention is to provide an X-ray-visible cobalt-based alloy for in-vivo use. The third purpose of this invention is to provide a stent using said alloy. The provided cobalt-based alloy for in-vivo use comprises a cobalt-chromium-tungsten alloy with the addition of a biocompatible alloy element that has the effect of increasing the stacking-fault energy of the alloy.
Disclosed is a metal material—which is for a bioimplant, has excellent bioadhesion, and has a surface that has been treated by sandblasting—wherein the average surface roughness (Ra) is 1-2.5 μm, there is no residual abrasive used in the sandblasting treatment by means of washing with water after the sandblasting treatment, and the composition of the surface of the metal material does not change before and after the sandblasting treatment. The novel metal material for a bioimplant has excellent bioadhesion to bone and the like as a result of having a favorable rough surface, and the abrasive used in the sandblasting treatment is able to be easily removed by washing with water.
A61L 27/00 - Matériaux pour prothèses ou pour revêtement de prothèses
A61B 17/58 - Instruments ou procédés chirurgicaux pour le traitement des os ou des articulationsDispositifs spécialement adaptés à cet effet pour ostéosynthèse, p. ex. plaques, vis ou matériels de fixation
A61C 8/00 - Moyens destinés à être fixés à l'os de la mâchoire pour consolider les dents naturelles ou pour y assujettir des prothèses dentairesImplants dentairesOutils pour l'implantation
brevets