31 results about "Prosthesis Loosenings" patented technology

The invention discloses a biotype artificial hip joint surface replacement prosthesis comprising a hemispheric prosthesis cap, which is cooperated with the shape of the caput femoris and is disposed on the caput femoris; a carrying steel plate, which is fixedly disposed on one side of the tuberosity of the caput femoris; a carrying column; an inserting column; a main bolt used for fixing the carrying column; and at least one auxiliary bolt. The invention can be used to prevent the loosening of the prosthesis and the fracture of the femoral neck around the prosthesis effectively.

The invention provides a transplant for repairing articular cartilage defects. The transplant comprises at least one of autologous costicartilage and allogeneic costicartilage; the transplant can be specially a whole-section costicartilage or cartilage particle combined hydrogel transplant. The invention further relates to application of the transplant and a method for repairing the articular cartilage defects. The transplant and method for repairing the articular cartilage defects and the application of the transplant have the advantages that by adopting costal cartilage grafting, vice-damageis small, and minimally invasive operation can be carried out to avoid the risk of prosthesis loosening, infection and other complications which are caused by artificial joint replacement; the amountof the costicartilage is sufficient, and the needs of multiple times of cartilage reconstruction and revision surgeries can be met; it can be achieved that the reconstruction of the damaged articularcartilage surface is personalized, and the repairing method with higher safety and stronger operability is provided for patients with the articular cartilage defects.

The invention provides a modular shoulder joint prosthesis and its manufacturing method, which includes: a scapular prosthesis, a glenoid prosthesis and a humeral prosthesis, the glenoid strut free end of the glenoid prosthesis is connected to the glenoid prosthesis The glenoid part of the scapula prosthesis is movable and pivotally arranged, and the glenoid inner sleeve of the glenoid prosthesis is set in the articulation groove of the humeral head of the humerus prosthesis; and the outer wall of the humerus stem is covered with a bone beam structure. In this way, a complete set of scapular prosthesis, glenoid prosthesis and humeral prosthesis can be provided, which can meet the needs of patients with damaged humerus, glenoid and scapula, and also truly simulate the relationship between the human scapula and glenoid. The relative activity relationship between them, and the outer wall of the humeral stem is covered with a bone trabecular structure, so that human tissue can be quickly and firmly attached to the prosthesis, and it solves the problem of easy loosening of the prosthesis caused by bone cement and the release of the monomer during polymerization. A large amount of heat causes problems such as damage to surrounding tissues.

The invention discloses a manufacturing method of an individualized customized knee joint topological optimization bionic prosthesis based on 3D printing, which relates to the technical field of medical artificial joints. The problem that the manufacturing method is urgently needed to reduce prosthesis looseness or fracture around the prosthesis is solved, and the method comprises the steps: establishing and assembling a tibia model and a knee joint prosthesis model, and performing finite element analysis and topological optimization; carrying out fairing; designing a specific structure of themodel, optimally reserving an internal region by adopting a solid structure, optimally reserving an outer layer region and optimally removing the region by adopting a grid structure, and forming a gradient between the regions; introducing back an assembly state of a tibia model, performing finite element analysis, comparing with a first finite element analysis result, judging whether 3D manufacturing and application are performed or not, and performing topological optimization again if the 3D manufacturing and application cannot be performed. The prosthesis prepared by the invention reduces the problem of prosthesis looseness or prosthesis peripheral fracture, provides space for ligament stop point implantation and internal bone grafting, is light in weight, and is beneficial to bone tissue ingrowth.

The invention discloses a custom radial head prosthesis based on the three-dimensional anatomy of the proximal radius of the healthy side, and belongs to the field of radial head prosthesis customization. The radial head prosthesis is customized based on the three-dimensional anatomy of the proximal radius of the healthy side. Excellent matching and excellent biomechanical properties can effectively avoid the osteoporosis of the humeral capitulum and the destruction of the articular cartilage surface. In addition, during the staged printing process, a cartilage support layer can be formed in the outer cartilage layer as in the prior art, so that the cartilage support layer can be formed. The supporting strength of the cartilage layer itself is high, which effectively avoids the loosening of the prosthesis after the partial abrasion of the cartilage on the prosthesis in the prior art. At the same time, when the outer cartilage layer is partially worn away, the cartilage in the radial bone layer with multiple permeable holes grows. The fluid leaks out along the worn area, effectively guiding the growth of chondrocytes at the worn area, thereby realizing the self-repairing effect of the worn cartilage. Compared with the existing technology, it can effectively ensure the compatibility between the prosthesis and the patient, and improve the internal prosthesis of the patient. service life of the body.

The invention disclosed a kind of super high molecular weight polyethylene / medicine compounded artificial joint as well as the preparing method and the prepared coax joint. The materials of the invention include 99.5-90 shares (by weight) of super high molecular weight polyethylene and 0.5-10 shares of medicine that can restrain osteolysis. After implanting the invention in human bodies, it can prevent the ostelysis of artificial hip joint and total knee prosthesis under common conditions; it can also prevent the cinch of prosth, prolong the service life of artificial joints, and ease the pain and burden of patients.

The invention provides application of melatonin to the preparation of a medicine for treating loose periprosthetic chronic inflammation and bone destruction. The chemical structural formula of melatonin is shown in a specification, and the medicine comprises a compound at pharmaceutically effective dose and a pharmaceutically acceptable carrier. According to the application, a novel medicinal prospect of melatonin is explored, a novel medicinal area is developed, the application has an exact effect of prosthesis loosening, and has the purpose of effectively preventing and treating prosthesis loosening caused by wear particles, besides, expression of inflammatory factors can be obviously reduced, inflammatory response caused by the wear particles is reduced, osteoclast activation is restrained, the formation of local new bones after osteolysis is promoted, and bone destruction caused by the wear particles is reduced.

The invention discloses an artificial elbow joint surface replacement prosthesis, which comprises: a prosthesis part that matches the shape of the distal end of the humerus and is placed on the distal end of the humerus; The internal fixation plate and external fixation plate of the lateral column; the prosthesis part is a hollow cylindrical structure, the external shape of the prosthesis part is the same as the articular surface shape of the distal humerus, and the external contact surface is a smooth coating surface and is compatible with the ulna The proximal end is in contact with the articular surface; the end of the internal fixation steel plate connected to the prosthetic part has a first connection part and a second connection part, and the first connection part and the second connection part are respectively located in two mutually perpendicular planes. The present invention can avoid the loss of bone mass caused by extensive stripping of soft tissue around the elbow joint, osteotomy, reaming and other operations in the process of prosthesis replacement, can avoid the prosthesis loosening of the inserted prosthesis, and can also reduce the The incidence of deep infection caused by the operation.