31 results about "Prosthesis Loosenings" patented technology

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 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 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.