Beijing Ak Medical Co., Ltd.

Beijing Bytedance Network Technology Co., Ltd.

Weiping Zhang

Hong Cai

Tuo Zhou

The disclosure provides a cartilage substitute, which includes at least one cartilage unit, the cartilage unit including: a base, including a subcutaneous layer portion forming contact friction with a corresponding skeleton, a deep layer area portion contacting with a target skeleton and an intermediate layer portion provided between the subcutaneous layer portion and the deep layer area portion. A fluid storage cavity is disposed in the subcutaneous layer portion. A first communicating passage is disposed in the subcutaneous layer portion. A second communicating passage is disposed in the intermediate layer portion, a third communicating passage is disposed in the deep layer area portion. The fluid storage cavity, the second communicating passage and the third communicating passage are disposed to gradually increase hardness of the subcutaneous layer portion, the intermediate layer portion and the deep layer area portion.

Cartilage substitute

The present invention discloses a metal-ceramic composite joint prosthesis and applications and a manufacturing method thereof. The joint prosthesis comprises a metal body and a ceramic body, wherein the metal body is integrally formed and comprises a porous structure layer, a boundary layer and a root-like layer, the boundary layer is located between the porous structure layer and the root-like layer, the root-like layer comprises a plurality of root-like filament clusters connected to the boundary layer but not in contact with one another, each root-like filament cluster comprises a main root perpendicularly connected to the boundary layer and a plurality of fibrous roots connected to the lateral side of the main root, the fibrous roots extend obliquely towards the side away from the boundary layer, and the ceramic body covers the root-like filament clusters and is formed on the boundary layer. The joint prosthesis achieves the compositing of metal and ceramic, thereby achieving both a wear-resistant ceramic body required for a joint friction surface and a porous metal structure with a good bone ingrowth effect required for an osseointegration surface. The root-like filament clusters of the root-like layer are rooted in the ceramic body, to form a tight and stable connection between the ceramic body and the metal body, and the root-like clusters being not in contact with one another prevents the ceramic body from locally breaking or cracking.

Metal-ceramic composite joint prosthesis and applications and manufacturing method thereof

The disclosure provides a meniscus substitute and a knee joint prosthesis with the meniscus substitute. The meniscus substitute includes: a base body, disposed on a tibial plateau or a tibial plateau prosthesis of a tibia; a polymer joint body, disposed on the base body; and a bone screw, disposed in the tibia in a penetration manner and connected with the base body.

Meniscus substitute and knee joint prosthesis with meniscus substitute

The disclosure provides an articular gasket prosthesis and an articular prosthesis with the articular gasket prosthesis. The articular gasket prosthesis includes an elastic gasket disposed between a first skeleton and second skeleton forming a joint, the elastic gasket including: an elastic matrix, having a first contact surface facing the first skeleton and a second contact surface facing the second skeleton; and multiple synovial fluid passages, distributed in the elastic matrix and communicating the first contact surface and the second contact surface, the multiple synovial fluid passages being disposed according to a predetermined manner to gradually increase hardness of the elastic matrix from a center to an edge and gradually decrease elasticity of the elastic matrix from the center to the edge.

Articular gasket prosthesis and articular prosthesis with articular gasket prosthesis

Portable printer

The disclosure provides an articular fossa prosthesis and an articular prosthesis with the articular fossa prosthesis. An outer cup of the articular fossa prosthesis is disposed in a target skeleton, a lining is disposed in the outer cup, an articular head structure may be movably disposed in the lining, a first communicating passage communicated with an articular capsule is disposed on the outer cup, a second communicating passage communicated with the articular capsule is disposed on the lining, and the first communicating passage is communicated with the second communicating passage to guide a synovial fluid to a contact surface between the lining and the articular head structure.

Articular fossa prosthesis and articular prosthesis with articular fossa prosthesis

The present invention provides a fused femoral stem system, including a curved short handle, a fixing mechanism and a femoral head prosthesis, one end of the curved short handle is provided with a conical connector, the conical connector is cooperatively connected with a conical connecting hole of the femoral head prosthesis, the other end of the curved short handle is inserted from the osteotomy surface of the femoral neck and stretches to the position of a medullary cavity below a small trochanter, and the curved short handle is connected and fixed with a large trochanter through the fixing mechanism. The present invention has the beneficial effects that, after the growing-in osseointegration with the sclerotin surrounding the proximal bone bed of the host after the surgery of the whole system, the mechanical influence on the retained femoral neck and the sclerotin in the vicinity of the large and small trochanters is substantially similar to the biomechanical state prior to the surgery.

Growing community of inventors

Beijing, China

Weiping Zhang