39 results about "Articular disc" patented technology

An articular disc prosthesis and method of implanting the same within an intervertebral space between adjacent vertebral bodies. The prosthesis includes a pair of articular components and an articular ball disposed therebetween. Each of the articular components includes an outer shell portion and a removable inner insert portion. The insert portion includes a concave articular surface sized and shaped to receive a portion of the articular ball to provide articulating motion between the articular components. The outer shell portion includes a central hemi-cylindrical portion, a pair of laterally extending flanges, and an axially extending lip. Following removal of the natural intervertebral disc, a pair of hemi-cylindrical recesses are formed along a central region of the adjacent vertebral bodies to a predetermined depth. The prosthesis is implanted within the prepared disc space by axially displacing the hemi-cylindrical central portions of the articular components along the hemi-cylindrical recesses in the vertebral bodies. The lateral flanges and the axial lip of the articular components bear against the endplates of the adjacent vertebral bodies to stabilize the prosthesis and to prevent subsidence.

An intervertebral prosthetic disc for replacing a damaged natural disc includes upper and lower vertebral body engaging surfaces, an exterior wall and one or more generally vertically oriented bone channels of limited cross-sectional area to allow bone to form and fuse into continuous or discontinuous struts between the bodies. The stiffness of the disc, while supporting the bodies, allows the distance therebetween to narrow sufficiently when subjected to a predetermined load such as the patient standing, walking, etc., to transfer sufficient energy to the bone struts to create one or more nonunion joints or pseudoarthrosis at locations along the struts. The disc includes stops to limit the movement thereof to an amount sustainable by the disc without resulting in fatigue failure.

An intervertebral disc implant for use in the spine including a first part and a second part, wherein the first part and second part are configured as a joint prosthesis for the spine. The first part includes one of a concave or convex articulating surface and the second part includes one of the other concave or convex articulating surface. One of the concave or convex articulating surfaces is preferably elliptically shaped in at least one direction and does not match and is different than one of the other concave or convex articulating surfaces.

The invention discloses a temporo-mandibular joint biological condyle constructed based on a tissue engineering related technology. The temporo-mandibular joint biological condyle is characterized bycomprising an upper cartilage layer, a middle cellular hydrogel layer and a lower phrenological compound layer which are mutually laminated, wherein the upper cartilage layer comprises a tissue surface making contact with an upper articular disc, a connecting surface making contact with the middle cellular hydrogel layer and a dense tissue layer positioned between the tissue surface and the connecting surface. According to the temporo-mandibular joint biological condyle disclosed by the invention, on the basis of ensuring accurate control over a three-dimensional morphological structure, functional reconstruction of a temporo-mandibular joint is realized; besides, the temporo-mandibular joint biological condyle has the advantages of reducing operative wound, facilitating the use in the operation, reducing osteotomy and bone grinding change, avoiding skull base damage and massive hemorrhage risk and the like so as to overcome the defects of current artificial joint replacement and costal cartilage grafting; transformation from joint reconstruction and replacement to joint reconstruction and regeneration is realized.