Abstract:
This invention provides an Osseo-inductive metal implant for a living body and the producing method thereof and, more particularly, the Osseo-inductive metal implant for a living body according to the present invention is produced by forming, on the surface of the metal implant, the layer of metal oxide and the layer of bio-active material injected.
Abstract:
A prosthetic joint ball (10) is receivable in a prosthetic joint socket (12) to form a prosthetic joint. The ball is generally spherical (14) and is mounted on a stem. The outer rounded surface of the ball is provided with a layer (20) of CVD diamond, prepared by mechanical polishing to present a surface with an RA of 20 nm or less. The ball is formed of a silicon carbide or similar substrate and includes a rounded recess (22). Mounted in the recess is a metal insert (26) formed of a cobalt-chromium alloy or titanium alloy. The metal insert includes a socket(30) which is shaped and sized to receive, in use, the tapered end of the stem.
Abstract:
A n orthopedic implant with a diffusion-hardened surface on non-load bearing areas of the implant for interaction with non-load bearing surfaces of a polymeric bio-compatible material, such as UHMWPE (ultra-high molecular weight polyethylene). The orthopedic implant is a mobile-bearing knee prosthetic and system where a coating of oxidized zirconium is formed on the post of the tibial tray of the prosthetic for interaction with an opening of a polymeric tibial insert. The diffusion-hardened surface of the orthopedic implant provides a strengthened post and reduction in wear in the opening of the polymeric insert.
Abstract:
An orthopedic implant (50) with a diffusion-hardened surface on non-load bearing areas (54, 55, 56) of the implant for interaction with non-load bearing surfaces of a polymeric bio-compatible material, such as UHMWPE. The orthopedic implant is a posterior stabilized knee prosthetic and system where a coating of oxidized zirconium is formed on the cam of the femoral prosthetic for interaction with the central post of a polymeric tibial insert. The diffusion-hardened surface of the orthopedic implant provides a strengthened cam and reduction in wear in the central post of the polymeric tibial insert.
Abstract:
Textured surface (12) having micro recesses (20) such that the outer surface overhangs the micro recesses. Embodiments of the textured surface include sharp edges for promoting bone deposition and growth within the micro recesses, protrusions of varying depth from the surface that include overhangs, and micro recesses that are at least partially defined by complex ellipsoids.
Abstract:
Method for producing a multiplicity of undercut micro recesses in a surface (12) of an article (10), such that the article exhibits a greater fractal area at a level below the surface than is exhibited at the surface (12). The method comprises applying a maskant layer to a selected surface of the article (10), removing the maskant layer in selected loci to expose underlying portions of the article surface in a selected pattern, applying an etchant to the exposed underlying surface portions for a time sufficient to etch the exposed portions of the article (10) and to enable the etchant to etch beneath portions of the remaining maskant layer, and removing the remaining maskant layer to provide the surface in exposed condition with the multiplicity of undercut recesses, to provide an engineered pattern of the recesses.
Abstract:
An implantable prosthetic acetabular component (10) comprising two metal layers (87, 90). The top or first metal layer (87) engages bone and the second metal layer (90) engages a polyethylene bearing (35). The metal base construct (10) is composed of two different metals. By combining the different material characteristics of two different metals in the metal bone construct, it is possible to simultaneously form a bone ingrowth enhancing surface and a frictionless polyethene-engaging surface.
Abstract:
A tissue expansion device is composed of a hollow expanding pouch (5) made of resorbable material that can be attached to a cannula (6). The pouch (5) can be filled with biocompatible materials, one or more times in a few days interval, after the insertion of the device. While filling the pouch (5) every few days, the tissue expands and the filling material, if it is bioactive, starts to function. The cannula (6) is connected to the pouch (5) in one side and in the other side it can be filled and closed with a screw (7). There are three fixation components. One fixating components is slot (8) and the other two are holes (9) for sutures.
Abstract:
Many medical implants have roughened surfaces that promote cell, bone or tissue adhesion as well as the adhesion of bone cement, for better affixing of the implants in the body. The roughened surfaces should be free of particulates, such as commonly arise from the blasting of implant surfaces with particulates to produce a desired surface finish. A method of producing implants with implant surfaces free of such particulates is to blast the implant surface with a biocompatible liquid, such as water, under high pressure. Under certain circumstances, a solvent may contain particulates that assist in producing the roughened surface, and the particulates are dissolved, sublimated or vaporized from the implant surface, leaving no particulate residue.