78 results about "Porous implant" patented technology

An implantable medical device includes a porous metal foam or foam-like structure having pores defined by metal struts or webs wherein the porous structure has directionally controlled pore characteristics. The pore characteristics controlled include one or more of the metal structure porosity, pore size, pore shape, pore size distribution and strut thickness. The pore characteristics may vary in one or more directions throughout the structure. Preferably the pore characteristics are controlled to match the porous metal structure to various mechanical and biological requirements of different regions of the structure in order to optimize aspects of the implants performance and may vary not only over the surface of the porous structure but through the depth of the porous structure. The thickness of the porous metal structure may also be modified to establish a thickness profile that optimizes mechanical and biological requirements of the implants performance. Acetabular cup embodiments of the invention are described. Various methods of manufacturing implants having directionally controlled pore characteristics are described.

A system and method for the repair of damaged tissue and bones, congenitally missing tissue / cosmetic reconstruction of tissue is described. The system has a layered porous structure with a sufficiently large area of exposed pores to promote neo-vascularization as well as bone and tissue formation. The disclosed porous implant system can contain bioactive agents necessary for rapid tissue formation and keep ingrowth of unwanted tissue out of the implant surgical site. The implant can be reinforced with an additional, stronger polymer layer and / or may include an endoskeleton or exoskeleton for dimensional stability.

The invention belongs to the field of biological medical porous metal implant materials, and provides a method for preparing a stainless steel biological porous implant material by selective laser sintering, which comprises the following steps: preparing thermoplastic polymer coated 316L stainless steel powder by a film coating method, and forming the powder by a selective laser sintering technique, thereby quickly preparing the biological medical porous metal implant material. The film coating technique mainly comprises the following steps: melting the thermoplastic polymer, coating the stainless steel powder, pulverizing, and screening the coated stainless steel powder. The method is simple and feasible; the coated 316L stainless steel powder has the advantages of favorable sintering property and high adhesive strength; and the selective laser sintering technology is utilized to form the coated stainless steel powder, and the after-treatment of degreasing and secondary sintering is combined to prepare the porous metal implant material. The microstructure and mechanical properties of the stainless steel biological porous implant material can be flexibly controlled by adjusting the technological parameters of the selective laser sintering and after-treatment, thereby achieving the goal of matching with natural bones. The technology has significant application value in the field of preparation of biological medical porous metal implant materials.

The present invention is directed to porous implants and methods for the manufacture thereof which use powder molding techniques. Specifically, the methods include the steps of providing a suspensioncomprising a plurality of first particles of at least one organic polymer; a plurality of second particles of at least one metal-based material; and at least one solvent; wherein the first and secondparticles are substantially insoluble in the solvent; molding the suspension to form a green body comprising the first particles embedded in a matrix of compressed second particles; removing the firstparticles from the green body by thermally induced decomposition and / or evaporation; and sintering the green body to form the implant; wherein the step of removing the first particles is performed during sintering.

The implant includes an outer layer of ePTFE which exhibits extensibility normally not associated with ePTFE. The ePTFE is reduced in length by deforming the fibrils between the nodes while maintaining the nodes in a substantially flat configuration. Various implant configurations that can include the outer layer described are also disclosed.

An implant which includes a shaft made of a first material and having an exterior surface, and at least one thread made of a second material different from the first material, engaging the exterior surface, and extending outwardly from the exterior surface for engaging bone. After implantation of the implant, bone tissue may osseointegrate into the porous shaft to anchor the implant within the surrounding bone. The first material may be a porous metal and include tantalum while the second material is non-porous.

Porous biocompatible structures suitable for use as medical implants and methods for fabricating such structures are disclosed. The disclosed structures may be fabricated using rapid manufacturing techniques. The disclosed porous structures has a plurality of struts and nodes where no more than two struts intersect one another to form a node. Further, the nodes can be straight, curved, portions that are curved and / or straight. The struts and nodes can form cells which can be fused or sintered to at least one other cell to form a continuous reticulated structure for improved strength while providing the porosity needed for tissue and cell in-growth.

A dental implant can include a shaft defining a longitudinal axis and having an apical end, a coronal end, and an exterior surface. A portion of the exterior surface can include a porous material. The dental implant can include at least one thread, including a non-porous material, having an interior surface and a bone-engaging surface. The interior surface can engage and wind around the exterior surface of the shaft and the bone-engaging surface can extend outwardly from the exterior surface of the shaft. The shaft can include one or more channels configured to communicate a flowable material, stored within the shaft, to the exterior surface. Each channel can include an opening at the exterior surface to release the flowable material. At least one channel can extend between a cavity of the shaft and the exterior surface and can optionally be angled toward the apical end.