52results about How to "Maintain mechanical integrity" patented technology

The stent matrix of a stent incorporates joints that permit stress-free relative movement of first and second structural portions (10, 12) of the matrix as the facing surfaces of the joint between the structural portions slide relative to one another. The joints are formed in the thickness of an annular wall of the stent, and are created by a computer-controlled laser beam cutting procedure.

A rectangular plastic container having a shoulder region adapted for vacuum pressure absorption, a sidewall portion having a rigid support ledge and a tapered base structure having an octagonal shaped footprint. The shoulder region including vacuum panels being moveable to accommodate vacuum related forces generated within the container. The shoulder region, sidewall portion and base each having differing horizontal cross sectional shapes.

The present invention relates to a nano-calcium phosphates/collagen composite that mimics the natural bone, both in composition and microstructure, as well as porous bone substitute and tissue engineering scaffolds made by a complex of said composite and poly(lactic acid)(PLA) or poly(lactic acid-co-glycolic acid)(PLGA). The invention also relates to the use of said scaffold in treating bone defect and bone fracture.

The present invention relates to a novel composition for dental, orthopedic and drug delivery purpose. Specifically, it relates to composition comprising an admixture of a resorbable bone substitute and a crosslinkable prepolymer. It also relates to the composition formed by crosslinking the admixture.

A sidewall portion of a plastic container adapted for vacuum pressure absorption. The sidewall portion including generally rectangular shaped vacuum panels equidistantly spaced about the container. The vacuum panels having, at least in part, a convex shaped surface and a series of equidistantly spaced indents disposed therein. The vacuum panels being moveable to accommodate vacuum forces generated within the container thereby decreasing the volume of the container.

Constructs including a tubular biodegradable polyglycolic acid scaffold may be coated with extracellular matrix proteins and are substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, an arterial graft, a venous graft, a duct graft, a skin graft, or a urinary graft or conduit.

A composite membrane is provided having a first layer and a second layer, the first layer comprising an alginic acid or a salt of alginic acid, or a salt of a derivative of an alginic acid, and the second layer comprising a non-porous polymer with at least one hydrophilic functional group and adapted to provide mechanical support and reinforcement of the first layer. The second layer is selectively water permeable and can comprise water insoluble polymers such as chitosan, chitosan derivatives and cellulose derivatives. The second layer can also comprise water soluble polymers so long as such polymers are adequately crosslinked. Where the second layer comprises chitosan, each of the alginic acid or the salt of an alginic acid or the salt of a derivative of an alginic acid of the first layer and the chitosan of the second layer can be crosslinked separately by immersing in a formaldehyde solution. The thickness of the first layer is from about 0.5 microns to about 20 microns. The thickness of the second layer is from about 1.0 microns to about 40 microns. The ratio of the thickness of the first layer to the second layer is from about 1:1 to 1:5.

Endosseous dental implants and abutments for deterring tissue loss, such as loss of buccal bone, at the site of the implant/abutment. An exemplary implant may include longitudinally extending externally threaded and unthreaded regions each extending over only a circumferential portion of the external circumference of the implant. The implant may include an internal passage extending along the shaft having a frusto-conical region extending over only a circumferential portion of the internal passage. An exemplary abutment may include a distal connection end comprising a frusto-conical region thereat extending over only a circumferential portion of the external circumference of the connection end to provide a frusto-conical connection region and non-frusto-conical connection region.

The invention discloses silicon-based negative electrode slurry for lithium batteries, and a preparation method thereof. The slurry includes 40-100 parts of a silicon-based active substance, 0.1-10 parts of a conductive agent, 0.5-10 parts of a cross-linking type binder, and 20-200 parts of deionized water. The active substance in the slurry can be uniformly dispersed in a binder crosslinking network, so that the problems of pole piece pulverization and poor cycle performance caused by volume expansion of a silicon-based negative electrode material during a charging and discharging cyclic process can be effectively improved.

The present invention relates to polymeric materials including a glycosaminoglycan networked with a polyolefin-containing polymer. The present invention also relates to hydrogels containing the polymeric materials. The present invention further relates to methods of synthesizing the polymeric materials and hydrogels of the present invention.