6 results about "Biodegradable implants" patented technology

Injectable depot compositions, consisting of a biocompatible polymer, which is a polymer or a copolymer based on lactic acid and / or lactic acid together with glycolic acid with a ratio of lactic acid to glycolic acid monomers in a range of 48:52 to 100:0, a water-miscible solvent with a dipole moment of about 3.7-4.5 D and a dielectric constant between 30 and 50 and a drug, were deemed suitable for the in situ formation of biodegradable implants that can induce therapeutic levels of the drug in the plasma from the first day and for at least days.

The invention discloses an amorphous nano-material on a magnesium-based metal surface and a preparation process of the amorphous nano-material, and belongs to the technical field of metal surface treatment. Current-carrying friction is carried out on the magnesium-based metal surface, and directional formation of the amorphous layer on the magnesium-based metal surface is achieved by regulating and controlling the load, the current and the friction time in the current-carrying friction process. The method breaks through the harsh requirement of traditional amorphous preparation for the cooling rate, does not need to change magnesium matrix metal components, is simple in process and low in cost, is suitable for the high-end fields of aerospace lightweight parts, electronic packaging heat dissipation devices, biodegradable implants and the like, and has remarkable industrial application value and commercial production prospects.

The present invention relates to the development of a composite material consisting of two biopolymers, Silane and Chitosan, reinforced by graphene oxide nanosheets. This composite is applied as a coating to magnesium alloy surfaces using the spin-coating technique. The synthesized material is distinguished by optimized mechanical properties, excellent biocompatibility, and delayed and controlled biodegradation, meeting the requirements of biodegradable implants in the biomedical field.

This invention relates to a biodegradable Zn-Cu-Ca alloy for biomedical use, its preparation method, and its applications. It pertains to the field of biomedical materials, particularly zinc alloys. The Zn-Cu-Ca alloy comprises Zn, Cu, and Ca, with Cu content ranging from 0.05 to 3.0 wt%, Ca content from 0.05 to 2.0 wt%, and the remainder being Zn. This invention successfully prepares the Zn-Cu-Ca alloy using alloy ingots and a remelting method. By rationally designing the alloy composition, this invention significantly improves the alloy's mechanical properties and biodegradability. The addition of copper enhances the alloy's strength, while the addition of calcium regulates the degradation rate and improves biocompatibility. This alloy material is suitable for the biomedical field, especially as a biodegradable implant material, and has broad application prospects.

This application provides an adaptive biodegradable implant shaping patch for breast reconstruction, belonging to the fields of medical biodegradable materials and breast reconstruction medical devices. It includes an arc-shaped cover and a base cover that unfold into a porous, sheet-like integrated structure. The arc-shaped cover contains a radially distributed array of flaps around a central reference point and an elastic buffer zone located between the central reference point and the root of the flap array. The flap array bends and encloses to form a hemispherical covering space that conforms to the outer curved surface of the implant. The base cover is a disc-shaped structure that adapts to and covers the lower end face of the implant, and connects to the extended ends of the flaps to achieve conformal coverage. This invention's patch has a reasonable structure, good fit to the implant, can simulate the physiological and mechanical characteristics of the breast, is easy to operate, and provides reliable fixation. It can adapt to different implant sizes and can reduce postoperative complications, meeting the personalized breast reconstruction needs of different patients, and has high clinical application value.

The invention discloses a surface treatment method for a biodegradable zinc-magnesium-silver-titanium alloy and a zinc-magnesium-silver-titanium alloy material with a zinc phosphate Hopeite conversion film. The conversion solution is prepared from the phosphoric acid solution and the nitrate solution, then the zinc phosphate Hopeite conversion film is prepared on the surface of the zinc-magnesium-silver-titanium alloy through a chemical conversion method, Zn3 (PO4) 2.4 H2O of a uniform and compact structure is successfully formed on the surface of the zinc-magnesium-silver-titanium alloy, namely, the zinc phosphate Hopeite conversion film, and the zinc phosphate Hopeite conversion film has excellent adhesive force and stability. The material disclosed by the invention solves the problems of poor surface biocompatibility and poor degradability of a traditional metal material. Through formation of a zinc phosphate Hopeite conversion film, the biocompatibility of the zinc-magnesium-silver-titanium alloy is improved, cell attachment and growth can be promoted when the zinc-magnesium-silver-titanium alloy is implanted into a human body, the corrosion resistance and biodegradability of the zinc-magnesium-silver-titanium alloy are remarkably improved, and the zinc-magnesium-silver-titanium alloy is suitable for the field of biological medicine of biodegradable implants and has wide application prospects.