142 results about "Controlled degradation" patented technology

Devices formed of or including biocompatible polyhydroxyalkanoates are provided with controlled degradation rates, preferably less than one year under physiological conditions. Preferred devices include sutures, suture fasteners, meniscus repair devices, rivets, tacks, staples, screws (including interference screws), bone plates and bone plating systems, surgical mesh, repair patches, slings, cardiovascular patches, orthopedic pins (including bone filling augmentation material), adhesion barriers, stents, guided tissue repair / regeneration devices, articular cartilage repair devices, nerve guides, tendon repair devices, atrial septal defect repair devices, pericardial patches, bulking and filling agents, vein valves, bone marrow scaffolds, meniscus regeneration devices, ligament and tendon grafts, ocular cell implants, spinal fusion cages, skin substitutes, dural substitutes, bone graft substitutes, bone dowels, wound dressings, and hemostats. The polyhydroxyalkanoates can contain additives, be formed of mixtures of monomers or include pendant groups or modifications in their backbones, or can be chemically modified, all to alter the degradation rates. The polyhydroxyalkanoate compositions also provide favorable mechanical properties, biocompatibility, and degradation times within desirable time frames under physiological conditions.

Stents fabricated from hydrolytically degradable polymers with accelerated degradation rates and methods of fabricating stents with accelerated degradation rates are disclosed.

The invention provides medical devices comprising high-strength alloys which degrade over time in the body of a human or animal, at controlled degradation rates, without generating emboli. In one embodiment the alloy is formed into a bone fixation device such as an anchor, screw, plate, support or rod. In another embodiment the alloy is formed into a tissue fastening device such as staple. In yet another embodiment, the alloy is formed into a dental implant or a stent.

Stents fabricated from hydrolytically degradable polymers with accelerated degradation rates and methods of fabricating stents with accelerated degradation rates are disclosed.

The invention provides an environment-friendly-type polypropylene (pp) aerated plastics and a process for preparation, and the aerated plastics utilizes plastic projectile body to be basis material, a third monomer is led in to be auxiliary crosslinking agent to crosslink and control degradation products, aerated plastics section products are made by processing graft copolymerization and cross-linking reaction to polypropylene, and closely welding, openly welding, tabletting, and foaming to shape with compatibilizer, filling material, nucleating agent, cross linking agent and inflating agent. The invention modifies the shortcomings that the traditional homopolymerized polypropylene can not get higher breakpoint extension force, high melt intensity and viscosity to foam and shape in the process of thermal foaming and shaping. The polypropylene (pp) aerated plastics products which are provided by the invention have excellent fire-resisting property and little heat distortion degree, and the softening point is between 100 DEG C and 130 DEG C. The invention can be used for long term in the temperature scope, and the application area is wide, wastes can be recycled, and can be automatically degraded, and the invention has no pollution to environment.