摘要:
Disclosed is a method for preparing a surface coating with a reduced degradation rate of a biodegradable magnesium alloy vascular stent, comprising firstly grafting a silane coupling agent to the surface of a magnesium ally by dip coating, heat curing, and forming a silane coupling agent coating on the surface of the magnesium alloy; and then coating a polymer on the surface of the silane coupling agent coating by spin coating, and drying under vacuum to form a polymer coating. The polymer coating on the surface of the magnesium alloy and pretreated by a silane coupling agent can enhance the bonding force with the surface of the magnesium alloy vascular stent to suppress excessive degradation of the magnesium alloy matrix, and improve the biocompatibility of the vascular stent.
摘要:
The invention relates to a rod-shaped body comprising a central portion and a peripheral portion, wherein the central portion is arranged in the center of the rod-shaped body and is surrounded by the peripheral portion. Both the central portion and the peripheral portion substantially extend across the entire length of the rod-shaped body. The central portion has at least one non-metallic fiber bundle that is embedded in a non-ferromagnetic matrix material. The matrix material is doped with marker particles. The peripheral portion has at least one undoped, non-ferromagnetic matrix material. The diameter of the central portion is less than or equal to 0.2 mm, preferably less than or equal to 0.15 mm, and even more preferably, is less than or equal to 0.1 mm, and in particular less than or equal to 0.08 mm.
摘要:
The present invention provides a method for preparing an implant including preparing a mixed etching composition including hydrogen peroxide and a water-soluble carbonate compound and oxidatively etching an implant made of titanium or a titanium alloy by immersing the same in the etching composition; a titanium or titanium alloy implant prepared by oxidative etching with a mixed etching composition including hydrogen peroxide and a water-soluble carbonate compound; and a composition for treating surface of an implant containing hydrogen peroxide and a water-soluble carbonate compound. Further, the present invention relates to a titanium or titanium alloy implant which is prepared by oxidative etching with a mixed etching composition including hydrogen peroxide and a basic solution and on which surface bumps having continuous or discontinuous line-shaped open channel structures in nanoscale are irregularly formed, and a preparation method thereof. The surface of the titanium alloys treated with the mixed etching composition including hydrogen peroxide and a carbonate compound or the etching composition containing hydrogen peroxide and a basic solution of the present invention includes micrometer-sized bumps and channel-shaped nanometer-sized bumps, and thus has an increased surface area, and can not only improve wettability, but also effectively promote cell proliferation and osteocyte differentiation. In addition, the composition includes no chemical compounds such as a strong acid, etc. and is thus environmentally friendly, and such compounds can be prevented from remaining on the surface, which can improve biocompatibility, and therefore, the composition can be useful for implant surface treatment.
摘要:
Orthopedic fastener devices for fixation of fractured bones are disclosed. The orthopedic fastener device is in the form of an orthopedic fastener having an IM nail coated on its external surface with a bioabsorbable or biodegradable hydrogel. Also disclosed are hydrogel coated orthopedic fastener devices in the form of a K-wire or bone screw, a method for stabilizing a fractured long bone fracture by inserting an orthopedic fastener into the medullary canal of the bone and a kit for fastener implantation.
摘要:
The present invention relates to an ocular device for regulating intraocular fluid pressure comprising or consisting of a tubular body wherein the inner surface of the tubular body or the inner and outer surface is/are coated with covalently immobilized hyaluronic acid (HA).
摘要:
The present invention provides an orthopaedic implant including a base device having a device surface and a fixation material attached to at least one portion of the device surface. The fixation material is configured to provide a minimally sufficient adhesive force to resist natural pull out caused by forces acting on the base device after implantation and bone growth. Also provided is a method of manufacturing an orthopaedic implant. A base device with a device surface is provided and a minimally sufficient adhesive force, that can resist natural pull out caused by forces acting on the base device after implantation and bone growth, is determined. A proper amount of fixation material sufficient to provide an adhesive force equal to the minimally sufficient adhesive force is determined and fixation material is applied to the device. When the proper amount of fixation material is applied to the device surface, application is stopped.
摘要:
Disclosed herein are bioresorbable stents which elute nitric oxide (NO). The stent is comprised of three main key design elements: a bioresorbable scaffold, a bioresorbable polymeric coating layer(s), and NO-releasing nanoparticles incorporated in the bioresorbable polymeric coating layer, and optionally also in the scaffold. The NO-releasing nanoparticles are made of nontoxic biocompatible and biodegradable materials; for example a chitosan polymer and optionally a sugar.
摘要:
A biodegradable pure magnesium bone nail comprises a rod-shaped pure magnesium screw bone nail (1). From the bottom of a crossed groove (4), for turning a screw, of a tip of the screw bone nail (1), an axial hole (2) whose length is 2/3 of that of a rod of the screw bone nail is manufactured. In the length of the axial hole (2) of the screw bone nail (1), several radial holes (3) are uniformly manufactured from the bottom of thread into the axial hole (2) at 90 degrees.