Abstract: The present disclosure relates to a biodegradable metal alloy with multiple properties, containing: 0.05-0.15 wt % of calcium; a metal element X having a HCP structure, of a composition not forming a precipitated phase when mixed with magnesium; and magnesium as the remainder.

Abstract: The present disclosure relates to a biodegradable metal alloy with multiple properties, containing: 0.05-0.15 wt % of calcium; a metal element X having a HCP structure, of a composition not forming a precipitated phase when mixed with magnesium; and magnesium as the remainder.

Abstract: This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0<(ii)/(i)?5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

Abstract: The present invention relates to a magnesium alloy having controlled corrosion resistance properties, which comprises magnesium (Mg) and an alloying element and includes a magnesium phase and a phase composed of magnesium and the alloying element, wherein the difference in electrical potential between the magnesium phase and the phase composed of magnesium and the alloying element is greater than 0 V but not greater than 0.2 V.

Abstract: This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0<(ii)/(i)?5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

Abstract: The present invention relates to a magnesium alloy having controlled corrosion resistance properties, which comprises magnesium (Mg) and an alloying element and includes a magnesium phase and a phase composed of magnesium and the alloying element, wherein the difference in electrical potential between the magnesium phase and the phase composed of magnesium and the alloying element is greater than 0 V but not greater than 0.2 V.

Abstract: This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0</(i)?5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

Abstract: The present invention provides an implant, which is used to fix an artificial joint in bone, including a biodegradable magnesium alloy.

Abstract: The present invention relates to a magnesium alloy having controlled corrosion resistance properties, which comprises magnesium (Mg) and an alloying element and includes a magnesium phase and a phase composed of magnesium and the alloying element, wherein the difference in electrical potential between the magnesium phase and the phase composed of magnesium and the alloying element is greater than 0 V but not greater than 0.2 V.

Abstract: Disclosed is a direction controllable electrode body, comprising a flexible body which comprises: a first electrode, comprising a body, a first cap joined to one end of the body, and a first electrode line connected to an other end of the body; an insulator in partial contact with the body and the first cap of the first electrode, said insulator functioning to insulate the first electrode from the second electrode; a second electrode, comprising a first ring in contact with the insulator, and a second electrode line connected to one end of the first ring; and a direction controller, comprising a first direction controlling wire communicating with the first electrode or the second electrode to control direction of the electrode body. Also, a guide pipe is provided for leading the electrode body to a target tissue.

Abstract: The present invention relates to treating an inter-vertebral disc, in particular, to a method of treating an inter-vertebral disc by effectively ablating a tissue within a disc, in which herniation of nucleus pulposus occurs. A method of treating an inter-vertebral disc according to one embodiment of the present invention relates to treatment using a guidable electrode to be inserted into an inter-vertebral disc of a patient, in which the treatment comprises a step of inserting a front end of a needle unit from the outside of annulus fibrosus into the inside of the annulus fibrosus, a step of inserting a guidable electrode through the rear of the needle unit, a step of adjusting position of the end of the electrode to be adjacent to a target tissue within the annulus fibrosus, and a step of ablating a tissue within nucleus pulposus by applying electrical energy to the electrode.

Abstract: This invention relates to a biodegradable implant including magnesium, wherein the magnesium contains, as impurities, (i) manganese (Mn); and (ii) one selected from the group consisting of iron (Fe), nickel (Ni) and mixtures of iron (Fe) and nickel (Ni), wherein the impurities satisfy the following condition: 0</(i)?5, and an amount of the impurities is 1 part by weight or less but exceeding 0 parts by weight based on 100 parts by weight of the magnesium, and to a method of manufacturing the same.

Abstract: The present invention provides a composite implant comprising pores of a porous structure filled with a biodegradable magnesium-based alloy. Further, the present invention provides a composite implant which filles pores of the porous structure prepared by a metal, a ceramic or a polymer with a biodegradable magnesium-based alloy. Mechanical properties of the composite implant of the present invention are improved because a magnesium-based alloy filled in its pores increases the strength of a porous structure comprised of a metal, a ceramic or a polymer. Further, it can be expected that the magnesium-based alloy filled in the porous structure is decomposed in a living body, thus increasing bone formation rate. Accordingly bone tissue can be rapidly formed because the composite implant of the present invention has high strength and excellent interfacial force between the composite implant and bone tissue, compared to conventional porous materials.

Abstract: The present invention provides an implant consisting of a biodegradable magnesium-based alloy or partially applied with the magnesium-based alloy, and a method for manufacturing the same. The implant according to the present invention is biodegradable, in which its biodegradation rate can be easily controlled, and the implant has excellent strength and interfacial strength to an osseous tissue.

Abstract: Disclosed is a bone fixation apparatus. This device comprises a bone screw having a head; a cap member placed on an upper part of the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively accommodated and held, and a U-shaped channel through which a support bar extends; and a compression member threadedly coupled into the receiver member to downwardly bias the support bar. A multitude of stepped portions are formed at a lower end and inner surface of the receiver member to be brought into linear contact with an outer surface of a lower part of the head so that the supporting force for the head of the bone screw is increased.

Abstract: A cervical spine fixator and a screwdriver used therefore is disclosed wherein the fixator comprises plates (12, 212) for being adjoined to a cervical spine fixation region and a plurality of screws (14, 214). The plurality of screws are fixedly inserted into a patient's cervical spine and simultaneously coupled to the plates, wherein an adjacent region coupled with the screws in the plates is fixed with screw head fixture members (16, 216) having a protruder, which is deformed under the effect of pressure by a screw head when the screws are inserted and returns to their position of origin when the screw head is completely accommodated into the plates to be hitched by the screw head. The plates are formed thereon with receiving grooves (22, 222) for accommodating the screw head and the screw head fixture member. The receiving grooves are formed with openings into which the screws are inserted and a recess into which the screw head is received.

Abstract: Disclosed is a bone fixation apparatus. This device comprises a bone screw having a head; a cap member placed on an upper part of the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively accommodated and held, and a U-shaped channel through which a support bar extends; and a compression member threadedly coupled into the receiver member to downwardly bias the support bar. A multitude of stepped portions are formed at a lower end and inner surface of the receiver member to be brought into linear contact with an outer surface of a lower part of the head so that the supporting force for the head of the bone screw is increased.

Abstract: A prosthetic cage for spine adapted to be implanted in an intervertebral disc space between two vertebral bodies in a spine and to accommodate fusion of the disc space, said cage being a tubular body with an internal aperture, an external surface of which having a plurality of wall apertures each perpendicular to the longitudinal axis thereof and communicating with the internal aperture, and dual convex screw threads extended therefrom, such that the cage of the present invention has an advantage that the stability of fixation between the cage and the vertebral body can be achieved by simple variation of its shape.

Abstract: A frame fixator and operation system thereof, the fixator comprising an upper end ring and a lower end ring, and a plurality of length adjustment means coupled at both ends thereof to the upper end ring and the lower end ring, wherein the length adjustment means include an actuator, a moving member movable by the actuator and a digital indicator for indicating a length of the length adjustment means changeable to the movement of the moving member, the fixator and peration system for enabling to automatically adjust a distraction rate and distraction frequency of fracture during bone deformity correction and lengthening and to easily adjust the length by digitally indicating changed value of length according to manual or automatic manipulation.

Abstract: A prosthetic cage for spine adapted to be implanted in an intervertebral disc space between two vertebral bodies in a spine and to accommodate fusion of the disc space, said cage being a tubular body with an internal aperture, an external surface of which having a plurality of wall apertures each perpendicular to the longitudinal axis thereof and communicating with the internal aperture, and dual convex screw threads extended therefrom, such that the cage of the present invention has an advantage that the stability of fixation between the cage and the vertebral body can be achieved by simple variation of its shape