Abstract: The problem that a metal wire joined integrally to a hole formed in a proximal end face of a medical suture needle is susceptible to bending damage is reduced. A suture needle A has a blind hole 5 which is formed in a proximal end face 3, inserts the end of a wire 10 thereinto, and joins the wire 10 thereto by caulking, and a counterbore 6 which is formed on the proximal end face 3 side of the blind hole 5 and has a dimension D at least in the proximal end face 3 larger than a dimension d of the blind hole 5 and a depth L smaller than a depth of a caulked portion with respect to the blind hole 5. A suture needle with wire inserts the end of the wire 10 into the blind hole 5 to caulk the outer circumference of the suture needle corresponding to the blind hole 5, thereby integrally joins the wire 10 thereto.

Abstract: A stent including a plurality of loop stents connected by struts so that it bends uniformly as a whole. A stent A including a plurality of loop stents 2 connected by a plurality of struts 3, the loop stents 2 each formed of a stent main wire 1 folded into a zigzag shape and joined at its ends, wherein the bending strength of each strut 3 is larger than the bending strength of the stent main wire 1.

Abstract: Width of a space for receiving staples of a magazine is greater than length of the staples and is less than the sum of the length of the staples to ½ of the diameter of the staples, preferably ? thereof or less. The magazine is formed as half split bodies on either side of a rail along the length thereof, a convex positioning part is provided on one of the half split bodies, a concavity for engaging with the positioning convexity is formed on the other half split body, support holes for engaging with positioning parts are formed in the half split bodies, a locking part for holding engagement with the other half split body is provided on said one of the half split bodies, and a to-be-locked part for engaging with the locking part is formed on the other half split body.

Abstract: A bending method for a straight needle-shaped material which has a thickness decreased from a body portion to a needle point that is inserted between a roller having a processing surface and a belt and is wound around the roller via a separating member. Then the roller is rotated and the belt is wound, thereby pressing and curving the straight needle-shaped material onto the processing surface. In a suture needle, a portion of a tip side including the needle point is formed as a non-restricted portion which is not restricted by the processing surface of the roller, and a portion except for the non-restricted portion is formed as a curved portion which is bent along the processing surface of the roller.

Abstract: [Problems] To ensure the sharpness of a stripping knife whereby a part of a living tissue is incised and stripped while preventing a cut along the thickness direction. [Means for Solving Problems] A stripping knife (A) having a plate-shaped blade (3) having an edge (1) around the periphery, a shank (5) connected to the blade (3), and a handle (7) holding the shank (5) in the integrated state, wherein the blade (3) is composed of the edge (1) formed at the front end and a guide face (2) which is formed between the edge (1) and the front face (3b) of the connected plate constituting the blade (3) and brought into contact with the surface (13) of the remaining tissue.

Abstract: A dental rotary drive cutting tool, which can limit breaking location to the shank side, and increase life span until breakage, is provided. A peeso reamer (10) as the dental rotary drive cutting tool according to the present invention includes a cutting portion (11) formed on the tip side, a shank (12) formed in a base, and a neck part (13) formed between the cutting portion (11) and the shank (12), wherein the neck part (13) includes a tapered portion (13a), which is wider on the tip side and narrower on the base side, and a straight portion (13b), which has a constant thickness with the same diameter as that of the end of the tapered portion on the base side. While it breaks at the narrowest portion of the tapered portion, this portion is a straight portion, and thus increase in life span is possible.

Abstract: A crimping die including a fixed die and a moving die which moves away from or toward the fixed die, and a thread guide arranged closely to the edge of the stop hole formed in the proximal end face of an eyeless needle held by the crimping die and having a surface for guiding the suture thread to the stop hole. The thread guide is arranged such that an external force does not act on the suture thread on the outside of the stop hole formed in the eyeless needle as a crimping operation progresses when the proximal end face of the eyeless needle is crimped by the crimping die, or arranged to move in the direction in which an external force does not act.

Abstract: A suturing needle, comprising needle tip portion (1) having needle tip (1a), tapered portion (2) continuing to needle tip portion (1), trunk portion (3) continuing to tapered portion (2), and thread attaching portion (4) continuing to trunk portion (3); needle tip portion (1) has circular section continuing to sharp needle tip (1a), angular section continuing to sharp needle tip (1a), circular section continuing to blunt needle tip (1a) or angular section continuing to blunt needle tip (1a): wherein trunk portion (3) has the relations R1?R2?R3, when peak (5) or joint portion between the two flat faces has diameter R1, crest of ridges has a roundness of R2, and a valley (7) has roundness R3; and valley (7) is formed to correspond partially to peak (5), and the thickness becomes continuously larger from tapered portion (2) to trunk portion (3).

Abstract: [Problem] To provide a medical cutting tool with low impalement resistance. [Solution] The edged medical cutting tool comprising a knife, trocar or cutting suture needle has a sharp edge (1) for incising living tissue and a flat part (2) that configures the edge, and the color of the portion of the flat part (2a) along the edge (1) differs from the color of the rest of the flat part (2b). The difference in color results from a difference in the thickness of an oxide film. Another edged medical cutting tool is configured of austenite stainless steel and has a sharp edge (1) for incising living tissue and a flat part (2) that configures the edge. The chrome content of the portion of the flat part (2a) along the edge is higher than the chrome content of the rest of the flat part (2b).

Abstract: [Problem] Because the knife edge of medical knives such as straight knives manufactured with austenite stainless steel is thin and sharp, there is the problem that the knife edge bends too easily when making incisions in the cornea, sclera, etc. during ophthalmologic surgery. The invention provides a medical knife capable of increasing the strength of the thin, sharp knife edge and preventing the reduction of sharpness. [Solution] This medical knife has a flat cutting part and an inclined surface formed along the border of said cutting part. By electrolytic polishing or chemical polishing of the inclined surface, a convexly curved cutting edge is formed on at least the edge of the inclined surface of the knife. The knife edge has a rounded configuration. The knife edge being rounded increases the thickness of the knife edge, increases the strength thereof and hinders bending.

Abstract: A bending method and a bending apparatus are provided for bending a medical suturing needle into different curved shapes by using one bending roller. The bending apparatus comprises a reciprocally rotatable bending roller, and a belt having such a flexibility as can be wound on the outer circumference of the bending roller. The bending method curves a medical suturing needle by sandwiching and constricting a material for the medical suturing needle between the bending roller and the belt and by rotating the bending roller reciprocally in the winding direction and in the rewinding direction. In the bending method, the curved shape of the material is changed by changing the winding angle of the belt to be wound on the outer circumference of the bending top thereby to change the area for constricting the material.

Abstract: A stent has a stent main wire. The strut is disposed adjacent to the stent main wire and a junction pipe disposed around the stent main wire and strut so as to affix the stent main wire to the strut. A locking part is formed at an end of the strut to prevent the strut from sliding out of the junction pipe. The locking part comprises a folded back portion, wherein a distal most end of the folded back portion abuts with a distal most end of the junction pipe, a swelling portion, wherein a distal most end of the swelling portion is abutting a distal most end of the junction pipe, or a bent portion, wherein a distal most end of the bent portion is abutting with a distal most end of the junction pipe.

Abstract: A stainless steel bur is provided which can cut minute depressions and even healthy dentin when necessary, allowing a technician to detect when cutting the healthy dentin. A handle connected to a hand piece on the base side, a working section to which a cutting blade for cutting teeth is attached to the tip, and the working section and the handle are connected to a tapered intermediate section. This steel bur is formed into a fiber structure by hardening austenitic stainless steel. Since the tapered part bends and generates vibrations when the working section is rotated to cut healthy dentin, it can be understood that the healthy dentin is being cut, and excessive cutting may be prevented. Alternatively, excessive cutting may be prevented by processing from the maximum diameter of the working section to the tip thereof through etching to round cutting blade edge and make a blunt edge.

Abstract: There is provided a medical stapler allowing an easy and secure connection of a magazine and a housing during assembly. A medical stapler 10 according to the present invention includes a magazine 2 that comprises therewithin staples 4, a rail 5 for aligning the staples 4, and a mechanism for punching out staples; a lever 3 for actuating the mechanism for punching out the staples; and a housing 1 for enclosing and connecting the magazine and the lever.

Abstract: There is provided a magazine capable of preventing jamming of staples in a medical stapler, and reducing manufacturing cost. Width of a space for receiving staples 3 of a magazine 40 is greater than length of the staples 3 and is less than the value resulting from adding length of the staples 3 to ½ of the diameter of the staples, preferably ? thereof or less. In addition to the above configuration, the magazine 40 is formed as half split bodies 41 and 42 on either side of a rail along the length thereof, a convex positioning part 41a is provided on one of the half split bodies, a concavity 42a for engaging with the positioning convexity is formed on the other half split body, support holes 41c and 42c for engaging with positioning parts are formed in the half split bodies, a locking part 41b for holding engagement with the other half split body is provided on said one of the half split bodies, and a to-be-locked part 42b for engaging with the locking part is formed on the other half split body.

Abstract: A surgical cutlery and a manufacturing method thereof, which prevent over-etching and reduce pierce resistance, are provided. The manufacturing method of the surgical cutlery made of a round bar material 15 of austenitic stainless steel with a fibrous structure includes the steps of: forming a working portion 16 of the cutlery from the round bar material 15 for piercing or cutting a living tissue, wherein the fibrous structure runs along an axis a; forming a wheel mark 24 on the working portion of the surgical cutlery; and etching the working portion 23 after etching. The etching is performed to the limit that allows creation of a plurality of craters on the working portion, but does not allow creation of grooves along the fibrous structure. Afterwards, application of silicone is performed on the resulting surface.

Abstract: A work 10 made of a hard wire rod of austenitic stainless steel is pressed at a rolling reduction of 60% or greater, into a paddle-shaped end 10b, and then subjected to work hardening, making the hardness of the end 10b 550 Hv or greater. Afterwards, the paddle-shaped end 10b is cut through machining, forming a main body 10c of a medical knife and cutting blades 10d. As a result, a medical knife, which is easily fabricated, is corrosion resistant, has sufficient hardness and sharpness, high toughness preventing cracks, can be provided.

Abstract: Manufacturing a working portion and a joined portion through the same processing method provides a dental root canal treatment instrument allowing a simplified manufacturing process. A metal, rod-like main frame 11 includes a working portion 11a having a tapered point to be inserted in a root canal during use, and a joined portion 11b buried within a handle 12, continuing to the end on the wide side of the working portion. The working portion and the joined portion are formed through the same processing method. Injection of a synthetic resin to cover the joined portion 11b prepares the handle 12, thereby forming a dental root canal treatment instrument 10. The joined portion has at least one concave portion or convex portion in order to reinforce the joint with the handle.

Abstract: A medical knife of the invention having a cutting edge formed along the outer periphery of a blade portion includes a shank; and a blade portion formed continuously from the shank, the blade portion includes a tip portion including a tip whose projected plane shape is formed at an extreme end portion; a maximum width portion having a largest width: a side surface portion formed between the tip portion and the maximum width portion; a cutting edge; a first slanting surface formed along the cutting edge; and a second slanting surface formed along the first slanting surface, wherein the first slanting surface constituting the tip portion has a width larger than that of the first slanting surface constituting the side surface.