Medical lifting line bent in zigzag shape

Abstract

The present invention relates to a medical lifting pull wire bent in a zigzag shape, and the medical lifting pull wire is characterized by comprising: a corrugated body formed by continuously arranging a valley part and a ridge part in a zigzag shape along the length direction, the valley part and the ridge part having a height difference; and protrusions (cog) which are formed so as to alternately protrude in mutually different directions on the inner surfaces of the tip portions of the valley portions and the ridge portions, and which protrude higher than the adjacent valley portions or ridge portions. According to the medical lifting line bent in the zigzag shape, the contact area with the biological tissue is increased through the zigzag-shaped corrugated body, flexibility is ensured, and meanwhile fluidity and fixity can be enhanced through the protrusions which do not cause excessive bending of the corrugated body and can ensure fixing force.

Description

Technical Field

[0001] The present invention relates to a medical lifting thread bent in a zigzag shape. More specifically, the present invention relates to a lifting thread that can enhance both fluidity and fixing force, having a body that is integrally zigzag-shaped by continuously repeating valleys and ridges with a height difference, and protrusions that adopt a structure that can ensure a fixing force without causing excessive bending of the body. Background Art

[0002] Medical lifting threads formed with protrusions that are inserted into the skin, lift the skin, and then hang on the subcutaneous tissue to pull the skin are widely used by medical practitioners represented by doctors for cosmetic purposes such as restoring facial sagging or nasolabial folds in a procedure called thread lifting.

[0003] Medical lifting threads are generally made of dissolvable threads such as polydioxanone (PDO), poly-L-lactic acid (PLLA), and polycaprolactone (PCL). Based on the dissolvable characteristics of these threads, re-treatment can be received at regular intervals.

[0004] Such lifting threads initially started with a simple linear body structure. Later, in order to ensure a fixing force in skin tissue, they gradually evolved into structures with various protrusions added, such as barbed, hook-shaped, conical, and screw-shaped protrusions.

[0005] In particular, a pulling wire having a groove structure in and around the protrusion and capable of being more firmly fixed to biological tissue has been developed. For example, Korean Patent No. 2388216 proposes the following structure: A medical pulling wire for enhancing fixing force, comprising: a main body; a convex tooth, which extends obliquely from the surface of the main body along the rear end direction of the main body, including a first inclined portion extending obliquely from a first point of the main body along the rear end direction of the main body, and a second inclined portion extending from the end of the first inclined portion to a second point of the main body spaced a predetermined distance from the first point in the rear end direction of the main body; a groove, which includes a first recess extending inwardly of the main body on the inner circumferential surface on the same line as the second inclined portion, and a second recess extending from the end of the first recess to a third point of the main body spaced a predetermined distance from the second point in the rear end direction of the main body, and a plurality of the convex teeth and grooves are formed at intervals on one side of the main body. The first inclined portion includes a first inclined portion extending obliquely from a first point of the main body along the rear end direction of the main body, and a second inclined portion that bends from the end of the first inclined portion and extends parallel to the extending direction of the main body to connect with the second inclined portion. The second recess includes a first recess extending a predetermined length from the end of the first recess along the rear end direction of the main body, and a second recess that bends from the end of the first recess and extends to the third point. A chamfered portion with a rounded corner chamfer is formed at the boundary between the first recess and the first recess, and it is disclosed that the fixing force in biological tissue can be enhanced.

[0006] It can be said that the structure is characterized in that a groove is formed around the inclined convex tooth, and the fixing force on biological tissue is enhanced through the linkage structure of the convex tooth and the groove. However, since the main body is a linear structure, there is a problem that there are inevitably limitations in ensuring the fluidity of the main body itself. And, the convexity tends to be inclined in a specific direction, so there is also a disadvantage of being vulnerable to compression of biological tissue acting in other directions than this direction.

[0007] Therefore, it is necessary to develop a pulling wire with a novel and advanced structure, which can ensure fluidity from the main body level that has a greater impact on the overall volume and diameter of the pulling wire than the convex tooth or protrusion to make up for the problem of being easily broken, and at the same time can enhance the fixing force. Summary of the Invention

[0008] Technical Problem

[0009] The present invention is conceived to overcome the above technical problems, and the main object is to provide a pulling wire, which includes a corrugated body having a zigzag shape with valleys and ridges of different heights repeating continuously, and protrusions that can ensure the fixing force without causing excessive bending of the corrugated body, so as to enhance fluidity and fixity simultaneously.

[0010] Another object of the present invention is to provide a detailed structure that can simultaneously achieve the structural stability and strong fixing property of the linkage structure between the corrugated body and the protrusions.

[0011] Yet another object of the present invention is to specify the gap between the corrugated body and the protrusions, so as to maximize the synergistic effect of the inherent functions of the corrugated body and the protrusions.

[0012] A further object of the present invention is to ensure the stability of the protrusions through the specialized structure of the protrusions linked with the slits.

[0013] Technical Solution

[0014] To achieve the above object, the present invention provides a medical pulling wire bent in a zigzag shape, which is characterized in that it includes: a corrugated body, in which valleys and ridges with a height difference are continuously arranged in a zigzag shape along the length direction; and protrusions, which are alternately protruded in different directions on the inner sides of the tip parts of the valleys and ridges respectively, and protrude higher than the adjacent valleys or ridges.

[0015] In addition, the present invention is characterized in that the valleys and ridges are provided with flat parts whose tip parts are flattened by a specified length, and the protrusions are formed to protrude from the flat parts.

[0016] Moreover, the present invention is characterized in that the corrugated body includes inclined parts, which are inclined in a converging direction at the ends of the two valleys adjacent to both sides of the ridge, and have an inclination angle of 5 to 15 degrees based on the flat part of the ridge, and cracks are generated between the inclined parts and the protrusions.

[0017] Effects of the Invention

[0018] According to the medical pulling wire bent in a zigzag shape of the present invention, the following effects can be achieved:

[0019] 1) While increasing the contact area with biological tissues and ensuring flexibility through the corrugated body with a zigzag shape, the fluidity and fixity can be enhanced simultaneously through the protrusions that can ensure the fixing force without causing excessive bending of the corrugated body;

[0020] 2) Due to the improved flat and inclined parts of the sharp parts of the valley and ridge, the stability of the corrugated body and the protrusion structure and the fixation to the biological tissue are further improved;

[0021] 3) Through the gaps between the corrugated body and the protrusions, i.e. the cracks and the narrow slits that are further sunk, not only can the overall stability of the lifting line, the traction force and fixation of the biological tissue be strongly exerted; and

[0022] 4) The improved structure of the protrusion is derived through the specialized structure of the slit, thereby achieving the effect of improving the standing stability and durability of the protrusion and the fixing force with the biological tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view showing a basic embodiment of the lifting thread of the present invention.

[0024] Figure 2 It is a cross-sectional view showing an embodiment in which projections are formed protrudingly on the flat portions of the valleys and ridges.

[0025] Figure 3 is a cross-sectional view showing a structure in which an inclined portion is formed in a corrugated body.

[0026] Figure 4 is a cross-sectional view showing a structure in which a slit is formed in a crack.

[0027] Figure 5 It is a cross-sectional view showing the structure of a protrusion formed in conjunction with a crack slit.

[0028] Figure 6 yes Figure 5 An enlarged cross-sectional view of part A.

[0029] Figure 7 yes Figure 5 An enlarged cross-sectional view of part B.

[0030] Figure 8 It is shown Figure 5 A cross-sectional view of a deformed embodiment of a protrusion. DETAILED DESCRIPTION

[0031] The best embodiment of the present invention is as follows: it comprises: a corrugated body, which is composed of valleys and ridges with height differences and is continuously arranged in a zigzag shape along the length direction; and a cog, which is formed by alternately protruding in different directions from the inner side surface of the tip of each of the valley and the ridge, and protrudes higher than the adjacent valley or ridge.

[0032] Modes for carrying out the invention

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The drawings are not drawn to scale, and the same reference numerals in each figure denote the same components.

[0034] Figure 1 It is a cross-sectional view showing a basic embodiment of the pull line of the present invention.

[0035] First of all, like the well-known pull line with convex teeth, the pull line of the present invention is basically composed of a body and a protrusion.

[0036] The body is also the same as the well-known medical thread and is made of a material that can be dissolved in the living body. For example, it is made of polydioxanone (PDO), or further, made of poly-L-lactic acid (PLLA) or polycaprolactone (PCL), which is known as a substance that promotes collagen formation, or at least includes these components.

[0037] In particular, different from the well-known body, the body of the present invention is based on a zigzag shape. In the present invention, such a body with a zigzag shape is named a corrugated body 100.

[0038] The corrugated body 100 of the present invention adopts a structure in which valleys (valley portions) 120 and ridges (ridge portions) 110 with a height difference are continuously arranged in a zigzag along the length direction of the corrugated body 100.

[0039] Of course, the corrugated body 100 introduced into the living body does not have a vertical arrangement structure with a height difference as Figure 1 shown. However, for the convenience of explanation, taking Figure 1 shown as a reference, the higher side part is named the ridge portion 110, and the lower side part is named the valley portion 120.

[0040] As Figure 1 shown in (a) and (b), the ridge portion 110 and the valley portion 120 can be formed in a state where they have sharp tip portions and maintain a zigzag shape. However, as will be described later, the ridge portion 110 and the valley portion 120 may not have sharp corners, but may be subjected to a soft chamfering process, or the tip portions of each ridge portion 110 and valley portion 120 may be processed into flat portions 111 and 121 with a specified length, which will be described later.

[0041] Compared with a known straight-shaped body that extends linearly based on the length connected in a straight line from the starting end to the ending end, such a corrugated body 100 can increase the surface area in contact within a living body due to its zigzag shape. Correspondingly, it can ensure enhanced traction and fixing force within a living body.

[0042] Moreover, resilience and rebound force will naturally generate within the biological tissue where the pulling wire is inserted. It is very likely that a known straight-shaped body will break accidentally. However, the corrugated body 100 of the present invention is zigzag-shaped and has a flexible shape. Therefore, it has the advantage of being able to effectively cope with the compressive force of the biological tissue on both ends of the corrugated body 100 and is not easily broken.

[0043] In order to provide an anchor point that enables such a corrugated body 100 to be firmly fixed within a living body, the pulling wire of the present invention, as Figure 1 shown in (a) and (b) of

[0044] a plurality of protrusions 200 are formed protruding at regular intervals on one side of the corrugated body 100. Figure 1 and Figure 1 shown in (b) of

[0045] First, in the corrugated body 100 of the present invention, for two surfaces (originally, since the corrugated body is cylindrical, there will be no two surfaces, but based on the Figure 1 cross-section shown in

[0046] it is assumed that there are two surfaces), the surface facing the outer direction rather than the corrugated body 100 side with the tip parts of the valley part 120 and the ridge part 110 as the reference is defined as the "outer side surface", and the surface facing the corrugated body 100 side is defined as the "inner side surface". Figure 1 Based on such a definition, it can be seen from Figure 1 (a) and Figure 1 (b) of

[0047] that the protrusions 200 in (a) are formed protruding in different directions from each other on the "outer side surface" at the tip parts of the valley part 120 and the ridge part 110 respectively, while the protrusions 200 in Figure 1The protrusion 200 in (a) protrudes toward the outer direction with respect to the corrugated body 100 (in other words, the outer direction of the corrugated body), so it can be said that it is a structure that effectively achieves this purpose.

[0048] However, according to Figure 1 (a) the protrusion 200, the overall structure of the pulling wire will have multiple S-shaped bends with relatively large curvatures. In this case, both ends of the corrugated body 100 cannot play a stable anchoring role on the biological tissue, and will shake or twist violently due to the compression or fluidity of the biological tissue. As a result, not only will instability occur, but there will also be a problem that the function of lifting itself cannot be achieved.

[0049] To remedy such problems, the representative structure of the present invention is precisely based on Figure 1 (b) the protrusion 200, which is formed to protrude alternately in different directions on the inner sides of the respective tip portions of the above-mentioned valley portions 120 and ridge portions 110, so that while exhibiting the characteristics generated by the bending of the above-mentioned corrugated body 100, it can provide the function of multiple anchoring points due to the extending structure of the protrusion 200.

[0050] However, when Figure 1 (b) the protrusion 200 is buried in the area between the valley portion 120 and the ridge portion 110, the fixing force on the surrounding biological tissue cannot be normally ensured. Therefore Figure 1 (b) the protrusion 200 is preferably formed to protrude higher than the two adjacent valley portions 120 (or ridge portions) on both sides, in other words, it extends further outward from the corrugated body 100 than the tip portions of the valley portion 120 or the ridge portion 110.

[0051] Furthermore, compared with sharpness, it is preferable that the tip portions of the valley portion 120 and the ridge portion 110 are chamfered to prevent the problem that the biological tissue is bent or broken unnecessarily due to external force.

[0052] To summarize the main features of the pulling wire with the corrugated body 100 and the protrusion 200 structure of the present invention, the following unique characteristics are achieved: effectively coping with the compression of biological tissue through a zigzag flexible shape, not easily broken, and having protrusions 200 protruding on the inner side thereof, so as to ensure multiple anchoring points and be able to firmly support biological tissue or exert a fixing force.

[0053] Figure 2 It is a cross-sectional view showing an embodiment in which protrusions are formed to protrude on the flat portions of the valley portion and the ridge portion.

[0054] Referring to Figure 2, the tip portions of the valley portion 120 and the ridge portion 110 in the corrugated body 100 are not in a sharp shape, but are subjected to a flat treatment of a certain length, which is herein referred to as "flat portions" 111 and 121.

[0055] Correspondingly, the protrusions 200 are formed to protrude from these flat portions 111 and 121 in the valley portion 120 and the ridge portion 110.

[0056] At this time, depending on the magnitude of the height difference between the valley portion 120 and the ridge portion 110, the flat portions 111 and 121 can extend a length corresponding to the total extension length of the valley portion 120 and the ridge portion 110, or can be slightly shorter than this. Also, the protrusions 200 can be formed to protrude in a state having a width corresponding to the total extension length of the flat portions 111 and 121, or can be formed to protrude with a shorter width than this.

[0057] First of all, the reason for performing flat treatment on the tip portions to ensure the flat portions 111 and 121 is that, while the corrugated body 100 has excessive bending and is S-shaped bent to emphasize flexibility, in order to prevent the problem of being unable to ensure the fixing force at the aforementioned two ends, the treatment is performed so that the corrugated body 100 can maintain a certain degree of directivity similar to that of extending in a straight line while ensuring the flexibility generated by bending.

[0058] In other words, this is to provide an optimal structure that can stably balance the flexibility of the corrugated body 100 and the fixability in the living body.

[0059] At this time, it is preferably designed such that the protrusions 200 do not protrude at too high a height, but have a width corresponding to the length of the flat portions 111 and 121, and have a protrusion height moderately higher than the adjacent valley portion 120 or ridge portion 110 (for example, the further protrusion height is about 0.2 to 0.5 mm), so as to ensure the inherent fixing force of the protrusions 200 while preventing the overall pull wire from being severely bent.

[0060] Figure 3 It is a cross-sectional view showing a structure in which an inclined portion is formed in the corrugated body.

[0061] Although Figure 2 shows that the boundary portion between the valley portion 120 and the ridge portion 110 is formed at a right angle or approximately so, in this case, there is a structurally unstable setting angle (for example, a right angle) at the boundary portion between each valley portion 120 and the ridge portion 110, and an unnecessary gap is generated therebetween, which may cause problems such as difficulty in dealing with the tearing of the corrugated body 100 or the appearance of a portion vulnerable to the rebounding force on the biological tissue.

[0062] To prevent such problems, as Figure 3As shown, preferably, the corrugated body 100 includes an inclined portion 130.

[0063] The inclined portion 130 is inclined in a converging direction from the ends of the two valley portions 120 adjacent to both sides of the ridge portion 110 with the ridge portion 110 as a reference. Based on the flat surfaces of the flat portions of the valley portion 120 and the ridge portion 110, the inclination angle can be between 30 and 60 degrees.

[0064] Such an inclined portion 130 can prevent the valley portion 120 and the ridge portion 110 from forming a vertical structure that can be regarded as an unstable structure, and in terms of the overall structure of the corrugated body 100, while naturally maintaining the above-mentioned curved structure, it endows the characteristics of being able to pursue the organic stability between the valley portion 120 and the ridge portion 110.

[0065] At this time, a gap will naturally occur between the inclined portion 130 and the protrusion 200, which is referred to as a crack 140 in the present invention.

[0066] Figure 4 It is a cross-sectional view showing a structure in which a slit is formed in the crack.

[0067] As described above, the crack 140 is a gap between the inclined portion 130 and the protrusion 200. If the gap presents a sharp shape similar to a "V" shape, it is structurally vulnerable to external forces from biological tissues, and thus there may be a problem of tearing starting from this part.

[0068] To prevent such a problem, the crack 140 includes a slit 150 that is further recessed in the inner direction of the protrusion 200, more preferably, on the side of the region where the protrusion 200 starts to protrude.

[0069] In particular, the slit 150 is not recessed in the middle part of the protrusion 200, but is recessed on the side of the protrusion starting region where the protrusion 200 starts to protrude. In this way, while accommodating a part of the biological tissue that penetrates into the slit 150 through the crack 140, it can provide the characteristic of firmly fixing the corresponding biological tissue.

[0070] In other words, when the slit 150 is recessed in the middle part of the protrusion 200, the erecting effect of the protrusion 200 will be offset, so that it may shake even under a weak external force. When the slit 150 is recessed into the protrusion starting region of the protrusion 200, it has the advantages of both maintaining the erecting force of the protrusion 200 and stably ensuring the accommodation space for biological tissues.

[0071] Furthermore, the inclined portion 130 may include a recessed rounded portion 131.

[0072] As shown by Figure 4It can be seen that the recessed rounded portion 131 refers to the portion that extends from the ends of the flat portions 111 and 121 to the inner end of the slit 150 in a concave-rounded manner in the direction toward the inside of the corrugated body 100 (the direction opposite to the protruding direction of the protrusion).

[0073] Due to the inclination angle of the inclined portion 130, such a recessed rounded portion 131 can prevent an unnecessary step from being generated between the valley portion 120 and the ridge portion 110 while flexibly connecting the two to ensure durability. In addition, it also provides the characteristic of being able to evenly disperse biological tissue and naturally guide it to the side of the slit 150, so as to prevent the problem that the corrugated body 100 is easily damaged due to the jamming effect of the biological tissue that starts to penetrate into the slit 150 along the inclined portion 130 or the stress concentration on a specific biological tissue part.

[0074] That is, it means that if there is no recessed rounded portion 131 and the inclined portion 130 has a simple straight-line structure, a bending point will inevitably appear. Since the bending point adopts a structure that converges toward the corrugated body 100 side, the problem of weakening the durability of the corrugated body 100 can be prevented by the action of the biological tissue on the inside of the slit 150 instead.

[0075] Figure 5 It is a cross-sectional view showing the structure of the protrusion formed in linkage with the slit of the crack.

[0076] Furthermore, based on the protruding starting end of the protrusion 200, the two slits 150 generated on both sides of the protrusion 200 can have the same recessed depth and be symmetrically formed. Therefore, the protrusion 200 includes a standing portion 210 and a plate 220.

[0077] Specifically, the standing portion 210 is a structure that protrudes with a first diameter between two adjacent (symmetric) slits, and the plate 220 has a second diameter larger than the first diameter of the slit 150 at the upper end of such a standing portion 210 and is flat-treated on the upper surface (the surface facing the opposite side of the corrugated body).

[0078] That is, the protrusion 200 adopts a structure that protrudes with a mushroom-like shape. Such a linkage structure between the slit 150 and the protrusion 200 has the following advantages.

[0079] First, the extension lines of the slit 150 and the protrusion 200 are symmetrically formed along the entire valley portion 120 and ridge portion 110 as a whole, so that structural stability can be achieved.

[0080] Second, the protrusion 200 is erected between the biological tissues that are deeply embedded in the two slits 150 that are symmetrically formed with the protrusion 200 as a reference, and due to the plate 220, the corresponding biological tissues can be stretched open, thereby preventing the corrugated body 100 from being easily broken or damaged due to the biological tissues excessively penetrating into the side of the slit 150.

[0081] Third, it is possible to achieve a balance between the zigzag flexibility of the corrugated body 100 and the fixity of the protrusion 200 to balance the opposing forces.

[0082] Finally, the plate 220 of the protrusion 200 is not oriented in a specific direction, but protrudes in a form covering the entrance of the slit 150, thereby not only enhancing the durability against external forces acting on the biological tissue in multiple directions rather than in one direction, but also, compared to the structure in which the entrance of the slit 150 is open, it is also possible to adjust the amount of biological tissue that penetrates into the slit 150 while providing a characteristic that can prevent in advance the problem of unnecessary bending of the corrugated body 100 due to the corresponding biological tissue.

[0083] Figure 6 yes Figure 5 An enlarged cross-sectional view of part A.

[0084] Reference Figure 6 , showing that the slit 150 is not formed as a groove with smooth rounding, but has an improved structure. It can be seen that the slit 150 includes Figure 5 The cross-sectional structure of is based on the expanded rounded portion 151 which can be said to be the lower extension line of the slit 150 , and the extended portion 152 which can be said to be the upper extension line of the slit 150 .

[0085] Specifically, the extended rounded portion 151 is a portion extending from the end of the inclined portion 130 to the protruding starting point of the rising portion 210 in a concave rounded manner toward the inner side of the corrugated body 100 .

[0086] The extended rounded portion 151 can exist independently of the above-mentioned recessed rounded portion 131, but it can also be a preferred embodiment to be linked with the recessed rounded portion 131 so that the recessed rounded portion 131 and the extended rounded portion 151 can extend smoothly without producing obvious step differences.

[0087] Such an extended chamfer 151, like the recessed chamfer 131 of the inclined portion 130, not only prevents unnecessary step differences from being generated in the slit 150, but also prevents the protrusion 200 from breaking due to the locking effect of biological tissue penetrating into the slit 150 or the stress concentration in a specific biological tissue location.

[0088] The extension part 152 extends from such an extended rounded part 151 through the upright part 210 to the side part of the plate 220 and becomes the part that determines the outer shape of the protrusion 200, and this extension part 152 can also be specifically specialized as follows.

[0089] Figure 7 is Figure 5 an enlarged cross-sectional view of part B.

[0090] As can be seen from Figure 7 , while serving as the upper extension line of the slit 150, the extension part 152 that determines the outer shape of the protrusion 200 preferably consists of a first part 152a, a second part 152b, and a third part 152c.

[0091] The first part 152a extends from the end of the extended rounded part 151 (the starting point of the extension part) in a concave-rounded manner toward the center of the upright part 210 to the boundary part between the upright part 210 of the protrusion 200 and the lower part of the plate 220. At this time, the so-called center direction of the upright part 210 refers to the direction toward the inside of the columnar-shaped upright part 210.

[0092] In addition, the second part 152b is a part that extends from the end of the first part 152a along the extension line of the bottom surface of the plate 220 in a concave-rounded manner toward the upper surface direction of the plate 220. Here, the upper surface direction of the plate 220 refers to the direction toward the flat upper surface side of the plate 220 with Figure 7 as the reference.

[0093] The third part 152c is a part that extends from the end of the second part 152b in a convex-rounded manner toward the outer side direction of the side part of the plate 220 to the upper end of the side part of the plate 220. At this time, with Figure 7 as the reference, when assuming that a vertical line forming the longitudinal axis of the side part of the plate 220, the outer side direction of the side part of the plate 220 refers to the outer side direction that is not the inner side of the plate 220 on this vertical line.

[0094] The first part 152a, the second part 152b, and the third part 152c as a whole perform a rounding process on the upper extension line of the slit 150 that constitutes the outer shape of the protrusion 200, that is, the extension part 152, to provide the feature of preventing the appearance of angular steps.

[0095] Specifically, the first part 152a is linked with the extended rounded part 151 to prevent the appearance of angular parts at the tip part of the slit 150, thereby reducing the phenomenon that the upright part 210 of the protrusion 200 is torn due to this angular part. At the same time, it penetrates into the inside of the upright part 210, so it can provide a basis for enabling the upright part 210 to elastically maintain the upright state.

[0096] In addition, the second part 152b is recessed and rounded in the upward direction of the plate 220, thereby preventing the problem of the circumferential side of the plate 220 tilting toward the corrugated body 100 and also laying a foundation for the plate 220 to stably maintain a circular shape under tension.

[0097] Moreover, the third part 152c extends convexly in the outer direction of the plate 220, thereby preventing the problem that the plate 220 is sandwiched between biological tissues and cannot maintain its inherent shape and is easily distorted.

[0098] By constructing the upper extension line of the slit 150, that is, the extension part 152, with the first part 152a, the second part 152b, and the third part 152c in this way, not only the function of the slit 150 itself is strengthened, but also the characteristic of laying a foundation for the outer shape of the protrusion 200 to have a more stable structure can be exerted.

[0099] Figure 8 is a cross-sectional view showing Figure 5 a modified embodiment of the protrusion.

[0100] Figure 8 It relates to a structure specialized for the upper surface of the plate 220, specifically including a flat part 221 and a curved part 222.

[0101] The flat part 221 is a part that extends circumferentially from the center of the plate 220 with a specified area, and the curved part 222 is a part that extends upward from the end of the flat part 221 in a direction opposite to the slit 150 and is rounded.

[0102] Here, the so-called "extending upward" means that the curved part 222 extends in a curved state in a direction opposite to the side of the corrugated body 100, that is, the outer direction.

[0103] That is, due to the curved part 222, the upper surface of the plate 220 has a dome or depression structure around the flat part at the central part.

[0104] According to such a structure, since the upright part 210 having a first diameter smaller than the diameter (second diameter) of the plate 220 can consciously prevent the problem of the upper surface of the plate 220 tilting toward the corrugated body 100, it has the advantage of being able to effectively maintain the upright force of the protrusion 200. In addition, the upper surface of the plate 220 can closely adhere to the surrounding biological tissues like adsorption and provide a strong adhesion force with the biological tissues, while making the peripheral side parts of the biological tissues penetrate toward the slit 150. As a result, the characteristic of being able to provide a fixing force ensuring strong adhesion with the biological tissues around the protrusion 200 can be provided.

[0105] As described above, although the structure and function of the zigzag-shaped medical pulling thread of the present invention are presented in the above description and drawings, this is only an illustrative description by way of example. The idea of the present invention is not limited to the above description and drawings. Obviously, various changes and modifications can be made without departing from the technical idea of the present invention.

[0106] Industrial Applicability

[0107] Since the present invention can achieve mass production through industrial facilities, it has industrial applicability.

Claims

1. A pulling wire, bent in a zigzag shape, characterized in that the pulling wire comprises: The corrugated body, in which troughs and ridges with a height difference are continuously arranged in a zigzag pattern along the length direction; and protrusions, which are alternately protruded in different directions on the inner sides of the tip portions of the respective troughs and ridges, and protrude higher than the adjacent troughs or ridges.

2. The pulling wire according to claim 1, characterized in that The troughs and ridges have flat portions where the tip portions are flattened for a specified length, and the protrusions are formed to protrude from the flat portions.

3. The pulling wire according to claim 2, characterized in that The corrugated body includes inclined portions that are inclined in a converging direction at the ends of the two troughs adjacent to both sides of the ridge, and have an inclination angle of 5 to 15 degrees based on the flat portion of the ridge. Cracks are generated between the inclined portions and the protrusions.

4. The pulling wire according to claim 3, characterized in that The cracks include slits that are further recessed in the inner direction of the protrusion starting region side.

5. The pulling wire according to claim 4, characterized in that The inclined portion includes a recessed rounded portion that extends from the end of the flat portion to the starting end of the slit in a concave-rounded manner toward the inner side of the corrugated body.

6. The pulling wire according to claim 4, characterized in that The slits are symmetrically formed on both sides of the protrusion with the same recessed depth based on the protrusion starting end of the protrusion. The protrusion includes: a standing portion that protrudes with a first diameter between two adjacent slits; and a plate that has a second diameter larger than the first diameter at the upper end of the standing portion and whose upper surface is flattened.

7. The pulling wire according to claim 6, characterized in that The slit includes: an extended rounded portion that extends from the end of the inclined portion to the protrusion starting point of the standing portion in a concave-rounded manner toward the inner side of the corrugated body; and an extending portion that extends from the end of the extended rounded portion through the standing portion to the side portion of the plate.

8. The pulling wire according to claim 7, characterized in that The extending portion includes: a first part that extends from the end of the extended rounded portion to the boundary portion between the standing portion and the lower part of the plate in a concave-rounded manner toward the center of the standing portion; a second part that extends from the end of the first part to the boundary portion between the lower part and the side portion of the plate in a concave-rounded manner toward the upper surface of the plate; and a third part that extends from the end of the second part to the upper end of the side portion of the plate in a convex-rounded manner toward the outer side of the side portion of the plate.

9. The pulling wire according to claim 8, characterized in that The upper surface of the plate includes: a flat portion that extends circumferentially with a specified area from the center of the plate; and a curved portion that extends from the end of the flat portion in a rounded manner toward the opposite direction of the slit.

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