Medical lifting thread bent in a zigzag pattern

Abstract

The medical lifting filament bent in a zigzag pattern according to the present invention is characterized by comprising a corrugated body having valleys and peaks of different heights arranged continuously in a zigzag pattern along the length, and protrusions (cogs) that protrude alternately in different directions from the inner surface of the distal end of each valley and peak, and that protrude higher than the adjacent valley or peak. The medical lifting filament bent in a zigzag pattern according to the present invention has the effect of ensuring flexibility by increasing the contact area with biological tissue through the corrugated body having a zigzag shape, and simultaneously enhancing fluidity and fixation through the protrusions that can ensure fixation without causing excessive bending of the corrugated body.

Description

[Technical Field]

[0001] The present invention relates to a medical lifting thread that is bent in a zigzag pattern, and more specifically, to a lifting thread that can simultaneously enhance fluidity and fixation through a main thread having an overall zigzag shape with a series of repeated valleys and peaks with different heights, and protrusions having a structure that can ensure fixation without inducing excessive bending of the main thread. [Background technology]

[0002] Medical lifting threads are inserted into the skin to lift it, and then form protrusions that reach the subcutaneous tissue and lift the skin. These thread lifting procedures are widely performed by medical professionals, including doctors, for cosmetic purposes such as reducing facial sagging and correcting nasolabial folds.

[0003] Medical lifting threads are generally made of dissolvable threads such as PDO (Polydionaxone), PLLA, and PCL, and due to their dissolvable properties, reoperations can be performed at regular intervals.

[0004] These lifting threads initially had a simple, straight-line structure, but have since evolved to include structures with various protrusions such as barbs, hooks, cones, and screws to secure the threads in place on the skin tissue.

[0005] In particular, a lifting thread has been developed that has a protrusion and a groove structure around it, allowing it to be firmly fixed to biological tissue. For example, a medical lifting thread with enhanced fixing force disclosed in Korean Patent Registration No. 10-2388216 comprises a thread, a cog extending from the surface of the thread at an angle toward the rear end of the thread, the cog comprising a first inclined portion extending at an angle toward the rear end of the thread from a first fulcrum of the thread and extending at an angle toward the rear end of the thread, and a second inclined portion extending at an end of the first inclined portion to a second fulcrum of the thread spaced a predetermined distance from the first fulcrum toward the rear end of the thread, and a first recessed portion extending toward the inside of the thread on the same line as the second inclined portion, and a groove having as its inner surface a second recessed portion extending at an end of the first recessed portion to a third fulcrum of the thread spaced a predetermined distance from the second fulcrum toward the rear end of the thread, the cog and the groove being spaced apart at a predetermined interval on one side of the thread. The first inclined portion comprises a first inclined part extending at an angle toward the rear end of the thread from a first fulcrum of the thread, and a second inclined part bent at an end of the first inclined part, extending parallel to the extending direction of the thread, and contacting the second inclined part. The second indented portion comprises a first indented part extending a certain length toward the rear end of the thread from an end of the first indented part, and a second indented part bent at the end of the first indented part, and extending to the third fulcrum. The boundary between the first indented part and the first indented part has a chamfered edge to form a rounded edge, which can strengthen the fixing force in biological tissue.

[0006] This structure has grooves formed around the inclined cogs, which strengthens the fixation force of the biological tissue through the interlocking structure of the cogs and grooves, but has the problem that the thread has a linear structure, which limits the fluidity of the thread itself.In addition, the protrusions are biased in a specific direction, making it vulnerable to pressure from biological tissue acting in directions other than the specified direction.

[0007] Therefore, there is a need to develop a lifting thread with a novel and innovative structure that can ensure fluidity at the thread level, which has a greater impact on the overall volume and diameter of the lifting thread than cogs or protrusions, and can strengthen fixing power while compensating for the problem of easy breakage. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Registration No. 10-2388216 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to overcome the problems of the above-mentioned techniques, and its main object is to provide a corrugated yarn having a zigzag shape with a series of repeated valleys and peaks having different heights, and a lifting yarn having protrusions that can ensure fixing power without causing excessive bending of the corrugated yarn, thereby enhancing both fluidity and fixation.

[0010] Another object of the present invention is to provide a detailed structure that can simultaneously provide structural stability and strong fixation of the interlocking structure of the corrugated yarn and the projections.

[0011] Another object of the present invention is to realize a gap between the corrugated yarn and the projections, thereby maximizing the synergistic effect of the corrugated yarn and the projections on their inherent functions.

[0012] A further object of the present invention is to ensure the stability of the protrusions by a specialized structure of the protrusions in conjunction with the slits. [Means for solving the problem]

[0013] To achieve the above object, the medical lifting thread bent in a zigzag pattern according to the present invention is characterized by comprising a corrugated body in which valleys and peaks having different heights are continuously arranged in a zigzag pattern along the length, and protrusions (cogs) that protrude alternately in different directions from the inner surface of the distal end of each of the valleys and peaks, and protrude higher than the adjacent valleys or peaks.

[0014] The valley and the tip portion may have a flat part that is flattened over a certain length, and the protrusion may be formed to protrude from the flat part.

[0015] In addition, the corrugated yarn is characterized in that the ends of the two valleys adjacent to both sides of the peak are inclined toward each other, and have an inclination angle of 5 to 15 degrees based on the flat part of the peak, and cracks are generated between the inclined parts and the protrusions. [Effects of the Invention]

[0016] According to the medical lifting thread bent in a zigzag pattern according to the present invention, 1) the corrugated thread with a zigzag shape increases the contact area with the biological tissue, ensuring flexibility, and the protrusions, which can ensure fixation without causing excessive bending of the corrugated thread, simultaneously strengthen fluidity and fixation, 2) the sharp valleys and peaks are improved to have flat parts and inclined parts, further increasing the stability of the corrugated thread and the protrusion structure and the fixation of the biological tissue, 3) the cracks in the gaps between the corrugated thread and the protrusions and the additional recessed slits not only enhance the overall stability of the lifting thread and the traction and fixation force on the biological tissue, but also 4) the specialized slit structure leads to an improved structure of the protrusions, which has the effect of upgrading the standing stability, durability, and fixation force on the biological tissue of the protrusions. [Brief explanation of the drawings]

[0017] [Figure 1]FIG. 1 is a cross-sectional view showing a basic embodiment of the lifting thread of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing an embodiment in which protrusions are formed on flat parts of the valleys and peaks. [Figure 3] FIG. 3 is a cross-sectional view showing a structure in which an inclined portion is formed in a corrugated main yarn. [Figure 4] FIG. 4 is a cross-sectional view showing a structure in which a slit is formed in a crack. [Figure 5] FIG. 5 is a cross-sectional view showing the structure of the protrusions formed in conjunction with the slits of the cracks. [Figure 6] FIG. 6 is an enlarged cross-sectional view of part A in FIG. [Figure 7] FIG. 7 is an enlarged cross-sectional view of part B in FIG. [Figure 8] FIG. 8 is a cross-sectional view showing a modification of the protrusion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] The best mode for carrying out the invention is a corrugated yarn having a corrugated body in which valleys and peaks having different heights are continuously arranged in a zigzag pattern along the length direction, and protrusions (cogs) that protrude alternately in different directions from the inner surface of the tip portions of the valleys and peaks, and that protrude higher than the adjacent valleys or peaks.

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which are not drawn to scale and in which like reference numerals refer to like elements throughout the drawings.

[0020] FIG. 1 is a cross-sectional view showing a basic embodiment of the lifting thread of the present invention.

[0021] The lifting thread of the present invention is basically composed of a main thread and protrusions, similar to known lifting threads having cogs.

[0022] The present thread is made of a material that dissolves in the body, like well-known medical threads, such as PDO (polydioxanone), or may further comprise or at least contain PLLA (Poly L Lactic Acid) or PCL (Polycaprolacton), which are known to promote collagen formation.

[0023] In particular, the yarn of the present invention is different from known yarns in that it is basically zigzag shaped, and in the present invention, such zigzag shaped yarn is called a corrugated yarn (corrugated-body) 100.

[0024] The corrugated yarn 100 of the present invention has a structure in which valleys (valley portions) 120 and peaks (peak portions) 110 having different heights are continuously arranged in a zigzag pattern along the length of the corrugated yarn 100.

[0025] Of course, when the corrugated fiber is introduced into a living body, the thread 100 does not have a vertical arrangement structure with different heights as shown in FIG. 1, but for the sake of convenience, the higher side portions are named as peaks 110 and the lower side portions are named as valleys 120 based on the illustration standards of FIG. 1.

[0026] As shown in FIGS. 1(a) and 1(b), the peaks 110 and valleys 120 may be formed while maintaining a zigzag shape and having sharp tip portions, but as will be described later, the portions between the peaks 110 and valleys 120 may be chamfered smoothly without corners, or the tip portions of each peak 110 and valley 120 may be flattened with flat parts 111, 121 having a certain length, as will be described later.

[0027] The corrugated thread 100 has a zigzag shape compared to a known straight-shaped thread that extends in a straight line from the starting end to the end, thereby increasing the surface area that comes into contact with the living body, and thus ensuring enhanced traction and fixation forces in the living body.

[0028] In addition, natural restoring force and repulsive force are generated within the biological tissue into which the lifting thread is inserted, and while known straight-shaped threads are prone to breaking, the corrugated thread 100 of the present invention has a zigzag and flexible shape, which allows it to efficiently respond to the compressive force of the biological tissue on both ends of the corrugated thread 100 and is therefore less likely to break.

[0029] In order to provide anchor points that allow the corrugated thread 100 to be firmly fixed in the living body, the lifting thread of the present invention has a plurality of protrusions 200 formed at regular intervals on one side of the corrugated thread 100, as shown in Figures 1(a) and 1(b).

[0030] The protrusions 200 of the present invention are formed by protruding in different directions from the tip end portions of the valleys 120 and peaks 110 of the corrugated yarn 100 when the valleys 120 and peaks 110 are arranged continuously. Depending on the formation position and protruding direction of the protrusions 200, they can be classified into two structures as shown in Figures 1(a) and 1(b).

[0031] First, regarding both surfaces of the corrugated yarn 100 of the present invention (since the corrugated yarn originally has a cylindrical shape, two surfaces are not generated, but it is assumed that two surfaces are generated based on the cross section of FIG. 1), the surface facing outward, not toward the corrugated yarn 100, based on the tip portions of the valleys 120 and peaks 110 is defined as the "outer surface," and the surface facing toward the corrugated yarn 100 is defined as the "inner surface."

[0032] Based on this definition, when looking at Figures 1(a) and 1(b), it can be seen that the protrusions 200 in Figure 1(a) are formed by alternately protruding in different directions from the "outer surfaces" of the tip portions of the valleys 120 and the peaks 110, while the protrusions 200 in Figure 1(b) are formed by alternately protruding in different directions from the "inner surfaces" of the tip portions of the valleys 120 and the peaks 110.

[0033] Generally, the main purpose of the protrusions of a lifting thread is to secure multiple anchor points in the body and ensure stable fixation to biological tissue. Since the protrusions 200 in Figure 1(a) protrude outward from the corrugated thread 100 (in other words, toward the outside of the corrugated thread), it can be said that this structure fully achieves this purpose.

[0034] However, according to the protrusions 200 of FIG. 1(a), the entire structure of the lifting thread has severe curves and multiple S-shaped bends, and in this case, both ends of the corrugated thread 100 cannot stably adhere to the biological tissue, and they shake or shrink severely due to the pressure or fluidity of the biological tissue, resulting in instability and the inability to perform the original lifting function.

[0035] The representative structure of the present invention to solve this problem is based on the protrusions 200 shown in FIG. 1(b), which are formed to protrude alternately in different directions from the inner surfaces of the tip portions of the valleys 120 and peaks 110, respectively, and can serve as branch anchor points due to the extension structure of the protrusions 200 while taking advantage of the characteristics of the bending of the corrugated yarn 100 described above.

[0036] However, if the protrusion 200 in FIG. 1(b) is buried in the area between the valleys 120 and the peaks 110, it will not be possible to properly secure the fixing force to the surrounding biological tissue. Therefore, it is preferable that the protrusion 200 in FIG. 1(b) is formed to protrude higher than the two adjacent valleys 120 (or peaks) on both sides, in other words, to extend further outside the corrugated thread 100 than the tip end of the valleys 120 or peaks 110.

[0037] Furthermore, it is preferable that the tip portions of the valleys 120 and peaks 110 are chamfered rather than sharpened to prevent unnecessary bending or breaking due to external force from living tissue.

[0038] To summarize again the main features of the lifting thread having the structure of the corrugated thread 100 and the protrusions 200 of the present invention, it has a zigzag and flexible shape that efficiently responds to pressure on biological tissue and does not easily break, and the protrusions 200 protrude between them (on the inner surface) to secure multiple anchor points and provide a unique characteristic of firmly supporting biological tissue or exerting a fixing force.

[0039] FIG. 2 is a cross-sectional view showing an embodiment in which protrusions are formed on flat parts of the valleys and peaks.

[0040] Referring to FIG. 2, it can be seen that the tip portions of the valleys 120 and peaks 110 of the corrugated yarn 100 are not sharply pointed but are flattened at a certain length, which are called "flat parts" 111, 121.

[0041] In response to this, the protrusions 200 are formed to protrude from the flat parts 111 and 121 of the valleys 120 and peaks 110 .

[0042] In this case, depending on the difference in height between the valleys 120 and the peaks 110, the flat parts 111 and 121 may be extended to a length corresponding to the entire length of the valleys 120 and the peaks 110, or slightly shorter than this. In addition, the protrusions 200 may be formed to protrude with a width corresponding to the entire length of the flat parts 111 and 121, or may be formed to protrude with a width shorter than this.

[0043] First, the reason why the tip portions are processed flat to secure the flat parts 111, 121 is that the corrugated yarn 100 has a very large bend and bends in an S-shape to emphasize flexibility, but to prevent the above-mentioned problem of not being able to secure the fixing force at both ends, the corrugated yarn 100 is processed so that it can maintain some degree of directionality like an extended straight shape while simultaneously securing flexibility due to bending.

[0044] In other words, this is to provide an optimum structure that can stably combine the flexibility of the corrugated yarn 100 with its fixation to the living body.

[0045] In this case, it is preferable that the protrusions 200 are designed to have a width equivalent to the length of the flat parts 111, 121 and a protruding height that is appropriately higher than the adjacent valleys 120 or peaks 110 (for example, an additional protruding height of approximately 0.2 to 0.5 mm), rather than being protruded to a very high height, so as to ensure the original fixing force of the protrusions 200 while not causing severe bending of the entire lifting thread.

[0046] FIG. 3 is a cross-sectional view showing a structure in which an inclined portion is formed in a corrugated main yarn.

[0047] FIG. 2 shows that the boundary portions between the valley portions 120 and the peak portions 110 are formed at or close to a right angle. In this case, however, the boundary portions between each valley portion 120 and peak portion 110 may have a structurally unstable installation angle (e.g., a right angle) and unnecessary gaps may be generated between them, which may cause the corrugated yarn 100 to tear or may create portions that are vulnerable to the repulsive force of biological tissue, making it difficult to address the problem.

[0048] To prevent such problems, the corrugated yarn 100 preferably includes an inclined portion 130 as can be seen in FIG.

[0049] The inclined portions 130 are inclined toward each other at the ends of the two valleys 120 adjacent to both sides of the peak 110, with the peak 110 as the base, and may have an inclination angle of 30 to 60 degrees with the flat surfaces of the valleys 120 and the flat parts of the peak 110 as the base.

[0050] Such inclined portion 130 prevents the valleys 120 and the peaks 110 from being formed in a vertical structure, which can be said to be an unstable structure, and imparts characteristics that can pursue organic stability between the valleys 120 and the peaks 110 while naturally maintaining the above-mentioned curved structure in terms of the overall structure of the corrugated yarn 100.

[0051] At this time, a gap naturally occurs between the inclined portion 130 and the protrusion 200, which is called a crack 140 in the present invention.

[0052] FIG. 4 is a cross-sectional view showing a structure in which a slit is formed in the crack.

[0053] As mentioned above, the crack 140 is the gap between the inclined portion 130 and the protrusion 200, but if this gap has a sharp shape like a "V", it is structurally weak against external forces generated by biological tissue, and there is a possibility that it may tear from this area.

[0054] To prevent such a problem, the crack 140 includes a slit 150 formed in an inward direction of the protrusion 200, more preferably, on the region side where the protrusion 200 starts to protrude.

[0055] In particular, the slit 150 is not recessed into the middle part of the protrusion 200 but is recessed toward the protrusion start region where the protrusion 200 begins to protrude, and can provide the property of firmly fixing the biological tissue by accommodating a portion of the biological tissue that has penetrated into the slit 150 through the crack 140.

[0056] In other words, if the slit 150 is recessed into the middle part of the protrusion 200, it will cancel out the standing role of the protrusion 200, causing it to wobble even with a weak external force, whereas if the slit 150 is recessed into the protrusion start region of the protrusion 200, it has the advantage of being able to stably secure the space to accommodate biological tissue while maintaining the standing force of the protrusion 200.

[0057] Further still, the ramp 130 may include a recessed rounding part 131 .

[0058] As can be seen from FIG. 4, the recessed rounding part 131 refers to a portion that extends from the end of the flat parts 111, 121 to the inner end of the slit 150 in a concave rounded manner toward the inside of the corrugated yarn 100 (the opposite direction to the protrusion direction of the protrusions).

[0059] Such recessed rounding part 131 not only prevents unnecessary steps from occurring between the valley portion 120 and the peak portion 110 due to the inclination angle of the inclined portion 130, but also flexibly connects the two to ensure durability, and has the property of uniformly distributing the biological tissue and naturally guiding it toward the slit 150, thereby preventing problems such as an engagement action of biological tissue that begins to bite into the slit 150 along the inclined portion 130 and stress concentration at a specific biological tissue site, which could easily damage the corrugated thread 100.

[0060] In other words, if the inclined portion 130 is made to have a simple straight structure without the recessed rounding part 131, a bending point will inevitably occur. However, since this bending point is structured to converge toward the corrugated thread 100, it can guide the biological tissue into the slit 150, thereby preventing the problem of the durability of the corrugated thread 100 becoming weak.

[0061] FIG. 5 is a cross-sectional view showing the structure of the protrusions formed in conjunction with the slits of the cracks.

[0062] Furthermore, the two slits 150 generated on both sides of the protrusion 200 based on the protrusion starting end of the protrusion 200 can be formed symmetrically with the same recess depth, and thus the protrusion 200 includes a standing portion 210 and a plate 220.

[0063] Specifically, the standing portion 210 has a structure formed by protruding with a first diameter between two adjacent (symmetrical) slits, and the plate 220 has a second diameter at the upper end of the standing portion 210 that is larger than the first diameter of the slit 150, and the upper surface (the surface facing away from the corrugated yarn) is flattened.

[0064] That is, the protrusion 200 has a mushroom-like shape and protrudes outward, and the interlocking structure of the slit 150 and the protrusion 200 provides the following effects.

[0065] First, the extension lines of the slits 150 and the protrusions 200 are formed symmetrically along the entire valleys 120 and the entire peaks 110, thereby achieving structural stability.

[0066] Secondly, the protrusion 200 stands up between the tissue that has been wedged between the two slits 150 formed symmetrically with respect to the protrusion 200, and the plate 220 can spread the tissue, thereby preventing the tissue from being wedged too far toward the slit 150 and easily cutting or damaging the corrugated thread 100.

[0067] Thirdly, the opposing forces between the flexibility of the zigzag form of the corrugated yarn 100 and the fixation of the protrusions 200 can be balanced.

[0068] Finally, the plate 220 of the protrusion 200 protrudes in a manner that covers the entrance of the slit 150 without being directed in a specific direction, which not only enhances durability against external forces acting on biological tissue in multiple directions rather than in one direction, but also provides the characteristic of being able to adjust the amount of biological tissue that has entered the slit 150 compared to a structure in which the entrance of the slit 150 is open, thereby preventing the corrugated thread 100 from being unnecessarily bent by the biological tissue.

[0069] FIG. 6 is an enlarged cross-sectional view of part A in FIG.

[0070] Referring to FIG. 6, it can be seen that the slit 150 is not simply a rounded groove but has an advanced structure, and that the slit 150 includes an extended rounding part 151, which can be considered an extension of the lower part of the slit 150, and an extended part 152, which can be considered an extension of the upper part of the slit 150, based on the cross-sectional structure of FIG. 5.

[0071] Specifically, the extended rounding part 151 refers to a portion extending from the end of the inclined portion 130 to the protrusion starting point of the standing portion 210 so as to be rounded in a concave shape toward the inside of the corrugated yarn 100 .

[0072] This extended rounding part 151 can exist separately from the above-mentioned recessed rounding part 131, but it can also be a preferred embodiment that it is linked to the recessed rounding part 131 so that the recessed rounding part 131 and the extended rounding part 151 are smoothly extended without creating any steps.

[0073] This extended rounding part 151, like the recessed rounding part 131 of the inclined portion 130, prevents unnecessary steps from occurring within the slit 150, and also serves to prevent problems such as the retention of biological tissue that has dug into the slit 150 and stress concentration at a specific biological tissue location, which could cause the protrusion 200 to break.

[0074] The extension part 152 extends from the extended rounding part 151 through the upright part 210 to the side of the plate 220, and determines the outer shape of the protrusion 200. The extension part 152 can also be specialized in detail as follows.

[0075] FIG. 7 is an enlarged cross-sectional view of part B in FIG.

[0076] As can be seen from FIG. 7, the extension part 152, which acts as an upper extension of the slit 150 and determines the outer shape of the protrusion 200, preferably comprises first, second and third sections 152a, 152b and 152c.

[0077] The first section 152a is a portion that extends from the end of the extended rounding part 151 (the starting point of the extended part) to the boundary between the upright part 210 of the protrusion 200 and the lower part of the plate 220, rounding in a concave shape toward the center of the upright part 210. In this case, the center direction of the upright part 210 refers to the direction toward the inside of the upright part 210, which has a pillar shape.

[0078] The second section 152b is a portion that extends from the end of the first section 152a along the extension line of the bottom surface of the plate 220 so as to be rounded in a concave shape toward the top surface of the plate 220. Here, the top surface direction of the plate 220 refers to the direction facing the flat top surface of the plate 220 with reference to FIG.

[0079] The third section 152c is a portion that extends from the end of the second section 152b to the upper side end of the plate 220 so as to be rounded in a convex shape toward the outer side of the plate 220. In this case, assuming that the side of the plate 220 forms a line perpendicular to the longitudinal axis based on FIG. 7, the outer side of the plate 220 means the outer direction, not the inner direction, of the plate 220 on this perpendicular line.

[0080] The first, second and third sections 152a, 152b and 152c provide a feature of rounding the upper extension line of the slit 150, i.e., the extension part 152, which forms the overall outline of the protrusion 200, thereby preventing the occurrence of angular steps.

[0081] In detail, the first section 152a works in conjunction with the extended rounding part 151 to prevent the formation of an angled portion at the tip of the slit 150, and is dug into the inside of the upright portion 210 while reducing the phenomenon in which the upright portion 210 of the protrusion 200 is torn off due to this angled portion, thereby providing a foundation for the upright portion 210 to maintain an elastic upright state.

[0082] In addition, the second section 152b is rounded in a concave shape toward the upper surface of the plate 220 to prevent the peripheral edge of the plate 220 from sagging toward the corrugated yarn 100, and is provided with a base that allows the plate 220 to stably maintain its circular shape while being tensioned.

[0083] Furthermore, the third section 152c extends outwardly of the plate 220 in a convex shape, thereby preventing the plate 220 from being pinched between biological tissues and easily collapsing without maintaining its original shape.

[0084] The upper extension of the slit 150, i.e., the extension part 152, is constructed in the first, second, and third sections 152a, 152b, and 152c, which not only strengthens the function of the slit 150 itself, but also provides the characteristic of solidifying the foundation for the outer shape of the protrusion 200 to have a more stable structure.

[0085] FIG. 8 is a cross-sectional view showing a modification of the protrusion shown in FIG.

[0086] FIG. 8 shows a specialized structure of the upper surface of the plate 220, which specifically includes a flat section 221 and a bending section 222.

[0087] The flat section 221 is a portion that expands from the center of the plate 220 to the periphery to have a certain area, and the bending section 222 is a portion that extends upward from the end of the flat section 221 to be rounded in the opposite direction of the slit 150.

[0088] Here, "extending upward" means that the bending section 222 is extended in a bent state toward the outside, that is, in the opposite direction to the corrugated yarn 100 side.

[0089] That is, the bending section 222 causes the upper surface of the plate 220 to have a dome or basin structure around the flat section in the central region.

[0090] According to this structure, the problem of the upper surface of the plate 220 sagging toward the corrugated thread 100 can be intentionally prevented by the standing portion 210 having a first diameter smaller than the diameter (second diameter) of the plate 220, and not only can it have the advantage of reliably maintaining the standing force of the protrusion 200, but also the upper surface of the plate 220 can adhere to the surrounding biological tissue as if it were suction-like, providing strong adhesion to the biological tissue, and allowing the peripheral portion of the biological tissue to bite into the direction of the slit 150, resulting in a characteristic of ensuring fixing force based on strong adhesion to the biological tissue around the protrusion 200.

[0091] As explained above, the structure and function of the medical lifting thread bent in a zigzag shape according to the present invention have been expressed in the above explanations and drawings, but this is merely an example, and the concept of the present invention is not limited to the above explanations and drawings, and various changes and modifications are possible within the scope of the technical concept of the present invention. [Industrial Applicability]

[0092] The present invention can be mass-produced through industrial facilities and is therefore industrially applicable.

Claims

1. It is a lifting thread that is curved in a zigzag shape. a corrugated yarn in which valleys and peaks having different heights are continuously arranged in a zigzag pattern along the length direction; and protrusions formed on inner surfaces of the tip portions of the valleys and peaks alternately in different directions and protruding higher than the adjacent valleys or peaks.

2. The valley portions and the peak portions are The tip portion has a flat part that is flattened over a certain length, The protrusion is The lifting thread according to claim 1, wherein the lifting thread is formed to protrude from the flat part.

3. The corrugated yarn is The two adjacent valleys on both sides of the peak are inclined toward each other at their ends, and have an inclination angle of 5 to 15 degrees based on the flat part of the peak, The lifting thread according to claim 2, wherein cracks are generated between the inclined portion and the protrusion.

4. The crack is The lifting thread according to claim 3, further comprising a slit formed in an inward direction on the side of the protrusion starting region of the protrusion.

5. The inclined portion is 5. The lifting yarn according to claim 4, further comprising an indented rounding part extending from the end of the flat part to the starting end of the slit so as to be rounded concavely inward of the corrugated yarn.

6. The slit is The recesses are formed symmetrically on both sides of the protrusion with the same recess depth based on the protrusion start end of the protrusion, The protrusion is a raised portion having a first diameter and protruding between two adjacent slits; 5. The lifting thread according to claim 4, further comprising: a plate having a second diameter at an upper end of the upstanding portion, the second diameter being larger than the first diameter, and a flattened upper surface.

7. The slit is an extended rounding part extending from an end of the inclined portion to a protrusion start point of the standing portion so as to be rounded in a concave shape toward the inside of the corrugated yarn; 7. The lifting string according to claim 6, further comprising an extension part extending from an end of the extended rounding part through the upright part to a side of the plate.

8. The extension part is a first section extending from an end of the extended rounding part to a boundary between the upright portion and the lower portion of the plate so as to be rounded in a concave shape toward the center of the upright portion; a second section extending from an end of the first section to a boundary between the bottom and side of the plate so as to be rounded in a concave shape toward the top surface of the plate; 8. The lifting string according to claim 7, further comprising a third section extending from the end of the second section to the upper end of the side of the plate so as to be rounded convexly outward from the side of the plate.

9. The upper surface of the plate is a flat section extending from the center of the plate to the periphery to have a constant area; The lifting thread according to claim 8, further comprising a bending section extending from an end of the flat section in a direction opposite to the slit so as to be rounded upward.

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