JP2005066253A - Soft nylon suture thread suitable for suturing oral cavity region - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide soft nylon suture thread suitable for suturing an oral cavity region when the oral cavity region is sutured after an operation, by considering the fact that, since silk thread, where bacteria grow, is often used in a conventional manner while nylon, which does not become a vehicle for the bacteria, comes to be used in recent years, but is hard to cause a large node, is easily untied, and as a result, requires a hard and long thread end, so as to allow a patient to have pain. <P>SOLUTION: Nylon 6 and nylon 66 are copolymerized for obtaining a thread to be used for suturing the oral cavity region after the operation. The copolymer is transferred by a metallic grid melting machine and filtered. The polymer is measured in a vessel consisting of a filter and a spinning cap. Melted filament passes through a tub in order to be cooled with liquid and is solidified, drawn by diameter to be required, heated, and re-extended to have a necessary length. The acquired thread is reduced in tissue reactions and enlarged in strengths and extension. Then the node is made to be firm, the suturing thread end is made to be shorter, and its material is soft, so that a stimulation is reduced at the suturing thread end. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a suture thread in oral surgery, and more particularly, to a soft nylon suture adapted to suture in the oral region that minimizes mucosal irritation and tissue reaction at the suture end.

  Traditionally, sutures in the oral region have had cotton threads and intestinal wires, etc., but silk threads have come in handy. In recent years, nylon threads are frequently used, and Gore-Tex threads are used in implant surgery. There is also a case. In the 1940s, the development of synthetic yarns such as nylon yarns has made it possible to reduce the tissue reaction seen in natural yarns and to make the thickness and quality of each product uniform. In the later suture number, the suture end tends to deteriorate the oral environment.

  Most of the sutures in oral surgery are removed within 10 days after the operation, and there are many cases using non-absorbable threads. Infrequently, sutures are rarely placed, but infection by sutures is minimized. Must be prevented. In particular, when implant surgery is performed, the selection of a suture that meets the purpose so as not to be a reliable and aesthetic closure of the suture wound and a source of infection after the suture is a major issue. A silk thread is one of the most familiar sutures used by dentists. In the basic composition of raw silk, the two fibroin fibers are solidified with non-fibrous sericin consisting of collagen. Therefore, there is a problem in using it for a surgical operation as it is. On the other hand, nylon thread is an alternative to silk thread, but conventional nylon thread is harder to tie than silk thread, and the suture nodule is easier to unravel. Therefore, the end of the suture should be left at the end of the suture nodule around 10 mm. I must. In addition, there is pain when the cut surface of the thread hits the gingiva, tongue, etc., leaving it uncomfortable and leaving a problem in the oral environment. A method is required.

  The present invention has been invented in view of the above circumstances, and it must be soft and warm to the touch with a small suture nodule and to be easy to tie. According to the soft nylon suture of the present invention, since the suture knot is tight, the suture knot does not break even if the suture end is cut short, and the capillary phenomenon is small, so that the suture that does not become a bacterial medium can be obtained. It is an object of the present invention to provide a soft nylon suture that is obtained and adapted to suture in the oral region.

  In order to achieve the above object, the present invention is a thread used for postoperative suturing in the oral region, which has a high tensile strength, a stable tensile strength over a long period of time, a little tissue reaction, and a soft suture nodule in a bright field. It is characterized by noninvasive thread removal. An intraoral suture has a high tensile strength and elongation at break, and has wet, bent, and knot strength, and can form a knot in a small form.

  Further, the invention of claim 2 is characterized in that the suture end can be reduced by condensing the suture nodules in a small size, and the mucous membrane irritation is small. Since the soft nylon suture knot is compact and robust, the end of the conventional nylon suture thread can be broken if the suture knot can be released if it is not left as long as about 10 mm. Nylon suture can be shortened to about 2 millimeters, and the softness of soft nylon suture reduces the irritation of gingiva and tongue by the cut end of the suture, The object is to reduce the foreign body feeling and to prevent an unpleasant feeling during eating.

  By using a thread for copolymerizing nylon 6 and nylon 66, that is, a soft nylon suture, for the post-surgical suture in the oral region, the following problems that have been plaguing dentists for a long time can be solved.

  Regarding the properties, nylon 6 and nylon 66 are copolymerized, solidified and stretched through various processes, and the result is a soft nylon suture, which increases the strength by repeated stretching. Nylon sutures have an elongation of about 3 times that of regular nylon sutures. Thus, it can be said that not only the sutured knot can be made small and hard, but also non-invasive thread removal can be performed in a bright field. Further, since it is nylon, it can be said that there are few capillarity phenomena, a high tensile strength, a stable tensile strength over a long period of time, a little tissue reaction, wet, bent and knot strength, and a high tensile strength and elongation at break.

  Regarding the nodule, the soft nylon suture of the present invention can reduce the foreign body feeling in the postoperative suture in the oral region. It is clear from the practice of dental treatment and various examinations that the nodule is small and tight and difficult to unravel, so even if the suture end is shortened to about 2 mm, it cannot be unraveled by normal suturing. How is the soft nylon suture, which is the monofilament of the present invention, suitable for a suture in the oral region compared to about 10 millimeters at the suture end when using a regular nylon suture? I understand well.

  Regarding the tissue reaction, it can be said that the synthetic fiber has a smaller tissue reaction than natural fibers. However, in any case, it receives a biological reaction as a foreign substance, and once infection occurs, the non-absorbable suture is treated as a foreign substance in the living body. In the tissue reaction, the position of nylon in the living body is silk, Dacron, and monofilament processed nylon in that order, and nylon is the smaller one.

  FIG. 1a compares the size of a regular-nylon suture knot 2 with a regular-nylon suture 1 and a soft nylon suture 3 of FIG. 1b and a knot-soft knot 4 with a single nylon knot. For this purpose, the nylon sutures of the two are arranged and photographed with a 50 × microscope. The above FIG. 1 a is a regular nylon suture 1 and the lower FIG. 1 b is a soft nylon suture 3. is there. As is apparent from FIG. 1, it can be seen that the soft nylon suture nodule 4 of the soft nylon suture 3 has a smaller nodule than the nodule 2 of the regular nylon suture.

The polyamide obtained from Caprolacta cocoon is nylon 6 [—NH (CH ₂ ) ₅ CH—] _n , and the polyamide obtained from hexamethylenediamine and adipic acid is nylon 66 [—CO (CH ₂ ) ₄ CONH (CH _{2) 6 NH-] n.} The soft nylon suture 3 of the present invention is obtained by copolymerizing this nylon 6 and nylon 66 into a suture according to the intended use. A container consisting of a fine filter and a spinneret that is precisely transported by a metering pump by transferring the polymer with an extruder or a metal grid melting machine, which was an early process, for melt spinning. Once weigh out and exit the spinneret, the molten filaments are passed through the bath to cool and solidify, and at the same time are drawn to the required diameter. Next, the fiber that has undergone this process is heated and drawn to a length of 300 to 700 percent of the length obtained above. As a result, crystallization due to orientation occurs and the tensile strength is improved.

  Next, according to the graphs of FIGS. 2, 3, 4 and 5, the soft nylon suture 3 of the present invention is obtained by copolymerizing nylon 6 and nylon 66 at a ratio of 85:15 to a regular nylon suture. The fact that it is softer than 1 was reported by the Tokyo Metropolitan Industrial Technology Research Institute on May 6, 2003.

  FIG. 2 is a plan view of the yarn measuring sheet 10 used for the current measurement, FIG. 3a is a cross-sectional view of the yarn measuring sheet 10, and FIG. 3b is the same yarn measuring sheet. The yarn measuring sheet 10 is a cross-sectional view when the sheet 10 is bent. The yarn measuring sheet 10 is composed of 30 double-sided adhesive tapes a11 and double-sided adhesive tapes at equal intervals according to the graph paper a5 and graph paper b6. Line up on b12, press double-sided adhesive tape c13 and double-sided adhesive tape d14 on top of 30 yarn measuring 7s, and apply graph paper c8 and graph paper d9 to apply pressure FIG. 5 is a graph showing the relationship between the applied force and the distance when the yarn measurement sheet 10 thus bonded is bent as shown in FIG. 3b by a pure bending tester. The graph of FIG. 5 represents the force applied to the Y (vertical) axis and the distance moved on the X (horizontal) axis. A substantially curved line appearing in a sword shape from the A point to the D point with the coordinate axis 0 as the center represents the relationship between the force applied to the regular nylon suture 1 and the distance. A sword-shaped approximate curve from the coordinate axis 0 to the point C from the point B represents the soft nylon suture 3. The unit of force applied is gram (g) added to one yarn by calculation, and the width parallel to the Y axis of 2HBf in the graph indicates the restoring force of the bent yarn. Compared with the nylon suture 1, the soft nylon suture 3 has a stronger restoring force. Further, when the lengths of the points A and B are compared from the X axis, the point B is shorter, and thus the result is that the soft nylon suture 3 is softer. By the way, the pure bending tester (PURE: BENDING: TESTER) is KES-FB2, B is bending stiffness, SENS is 2 × 1, 30 threads, mode is 1 cycle, B is K = 0.5 ˜1.5 cm, 2HB is K = 1.0 cm, repetition is 1 time.

  Next, the test results of the knot tensile strength of the knot 2 of the regular nylon suture and the knot 4 of the soft nylon suture of the present invention will be described with reference to Table 1. According to the 1999 non-absorbable plastic suture standard strength by the Ministry of Health and Welfare, when comparing the yarn diameter, tensile strength and elongation rate, there is not much change in tensile strength. It can be seen that the knot 4 of the soft nylon suture is much larger. The regular nylon suture thread 1 here refers to a nylon suture thread that is generally used at present. It is shown below from the tensile strength test report of the suture nodule.

上記の表１から、引張り強さに差は認められないが、伸び率に極めて大きい差があることがわかり、言い換えるとソフトナロン縫合糸３は軟らかいということがいえ、結節が解けにくいということであり、これがソフトナイロン縫合糸３の特徴である。

From Table 1 above, there is no difference in tensile strength, but it can be seen that there is a very large difference in elongation. In other words, it can be said that the soft Naron suture 3 is soft and the knot is difficult to unravel. There is a feature of the soft nylon suture 3.

  Next, a load was applied to the soft nylon suture thread 3, and the elongation due to the load, the load was removed and compared with the original length, and the amount of elongation was measured for each thread thickness. The minimum load loading of the knot tensile strength according to the above criteria was applied, and the elongation percentage of each number of sutures was measured.

Test method 1. An interval of about 100 mm is marked on the suture, a specified load is applied, the load is held for 1 minute, the load is removed for 2 minutes, the load is repeatedly applied, and the stretched length is measured.
2. Remove the suture from the tensile tester and leave it for 5 minutes to measure the length of the suture.
3. Length after removing the load-Original length = Length stretched without returning

上記の伸び率は前記基準の規定荷重であり、平均荷重伸び率を次の修正係数で算出すると表３のようになる。

The above-mentioned elongation rate is the standard specified load. When the average load elongation rate is calculated by the following correction coefficient, it is as shown in Table 3.

Formula 1

Formula 2

  Further, the tensile strength of the suture between the regular nylon suture 1 and the soft nylon suture 3 is compared by a test result table. A regular nylon standard number 2-0 monofilament is measured at room temperature 20 ° C. ± 1 ° C.

次に、ソフトナイロン基準号数２−０を、同じくモノフイラメント室温２０℃±１℃の同一条件で測定する。

Next, the soft nylon standard number 2-0 is similarly measured under the same conditions of monofilament room temperature 20 ° C. ± 1 ° C.

  As described above, the soft nylon suture thread 3 adapted to the suture of the oral cavity region of the present invention is not limited to the description of the above embodiment, and all those within the same technical scope can be applied. Of course.

  The present invention is intended for patients undergoing dental treatment, and it is natural for any human being to receive treatment at a dental care facility, and the purpose is to reduce the burden on the patient. Therefore, the present invention is provided to medical institutions and related industries.

FIG. 6 is a copy of a knot between a regular nylon suture and a soft nylon suture. It is a top view of a yarn measurement sheet. It is sectional drawing of a thread | yarn measurement sheet. It is a graph of the regular nylon suture and the soft nylon suture by the measurement of the bending characteristic of a yarn measurement sheet.

Explanation of symbols

1 regular-nylon suture 2 nodule of regular-nylon suture 3 soft nylon suture 4 nodule of soft nylon suture 5 graph paper a
6 Graph paper b
7 Measuring thread 8 Graph paper c
9 Graph paper d
10 Thread measurement sheet 11 Double-sided adhesive sheet a
12 Double-sided adhesive sheet b
13 Double-sided adhesive sheet c
14 Double-sided adhesive sheet d

Claims (2)

  A soft nylon suture adapted for suture in the oral region, which is a yarn used for post-operative suture in the oral region, wherein nylon 6 and nylon 66 are copolymerized.   2. The soft nylon suture adapted for suturing an oral region according to claim 1, wherein the suture end is made smaller by condensing the suture nodule into a small size.

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