JP2013126482A - Spacer fixing thread, and spacer with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer fixing thread which can easily and reliably perform the operation for fixing a spacer to a bone and does not adversely affect a living body, and to provide the spacer with the spacer fixing thread which can facilitate the operation for secure a gap between bones.SOLUTION: The spacer fixing thread is used for fixing the spacer to the bones while the spacer is being inserted into the gap between the bones. The spacer fixing thread comprises a braided thread and a hard bar-like core material disposed in at least one end of the braided thread along in a longitudinal direction. The spacer with the spacer fixing thread is configured so that the spacer fixing thread is inserted into a through-hole.

Description

  The present invention relates to a spacer fixing thread used when fixing a spacer to a bone, and a spacer provided with the spacer fixing thread.

  As a treatment for cervical spondylotic myelopathy, posterior longitudinal ligament ossification, yellow ligament ossification, intervertebral disc herniation and the like, a median longitudinal split cervical vertebral laminoplasty is performed.

  In midline longitudinal split laminoplasty, the midline (center) of the vertebral arch or spinous process is cut, and the vertebral arches on both sides are opened like hinges with the midline as the boundary. To enlarge. At this time, a spacer is inserted into a gap opened by cutting a vertebral arch or spinous process.

  For example, a spacer having a substantially trapezoidal shape in plan view is used by being inserted into the gap such that the narrow portion is on the spinal canal (vertebral foramen) side.

  In order to prevent the spacer from detaching from the vertebral arch or spinous process, a suture thread is inserted into the through-hole formed in the vertebral arch or spinous process and the through-hole formed in the spacer, and the spacer is tightened. (See, for example, Japanese Patent Laid-Open No. 2007-082826 (Patent Document 1)). The spacer is usually fixed by using a plurality of sutures, but the operation of inserting these sutures through the through holes is extremely complicated, and improvement is desired.

  In "Orthopaedic Surgical Cruz (2nd revised edition)", Nanedo Co., Ltd., June 1, 2006, page 139 (Non-patent Document 1), a thread for fixing the spacer in cervical laminoplasty It is described that both ends of a thread are fixed with medical Aron Alpha (registered trademark) or bone wax when passing through a through hole provided in a spacer in advance. However, with such a method, it is difficult to obtain sufficient strength to be inserted into the through hole, and although medical Aron Alpha (registered trademark) or bone wax has relatively little adverse effect on the living body, the risk is reduced as much as possible. From this point of view, improvement is desired.

  Japanese Patent Application Laid-Open No. 2010-11929 (Patent Document 2) includes a suture made of a plurality of biocompatible materials, and two needle-like hard portions arranged at intervals in the longitudinal direction of the suture. A bone graft suturing device is disclosed, and it is described that the hard portion is formed by curing a part of the suture with a surgical needle or an adhesive. In Patent Document 2, by using this bone grafting suturing tool, when a suture thread is inserted through a through hole formed in a vertebral arch or a spinous process and a through hole formed in a spacer, the hard part is attached to the surgical needle. Instead, it can be used to guide the suture, which eliminates the need for a surgical needle and eliminates the inconvenience of the suture coming out of the surgical needle.

  However, in the bone graft suturing device described in Patent Document 2, the suture is hardened with an adhesive to form a hard portion, and thus a plurality of sutures cannot be easily separated. Therefore, when the spacer is tied and fixed with the suture thread inserted into the through-hole, it is necessary to cut the hard portion with scissors or the like to separate a plurality of suture threads. It is very complicated to perform such work during the operation, and when the cut hard part is lost, it is difficult to find this part and there is a risk of leaving it in the patient's body.

  Japanese Patent Application Laid-Open No. 2011-136091 (Patent Document 3) includes a suture made of a plurality of biocompatible materials, and the sutures are partially joined to each other at a position spaced in the longitudinal direction. Discloses a bone graft suturing device in which two joint portions are formed, and the joining is performed by heat-sealing a suture made of a thermoplastic resin. Further, it is described that the rigidity of the joint portion can be increased by partially intertwining the suture threads at the time of heat fusion.

  However, in the bone graft suturing device described in Patent Document 3, when the joint is formed so as to be separable by heat fusion, it is not possible to adjust the joint strength to such an extent that it can be separated only when necessary without being carelessly separated. Have difficulty. Further, if the joint portion is separated before being inserted into the through hole, there is an inconvenience that the joint portion cannot be joined again on the spot.

JP 2007-082826 JP 2010-11929 JP 2011-136091

“Orthopedic Surgical Cruz (2nd revised edition)”, Nanedo Co., Ltd., June 1, 2006, p. 139

  Therefore, an object of the present invention is to easily and reliably perform the operation of fixing the spacer to the bone, and to prevent the adverse effect on the living body, and the spacer fixing thread including the spacer fixing thread. It is an object of the present invention to provide a spacer with a spacer fixing thread that can easily perform an operation for securing a gap.

  As a result of diligent research in view of the above-mentioned object, the present inventors have made it easy to insert a suture into a through-hole provided in a spacer by inserting a metal wire into the end of a braided suture and providing a hard part. The present inventors have found that a plurality of suture threads can be detachably connected by bringing the end portions into close contact with each other, and arrived at the present invention.

That is, the present invention is a spacer fixing thread used to fix the spacer to the bone in a state where the spacer is inserted into the gap between the bones,
Braided yarn,
It is characterized by comprising a hard rod-like core material arranged along the longitudinal direction inside at least one end of the braided yarn.

  The core material is preferably a metal wire.

  The length of the core material is preferably 10 to 30 mm.

  The core material preferably has a diameter of 0.15 to 0.25 mm.

  The outer diameter of the braided yarn is preferably the same diameter over the entire length.

  Another spacer fixing yarn of the present invention is composed of at least two braided yarns having the core material at the end thereof, and each braided yarn is twisted and connected at the end portion. Features.

  The spacer with a thread for fixing a spacer of the present invention is used by being inserted into a gap between bones, and is characterized by being inserted through a through hole provided in the spacer.

  Since the spacer fixing thread according to the present invention has a hard rod-like core material at the end, the suture thread is inserted into the through hole formed in the vertebral arch or spinous process and the through hole formed in the spacer. It can be done easily.

  By using a metal wire or the like as the core material, it is possible to connect a plurality of yarns so as to be detachable and twist them again even if the two yarn ends are inadvertently separated. Thus, the two threads can be connected again.

  The spacer with a thread for fixing a spacer according to the present invention can reduce the burden on the operator because the thread is passed through the spacer in advance, and has a hard portion having a hard rod-like core material at at least one end of the thread. The thread can be easily inserted through a through hole formed in the vertebral arch or spinous process.

It is a schematic diagram which shows an example of the thread | yarn for spacer fixation of this invention. FIG. 2A is a partial cross-sectional view in the longitudinal direction schematically showing a hard portion of the spacer fixing yarn of the present invention, and FIG. 2B is a cross-sectional view perpendicular to the longitudinal direction. It is a schematic diagram which shows the other example of the thread | yarn for spacer fixation of this invention. It is a schematic diagram which shows another example of the spacer fixing thread | yarn of this invention. It is a schematic diagram which shows another example of the spacer fixing thread | yarn of this invention. It is a schematic diagram for demonstrating a median longitudinal split-type expansion laminoplasty. It is another schematic diagram for demonstrating a median longitudinal split-type expansion laminoplasty. FIG. 10 is still another schematic diagram for explaining a median longitudinal split-type laminoplasty. FIG. 10 is still another schematic diagram for explaining a median longitudinal split-type laminoplasty. It is a schematic diagram for demonstrating the method to fix a spacer. It is a perspective view which shows an example of the spacer with the thread | yarn for spacer fixation of this invention. It is a perspective view which shows another example of the spacer with a thread | yarn for spacer fixation of this invention.

[1] Median longitudinal split-type laminoplasty The spacer fixing thread and the spacer-attached spacer with the spacer fixing thread of the present invention are used, for example, in a median vertical split-type laminoplasty. A median longitudinal split-type laminoplasty will be described with reference to FIGS. 6 to 9, the upper side is the back side, and the lower side is the ventral side.

  As shown in FIG. 6, the vertebra 100 includes a vertebral body 110, a vertebral arch 120 that extends behind the vertebral body 110 (upper side in FIG. 6) and forms a spinal canal (vertebral foramen) 140, And a spinous process 130 protruding backward from the central portion.

  First, as shown in FIG. 7, the spinous process 130 is cut along the midline 200 using an air drill or the like, and the vertebral arch 120 is divided into two to form cut portions 130a and 130b. Further, grooves 121a and 121b are formed on the outer side of the root portion of the vertebral arch 120 using an air drill or the like. The grooves 121a and 121b have a depth enough to cut only the outer plate and not the inner plate. The portions where the grooves 121a and 121b are formed are hinge portions (hinges) 122a and 122b.

  Next, as shown in FIG. 8, the cut portions 130a and 130b are rotated about the hinge portions 122a and 122b, so that the cut portion of the spinous process 130 is expanded and a gap 150 is formed. Here, the inner side surface facing the gap 150 between the cutting portions 130a and 130b is shaped as necessary.

  Next, through holes 131a and 131b are formed in the cutting portions 130a and 130b. Thereafter, as shown in FIG. 9, a substantially trapezoidal spacer S in a plan view is inserted into the gap 150. Thus, an enlarged vertebral arch 160 is formed by the spinous process 130 of the patient and the spacer S.

  During or after the operation, two spacer fixing threads 1 of the present invention are inserted into the through holes 131a and 131b of the spinous process 130 and the through hole S1 of the spacer S. Then, as will be described later, the spacer S is fixed to the cutting portions 130a and 130b using the first yarn 10a of the spacer fixing yarn 1 and another yarn 10b used as a reinforcing member.

  As the spacer S, those composed of bioceramics such as alumina, zirconia, calcium phosphate compound, etc. are preferably used. A porosity of 70% or less (particularly 30 to 50%) is suitable.

[2] Spacer fixing thread The spacer fixing thread of the present invention is used to fix the spacer to the bone in a state in which the spacer is inserted into the gap between the bones. It is characterized by comprising a hard rod-like core material arranged along the longitudinal direction inside at least one end of the braided yarn.

  As shown in FIGS. 1 and 2, the spacer fixing tool 1 of the present invention has a rod-shaped core material 12 such as a metal wire disposed at one end of a braided thread 10 along the longitudinal direction. Thus, a hard portion 11 having a predetermined length is formed at the end of the braided yarn 10. By forming the hard portion 11 at one end of the braided yarn 10 in this way, the operation of inserting the spacer fixing yarn 1 through the through holes 131a and 131b and the through hole S1 formed in the spacer is facilitated. It can be carried out.

  As shown in FIG. 3, the rod-shaped core material 12 may be disposed at both ends of the braided yarn 10 and the hard portions 11 may be provided on both sides of the braided yarn. By providing the hard part 11 at both ends of the spacer fixing tool 1, when the spacer fixing tool 1 is inserted into the through holes 131a, 131b and S1, an operation of inserting from either end can be performed. .

  As shown in FIG. 4, the spacer fixing tool 1 of the present invention forms a connecting portion 13 by twisting two braided yarns 10 a and 10 b each having the core material 12 at an end thereof. May be. Thus, by twisting and connecting the hard portions 11 of the two braided yarns 10a and 10b, the two braided yarns 10a and 10b can be inserted into the through holes 131a, 131b and S1 together. At the same time, the braided yarns 10a and 10b can be easily separated when necessary, and even when the braided yarns 10a and 10b are accidentally separated, they can be re-twisted by a simple operation. Since they can be connected, the work can be continued without exchanging for a substitute. Therefore, the operation of fixing the spacer S to the cutting portions 130a and 130b can be performed in a shorter time.

  In the embodiment shown in FIG. 4, the first braided yarn 10a and the second braided yarn 10b may have the same length or different lengths, but have substantially the same length. It is preferable. Further, it is preferable that the first braided yarn 10a and the second braided yarn 10b have substantially the same diameter. The diameters of the braided yarns 10a and 10b may be different depending on the purpose.

  In the embodiment shown in FIG. 4, when the spacer is fixed after the first braided yarn 10a and the second braided yarn 10b are separated by the connecting portion 13, the ends of the different braided yarns 10a and 10b are connected to each other. In order to avoid tying, the first braided yarn 10a and the second braided yarn 10b are preferably colored in different colors.

  As shown in FIG. 5, a spacer fixing tool 1 composed of two braided yarns 10a and 10b may be configured by providing connecting portions 13 at both ends of the braided yarns 10a and 10b. By providing the connecting portions 13 at both ends, when the spacer fixing tool 1 is inserted through the through holes 131a, 131b, and S1, an operation of inserting from either end can be performed.

  In the embodiment shown in FIGS. 4 and 5, an example in which the braided yarn is composed of two pieces is shown, but the braided yarn may be composed of three or more pieces according to the purpose.

(1) Core material As the core material 12, any material may be used as long as the hard portion 11 can be formed at the end of the braided yarn 10, but a material that does not adversely affect the living body is preferable. . The material of the core material 12 is preferably a metal such as titanium, titanium alloy, stainless steel, plastic such as nylon, polypropylene, polyethylene, Teflon (registered trademark), polyester, ceramic, etc., particularly preferably a metal wire, pure titanium Is most preferred. Pure titanium wire is suitable for the purpose of the present invention because it is excellent in corrosion resistance and strength and has no biological harm. As titanium, JIS type 1, JIS type 2, JIS type 3, JIS type 4 and the like can be used. For the purpose of the present invention, JIS type 1 or JIS type 2 having high flexibility is preferable. In particular, in the embodiment shown in FIGS. 4 and 5, it is preferable to use a metal wire as the core member 12 in order to form the connecting portion 13 by twisting the ends of a plurality of braided yarns 10.

  The bending strength in the longitudinal direction of the hard portion 11 only needs to have a strength that allows the spacer fixing thread 1 to be inserted into the through holes 131a and 131b and the through hole S1 of the spacer S, and was measured by the following test method. The strength of the core material 12 is preferably about 0.5 to 3.5 N, more preferably about 1 to 2.5 N, and most preferably about 1 to 2 N. If the bending strength of the core material 12 is set within the above range, the hard portion 11 has sufficiently high rigidity. For this reason, the said insertion operation can be performed more reliably and easily.

  The bending strength is measured by cutting the core material 12 into a predetermined length and setting it on a strength measuring machine (Shimadzu Corporation "EZ-Test") so that a part (about 10 mm) protrudes. This is done by pressing the protruding part almost perpendicularly to the base at 5 mm / min, and evaluating with the maximum strength until bending.

  The bending strength in the longitudinal direction of the braided yarn 10 measured by the same method, that is, the bending strength of the portion where the core material 12 is not disposed is preferably about 0.02 to 0.1 N, about 0.025 to 0.09 N It is more preferable that Since the braided yarn 10 having such bending strength is relatively high in flexibility, it is easy to perform an operation of fixing the spacer S to the cut portions (bones) 130a and 130b of the spinous processes 130.

  The length L of the hard part 11 (that is, the length of the core material 12) L is not particularly limited, but is preferably about 5 to 50 mm, and more preferably about 10 to 30 mm. By setting the length of the hard part 11 within the above range, the hard part 11 can be reliably held with a finger or the like. If it is the said range, the length of the hard part 11 will not be too long, and insertion operation of the spacer fixing thread | yarn 1 to the through-holes 131a and 131b and the through-hole S1 can be performed easily. Further, since the core material is disposed only at the end of the braided yarn, the fastening operation can be performed without impairing the flexibility of the braided yarn.

  The thickness Dc of the core material 12 is not particularly limited, but is preferably about 0.05 to 1.0 mm, and more preferably 0.15 to 0.25 mm.

(2) Braided yarn A braided yarn is a single fiber constructed by knitting a plurality of finer monofilaments, and is more flexible than monofilaments, making spacer S easier and more accurate. There is an advantage that it can be tightened. The braided yarn may have a hollow inside, and a rod-shaped core material may be disposed in the hollow.

  The braided yarn 10 is not particularly limited, but is preferably mainly made of a polymer material. Among these, it is preferable to use a material having biocompatibility.

  Polymer materials include polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA) and other polyolefins, cyclic polyolefins, modified polyolefins, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide Polyamideimide, polycarbonate, poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene copolymer (AS resin) , Butadiene-styrene copolymer, polyoxymethylene, polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT), etc. Polyester, polyether, polyetherketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, fragrance Group polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, fluororesin, and the like, and these may be used in combination.

  Among these, polyester is preferable. By using polyester, relatively high flexibility can be imparted to the braided yarn 10, and the operation of fixing the spacer S is facilitated.

  The surface of the braided yarn 10 may be subjected to a surface treatment for making it difficult to slip when the spacer fixing yarn 1 is gripped with a finger or the like. Examples of the surface treatment include coating with a silicone resin.

  The length of the braided yarn 10 is not particularly limited, but is preferably about 30 to 100 cm, and more preferably about 50 to 80 cm.

  The diameter D of the braided yarn 10 is not particularly limited, but is preferably about 0.1 to 1.5 mm, and more preferably 0.2 to 0.8 mm. In the braided yarn 10, it is preferable that the end portion on which the rod-shaped core material 12 is disposed and the other portions have substantially the same diameter.

  The braided yarn can be knitted by an existing knitting machine. The rod-shaped core material 12 is inserted into the end portion of the braided yarn by a method of inserting the braided yarn into the interior after manufacturing the braided yarn or a method of inserting the braided yarn into the middle of the braided yarn. Can be arranged. In the former method, the core material can be arranged inside the braided yarn by pushing the rod-shaped core material in the axial direction of the braided yarn so as to unwind the plurality of monofilaments. The inside of the end portion of the braided yarn 10 may be knitted so as to be hollow in advance. In this case, the internal cavity of the braided thread 10 is preferably about the same as the thickness Dc of the core material 12.

[3] How to use spacer fixing tool As shown in FIG. 5, the spacer S is a spinous process 130 using the spacer fixing thread 1 provided with the connecting portions 13 at both ends of the two braided threads 10a and 10b. A method of fixing to the cutting portions 130a and 130b will be described with reference to FIG. FIG. 10 shows the stage between FIG. 8 and FIG. 9 for explaining the median longitudinal split-type laminoplasty.

(i) Hold one connecting portion 13 of the spacer fixing tool 1 with a finger or the like and insert it into the through hole S1 of the spacer S (not shown). With the spacer fixing tool 1 inserted into the through hole S1 of the spacer S, one connecting portion 13 of the spacer fixing tool 1 is opened in the through hole 131a formed in the cutting portion 130a, and the other connecting portion 13 is opened in the cutting portion 130b. The through hole 131b is inserted (see FIG. 10 (a)). At this time, since the connecting portion 13 has a certain length, it can be reliably gripped and can be reliably operated to be inserted through the through holes 131a, 131b and S1.

(ii) Pull both ends of the spacer fixing tool 1 in the direction of separating and insert the spacer S into the gap 150 (see FIG. 10 (b)).

(iii) The first braided yarn 10a and the second braided yarn 10b are pulled in opposite directions, and the first braided yarn 10a and the second braided yarn 10b are separated at the connecting portion 13 (FIG. 10). (See (c)). At this time, since the braided yarns 10a and 10b are joined by twisting the hard portions 11, the first braided yarn 10a and the second braided yarn 10b can be easily and quickly separated. . Note that the order of (ii) and (iii) may be reversed.

(iv) The spacer S is tied using the separated first braided thread 10a, and similarly the spacer S is tied using the second braided thread 10b. At this time, it is preferable that the first braided yarn 10a and the second braided yarn 10b are preliminarily colored in different colors so that different yarns are not mistakenly tied. Thereby, the spacer S can be fixed to the cutting parts 130a and 130b.

(v) The unnecessary portions of the first braided yarn 10a and the second braided yarn 10b are cut to complete the median longitudinal split-type laminoplasty (see FIG. 10 (d)).

  Unlike the present invention, for example, when a bone grafting suture tool in which a plurality of threads are firmly fixed to a surgical needle is used, each thread cannot be easily separated. It is necessary to cut the thread and remove the surgical needle to separate the plurality of threads. Such an operation is complicated, and since the surgical needle is thin and small, if the cut surgical needle is lost, it is difficult to find this part and there is a risk of leaving it in the patient's body.

  On the other hand, when the spacer fixing tool 1 of the present invention is used, since the two threads can be easily separated without cutting the thread, the operation is easy and the safety of the operation is improved. Rise.

  In the present embodiment, the connecting portions 13 are provided at both ends of the braided yarn 10, but only the ease of operation of inserting the braided yarn 10 into the through holes 131a, 131b and S1. In consideration, the connecting portion 13 may be provided only at one end of the braided yarn 10.

[4] Spacer with spacer fixing thread 1S Spacer fixing thread spacer 1S has spacers S having through holes, as shown in FIG. 11, on both ends of two braided threads 10a and 10b as shown in FIG. A spacer fixing thread 1 having a connecting part 13 provided in the part is inserted through the through hole.

  In this example, there are two spacer fixing yarns 1 inserted through the through-holes. However, depending on the purpose, the spacer fixing yarns 1 may be composed of three or more yarns. In this case, for example, when the spacer is fixed to the bone with two threads and the remaining thread is used to fix the detached spinous process in the original position when the spinous process is separated from the vertebral arch. When the ligament is separated from the spinous process, the separated ligament can be used for fixing to the spinous process.

  Instead of forming two spacer fixing yarns 1 having hard portions 11 at both ends, a connecting portion 13 is provided at one end of two braided yarns 10a and 10b as shown in FIG. Spacer fixing thread 1S may be configured using spacer fixing thread 1, or spacer fixing thread 1 using two spacer fixing threads 1 having hard portions 11 at both ends as shown in FIG. A spacer with thread 1S may be configured (FIG. 12).

  The spacer fixing thread 1 is provided to the operator in a state of being inserted through the through hole S1 of the spacer S, for example. The spacer fixing thread 1 may be fixed to the spacer S using a biocompatible material or the like.

  By using the spacer with the spacer fixing thread, the operation of inserting the spacer fixing thread 1 into the through hole S1 of the spacer S can be omitted at the operation site, so that the operation time can be shortened. The burden on the patient and patient.

  As mentioned above, although the spacer fixing thread and the spacer with spacer fixing thread according to the present invention have been described based on the illustrated embodiments, the present invention is not limited to these embodiments, and each configuration is the same. It can be replaced with any one that can function, or can be added with any configuration.

  The spacer shown in the above embodiment is a spacer used for a gap between bones formed by cutting a vertebra and a spinous process, that is, a spinous process spacer, but is formed by cutting a vertebra. It may be a spacer used for the gap between the bones, that is, a larch spacer. Furthermore, the spacer may be an intervertebral spacer used between vertebral bodies.

1 ... Spacer fixing thread
10 ... Braided yarn
10a, 10b ... Braided yarn
11 ... Hard part
12 ... Core
13 ... Connecting part
1S ・ ・ ・ Spacer with spacer fixing thread
S ・ ・ ・ Spacer
S1 ... through hole
100 ... vertebra
110 ... vertebral body
120 ...
121a, 121b ... groove
122a, 122b ・ ・ ・ Hinges
130 ・ ・ ・ Spinous process
130a, 130b ... cutting part
131a, 131b ... through hole
140 ... spinal canal
150 ... Gap
160 ... enlarged arch
200: Midline

Claims (7)

A spacer fixing thread used to fix the spacer to the bone with the spacer inserted in the gap between the bones,
Braided yarn,
A spacer fixing yarn comprising a hard rod-like core material disposed along the longitudinal direction inside at least one end of the braided yarn.   The spacer fixing yarn according to claim 1, wherein the core material is a metal wire.   The spacer fixing yarn according to claim 1 or 2, wherein the length of the core material is 10 to 30 mm.   The spacer fixing yarn according to any one of claims 1 to 3, wherein the core material has a diameter of 0.15 to 0.25 mm.   The spacer fixing yarn according to any one of claims 1 to 4, wherein an outer diameter of the braided yarn is the same throughout the entire length.   The spacer fixing yarn according to any one of claims 1 to 5, comprising at least two braided yarns having the core material at an end thereof, wherein each braided yarn is twisted and connected at the end portion. A spacer fixing thread characterized by that.   A spacer inserted into a gap between bones and having a through hole, wherein the spacer fixing thread according to any one of claims 1 to 6 is inserted into the through hole. Spacer with thread.

Images