JP2017099556A - Tooth row correction wire and tooth row correction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tooth row correction wire which can use a prior metal arch wire as it is, excellent in economical efficiency, which has small friction coefficient and excellent in wear resistance, corrosion resistance and aesthetic property, and which is also used for an article which uses a metal wire such as a retainer or a wire clasp, and a tooth row correction method using the same.SOLUTION: A tooth row correction wire 10 of the invention comprises a resin pipe 12 and a metal wire 11 inserted into the resin pipe, and the tooth row correction wire is fixed to a bracket 20 disposed on teeth, for being used for tooth row correction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a linear orthodontic wire using metal characteristics such as a metal archwire and an orthodontic method using the same.

  Orthodontic correction is performed by, for example, ligating an archwire to brackets mounted in a row on the surface of a tooth. In such orthodontic treatment, orthodontic treatment is performed by moving and twisting teeth using an archwire made of stainless steel or nickel-titanium alloy, and the contact surface between the archwire and the bracket is worn. And scratches are likely to occur. And since the stress distribution acting on the archwire becomes non-uniform due to the wear and scratches, the corrective treatment may be adversely affected. Therefore, the wear resistance and corrosion resistance without such adverse effects are excellent, and the friction coefficient is low. A small archwire has been proposed.

  For example, in Patent Document 1, in a coated component for an orthodontic appliance, the coated component includes a component member base made of stainless steel or a titanium alloy, and a coating covering at least a part of the component member base. A coated component is proposed wherein the coating comprises a nitride of a metal selected from the metal group consisting of titanium, zirconium and hafnium. The coating thickness of this component is preferably about 1 to 10 μm when the component is a bracket and 0.25 to 5 μm when the component is an archwire.

  In addition, since the archwire is used by being mounted on the tooth surface, it is required to have an excellent aesthetic property. In Patent Document 2, a biocompatible inorganic fiber and a thermoplastic resin are combined. A non-metallic orthodontic wire that is white, translucent and excellent in aesthetics has been proposed.

  On the other hand, Patent Document 3 proposes a paint-coated dental metal product obtained by applying a thermoplastic resin to a dental metal product such as a commonly used metal archwire. That is, for dental metal products such as orthodontic wires, orthodontic retainers, dental prosthetic bridges made of stainless steel, nickel-titanium alloys, etc., aromatic polyester resins, aliphatic polyester resins, polyamide resins, polycarbonate resins and A paint-coated dental metal product to which a paint containing at least one kind of thermoplastic resin selected from the group consisting of modified polyolefin resins is applied has been proposed. This paint-coated dental metal product has a coating film thickness of 35 μm or less and is considered to be white, crown color, or gingival color, and is said to be excellent in aesthetics.

  Patent Document 4 proposes a dental article having a protective fluoropolymer layer. That is, a dental article comprising a non-elastomeric substrate having at least one layer containing a fluoropolymer disposed thereon, wherein the fluoropolymer is a partially fluorinated polymer, and further: the fluoropolymer comprises fluorine. Said dental article is proposed containing at least 40% by weight; at least 50% of all fluorine atoms present in the fluoropolymer in the main chain of the fluoropolymer. In this dental article, non-elastomeric dental articles generally include metals, ceramics, and relatively inflexible organic polymer materials, with examples of suitable metals being stainless steel alloys, titanium alloys, and the like. Further, the dental article is assumed to be a bracket, a buccal tube, an archwire, a sheath, a retainer, an arch enlargement device, a class II correction device, a class III correction device, a face bow, or a button.

Special Publication 2006-501031 Publication Japanese Unexamined Patent Publication No. 2-9-294749 JP 2012-210378 A Special table 2008-520667 gazette

  The archwire must have the required rigidity, wear resistance and corrosion resistance in terms of its function, but the non-metallic orthodontic wire described in Patent Document 2 has a problem in mechanical strength such as rigidity. is there. On the other hand, from the viewpoint of aesthetics, the component member having the nitride film described in Patent Document 1 has a problem that it is difficult to exhibit the same color as that of the tooth, but the paint-coated dental described in Patent Document 3 The metal product for use or the dental article described in Patent Document 4 has few such problems.

  However, it is not always easy to uniformly form a required nitride film or paint film on a circular or square archwire with a cross section, and there is a risk of peeling due to the action of tensile force or torsional force, and durability There's a problem. Further, there is a demand for a material that is more excellent in moldability and economy than those having a nitride film or a paint film.

  In view of such a conventional problem, the present invention can use a conventional metal archwire as it is, is excellent in economic efficiency, has a small friction coefficient, and is excellent in wear resistance, corrosion resistance, and aesthetics. An object of the present invention is to provide an orthodontic wire and an orthodontic method using the same. It is another object of the present invention to provide an orthodontic wire that can be used not only for an arch wire but also for an article that uses a metal wire such as a retainer or a wire clasp, and an orthodontic method using the same.

  The orthodontic wire according to the present invention is fixed to a bracket disposed on a tooth and used for orthodontic treatment, and includes a resin pipe and a metal wire inserted therethrough.

  In the above invention, the resin pipe can have a white color, and is preferably made of a polyether ether ketone (PEEK) resin.

  The orthodontic method according to the present invention is a method of using the orthodontic wire as an arch wire, a retainer or a wire clasp.

  Moreover, orthodontic correction can be performed efficiently by using the orthodontic wire. That is, orthodontic can be efficiently performed using a resin pipe having a predetermined outer diameter and inner diameter and a metal wire set in which a metal wire inserted into the pipe has a plurality of outer diameters. it can.

  Since the orthodontic wire according to the present invention has a small frictional force against the bracket, in particular a small dynamic frictional force and a stable size, the stress distribution during correction can be made uniform. And when used as a retainer or a wire clasp, it is easy to detach and handle. Further, the orthodontic wire can use a conventional arch wire, and is excellent in economic efficiency. By using such an orthodontic wire, orthodontics can be performed efficiently.

It is a schematic diagram which shows a part (a) of the orthodontic wire which concerns on this invention, and shows what (b) is used as a retainer. It is explanatory drawing of the wire for orthodontics based on this invention with which it uses for orthodontics. It is explanatory drawing of the frictional force measurement test which measures the frictional force when pulling out the orthodontic wire fixed to the bracket. It is a graph which shows the result of the frictional force measurement test of the orthodontic wire which concerns on this invention. It is a graph which shows the result of the frictional force measurement test of a commercially available arch wire.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows an orthodontic wire according to the present invention. As shown in FIG. 1 (a), an orthodontic wire 10 according to the present invention includes a resin pipe 12 and a metal wire 11 inserted through the resin pipe 12. As shown in FIG. It is fixed to the bracket 20 disposed on the teeth and used for orthodontics. The orthodontic wire 10 can be supplied as a long object in which the resin pipe 12 and the metal wire 11 are integrated. Also, the long resin pipe 12 and the long metal wire 11 are supplied separately, and when used, the metal wire 11 can be inserted into the resin pipe 12 and used integrally. it can. For example, when an orthodontic wire is used as a retainer, as shown in FIG. 1B, a metal wire 11 is processed into a required shape in advance and then inserted into a resin pipe 12 to be used integrally. be able to.

  As the metal wire 11, a commercially available metal arch wire can be used. For example, a stainless steel arch wire or a nickel-titanium alloy arch wire having a nominal diameter of 0.012φ, 0.014φ, or 0.016 square (inch) can be used. In addition, the metal wire 11 can have a rectangular cross section, and the shape of the cross section is not limited.

  The resin pipe 12 preferably has a cylindrical shape with a circular cross section. Such a shape is excellent in economy and can be used for the metal wire 11 having various cross-sectional shapes. For example, the resin pipe 12 may have an outer diameter × an inner diameter of 0.022 × 0.018 (inch) (with a wall thickness of about 100 μm).

  In addition, the resin pipe 12 is excellent in wear resistance and corrosion resistance, has safety withstanding long-term use in the oral cavity, and as a component of orthodontic wire, stainless steel arch wire and Good compatibility with nickel-titanium alloy archwires is required. As such a resin, a polyether ether ketone resin (PEEK resin) is preferable. This resin is excellent in mechanical strength such as abrasion resistance and creep resistance, and is excellent in steam resistance, chemical resistance and radiation resistance that do not cause hydrolysis even under high temperature steam, and orthodontic according to the present invention. It is preferable as the resin pipe 12 of the wire 10 for use. As this PEEK-based resin, a resin obtained by alloying a polyether ether ketone resin with another resin can be used, and for example, a fluororesin can be used as the other resin.

  As the orthodontic wire according to the present invention, a wire having a shape and a size that allows the metal wire 11 to be inserted into the resin pipe 12 and can maintain a uniform stress distribution during the correction is used. For example, a resin pipe 12 having an outer diameter × inner diameter of 0.022 × 0.018 (inch) described below, and a metal made of a commercially available nickel-titanium alloy archwire with an outer diameter of 0.014, 0.016, or 0.018 (inch) Wire 11 can be used. Therefore, by preparing in advance a set of a plurality of metal wires 11 of different sizes on a resin pipe 12 of a predetermined size, it is possible to perform an efficient treatment according to the degree of progress of orthodontics.

  As described above, the orthodontic wire according to the present invention can be used as it is in a portion where a conventional metal arch wire, retainer or wire clasp is used. Then, treatment and operation can be performed almost equivalently to a conventional archwire, retainer, or wire clasp.

  The orthodontic wire according to the present invention was fixed to a bracket, and a friction force measurement test was performed to measure the friction force when the orthodontic wire was pulled out. For comparison, a similar friction force measurement test was performed on a commercially available archwire. The frictional force measurement test was performed using the test apparatus shown in FIG. That is, in FIG. 3, the orthodontic wire 10 is fixed to the bracket 20 fixed to the abutment 25 with a ligature wire 23, and the end of the orthodontic wire 10 is a digital force gauge DS2 manufactured by Imada Corporation. It is gripped by the gauge clamp 30. Then, the pulling force when pulling the orthodontic wire 10 in this state in the direction of the arrow was measured (sliding method). The drawing speed was 10 mm / min.

  The orthodontic wire 10 has a resin pipe 12 made of PEEK resin (VESTAKEEP-J ZV7801 manufactured by Daicel-Evonik Co., Ltd.) with an outer diameter x inner diameter of 0.022 x 0.018 (inch), and a nominal outer diameter of 0.014. A combination of 0.016 or 0.018 (inch) of a metal wire 11 made of a commercially available nickel-titanium alloy archwire was used. In the comparative example, after fixing the arch wire similar to the metal wire 11 to the bracket 20 with the ligature wire 23, artificial saliva made by Teijin Pharma Ltd. is sprayed, and the pulling force is measured by the same method as the above invention example did. In addition, the ligation of the orthodontic wire 10 to the bracket 20 was performed in the same manner as a normal treatment.

  The frictional force measurement test was performed three times for each sample, and the results of employing the middle data are shown in FIGS. FIG. 4 shows the test results of the inventive example, and FIG. 5 shows the test results of the comparative example. 4 and 5, the horizontal axis indicates the drawing length, and the vertical axis indicates the drawing force. When the outer diameter of the metal wire 11 or arch wire is 0.014 inch (a), 0.016 inch (b), 0.018 inch. In the case of (c). In the example of the invention, as shown in FIG. 4, the static friction force (70 to 130 g) and the dynamic friction force (45 to 100 g) increase as the outer diameter of the metal wire 11 increases. This is considerably smaller than the comparative example described. In addition, the dynamic friction force has a substantially constant value, and it is easy to perform the treatment.

  On the other hand, in the case of the comparative example, as shown in FIG. 5, the static friction force varies between 205 and 300 g, and no relationship with the outer diameter of the archwire is seen. In addition, the dynamic friction force of the arch wire having an outer diameter of 0.016 inch is relatively stable (FIG. 5B), but the dynamic friction force of the arch wire having an outer diameter of 0.014 inch is very varied and vibrates. (FIG. 5A). In the case of such an archwire, the difficulty of treatment is expected, and it is understood that the stress distribution of the archwire is likely to be non-uniform during correction, which adversely affects the correction treatment.

10 Orthodontic wire
11 Metal wire
12 Plastic pipe
20 Bracket
23 Knotting wire
25 Abutment
30 gauge clamp

Claims (6)

  An orthodontic wire having a resin pipe and a metal wire inserted through the resin pipe, which is fixed to a bracket disposed on a tooth and used for orthodontics.   The orthodontic wire according to claim 1, wherein the resin pipe is white.   The orthodontic wire according to claim 1 or 2, wherein the resin pipe is made of a polyether ether ketone (PEEK) resin.   4. The orthodontic wire according to claim 3, wherein the polyether ether ketone resin is a resin obtained by alloying a polyether ether ketone resin and a fluororesin.   An orthodontic method using the orthodontic wire according to claim 1 as an arch wire, a retainer or a wire clasp.   An orthodontic method for performing orthodontic treatment using a resin pipe having a predetermined outer diameter and inner diameter and a metal wire set in which a metal wire inserted into the pipe has a plurality of outer diameters.

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