Orthodontic wire and orthodontic wire pack

Abstract

An orthodontic wire comprising two or more wires and a stop. The stop is a tubular member through which all of the two or more wires pass. The wires inside the stop are always in contact with the inner surface of the stop, and the adjacent wires are also in contact with each other.

Description

Orthodontic wires, orthodontic wire packs

[0001] This disclosure relates to orthodontic wires (archwires) used in orthodontic treatment.

[0002] For example, Patent Document 1 discloses a device in which a stop (sometimes called a "crimpable stop") is attached to a single orthodontic wire. The stop restricts the mesiodistal movement of the orthodontic wire. By providing a device in which a stop is positioned on an orthodontic wire in this way, the inconvenience of the practitioner having to thread the orthodontic wire through the stop on-site can be avoided. Patent Document 1 further describes making the shape of the inside and outside of the stop more likely to catch on the orthodontic wire in order to prevent the stop from falling off. Other means include applying wax or light-curing resin.

[0003] WO2014 / 158871

[0004] Shaping the stop, as with conventional methods, or using other conventional techniques was cumbersome. Furthermore, when performing procedures using two or more orthodontic wires (tandem wires), using conventional stop methods became even more complicated.

[0005] Therefore, the object of this disclosure is to provide an orthodontic wire in which a simple form of stop is arranged on multiple orthodontic wires.

[0006] This application discloses an orthodontic wire having a wire and a stop, wherein the wire is provided with two or more wires, the stop is a tubular member through which all of the two or more wires pass, the wires are always in contact with the inner surface of the stop inside the stop, and adjacent wires are also in contact with each other.

[0007] In a cross-section perpendicular to the pipe axis of the stop, the area of ​​the cavity in the pipe is A. Ｓ The total cross-sectional area of ​​the wires present here is A Ｗ In that case, A Ｗ / A Ｓ The ratio represented by may be 0.3 or more and 0.9 or less.

[0008] The wire and stop may be configured to satisfy the above relationship in more than 50% of the axial direction of the stop.

[0009] This application discloses an orthodontic wire pack comprising a container and the above-mentioned orthodontic wire stored in the container.

[0010] According to this disclosure, even in a simple stop configuration, it is possible to hold multiple wires and appropriately suppress the movement of the wires in the mesiocentral direction.

[0011] Figure 1 is an external view of the orthodontic wire 10. Figure 2 is a cross-section along A-A. Figure 3 is a cross-section along B-B. Figure 4 is a cross-section of another example with a different wire cross-sectional shape. Figure 5 is a cross-section of another example with a different wire cross-sectional shape. Figure 6 is a cross-section of another example with a different stop cross-sectional shape. Figure 7 is an example with two stops. Figure 8 is a diagram illustrating the orthodontic wire pack 20. Figure 9 is a diagram showing another example of the orthodontic wire pack 20.

[0012] The effects and benefits of this disclosure described above will be evident from the following forms, but this disclosure is not limited to these forms.

[0013] 1. Structure of Orthodontic Wire Figure 1 shows the external appearance of an orthodontic wire 10 in one configuration. As can be seen from Figure 1, the orthodontic wire 10 comprises multiple (two in this configuration) wires 11 and a stop 12. Figure 2 shows the A-A cross section of Figure 1. Figure 3 shows the B-B cross section of Figure 2. Figures 4 to 6 show cross sections from the same viewpoint as Figure 2 for other examples.

[0014] [Wire] A known wire 11 can be used. The wire 11 is a linear member, and its cross-section may be circular as in this embodiment, or square (with rounded corners (the corners are arc-shaped)) as shown in Figure 4, or elliptical. It may also be a combination of a circular and a square cross-section as shown in Figure 5. Furthermore, the wire 11 may be a single wire, or a stranded wire made by twisting together multiple thin wires.

[0015] The material of the wire 11 can be any known material and is not particularly limited. Examples include nickel-titanium alloy (other components such as copper, cobalt, niobium, platinum, etc.), stainless steel, titanium-based nickel-free alloy (other components such as molybdenum, zinc, tin, aluminum, chromium, vanadium, niobium, etc.), copper-zinc-aluminum alloy, cobalt-chromium-nickel-molybdenum alloy, etc. It may also be made of a material other than metal. Examples of materials other than metals include polymers, plastics, ceramics, etc. These materials may be used individually, or in combination with the above-mentioned metals.

[0016] In this disclosure, two or more wires 11 are bundled together by a stop 12. Each of the bundled wires 11 may have the same shape (cross-sectional shape, cross-sectional area, length) and material, but at least one of the shape and material may be different from each other. Among these, possible combinations of diameters (inches) of the two wires 11 include 0.012 / 0.012, 0.016 / 0.010, 0.016 / 0.012, 0.016 / 0.013, 0.016 / 0.014, 0.016 / 0.016, 0.014 / 0.010, 0.014 / 0.013, 0.018 / 0.012, 0.018 / 0.013, 0.018 / 0.014, 0.018 / 0.016, and 0.018 / 0.018. Examples of combinations of diameters (inches) for the three wires 11 include 0.014 / 0.018 / 0.010.

[0017] [Stop] The stop 12 bundles multiple wires 11 and functions as a crimpable stop. The stop 12 in this embodiment is tubular and may be a circular tube as shown in Figure 2, a square tube as shown in Figure 6, or a tubular shape of any other kind. In the case of the tubular stop 12 in this embodiment, it is preferable that its inner surface is flat in the direction of its axial direction, as shown in Figure 3, and is a so-called straight tube. As will be described later, by having a predetermined morphological relationship between the multiple wires 11 and the stop 12, even a stop with a simple shape such as a straight tube will function as a stop. The size of the stop 12 in the axial direction can be approximately 0.5 mm to 3 mm. The "axial direction" is, as is well known, the direction in which the cavity of the tube extends. However, the inner surface of the stop 12 may be formed rough in order to increase friction with the wires 11.

[0018] The material of stop 12 can be a known material.

[0019] Stop 12 may be positioned as a single unit, as in the example in Figure 1, or as two or more units at different positions, as in Figure 7. However, it is preferable that at least one stop 12 is positioned at the center of the wire 11 in the longitudinal direction (the most protruding part of the curved wire), as in Figure 1.

[0020] [Relationship between wire and stop] The wire 11 and stop 12 preferably satisfy either <1> or <2> below, and more preferably both <1> and <2>. Note that the wire 11 and stop 12 are configured to be difficult to move relative to each other, but are able to move relative to each other. That is, the wire 11 and stop 12 are not joined together. <1> In this embodiment, in the cross-sections of Figures 2, 4, 5, and 6, a part of the wire 11 is always in contact with the stop 12. In addition, adjacent wires 11 are in contact with each other. This restricts the movement of the multiple wires 11 and restricts the movement of the multiple wires 11 in the mesiocentrifugal direction.

[0021] <2> The inner area of the cavity (in the state where the wire 11 is not arranged) in the cross-section (Figs. 2, 4, 5, 6) orthogonal to the axial direction of the stop 12 is defined as A Ｓ (mm ２ ), and the total cross-sectional area of the wire 11 in the said cross-section is defined as A Ｗ (mm ２ ). When the ratio represented by A Ｗ / A Ｓ is 0.3 or more and 0.9 or less, preferably 0.4 or more and less than 0.6, this makes it possible to more surely achieve the above-described effect.

[0022] <3> Regarding <1> and <2> above, when the stop 12 is a straight tube, the relationship between the wire 11 and the stop 12 in <1> and <2> is preferably satisfied over the entire axial length of the stop 12, but it suffices if it is satisfied in at least 80% of the range. On the other hand, even when the stop is not a straight tube, it is preferable that at least one of the relationships in <1> and <2> is satisfied in a range of 50% or more in the axial direction of the stop. More preferably, at least one of the relationships in <1> and <2> is satisfied in a range of 70% or more.

[0023] 2. Another aspect As shown in Figs. 8 and 9, the dental correction wire 10 may be a dental correction wire pack 20 housed in a transparent bag body 21 (container). In the dental correction wire pack 20, the bag body 21 is joined such that two sheets on the front and back are wound around at the joint 22 hatched in Fig. 8, and the dental correction wire 10 is housed in the space inside the joint 22. Figs. 8 and 9 show different orientations of the dental correction wire 10 (the orientation where the stop 12 is arranged) with respect to the orientation of the bag body 21. Either orientation may be used.

[0024] 10... Dental correction wire, 11... Wire, 12... Stop, 20... Dental correction wire pack, 21... Bag body

Claims

1. An orthodontic wire having wires and stops, wherein the wires consist of two or more, the stops are tubular members through which all of the two or more wires pass, and the wires are always in contact with the inner surface of the stops inside the stops, and adjacent wires are also in contact with each other.

2. In a cross-section perpendicular to the pipe axis of the stop, the area of ​​the cavity in the pipe is A. Ｓ The total cross-sectional area of ​​the wires present here is A Ｗ In that case, A Ｗ / A Ｓ The orthodontic wire according to claim 1, wherein the ratio represented by is 0.3 or more and 0.9 or less.

3. An orthodontic wire wherein, in the axial direction of the stop, the wire and the stop satisfy claim 1 or 2 for 50% or more of the length of the stop.

4. An orthodontic wire pack comprising a container and an orthodontic wire according to claim 1 or 2, stored in the container.

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