Orthodontic arch wire

Abstract

The orthodontic arch wire comprises an anterior tooth section and a pair of posterior tooth sections connected to the two ends of the anterior tooth section, the cross section of the anterior tooth section is in a square shape, the cross section of each posterior tooth section is in a circular shape, and the cross sectional area of the anterior tooth section and the cross sectional area of each posterior tooth section are both smaller than the cross sectional area of a bracket groove; the anterior tooth section is divided into a plurality of sub-sections, each sub-section is linear, and the extension direction of each sub-section is the extension direction of the corresponding bracket groove. The self-ligating bracket has the effect of reducing the turning or jumping of the arch wire in the groove when the self-ligating bracket is used.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an orthodontic archwire. BACKGROUND

[0002] There are generally four stages in lingual treatment, namely, alignment, closing gap, fine adjustment and retention. The alignment is the initial stage of tooth treatment, and the teeth are arranged in the early stage. The twisted teeth and crowded teeth are arranged in order to prepare for the subsequent closing gap stage. Therefore, the alignment stage is particularly important for tooth treatment. Currently, there are two types of brackets for lingual treatment, one is a ligation bracket, and the other is a self-locking bracket. After the archwire is installed, the ligation bracket needs to be bound with a ligation ring or a ligation wire to produce a treatment effect. The self-locking bracket only needs to be closed after the archwire is installed, and does not need to be bound with a ligation wire. The treatment process uses a series of archwires, and the principle is from small size to large size, and from circular cross-section to square cross-section. The size of the thickest square wire is also smaller than the size of the groove. Therefore, there is a gap between the archwires and the grooves of different sizes, and the friction between the archwires and the grooves required in different stages is different.

[0003] The existing alignment generally uses round wires, which requires small friction. For the ligation bracket, the archwire is well limited in the bracket groove and does not turn or jump in the groove after being bound with a ligation wire. For the self-locking bracket, the archwire is also well limited in the bracket groove after the lock cover is closed. However, the archwire is not completely limited, and the self-locking bracket does not have a pressing force on the archwire. There is a large gap between the archwire and the groove, and the archwire may turn or jump in the groove. Therefore, the effect of the alignment is not so fast. SUMMARY

[0004] In order to reduce the turning or jumping of the archwire in the groove when using the self-locking bracket, the present application provides an orthodontic archwire.

[0005] The orthodontic archwire provided by the present application adopts the following technical scheme:

[0006] An orthodontic archwire includes a front tooth segment and a pair of back tooth segments connected to both ends of the front tooth segment. The cross-section of the front tooth segment is square, and the cross-section of the back tooth segment is circular. The cross-sectional area of the front tooth segment and the cross-sectional area of the back tooth segment are both smaller than the cross-sectional area of the bracket groove. The front tooth segment is divided into a plurality of sub-segments, each of which is linear. The extension direction of each sub-segment is the extension direction of the corresponding bracket groove.

[0007] By adopting the technical scheme, the front tooth section is set as a square shape, mainly to further establish the torque in the alignment process of the teeth, use small square arch wires, small friction, and do not need to be tied with ligation wires, the size of the square arch wire is larger than that of the circular arch wire and smaller than that of the slot, and the square arch wire will not be turned over or jump up in the slot like the circular arch wire; and the front tooth section is set as a straight sub-section at the position corresponding to each bracket slot, so that each sub-section is matched with the bracket slot, and the straight sub-section is more easily slid than the arc-shaped arch wire, which is beneficial to the alignment and leveling of the front teeth.

[0008] Preferably, the back tooth section is in a straight line.

[0009] By adopting the technical scheme, the back tooth section is set as a straight line because when the front teeth are corrected to the ideal state in the correction process, the arch wire will also be restored to the ideal state, and the back tooth section of the arch wire will move to the back tooth direction, and the straight line type of the back tooth arch wire is beneficial to the movement of the arch wire in the back tooth bracket slot, and the bending or other shapes of the arch wire may be blocked by the edge of the slot, which affects the correction effect.

[0010] Preferably, the front tooth section and the back tooth section are integrally formed.

[0011] By adopting the technical scheme, the overall strength is higher, and the disconnection of the connection between the front tooth section and the back tooth section is reduced.

[0012] Preferably, the front tooth section and the back tooth section are both nickel-titanium alloy arch wires.

[0013] By adopting the technical scheme, the shape memory effect, super-elasticity, corrosion resistance and other characteristics of the nickel-titanium alloy material make the orthodontic effect better.

[0014] Preferably, one side of the front tooth section is provided with a mark point at the middle position.

[0015] By adopting the technical scheme, the direction of the arch wire can be distinguished, which is convenient and accurate for use, and the practicability is improved.

[0016] In summary, the present application has at least one of the following beneficial technical effects:

[0017] 1. The front tooth section is set as a square shape, mainly to further establish the torque in the alignment process of the teeth, use small square arch wires, small friction, and do not need to be tied with ligation wires, the size of the square arch wire is larger than that of the circular arch wire and smaller than that of the slot, and the square arch wire will not be turned over or jump up in the slot like the circular arch wire; and the front tooth section is set as a straight sub-section at the position corresponding to each bracket slot, so that each sub-section is matched with the bracket slot, and the straight sub-section is more easily slid than the arc-shaped arch wire, which is beneficial to the alignment and leveling of the front teeth;

[0018] 2. The posterior tooth section is set to be linear because the anterior tooth will be restored to the ideal state during the correction process, and the arch wire will also be restored to the ideal state, and the arch wire posterior tooth section will move to the posterior tooth direction, and the posterior tooth arch wire linear type facilitates the movement of the arch wire in the posterior tooth bracket slot groove, and if the arch wire is bent or has other shapes, it may be blocked by the slot groove edge and affect the correction effect;

[0019] 3. The setting of the mark point distinguishes the direction of the arch wire, facilitates more convenient and accurate placement in the bracket slot groove during use, and improves the practicality. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0021] Figure 2 is a schematic diagram of the state when the arch wire of the embodiment of the present application is installed in the bracket.

[0022] Figure 3 is a side view of the anterior tooth section installed in the bracket of the embodiment of the present application.

[0023] Figure 4 is a side view of the posterior tooth section installed in the bracket of the embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, anterior tooth section; 11, sub-section; 12, mark point; 2, posterior tooth section; 101, bracket slot groove. DETAILED DESCRIPTION

[0026] The following will be described in detail in combination with the accompanying Figures 1-4 The present application will be further described in detail.

[0027] The embodiment of the present application discloses an orthodontic arch wire. Referring to Figure 1 and Figure 2 , the orthodontic arch wire comprises an anterior tooth section 1 and a pair of posterior tooth sections 2, and the anterior tooth section 1 and the posterior tooth section 2 are both nickel-titanium alloy arch wires, two posterior tooth sections 2 are respectively connected to the positions of the two ends of the anterior tooth section 1, the anterior tooth section 1 is used for clamping into the bracket slot groove 101 in the anterior tooth range, and the posterior tooth section 2 is used for clamping into the bracket slot groove 101 in the posterior tooth range; the cross section of the anterior tooth section 1 is square (referring to Figure 3 ), and the cross section of the posterior tooth section 2 is circular (referring to Figure 4), the cross-sectional area of the anterior tooth section 1 and the cross-sectional area of the posterior tooth section 2 are both smaller than the cross-sectional area of the bracket slot 101, the cross-sectional area of the anterior tooth section 1 is smaller than the cross-sectional area of the posterior tooth section 2, and the gap between the anterior tooth section 1 side and the bracket slot 101 side ranges from 0.001 to 0.006 inches; the anterior tooth section 1 is divided into a plurality of subsections 11, each of which is linear, i.e., the anterior tooth section 1 is segmented, and the extension direction of each subsection 11 is the extension direction of the corresponding bracket slot 101; thereby achieving matching of each subsection 11 with the bracket slot 101, and the archwire is easier to slide compared to an arc-shaped archwire, which is beneficial to the alignment of the anterior teeth.

[0028] The anterior tooth section 1 and the posterior tooth section 2 are integrally formed, and in addition to obtaining the archwire by integral forming, the entire archwire in the form of the anterior tooth section 1 can be electrolytically polished. The square posterior tooth section 2 is immersed in an electrolyte, a current of 1 ampere is set, and the electrolysis time is two minutes. The operation can be repeated after measurement until the square archwire is electrolyzed into a circular shape. The square posterior tooth section 2 can also be obtained by manual polishing.

[0029] Referring to Figure 1 , the anterior tooth section 1 is provided with a mark 12 at the middle position of one side, so as to distinguish the direction of the archwire.

[0030] The implementation principle of the orthodontic archwire according to the embodiment of the application is as follows: first, the direction is distinguished by the mark 12, then each subsection 11 is clamped into the corresponding bracket slot 101 in the anterior tooth range, and the posterior tooth section 2 is clamped into the corresponding bracket slot 101 in the posterior tooth range; in the alignment process, the archwire is easier to slide compared to an arc-shaped archwire, which is beneficial to the alignment of the anterior teeth.

[0031] The above are preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the application should be covered within the protection scope of the application.

Claims

1. An orthodontic archwire, characterized in that, It includes an anterior segment (1) and a pair of posterior segments (2) connected to both ends of the anterior segment (1). The anterior segment (1) has a square cross-section, and the posterior segment (2) has a circular cross-section. The cross-sectional area of ​​the anterior segment (1) and the cross-sectional area of ​​the posterior segment (2) are both smaller than the cross-sectional area of ​​the bracket groove (101). The anterior segment (1) is divided into several sub-segments (11), each of which is straight and extends in the direction of the corresponding bracket groove (101).

2. The orthodontic archwire according to claim 1, characterized in that, The posterior tooth segment (2) is straight.

3. The orthodontic archwire according to claim 1, characterized in that, The anterior tooth segment (1) and the posterior tooth segment (2) are integrally formed.

4. The orthodontic archwire according to claim 1, characterized in that, Both the anterior segment (1) and the posterior segment (2) are connected by nickel-titanium alloy archwires.

5. An orthodontic archwire according to claim 1, characterized in that, A marker (12) is provided at the middle position of one side of the anterior tooth segment (1).

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