JP2011525825A - Asymmetric automatic ligation bracket for orthodontics - Google Patents

Abstract

The present invention relates to an orthodontic automatic ligation bracket or latch (1), which is formed from a rigid monoblock component and can be rigidly fixed to one surface of a single tooth of a human being with appropriate tension. Alternatively, it is of a type that can be connected to a plurality of other brackets by an archwire (2), and has a bottom (3) having a fixing surface (4) that can be fixed to one tooth surface, and a groove that can accommodate the archwire A mold sheet or slot (5), an opening (6) provided in the bracket front (7) opposite the fixing surface (4) to provide access to the slot (5), and the slot Fastening means for the archwire in the groove, arranged in the shape of at least one pawl, preferably two pawls (8a, 8b), arranged facing (5) and adjacent to the opening (6) The bracket (1) is Characterized in that in a direction substantially perpendicular to the fixed surface (4) and front (7) is asymmetric with respect to the central axis (9).
[Selection] Figure 1

Description

  The present invention relates to the field of orthodontics.

  The present invention particularly relates to an asymmetric self-ligating latch (or bracket), an assembly including such an asymmetric self-ligating bracket and an archwire, and each rigidly fixed (strong) to one side of a single human tooth. Aiming for an orthodontic assembly comprising a plurality of self-ligating brackets that can be fixed) and wires or archwires connecting them with appropriate tension, wherein at least one bracket is an asymmetrical auto-ligating bracket Yes.

  In orthodontics, latches (generally called “brackets”) for correcting the alignment of human teeth are known. These brackets are rigidly fixed to the inner or outer surface of the human tooth and are made of Ni-Ti (nickel-titanium) type metal wire or flexible material suitable for its function and application (generally "arch wire"). )) With appropriate tension.

Such brackets are implemented in various embodiments. In one of these embodiments, the bracket is a rigid (rigid) monoblock component (integrated component),
-A bottom having a fixing surface which can be fixed to one tooth surface;
A grooved sheet (commonly referred to as a “slot”) that can accommodate an archwire;
-An opening in the front of the bracket opposite to the fixing surface, which forms a passage allowing access to the slot;
-Means for fastening the archwire to the groove.

  WO 2005/048868 (prior art document 1) describes such a bracket, where the slot has an overall shape corresponding to two opposite right trapezoids joined by the smaller bottom. The passage opening has a channel shape with parallel edges having a linear profile over its entire length, and the fastening means has two triangular protrusions adjacent to the passage opening The protrusions are respectively arranged on one side and the opposite side of the opening, and each protrusion extends over the slot over half the length of the opening. In this embodiment, a shape memory archwire is coupled to the bracket.

  The automatic ligation bracket described in WO 2006/097657 (prior art document 2) has an overall shape corresponding to two quasi-rectangular trapezoids facing each other whose slots are joined by the smaller bottom. However, the passage opening has a channel shape with parallel edges, which is not straight over its entire length, but is fastened by bending the archwire as it is inserted into the sheet groove. The contour is shaped to allow the pawl to be bypassed, and the fastening means has the shape of two pawls adjacent to the opening in the passage, the pawl being opposite to one side of the opening Each pawl, and each pawl overhangs only a portion of the length of the opening at its end over the slot.

  In the above two embodiments, the bracket is symmetric with respect to an axis that is substantially orthogonal to the fixed surface and the front surface.

  U.S. Pat. No. 2,926,422 (A) (prior art document 3) describes a plurality of modified embodiments of a bracket, the bracket all consisting of two parts, the main part being the back of it. Are welded to a ring-shaped band configured to be arranged around the corresponding tooth. This construction limits the feasibility of orthodontic assemblies with such brackets because it is not possible to place two brackets on two adjacent teeth.

  U.S. Pat. No. 2,926,422 (A) describes both as having only a slight difference, with little or no problem with the symmetry or asymmetry of the bracket. The advantages are not revealed. In a modified embodiment where the bracket is asymmetric, the pawl completely covers the archwire, which is essential when the archwire has a circular cross section. On the other hand, the bracket must have sufficient dimensions in the lateral direction to allow the housing of the groove and opening, and the groove and opening have a lateral dimension at least equal to the lateral dimension of the archwire. Have As a result of this structure, not only the other points are the same, but also the travel distance of the archwire in the lateral direction to pass from the opening to the groove is lengthened, and the lateral dimension of the bracket is also increased in size To do.

  WO 02/089693 pamphlet (prior art document 4), US Pat. No. 5,857,850 (prior art document 5), and US Pat. No. 3,765,091 (prior art document 6) disclose an arc wire having a circular cross section. is doing. Such a shape can be kinked when the archwire is coupled to the bracket.

International Publication No. 2005/048868 Pamphlet International Publication No. 2006/097657 Pamphlet US Patent Application Publication No. 2,926,422 International Publication No. 02/089693 Pamphlet US Patent Application No. 5,857,850 US Patent Application Publication No. 3,765,091

  The present invention eliminates the inconveniences described above, and includes a bracket, an assembly including such a bracket and an archwire, and a plurality of automatic ligation brackets each capable of being rigidly fixed to one side of a human tooth, and The aim is to propose orthodontic assemblies with archwires that connect them with the appropriate tension, in which the brackets are self-ligating and asymmetrical, so that one human tooth While it can be fixed directly to the surface (by bonding) and two consecutive teeth can receive two continuous brackets, the archwire is not circular in its cross section, but square or By having an equivalent shape, it is prevented from twisting.

  In fact, the asymmetric bracket embodiment has been found to be advantageous for some cases. For example, for teeth in the upper abnormal position, it may be appropriate to use an asymmetric bracket with pawls located on the occlusal side, and the archwire is better retained.

For this reason, according to the first aspect of the present invention, a plurality of brackets each capable of being rigidly fixed to one side of a single tooth of a human and a wire or an archwire that couples the brackets with appropriate tension. We propose an automatic ligation bracket that forms part of the orthodontic assembly
A bottom having a fixed surface;
A grooved sheet or slot capable of accommodating an archwire that joins the bracket;
An opening provided in front of the fixed surface opposite the fixed surface to provide access to the slot;
A means for fastening the archwire to the groove, which is arranged facing the slot and is configured in the shape of at least one pawl adjacent to the opening;
A central axis in a direction substantially perpendicular to the fixed surface and the front surface, wherein the bracket is asymmetric with respect to the central axis;
A lateral direction at least approximately perpendicular to the central axis and parallel to the fixed surface;
With
The bracket is formed from a single part of a monoblock (integral type), and the fixing surface can be directly fixed by bonding to a single tooth surface;
The seat and / or the opening and / or at least one pawl is asymmetric with respect to the central axis and the bracket is asymmetric;
The lateral width of the pawl is narrower than the lateral width of the archwire so that in the lateral direction, the pawl only partially covers the archwire at the support position supported by the seat It is characterized by that.

  According to one embodiment, the self-ligating bracket has two catches.

  According to one embodiment, the two pawls are asymmetric with respect to the central axis with respect to the openings in the passages and / or the shape of the pawls and / or their position relative to the pawl dimensions.

  According to one embodiment, the passage opening is asymmetric with respect to the central axis with respect to its contour and / or shape and / or dimensions.

  According to one embodiment, there are two catches located on the same side as the opening forming the passage and there is no catch on the opposite side of the opening forming the passage.

  According to one embodiment, the opening that forms the passage has a U-shaped or pseudo-U-shaped, V-shaped or pseudo-V-shaped profile having a branched branch, and the clasp is said part. Arranged at the free end of the branch or near the free end.

  According to one embodiment, a pawl with a larger dimension and a pawl with a smaller dimension are respectively arranged on one side and the opposite side of the opening forming the passage.

  According to one embodiment, the two pawls are respectively arranged on one side opposite to the one side of the opening forming the passage, and one pawl is on the side closer to the central axis of the bracket and the passage. On the side away from the end adjacent to the opening to be made and the other pawl is on the side away from the center axis of the bracket and closer to the adjacent end of the opening in the passage It is in.

  According to one embodiment, the opening forming the passage has a quasi-S-shaped profile, the central part is at least approximately linear, and the shape and / or dimensions of the two end portions are different.

  According to one embodiment, the passage openings are bounded on both sides by two longitudinal edges arranged parallel or substantially parallel to each other.

  According to one embodiment, the contour of the opening forming the passage is configured to include at least a substantially straight central section and two curved or inclined end sections.

  According to one embodiment, the slot has an overall shape corresponding to two opposing pseudo right trapezoids, which are elevated and joined by a smaller bottom.

  According to one alternative embodiment, two pawls overhang the slot at each end of the slot and over only a portion of the length of the slot.

  According to one alternative embodiment, a single pawl overhangs the slot over only a portion of the slot length.

  According to one embodiment, the lateral width of one pawl is about half as large as the lateral width of the archwire.

  According to one embodiment, the lateral width of the passage opening is equal to the lateral width of the archwire, with the exception of dimensional tolerances that allow passage.

  According to one embodiment, the cross section of the sheet is either a square, a rectangle, a pseudo square, or a pseudo rectangle.

  According to one embodiment, the slot length is between 2 mm and 7 mm.

  According to a second aspect, the present invention proposes an assembly comprising an asymmetric self-ligating bracket as described above and an archwire, wherein the lateral width of the bracket pawl is Narrower than the lateral width, so that when the archwire is in the support position supported by the seat, the lateral portion of the archwire is covered by a pawl, and the other lateral portion of the archwire is It is not covered by the claws and faces the opening that forms the passage.

  According to one embodiment, the seat and the archwire are shaped to engage in cross section.

  According to one embodiment, the cross-section of the archwire is any one of a square, a rectangle, a pseudo square, and a pseudo rectangle.

  According to the third aspect, the present invention includes a plurality of automatic ligation brackets each capable of being rigidly fixed to one surface of a human tooth, and a wire or an archwire that connects them with appropriate tension. An orthodontic assembly is provided, wherein at least one bracket is an asymmetric self-ligating bracket as described above.

  According to the first embodiment, the two consecutive brackets are asymmetric brackets.

  Depending on the case, two consecutive asymmetric brackets are arranged in the same direction or in two opposite directions.

  According to the second embodiment, two consecutive brackets are one asymmetrical bracket and the other is the same type but symmetric bracket.

  According to one embodiment, the bracket can be fixed directly to the surface of one tooth by means of a fixing surface at the bottom.

  According to one embodiment, for two continuous brackets, one has a gingival pawl and the other has an occlusal pawl.

  According to one embodiment, two consecutive brackets can be fixed to two consecutive teeth.

  Next, a plurality of embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a front view showing a first modified embodiment of an automatic ligation bracket according to the present invention. It is a cross-sectional view by the II-II line of FIG. It is a front view which shows another modified embodiment. FIG. 6 is a front view of one of three modified embodiments of an orthodontic assembly having a plurality of brackets. FIG. 6 is a front view of one of three modified embodiments of an orthodontic assembly having a plurality of brackets. FIG. 6 is a front view of one of three modified embodiments of an orthodontic assembly having a plurality of brackets. It is a front view which shows one of three other modified embodiment. It is a front view which shows one of three other modified embodiment. It is a front view which shows one of three other modified embodiment. FIG. 6 is a front view of one of two modified embodiments of an orthodontic assembly having a plurality of brackets. FIG. 6 is a front view of one of two modified embodiments of an orthodontic assembly having a plurality of brackets. It is a front view which shows embodiment corresponding to loop-shaped installation.

  The automatic ligation bracket 1 or latch according to the present invention is a type formed from a single part of a rigid monoblock that can be directly rigidly fixed to one side of a human tooth by bonding. Therefore, there is no need to provide a fixing part such as a ring, so that the bracket consists of two parts even though they are connected to each other.

  The orthodontic assembly includes a plurality of automatic ligation brackets each capable of being rigidly fixed to one side of a human tooth, and an archwire 2 that couples them with appropriate tension. According to the invention, such an orthodontic assembly comprises at least one asymmetric self-ligating bracket 1.

  First, the bracket 1 includes a bottom portion 3 having a fixing surface 4 that can be directly fixed to one tooth surface by bonding.

  Next, the bracket 1 includes a grooved sheet or slot 5 that can accommodate the archwire 2.

  The bracket 1 is also provided with an opening 6 which forms a passage which is provided on the front face 7 of the bracket 1 facing the fixing surface 4 and allows access to the slot 5.

  The bracket 1 is arranged facing the slot 5 and is in the form of at least one pawl adjacent to the opening 6, preferably in the form of two pawls 8a, 8b, an archwire 5 to the slot 5 It has a fastening means. In the following, an embodiment having two catches 8a, 8b will be described.

  On the one hand, the bracket 1 is provided with a central axis 9 in a direction substantially perpendicular to the fixed surface 4 and the front surface 7, and on the other hand, the bracket 1 is parallel to the fixed surface 4 and the front surface 7 and at least substantially orthogonal to the central shaft 9. It has a direction D (see especially FIGS. 1, 2 and 3).

  The bracket 1 is asymmetric with respect to the central axis 9 because the seat 5 and / or the opening 6 and / or at least one catch pawl 8a, 8b, preferably two pawls 8a, This is because 8b is asymmetric with respect to the central axis 9.

  The lateral width D of the pawls 8 a and 8 b is narrower than the lateral width D of the archwire 2. For example, the former width of these widths is about half of the latter width.

  As a result, along the transverse direction D, the pawls 8a, 8b only partially cover the arch 2 when the arch 2 is in a position supported by the seat 5.

  Accordingly, when the archwire 2 is in a position supported by the seat 5, the arch portion 2 in the lateral direction D is covered by the pawls 8a and 8b, and the other portions of the archwire 2 in the lateral direction D are pawls. It is not covered with 8a and 8b, but faces the opening 6 forming a passage.

  The calculated width along the transverse direction D of the opening 6 forming the passage is equal to the similarly calculated width in the transverse direction D of the archwire 2 with the exception of dimensional tolerances allowing passage.

  As a result, the bracket 1 is significantly reduced in the lateral direction.

  On the other hand, the travel of the arch wire 2 in the lateral direction for passing through the opening 6 forming the passage of the groove 5 is limited, so that installation is facilitated.

  Furthermore, the archwire is at least partially visible over its entire length.

  The cross section of the sheet 5 and the archwire 2 (see FIG. 2) has an engaging shape, that is, the cross section of the sheet 5 is any one of a square, a rectangle, a pseudo square, and a pseudo rectangle, the arch wire 2 The cross section of is a square, rectangular, pseudo-square, or pseudo-rectangular shape.

  In order to make the bracket 1 asymmetric, the two pawls 8a, 8b are asymmetric with respect to the axis 9 with respect to the position and / or shape and / or dimensions of the pawl relative to the opening 6 which forms the passage.

  Similarly, the passage opening 6 is asymmetric with respect to the axis 9 with respect to its contour and / or shape and / or dimensions.

  In the modified embodiment of FIG. 1, the bracket 1 comprises two catches 8a, 8b arranged on the same side as the opening 6 forming the passage. There are no claws on the opposite side of the opening forming the passage.

  In such a modified embodiment, depending on the dimensions, the openings 6 forming the passages are U-shaped or pseudo-U-shaped with branching branches, or V-shaped or pseudo-V-shaped. . The catches 8a, 8b are arranged at or near the free ends of the branches of this shape.

  In the modified embodiment of FIG. 1, the bracket 1 has a larger size pawl 8a and a smaller pawl 8b, which is opposite to one side of the opening 6 forming the passage. And are arranged respectively.

  Of course, in the case of the modified embodiment of FIG. 1, such dimensional differences may be interchanged.

  Another modified embodiment is shown in FIG.

  In another alternative embodiment, the bracket 1 comprises two catches 8a, 8b respectively arranged on one side and the opposite side of the opening 6 forming the passage, and one catch 8a is On the side closer to the shaft 9 and on the side away from the end 10a near the opening 6 forming a passage, the other pawl 8b is on the opposite side away from the shaft 9 and located on the side away from the end 9a. Is on the side closer to the end 10b adjacent to.

  According to these embodiments, the passage opening 6 is quasi-S-shaped, with at least a substantially straight central portion and two end portions of different shapes and / or dimensions that continue to the ends 10a, 10b. And have.

  Another modified embodiment is shown in FIG.

  According to another additional characteristic, the opening 6 forming the passage is parallel to each other in the straight part and the curved part, or by two longitudinal edges 11a, 11b arranged substantially parallel to each other. , Bounded on both sides.

  According to one additional feature, the opening 6 forming the passage comprises at least a substantially straight central section 12 and two curved or inclined end sections 13a, 13b adjacent to the ends 10a, 10b. It has a contour that is shaped to provide.

  According to the embodiment shown in FIG. 9, the central section 12 is relatively long compared to the end sections 13a and 13b.

  According to embodiments, the slot 5 has an overall shape corresponding to two opposing pseudo right trapezoids facing each other at the elevation and joined by the smaller bottom.

  According to embodiments, the two pawls 8a, 8b overhang only a part of the length of the slot 5 at the end portions adjacent to the ends 10a, 10b, respectively.

  With the above structure, a bracket having a length of the slot 5 of 2 mm to 7 mm can be obtained.

  According to one embodiment shown in FIGS. 4, 5, 10, and 11, two consecutive brackets are one asymmetric bracket. In the case of FIGS. 4 and 10, these two continuous asymmetric brackets 1 are arranged in the same direction. On the contrary, in the case of FIGS. 5 and 11, the two consecutive asymmetric brackets 1 are arranged in two opposite directions.

  According to one embodiment illustrated by FIG. 6, in a series of two brackets, one bracket 1 is asymmetric and the other bracket is entirely the same type and symmetrical.

  FIG. 12 shows one embodiment corresponding to a loop installation. The teeth are 11, 12,. . . , 21, 22. . . 31, 32. . . 41, 42. . . Has been identified by the number of.

  As can be seen from this figure, the bracket 1 is arranged in consideration of being placed above the canine of the gingiva, thereby obtaining the shape of the arch wire 2 that is optimally fixed by the illustrated bracket 1.

  As already explained, in one embodiment, one of the two consecutive brackets 1 has pawls 8a, 8b on the gingival side and the other bracket has pawls 8a, 8b on the occlusal side. be able to. On the other hand, it is also possible to fix the bracket 1 to continuous teeth.

Claims (29)

A part of an orthodontic assembly comprising a plurality of brackets (1) each capable of being rigidly fixed to one side of a single human tooth and a wire or archwire (2) connecting the brackets with appropriate tension An automatic ligation bracket (1)
A bottom (3) having a fixing surface (4);
A grooved sheet or slot (5) capable of accommodating an archwire (2) for coupling the bracket;
An opening (6) provided in the front face (7) opposite the fixing face (4) and forming a passage allowing access to the slot (5);
The fastening of the archwire (2) to the groove (5), which is arranged in the shape of at least one pawl (8a, 8b) arranged facing the slot (5) and adjacent to the opening (6) Means,
A central axis (9) in a direction substantially perpendicular to the fixed surface (4) and the front surface (7), wherein the bracket is asymmetric with respect to the central axis;
A lateral direction (D) at least approximately perpendicular to the central axis (9) and parallel to the fixed surface (4);
With
The bracket (1) is formed from a single piece of monoblock and the fixing surface (4) can be fixed directly by bonding to a single tooth surface;
The seat (5) and / or the opening (6) and / or at least one catch (8a, 8b) are asymmetric with respect to the central axis (9) and the bracket (1) is asymmetric ,
The lateral (D) width of the pawl (8a, 8b) is narrower than the lateral (D) width of the archwire (2), so that in the lateral direction the pawl (8a, 8b) An automatic ligation bracket characterized in that the archwire (2) is only partially covered at a support position supported by the sheet (5).   Automatic ligation bracket (1) according to claim 1, characterized in that it comprises two catches (8a, 8b).   The two catches (8a, 8b) are asymmetric with respect to the central axis (9) with respect to the opening (6) and / or the shape of the passage and / or their position relative to the size of the pawl. Automatic ligation bracket (1) according to claim 2, characterized in that it is.   Automatic ligation according to claim 2 or 3, characterized in that the opening (6) forming the passage is asymmetric with respect to the central axis (9) with respect to its contour and / or shape and / or dimensions. Bracket (1).   There are two catches (8a, 8b) arranged on the same side as the opening (6) forming the passage, and there is no catch on the opposite side of the opening (6) forming the passage. The automatic ligation bracket (1) according to any one of claims 2 to 4.   The opening (6) forming the passage has any one of a U-shaped shape, a pseudo-U-shaped shape, a V-shaped shape, and a pseudo-V-shaped shape having branched branches, and a pawl (8a, Automatic ligation according to any one of claims 1 to 5, characterized in that 8b) is arranged at or near the free ends (10a, 10b) of the branches. Bracket (1).   The larger size pawl (8a, 8b) and the smaller size pawl (8a, 8b) are respectively arranged on one side and the opposite side of the opening (6) forming the passage. Automatic ligation bracket (1) according to any one of claims 2 to 6, characterized in that it is characterized in that   Two pawls (8a, 8b) are respectively arranged on one side and the opposite side of the opening (6) forming the passage, and one pawl (8a, 8b) is closer to the central axis (9) of the bracket And on the side away from the end (10a, 10b) adjacent to the opening (6) forming the passage, the other pawl (8b, 8a) is the central axis (9) of the bracket 8. The method according to claim 2, characterized in that it is on the side farther from the side and closer to the adjacent end (10 b, 10 a) of the opening (6) forming the passage. The automatic ligation bracket (1) according to claim 1.   The opening (6) forming the passage has a quasi-S-shaped contour, the central part (12) is at least approximately linear, and the shapes and / or dimensions of the two end portions are different. The automatic ligation bracket (1) according to any one of claims 2, 3, 4, 7, and 8.   2. The opening (6) forming the passage is delimited on both sides by two longitudinal edges (11a, 11b) arranged parallel or substantially parallel to each other. 9. The automatic ligation bracket (1) according to any one of items 9 to 9.   The contour of the opening (6) forming the passage is configured to include at least a substantially straight central section (12) and two curved or inclined end sections (13a, 13b). An automatic ligation bracket (1) according to any one of the preceding claims, characterized in that   12. The slot (5) according to claim 1, wherein the slot (5) has an overall shape corresponding to two opposing pseudo right trapezoids which are connected by a smaller bottom at the elevation. The automatic ligation bracket (1) according to item.   13. Two clasps (8a, 8b) respectively projecting over the slot (5) over a part of the length of the slot, each at the end of the slot. The automatic ligation bracket (1) according to item.   Automatic ligation bracket (1) according to claim 1, characterized in that a single catch (8a, 8b) projects over the slot (5) over only a part of the length of the slot.   15. The width in the lateral direction (D) of one catch (8a, 8b) is about half the lateral width of the archwire (2). The automatic ligation bracket (1) according to one item.   The lateral (D) width of the opening (6) forming the passage is equal to the lateral (D) width of the archwire (2), apart from dimensional tolerances allowing passage. Automatic ligation bracket (1) according to any one of the preceding claims.   The automatic ligation bracket (1) according to any one of claims 1 to 16, characterized in that the cross section of the sheet (5) has a shape of any one of a square, a rectangle, a pseudo square, and a pseudo rectangle. .   The automatic ligation bracket (1) according to any one of claims 2 to 17, characterized in that the length of the slot (5) is from 2 mm to 7 mm.   19. An assembly comprising an asymmetric self-ligating bracket (1) according to any one of claims 1 to 18 and an archwire (2), the catch (8a, 8b) of the bracket (1). ) When the archwire (2) is in a support position where it is supported by the seat (5) when the archwire (2) is in a support position supported by the seat (5). The lateral part of the arch wire (2) is covered by the pawls (8a, 8b) and the other lateral part of the archwire (2) is not covered by the pawls (8a, 8b), and the openings (6 ).   The asymmetric self-ligating bracket (1) and archwire (2) according to claim 19, characterized in that the seat (5) and the archwire (2) are shaped to engage in cross section. Assembly.   21. Asymmetric self-ligating bracket (1) and archwire according to claim 19 or 20, characterized in that the cross section of the archwire (2) has any one of square, rectangular, pseudo-square and pseudo-rectangular shapes An assembly comprising (2).   A plurality of automatic ligation brackets each capable of being rigidly fixed to one face of a human tooth, and a wire or arch wire (2) for connecting them with appropriate tension, wherein at least one bracket is Orthodontic assembly, characterized in that it is an asymmetric self-ligating bracket (1) according to any one of the preceding claims.   The orthodontic assembly according to claim 22, characterized in that the two consecutive brackets are asymmetrical brackets (1).   24. Orthodontic assembly according to claim 23, characterized in that two consecutive asymmetric brackets (1) are arranged in the same direction.   An orthodontic assembly according to claim 23, characterized in that two consecutive asymmetric brackets (1) are arranged in two opposite directions.   The orthodontic assembly according to claim 22, characterized in that one of the two consecutive brackets is an asymmetrical bracket (1) and the other is the same type but a symmetric bracket.   27. An orthodontic appliance according to any one of claims 22 to 26, characterized in that the bracket can be fixed directly to the surface of one tooth by means of a fixing surface (4) of the bottom (3). assembly.   28. The two continuous brackets according to any one of claims 22 to 27, characterized in that one has gingival claws (8a, 8b) and the other has occlusal claws (8a, 8b). An orthodontic assembly according to claim 1.   29. An orthodontic assembly according to any one of claims 22 to 28, wherein two successive brackets are fixable to two successive teeth.

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