WO2009094685A1

WO2009094685A1 - Orthodontic element

Info

Publication number: WO2009094685A1
Application number: PCT/AT2009/000035
Authority: WO
Inventors: Markus Hirsch
Original assignee: Pbd, Patent & Business Development Ag
Priority date: 2008-01-30
Filing date: 2009-01-30
Publication date: 2009-08-06
Also published as: AT506394B1; AT506394A4

Abstract

The invention relates to an orthodontic element (1) comprising a base body (2) that is provided with a visible surface (3), a base surface (4) that is arranged at a distance from said visible surface and lateral surfaces (5 - 8) that extend between said other surfaces. At least one groove-shaped recess (14) is arranged in said base body (2), said recess extending from the base surface (4) in the direction of the visible surface (3) and between two lateral surfaces (5 to 8). Said groove-shaped recess (14) comprises, when seen from an axial viewpoint, a defining line (18) that is formed exclusively from curved sections (19 - 23) arranged one behind the other in the direction of the periphery.

Description

Orthodontic component

The invention relates to an orthodontic component having a base body which has a visible surface, a base surface distanced therefrom and side surfaces extending therebetween, wherein in the base body at least one groove-shaped recess is arranged, which extends from the base surface in the direction of the visible surface and between two side surfaces ,

From the US design patents US D 358,649 S and US D 358,650 S Orthodonit- see components for tooth regulation have become known, which have on the base surface nutfbrmigen recesses in the form of dovetail grooves.

The present invention has for its object to provide a reliable adhesive bond between the orthodontic component and the tooth surface and also to increase the life of the component.

This object of the invention is achieved in that the groove-shaped recess seen in axial section has a boundary line which is formed exclusively from circumferentially arranged behind each other bow sections.

The resulting from the features of the characterizing part of claim 1 advantage is that is created by the cross-sectional formation of the groove-shaped recess and the circumferentially successively arranged arc sections with different convex and concave curvatures in the base surface continuous recess, which at Almost the same external dimensions with respect to the previously known groove cross sections allow a complete or very high degree of filling for the intended for connection holding or adhesive. As a result, after a cross-sectional smaller or smaller constriction area, a subsequent, voluminously rapidly increasing receiving area for this holding means is created, which can be filled in more easily and more completely by this holding means. This state is maintained even during the curing of the holding means, whereby on all surface portions of the groove-shaped recess secure contact with the holding means is ensured without any gaps to the component. This not only the penetration of liquids or It also prevents tooth decay in these areas, but also improves tooth and oral hygiene for the wearer. Furthermore, sharp edges or slightly rounded transition areas are avoided by the large number of curved sections, thereby achieving a more homogeneous construction of the orthodontic component. This also improves the strength properties of the entire component, especially in the connection area with the tooth. This leads to a longer durability of the entire connection between the component and the tooth. In addition, even the risk of breakage is reduced especially in these very small components, which in turn increases a higher durability or wearing time for a patient.

A further embodiment according to claim 2 is also advantageous since, starting from the narrowing area between the tooth surface and the receiving space of the groove-shaped recess, a more rapid increase in cross-section towards the groove bottom is achieved. As a result, higher holding forces of the introduced into the grooveformige recess connecting means in the groove-shaped recess or the receiving area are achieved. This is achieved above all by an improved positive connection and the rapid lateral increase of the cross section of the groove-shaped recess.

Also advantageous is an embodiment according to claim 3, as achieved in the transition region from the base surface to the receiving area of the connecting means, a predetermined inflow and beyond even better adhesion of the connecting means is achieved in this section.

The embodiment according to claim 4 makes it possible to achieve a symmetrical design of the groove-shaped recess with respect to a common division plane.

According to another embodiment variant according to claim 5, a simple adaptation to different geometries of the orthodontic component for different locations on the individual teeth is created.

Also advantageous is a development according to claim 6, since a rapid increase of the cross section is achieved laterally with respect to the common division plane and thus the introduction or filling of the entire groove-shaped recess is substantially improved. In the embodiment according to claim 7, it is advantageous that a higher degree of cross-sectional coverage is achieved with respect to the constriction area, whereby the positive locking forces of the connecting means in the groove-shaped recess are increased.

It is achieved by the development according to claim 8 that, after a relatively short entry region into the receiving space or groove base, a voluminously larger receiving chamber is created and at the same time a sufficient strength of the component is achieved in the region between the base surface and the receiving chamber.

As a result of the embodiment according to claim 9, a continuous decrease of the cross section up to the final filling of the groove-shaped recess can be achieved, whereby air pockets or voids formation in the holding means or between the latter and the groove base are avoided.

Also advantageous is an embodiment according to claim 10, since such a gently rounded groove bottom is created, from which there is no risk of breakage with regard to sharp-edged transitions.

Finally, further advantageous embodiments are characterized in the claims 11 to 13, wherein the advantages of the description can be found.

The invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the drawings.

Show it:

1 shows an orthodontic component with groove-shaped recesses in its base surface according to the known prior art, in view and simplified representation;

2 shows an orthodontic component according to the invention with groove-shaped Recesses in its base surface, in view and simplified representation;

3 shows a partial section of the component according to FIG. 2, in a view and enlarged, simplified illustration;

4 shows a comparison between known and inventive groove-shaped recesses in the base surfaces of the components, in mutually congruent position of the recesses.

Figure 5 shows the groove-shaped recess according to the known prior art, in view of Figure 1 and greatly enlarged view ..;

Fig. 6, the inventive groove-shaped recess, in view of FIG. 2 and greatly enlarged view.

By way of introduction, it should be noted that in the differently described embodiments, identical parts are provided with the same reference numerals or identical component names, wherein the disclosures contained in the entire description can be mutatis mutandis to identical parts with the same reference numerals and component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the various exemplary embodiments shown and described may also represent separate solutions in their own right, according to the invention or in accordance with the invention.

All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all subareas start with a lower one

Limit of 1 or greater and end at an upper limit of 10 or less, eg 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10. In FIG. 1, an orthodontic component 1 according to the known prior art is shown simplified in a view, wherein it should be mentioned that the outline shapes shown, or the geometry of the component 1 is shown only by way of example and this depends on the application or location and then adjust.

The orthodontic component 1 is used in dentistry and there usually also referred to as a so-called "bracket" and is used inter alia for the treatment of malocclusions.

The orthodontic component 1 comprises a basic body 2, which is delimited in a simplified manner by a viewing surface 3 facing a viewer, a base surface 4 facing away from it, and its lateral surface 5 to 8 extending between these two. The base surface 4 serves for attaching the base body 2 to a tooth 9 with a tooth surface 10 shown in a simplified manner. Furthermore, in the area of the visible surface 3, a receiving slot 11 for receiving a tension wire 12 is shown in simplified form. The receiving slot 1 1 extends here starting from the visible surface 3 in the direction of the base surface 4 and between the two side surfaces 7, 8th

The base surface 4 serves to be attached via holding means 13 such as an adhesive or the like. To the tooth surface 10 of the tooth 9 and to be connected thereto. The holding means 13 is shown in simplified form by dots. To increase the connecting surface on the base body 2, at least one preferably, however, several groove-shaped recesses 14 are recessed in the base surface 4 and extend starting from the base surface 4 in the direction of the visible surface 3. The longitudinal extent of the groove-shaped recess 14 extends here between the two side surfaces 7 and 8.

The recess 14 has an approximately dovetail-shaped cross section when viewed in axial section. This cross-sectional shape is limited by trapezoidal or conically tapering towards each other in the direction of the base surface 4 side walls 15, 16 and a groove bottom 17. Between the two side walls 15 and 16 and the groove bottom 17 and the base surface 4 slight rounding or rounding are provided in order to avoid a sharp-edged transition. 2, an orthodontic component 1 according to the present invention is shown, wherein the representation of the outer contour shapes has been slightly modified to the representation in FIG. Likewise, like reference numerals and component designations as in the preceding Fig. 1 are used for the same parts. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIG.

This component 1 in turn also comprises the main body 2, which is bounded or fixed in its spatial form by the visible surface 3, the base surface 4 and the side surfaces 5 to 8 extending therebetween. In the visible surface 3, in turn, the receiving slot 11 may be provided for receiving the tension wire 12 shown in simplified form, which extends between the two side surfaces 7, 8 in its longitudinal direction. Furthermore, the receiving slot 11, starting from the visible surface 3, extends in the direction of the base surface 4.

In the base surface 4, however, a plurality of groove-shaped recesses 14 is again preferably arranged, wherein the longitudinal extent between the two side surfaces 7, 8 extends. Furthermore, it would also be possible to align the longitudinal extension of the groove-shaped recesses 14 between the two other opposing side surfaces 5, 6, or else one, to align the groove-shaped recesses 14, starting from the base surface 4, in the direction of the visible surface 3 diagonal arrangement to choose. Thus, for example, the recesses 14 between the side surface 5 shown here right and the rear side surfaces 8 or between the side surface 6 shown here on the left and the rear side surface 8 may be aligned extending. Likewise, a combination of these alignments and a crosswise arrangement would also be possible.

In this exemplary embodiment shown here, the groove-shaped recess 14, seen in axial section, has an approximately mushroom-shaped cross-section. A boundary line 18 of the groove-shaped recess 14 is seen in axial section exclusively formed in the circumferential direction of successively arranged bow sections 19 to 23. It should be noted that the sake of clarity, only a few such arc sections 19 to 23 have been shown, but it is also possible to form the individual arc sections 19 to 23 again from individual partial arc sections or put together. As can now better be seen from the enlarged detailed illustration of the recess 14 in FIG. 3, the cross section thereof, viewed in axial section, is delimited both on both sides of the recess 14 and starting from the base surface 4 by the curved first arc sections 19, 20. In this case, these first arc sections 19, 20 have a relative to the recess 14 directed towards each other convex curvature. The first arc sections 19, 20 form a constriction region 24 for the groove-shaped recess 14. Based on the boundary line 18 of the cross section of the groove-shaped recess 14 seen in axial section defines the boundary line 18 individual wall surfaces 25 to 28 and a groove bottom 29th

Furthermore, it is possible for the two first curved sections 19, 20 to have the same curvature relative to one another or else to have a different curvature relative to one another.

Under curvature of a curve or the boundary line 18, which is formed by the individual arc sections 19 to 23, here the deviation of the curve at a certain point is understood by a straight line. The curvature of a curve or the arc sections 19 to 23 at a certain point thus indicates how much the curve in the immediate vicinity of the point or at this point deviates from a straight line. The greater the curvature, the greater the slope of the curve.

The two first convexly curved arc sections 19, 20 terminate in simplified and marked by a cross end points 30, 31. Subsequently to the two convex curved arc sections 19, 20 and starting from each of the two end points 30, 31 is the cross section of the groove-shaped recess fourteenth As seen in axial section by the other arc sections 21, 22 limited. The further arcuate sections 21, 22 each have a concave curvature with respect to the recess 14, these forming, in cooperation with the groove base 29, a receiving region 32 of the groove-shaped recess 14 which is widened in relation to the constriction region. The other two arcuate sections 21, 22 define the two wall surfaces 27, 28 as viewed in the longitudinal direction and terminate at further end points 33, 34. As can be seen from this enlarged illustration, the two concave curved sections 21, 22 adjoining the end points 30, 31 of the first convexly curved arc sections 19, 20 have a smaller or lower curvature with respect to the first curved sections 19, 20. This means that they have a flat longitudinal profile in the circumferential direction in cross-section.

Seen in axial section, the groove bottom 29 of the recess 14 is bounded or defined by the boundary line 18 with the further concavely curved arc section 23.

The end points 30, 31 and 33, 34 are given only by way of example and depend on the selection and curvature of the individual arc sections 19 to 23. With regard to the recess 14, the boundary line 18, as seen in axial section, is delimited exclusively by arc sections 19 to 23, without a section or subsection running in a straight line. At the two convex curved arc sections 19, 20 always concave arcuate sections 21, 23 close to it and thus define the cross section of the groove-shaped recess 14 seen in axial section.

The further concavely curved arc portion 23 of the groove bottom 29 has with respect to the second concave arcuate arc sections 21, 22 to a smaller or smaller curvature and is thus formed again flatter running.

Furthermore, in the center of the recess 14, a dividing plane 35 is indicated in dash-dotted lines, which extends in the longitudinal direction of the groove-shaped recess 14 and is aligned starting from the base surface 4 towards the groove base 29. With a symmetrical design or arrangement of the individual arc sections 19 to 23 with respect to the dividing plane 35, it is then also possible to speak of a plane of symmetry to which the arc sections are aligned in mirror image with respect to one another.

Furthermore, it is shown that the two convexly arched arcuate portions 19, 20, which bound the constriction portion 24 of the groove-shaped recess 14, are spaced apart from each other with respect to the dividing plane 35 at a distance 36 at the narrowest point. If one now considers the individual points of the boundary line 18 in the region of the further concavely curved arc sections 21, 22, these are always further away from the dividing plane 35 distanced as the two convex curved arc sections 19, 20 in the narrowest portion of the constriction region 24 with the distance 36. This ensures that is formed by a rounded transition starting from the base surface 4 first, the constriction region 24 of the grooveformigen recess 14 and then the voluminous or cross-sectionally larger receiving area 32.

Due to the always arcuate boundary line 18 of the recess 14, which is composed solely by convex or concave curved arc sections 19 to 23 in the cross section seen in axial section, a better and higher degree of filling of the entire recess 14 in its cross-section through that for connection the tooth 9 on the base surface 4 and in the groove-shaped recesses 14 up or introduced holding means 13 achieved.

4, the groove-shaped recesses 14 according to the known state of the art are shown in dashed lines and according to the present invention in thick solid lines in superimposed position relative to one another. For the sake of clarity, the boundary line of the cross section of the groove-shaped recesses 14 according to the present invention has been designated by 18 'and those according to the known state of the art by 18'.

With respect to the common division plane 35, the narrowing region 24 or the distance 36 of the groove-shaped recess 14 with the arc sections 19, 20 is less than the distance 36 'according to the known prior art. As a result of this minimal reduction of the constriction region 24, it is achieved that sufficient penetration or inflow of the holding means 13 into the receiving region 32 is possible, and nevertheless a better or higher degree of filling up to complete filling of the entire receiving region 32 by the holding means 13 is achieved.

Further, by modification of the rectilinear dovetail-shaped recess 14 towards the mushroom-shaped and concavely curved boundary line 18 for the cross-section better or higher lateral coverage in the direction perpendicular to the division plane 35 with respect to the constriction region 32 with its distance 36 is achieved.

5 and 6, the recess 14 according to the present invention or the each recess 14 'according to the prior art, each shown enlarged. Starting from the dividing plane 35, which runs through the center of the recess 14 or 14 ', 35 parallel auxiliary lines to the first convex curved arc sections 19, 20 and 19', 20 'are entered to the division plane. Furthermore, the areal cross-sectional portion between the boundary line 18 or 18 'and the auxiliary line is deposited with a hatching. It can be seen that the cross-sectional area fraction of the recess 14 according to the invention in FIG. 6 is greater than that area portion of the cross section in FIG. 5. This with the same depth of the recess 14 or 14 'up to the groove bottom 29 or 29' and approximately the same width with respect to the division plane 35 or 35 '

This areal larger cross-sectional portion according to FIG. 6 of the present invention thereby also increases the retention force of the holding means 13 in the recess 14 and thus the necessary extraction force, which is necessary in order to deduct the component 1 from the tooth 9 can. However, this also results in higher loads than in the hitherto known embodiments when chewing or biting off harder or hard objects, without the risk of the entire component 1 being unintentionally detached from the czarino surface 10. This is because the retaining means 13 which has penetrated into the recess 14, starting from the two auxiliary lines, also have a larger surface portion and, connected thereto, a greater proportion by volume over the entire longitudinal extension of the recess, which counteracts the pull-out movement.

A further advantage of the continuous rounded cross-sectional configuration of the recess 14 according to the present invention is also that a substantial increase in the base body 2 is accompanied, since notch effects are avoided starting from the known dovetail-shaped recesses 14 'in the rounded corner regions which lead to a lighter break, in particular in basic bodies 2 formed from ceramic or ceramic materials. This not only an increased adhesive force of the entire component 1 on the tooth 9 and its tooth surface 10 is achieved via the holding means 13, but also increases the overall strength of the body 2.

Finally, it should be noted that the material for forming the orthodontic component 1 may be formed from the materials known from the prior art. So this example, from the group of ceramic or ceramic materials, plastic, Metal such as stainless steel, be selected, which have sufficient strength and compatibility in use. Preferably, the formation of the groove-shaped recess 14 is selected in orthodontic components made of ceramic or ceramic materials. If, for example, a plastic material is selected as the material, the component 1 can also be produced in an injection molding process in the extrusion process. In the extrusion process, the softened material distributed due to the circumferentially formed by arc sections recess 14 (round, mushroom-shaped groove) better, faster and safer than before in the known recesses. Furthermore, therefore, the strength, risk of breakage and quality of the base of the component 1 also improves.

In addition, however, it is also possible for a coating described in more detail below to be applied to the orthodontic components 1 described above at least in regions or in sections.

This coating, not shown here in the figures, can be applied by spraying, dipping or other coating methods known from the prior art.

Before the orthodontic components 1 are coated, their substrate can be pretreated by pretreating at least individual portions of the surface. The orthodontic components 1 are moved in a container, preferably in a drum, in the center or center of a spray device is arranged, with which the orthodontic components 1 are sprayed briefly and by means of air flow, which is generated or introduced in the container 1, in Movement are held and thus their surface is dried. After a short drying interval, the spraying device again dispenses a coating formulation, the orthodontic components 1 continue to be kept in motion and thus the surface is dried or hardened and hardened. The temperature in the container is 2O ⁰ C to 250 ° C, the heat can be generated directly in the container or warm air can be introduced. The drying or hardening of the surface of the components 1 is preferably carried out for a period of 10 minutes to 120 minutes.

The coating formulation comprises at least one solvent, such as ethanol, propanol, Butanol or mixtures thereof, which volatilize in the coating process and are hardly or no longer detectable in the coating of the orthodontic component 1, optionally a silicon compound, such as glycidyloxypropyltrimethoxysilane, titanium dioxide and / or titanium nitride and silver or a silver compound.

The coating containing silver ions suppresses the proliferation of bacterial populations.

Due to the hydrophobic and oleophobic surface properties not only the deposition of plaques but also a discoloration of the surface of the orthodontic components 1 is prevented. The surface of the orthodontic component 1 thus shows good self-cleaning properties. The hydrophobic properties of the orthodontic components 1 also facilitate their cleaning by a multiple. Especially with such microstructured or small components 1 with the smallest projections and / or recesses or depressions, food particles readily accumulate at various angles, which are difficult to access with a mechanical device such as a toothbrush. The hydrophobic or oleophobic coating does not even accumulate food residues because they can already be removed by rinsing the oral cavity.

The substrate and the coating are chemically bonded together, preferably via covalent bonding. Ultra-thin coatings can be produced. These ultrathin coatings can have elasticities comparable to stainless steel.

In addition to the high resistance, the surface of the orthodontic components 1 with a coating according to the invention also has a high scratch resistance.

The antimicrobial properties of the coating according to the invention of the orthodontic components 1 were demonstrated in different tests. The coating is effective against Escherichia coli, Campylobacter, Listeria, Salmonella, Pseudomonas, Aspergillus niger, Pleurococcus, Rhodotorula, etc. The antimicrobial effect of silver is due to the fact that by destroying the surface or membrane of the microorganisms, silver ions can penetrate and denature both of proteins as well as the nucleic acids of the microorganism takes place. The coating formulation may be 10% to 15% ethanol, 8% to 10% 2-propanol, 25% to 30% 1-metoxy-2-propanol, 25% to 30% 2-butanol, 7% to 10% 1-pentanol , less than 5% titanium dioxide and less than 4% silver chloride.

In an alternative embodiment, the coating formulation may also have the following composition: 20 to 25% glycidyloxypropyltrimethoxysilane, 1 to 5% metoxypropyl 2-acetate, 3 to 5% solvent naphtha, 50 to 60% n-butyl acetate, 1 to 5% titanium dioxide and 1 to 4% silver chloride. Of course, the coating formulation according to the invention is not limited to the aforementioned composition examples.

By applying the coating formulation to the orthodontic components 1, in particular, solvent constituents of the coating formulation volatilize. The composition on the orthodontic component 1 therefore differs from the composition of the coating formulation. In any case, at least titanium dioxide and / or titanium nitride and optionally silver ions are contained in the coating on the orthodontic component 1 itself. If silver chloride is applied in the coating formulation, silver ions are also contained in the coating of the orthodontic component 1.

The coating on the orthodontic component 1 has no porosity, which results in particularly good cleaning properties of the orthodontic components 1 according to the invention.

However, the coating formulation can also be applied to dental components as well as tools used in orthodontic or dental work.

The embodiments show possible embodiments of the orthodontic component 1, wherein it should be noted at this point that the invention is not limited to the specifically illustrated embodiments of the same, but also various combinations of the individual embodiments are mutually possible and this variation possibility due to the teaching of technical action by objective invention in the skill of working in this technical field expert. So there are also all conceivable variants, by combinations of individual details the illustrated and described embodiment variant are possible, encompassed by the scope.

For the sake of order, it should finally be pointed out that, for better understanding of the structure of the orthodontic component 1, this or its components have been shown partially unevenly and / or enlarged and / or reduced in size.

The problem underlying the independent inventive solutions can be taken from the description.

Above all, the individual embodiments shown in FIGS. 2, 3, 4, 6 can form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

REFERENCE NUMBERS

1 component

2 main body

3 visible surface

4 base area

5 side surface

6 side surface

7 side surface

8 side surface

9 tooth

10 tooth surface

11 receiving slot

12 tension wire

13 holding means

14 recess

15 side wall

16 side wall

17 groove base

18 boundary line

19 bow section

20 arc section

21 bow section

22 bow section

23 bow section

24 narrowing area

25 wall surface

26 wall surface

27 wall surface

28 wall surface

29 groove base

30 endpoint

31 endpoint

32 recording area

33 endpoint

34 end point

35 division level

36 distance

Claims

Patent claims

An orthodontic component (1) having a base body (2) which has a visible surface (3), a base surface (4) distanced therefrom and side surfaces (5 to 8) extending therebetween, wherein at least one groove-shaped recess in the base body (2) (14) is arranged, which extends starting from the base surface (4) in the direction of the visible surface (3) and between two side surfaces (5 to 8), characterized in that the groove-shaped recess (14) seen in axial section a boundary line (18 ), which is formed exclusively from in the circumferential direction successively arranged arc sections (19-23).

2. Orthodontic component (1) according to claim 1, characterized in that the groove-shaped recess (14) seen in axial section has a mushroom-shaped cross-section.

3. Orthodontic component (1) according to claim 1 or 2, characterized in that the cross section of the groove-shaped recess (14) seen in axial section respectively by both sides of the recess (14) and starting from the base surface (4) curved first arc sections ( 19, 20) is limited and the first arc sections (19, 20) with respect to the recess (14) facing each other convex curvature, which form a constriction region (24) of the grooveformigen recess (14).

4. Orthodontic component (1) according to claim 3, characterized in that the two first arc sections (19, 20) each have the same curvature.

5. Orthodontic component (1) according to claim 3, characterized in that the two first arc sections (19, 20) to each other have a different curvature.

6. orthodontic component (1) according to one of claims 3 to 5, characterized in that the cross-section of the groove-shaped recess (14) seen in axial section starting respectively endpoints (30, 31) of the first two convexly curved arc sections (19, 20) is bounded by further arcuate sections (21, 22) and the further arcuate sections (21, 22) each have a concave curvature with respect to the recess (14), which form a receiving region (32) of the groove-shaped recess (14).

7. Orthodontic component (1) according to claim 6, characterized in that the boundary lines (18) of the further, concavely curved arc sections (21, 22) with respect to a longitudinal groove-shaped recess (14) extending and from the base surface (4). to a groove bottom (29) of the recess (14) extending graduation plane

(35) are further distanced from it than the boundary lines (18) of the first two convexly curved arc sections (19, 20) in the constriction area (24) and the smallest distance

(36) with regard to the division level (35).

8. Orthodontic component (1) according to claim 6 or 7, characterized in that the two at the end points (30, 31) of the first, convex curved arc sections (19, 20) adjoining second arc sections (21, 22) with respect to the first arc sections (19, 20) have a smaller or smaller curvature.

9. Orthodontic component (1) according to one of the preceding claims, characterized in that the groove-shaped recess (14) seen in axial section has a groove bottom (29) whose boundary line (18) is formed by at least one further concavely curved arc portion (23) ,

10. Orthodontic component (1) according to claim 9, characterized in that the further concavely curved arc portion (23) of the groove base (29) with respect to the second concavely curved arc portions (21, 22) has a smaller or smaller curvature.

11. Orthodontic component (1) according to one of the preceding claims, character- ized in that the orthodontic component (1) is a bracket.

12. Orthodontic component (1) according to one of the preceding claims, characterized in that the material thereof from the group of ceramic, plastic, metal such as stainless steel, is selected.

13. Orthodontic component (1) according to one of the preceding claims, characterized in that at least partially a coating is applied to these.