WO2003059186A1

WO2003059186A1 - Orthodontic support and a method of placing an archwire on orthodontic supports

Info

Publication number: WO2003059186A1
Application number: PCT/ES2003/000024
Authority: WO
Inventors: Julio Manuel Grauer Lijtenstein; Dan Grauer Amir
Original assignee: Grauer Lijtenstein Julio Manue; Dan Grauer Amir
Priority date: 2002-01-17
Filing date: 2003-01-17
Publication date: 2003-07-24
Also published as: ES2190763A1; ES2190763B1

Abstract

The invention relates to an orthodontic support and to a method of placing an archwire on orthodontic supports. The inventive support comprises: a body (2) which is fixed to a dental piece (D), the vestibular face of said body (2) comprising one or more grooves (3) which are used to receive an archwire (4); and fixing means (5, 7) which are used to fix said archwire (4) in the groove (3). The aforementioned body (2) is joined to the dental piece (D) by means of: a base (8) comprising a seat (9) which is adapted to the shape of the dental piece (D) so that it can be fixed thereto using a cement or adhesive (10); and releasable fixing means (11, 12) which are used to fix the body (2) to the base (8) in a removable manner. In this way, the body and the base are connected to one another to form a single unit which transmits corrective forces from the arch (4) to the tooth without producing any relative movement between the body (2) and the base part (8).

Description

ORTHODONIC SUPPORT AND PLACEMENT PROCEDURE OF A WIRE ARC ON ORTHODONIC SUPPORTS

Scope of the invention The present invention concerns an orthodontic support for use in an orthodontic treatment with a wire arch and, more particularly, an orthodontic support provided with removable attachment means to the dental part.

The present invention also concerns a method of placing a wire arch on orthodontic brackets using such brackets provided with removable attachment means to the dental part.

Background of the invention

A type of orthodontic treatment comprising a series of orthodontic brackets, each fixed to a dental piece of a patient, and a wire arch mounted in grooves existing in the vestibular face of said orthodontic brackets, is well known. Each of said grooves has geometric characteristics that determine that said wire arch, inserted therein, exerts certain forces and moments on the brackets, which in turn transmit said forces and moments to the dental pieces to force their position. for corrective or therapeutic purposes.

A typical known orthodontic support comprises a body provided with a base portion adapted to be fixed to a dental piece by means of joining such as a cement. In the vestibular face of said body at least one of said grooves is defined to receive the wire arch, which is held in the groove by means of a ligature element passed under fins protruding from the body and acting as grip. Said ligating element can be plastically deformable, such as a wire, or elastically, such as an elastic ring, to ensure said fastening.

A typical method of placing the wire arch on the orthodontic supports comprises, firstly, fixing each support one by one to its corresponding dental piece, then inserting the ends of the arch of wire in tubes attached to the molar pieces, then arrange said wire arch in the grooves and finally fasten the wire arch to each of the supports. It should be noted that, for the treatment to be effective, the position of each groove, that is, of each support, with respect to the dental piece and with respect to the wire arch is of critical importance. Therefore, the operation of fixing each support to its corresponding dental piece is carried out with precision and an auxiliary tool can be used to aid positioning.

The forces and moments exerted by the wire arch over the tooth are of relatively low magnitude. Excessive force applied by some fortuitous cause on the wire arch or on the support can result in a detachment of the cement that joins one or more brackets to the corresponding dental pieces or generate harmful effects on the dental piece. When this occurs, the patient must go to the orthodontist to remove all the ligatures, remove the wire arch and detached brackets, clean the surface of the respective dental pieces of cement remains, re-fix the brackets with cement , re-insert the wire arch and reestablish the ligatures. This process is long and expensive and it would be desirable to have orthodontic brackets provided with releasable fixing means to the dental piece, in which a force necessary to release said releasable fixing means is less than the bonding force exerted by said cement or adhesive and greater than a predetermined threshold for the forces and moments exerted by the arc of wire on the body and the corresponding dental piece, so that these releasable fixing means act as a "fuse" between the body of the support, where the groove is defined, and the cement or adhesive that joins the support to the tooth.

Patent ES-A-2154179 discloses an orthodontic support of variable groove in which, on a support provided with a fixed groove, a set of flexible steel sheet bent in a manner that follows the contours of the vestibular face is incorporated and the groove, forming elastic side fins with profusions that fit into lateral grooves of the support. Thus, the steel sheet assembly can be plugged in. on the support providing a new slot. The provision of sets of sheets of different thicknesses provides different interchangeable slots for the same support although it does not allow to achieve the degree of precision that is achieved with a single slot properly machined with a suitable geometric configuration. In addition, in this patent ES-A-2154179, the grip fins for ligation of the wire arch are supportive of the support, so that any excessive force would be detrimentally transmitted to the dental part or tear off the cement, even if there was one such interposed blade assemblies. Patents EP-A-0727192, EP-A-0884027, US-A-5358402, US-A-

5429499 and US-A-5816801 describe different orthodontic supports that have in common a body of a synthetic or ceramic material, similar in appearance to the tooth, and a metal insert that defines the groove constituting a reinforcement that provides sufficient mechanical resistance to the material of the Body. However, none of these patents describes or suggests that such inserts be removable or changeable or that the wire arc be linked to the inserts.

Brief Exposure of the Invention According to a first aspect, the present invention provides an orthodontic support comprising a body with at least one groove defined in the vestibular face thereof to receive said wire arch; a base piece with a seating portion adapted to the shape of said dental piece for fixing thereto by means of a cement or adhesive; and releasable fixing means for removably fixing said body to said socket piece so that they are mutually assembled forming a single unit that allows the said corrective forces to be transmitted on the tooth without there being relative movement between the body and The socket piece. Conventional fastening means are provided to hold the wire arch in said groove, so that said wire exerts corrective forces on the body, the body transmits them to the plinth piece and this, through the cement or adhesive, transmits them to said dental piece with the desired therapeutic purposes. Said releasable fixing means comprise a plug-in coupling and are designed in such a way that a force necessary to release them, that is, to separate the body from the socket, is less than the bonding force exerted by said cement or adhesive and greater than a predetermined threshold for forces and moments exerted by the wire arch over the body. Thus, any excessive force applied on the wire arch or on the support will result in the separation of the body from the plinth piece while said plinth remains fixed in position on the corresponding dental piece without altering the cement or adhesive. When this occurs, the patient himself is able to press on the body to reconnect it to the socket on the socket. If said detachment is repeated, it will be indicative that the force applied is excessive and the physician must take appropriate measures. That is, the use of the orthodontic support according to the invention also allows the applied forces to be monitored. Said support also allows replacing the information-bearing portion (orientation, geometry and groove section characteristics) of one support with another with different information, in a simple way without the need to lower, clean and cement again the piece of plinth.

Preferably, the fixing means, both of the socket piece and the base portion of the body, have a regular polygonal configuration that makes it possible to remove the body, rotate it at a certain suitable angle and reinsert it into the socket piece. By arranging on the vestibular face of the body two or more grooves of different characteristics, crossed at suitable angles, one groove can be replaced by another by a simple rotation of the body in the socket.

The releasable fixing means of the plinth piece are advantageously used to temporarily fix an auxiliary positioning tool that helps to support and position the plinth piece with respect to said dental piece during the operation of fixing to the dental piece by means of the cement or adhesive .

It is clear that the orthodontic support of the present invention provides a number of advantages, among which are: - greater ease of fixing, since it is easier to fix only the base piece than an entire support;

- possibility of reassembly of the body-socket pair in case of accidental separation of the pampering by forces not derived from the wire, avoiding the need to re-cement the usual, single piece support;

- force control action, since the fixing means between the body and the socket part act as a "fuse" preventing the transmission of excessive forces to the dental piece;

- reduction or elimination of the risk of detachment or reduction of the support, with the consequent reduction of abrasion due to cleaning operations prior to a new cementing;

- Possibility of applying individualized information to each tooth in a very simple way by changing bodies with different information without having to act on the rest of the supports or to extract the wire arch;

- availability of multiple slots of different characteristics due to variation of the position of the body with respect to the base piece or replacement of one body by another without lowering the base part; Y

- possibility of implementing a new procedure for placing the wire arch on orthodontic supports, the procedure of which is part of the present invention and is set forth below.

According to a second aspect, the present invention provides a method of placing a wire arch on orthodontic supports using the supports described above in relation to the first aspect of the invention.

Said process comprises the steps of: a) providing a number of orthodontic supports in accordance with said first aspect of the invention; b) insert the wire arc into the respective grooves of the bodies and fasten in a manner capable of sliding the wire arc into the groove of each body by means of fastening means; c) joining, in a required position, each of said plinth pieces to their corresponding dental piece by means of said cement or adhesive; d) present the wire arch with the bodies attached to it in front of the socket pieces attached to the pieces β dental and slide the bodies over the wire arch until each body faces its corresponding socket; and e) press the bodies against their corresponding socket pieces to fix them to them by pressurized plug by means of said releasable fixing means. This procedure allows, for example, the manufacturer to supply the wire arch with all the linked support bodies so that it can slide so that the orthodontist only has to fix the plinth pieces and then attach the bodies and the wire arch through a simple operation. A conventional ligature element in the form of an elastic ring can be used for the means of fastening the wire arc to the grooves of the bodies, the elasticity of which is such that the resulting ligature allows the said sliding of the bodies along the Wire arch before fixing it to the socket pieces and at the same time serves as a definitive ligature when the bodies have been fixed to the socket pieces. If, on the other hand, a ligature element in the form of a metallic wire, also conventional, is used, it is necessary to twist the ends of said metallic wire together to a first point such that the resulting ligature allows the said sliding of the bodies along the Wire arch before fixing it to the socket pieces, and then tighten the twist to a second point of definitive ligation when the bodies have been fixed to the socket pieces.

Explanation of the drawings

The invention will be better understood from the following detailed description of an exemplary embodiment with references to the attached drawings, in which: Fig. 1 is an exploded perspective view of a body and a plinth piece forming the orthodontic support of the present invention; Fig. 2 is a perspective view of the body and socket part of the support of Fig. 1 once assembled; Fig. 3 is a cross-sectional view of the assembled bracket of Fig. 2; Fig. 4 is a cross-sectional view similar to that of Fig. 3 but with a variant in the removable fixing means between the body and the plinth piece; Fig. 5 is a perspective view showing the use of a force application tool to release the releasable fixing means; and Figs. 6 to 8 are schematic plan views illustrating the process of the present invention.

DETAILED DESCRIPTION OF EXAMPLES OF EMBODIMENTS OF THE INVENTION Referring first to Fig. 1, the orthodontic support of the present invention is generally indicated by reference numeral 1, and comprises a body 2, with at least one groove 3 defined on the vestibular face of said body 2 to receive a wire arch 4 (see Figs. 3, 4 and 6-8) and a socket piece 8, provided with a seat portion 9 adapted to the shape of said dental piece D (see Figs. 3, 4 and 6-8) for fixing thereto by means of a cement or adhesive 10. To removably fix the body 2 to said socket part 8, releasable fixing means are provided 11, 12, by means of which the body 2 and the socket piece are mutually assembled forming a single unit that allows transmitting corrective forces exerted by said arc of wire on the tooth without there being relative movement between the body 2 and the socket piece 8.

In the exemplary embodiment illustrated in Figs. 1 to 3, body 2 has two of said grooves 3 with a purpose that will be explained below.

For securing said wire arch 4 in said groove 3, conventional clamping means 5, 7 are provided, which comprise ligation fins 5 that act as a handle for a plastic deformable ligature element 7 (Figs. 3 and 4). or elastically to ensure such support. Thus, said wire 4, depending on the position and geometry of the groove and the section of the wire itself, exerts forces on the body 2 that are transmitted to the base piece 8 and finally to the dental piece D, with therapeutic purposes. Said releasable fixing means 11, 12 comprise elastic walls 11, which are raised from said seat portion 9 defining an open cavity 12 capable of receiving a base portion 6 of the body 2. releasable fixation 11, 12 preferably include coupling closure elements of form 14, 15 that can be released by virtue of an elastic deformation of the walls 11, whether produced by the effect of a force exerted on the body 2 or directly on said elastic walls 11. In any case, these releasable fixing means 11, 12 are designed such that a force necessary to release them is less than the bonding force exerted by said cement or adhesive 10 and greater than a predetermined threshold for forces and moments exerted by the wire arch 4 on the body 2. In this way, an excessive force applied on the wing arch Wicker 4 or on body 2 would release the body 2 of the socket piece 8, which would remain fixed to the dental piece D by the cement or adhesive 10. Thus, if the excessive force is due to a temporary eventuality, such as a blow or a chewing action, the body 2 can be easily inserted back into the socket 8 by a simple pressure, even by the patient himself. If the excessive force is due to inadequate assembly conditions, the body 2 will not be maintained in the socket piece 8 preventing the transmission to the dental part of inappropriate forces that could be harmful, the patient having to go to the orthodontist to correct the anomaly. Therefore, the orthodontic support 1 of the present invention acts as a "fuse" against excessive forces, avoiding major evils. The aforementioned form closure elements 14, 15 comprise, according to a variant shown in Figs. 1 to 3, a gap, such as an elongated groove 14, disposed on each of said elastic walls 11 to accommodate a corresponding protuberance, such as a bead 15, arranged on each of the faces of the base 6. It is evident that such shape coupling elements could adopt a multitude of configurations, an inverse arrangement being possible in which the gaps are in the body 2 and the protuberances in the walls 11. In Fig. 4 another possible variant is shown for these closure elements by form coupling, consisting of an inclination of the elastic walls 11, into said cavity, in cooperation with a progressive widening of the base 6. The construction of The illustrated plinth piece comprises a first die-cut sheet piece, of an elastic and stainless material, which, duly bent, forms a bottom for the cavity 12 from whose edges the walls 11 are lifted that are finished off in tabs 16 (the utility of which will be explained below), and a second piece, of a more rigid and equally stainless material, which configures said seat portion 9 in the form of a plate. Both first and second pieces are welded or bonded together.

It is advantageous to provide both the cavity 12 of the socket piece 8 and the base portion 6 of the body 2 with a regular polygonal cross-section. Thanks to this, the body 2 can be selectively fixed to the socket piece 8 in several different positions, each rotated at a certain angle with respect to the previous one. This makes it possible to arrange at least two of said grooves 3 on the vestibular face of the body 2, in cross-arrangement, and selectively use one or the other by placing the body 2 in one or the other of at least two suitable positions among the various possible positions.

In the orthodontic support 1 illustrated in the figures, both the cavity 12 of the plinth piece 8 and the base portion 6 of the body 2 are square in cross-section and the body 2 comprises two of said grooves 3, in cross-arrangement. Each slot 3 has orientation and section characteristics that determine different magnitudes for said corrective forces and moments. Thus, the body 2 is capable of being selectively fixed to the socket piece 8 in four different positions, each rotated 90 ° with respect to the previous one, the magnitudes of the forces and inverse moments being in the positions rotated 180 ° to each other. Each of the elastic walls 11 comprises at its distal end a cantilever flange 16, adapted to receive a force exerted voluntarily to elastically deform the wall 11 and facilitate a release of said closure elements by way of coupling 14, 15 with a minimum force exerted on the body 2. A tool 18 shown for the application of said force exerted voluntarily is shown in Fig. 5.

Said tool 18 is provided with a handle 20 from which several elastic wires 21 start, one for each flange 16. The said elastic wires 21 have a stop 22 near their end 19. Each flange 16 is provided with at least one depression or hole 17 suitable for receiving said end 19 of a tool 18. A force exerted on the tool 18 will be transmitted by the elastic wires 21 and stops 22 to the flanges 16 to flex the elastic walls 11 outward and release the fixing means 11, 12. It is evident that this operation is carried out with the body 2 placed between the elastic wires 21, although for clarity of the drawing it has not been shown in Fig. 5. When the wire arch 4 is inserted in the groove 3 and connected to the body 2 a tool with only two elastic wires (not shown) can be used to flex only those elastic walls the access to whose flanges is not hindered by the wire arch, or The elastic wires can have a sinuous end portion to access the flanges surrounding the wire arch 4.

However, the said releasable fixing means by plug-in coupling are not limited to said elastic walls 11. According to an exemplary embodiment not shown, the releasable fixing means comprise rigid walls that start from said seat portion 9 and they define an open cavity 12 suitable for receiving by plug-in connection the body 2. Both said rigid walls and the corresponding sides of the body 2 are substantially perpendicular to the same plane and the body 2 precisely adjusts in the cavity 12 being here assembled by friction. According to another exemplary embodiment not shown, the releasable fixing means comprise, as in the previous example, rigid walls that start from said seat portion 9 and define an open cavity 12 suitable for receiving by plug-in connection the body 2. However, a small clearance is provided between the body 2 and the rigid walls in which a sheet of liquid is interposed, preferably an innocuous aqueous liquid, whose surface tension cooperates in the retention of the body 2 in the cavity 12 . It should be noted that any of the designs described above for fixing means 11, 12 could be reversed without substantially altering their qualities. That is, for example, the elastic walls 11 could protrude inferiorly from the body 2 defining a cavity for receiving a plug (not shown) integral with the seat portion 9 of the socket piece 8, etc.

In any case, and whatever the design chosen for said releasable fixing means 11, 12, it is very advantageous that a force necessary to release them is less than the bonding force exerted by said cement or adhesive 10 and greater than a threshold predetermined for forces and moments exerted by the arc of wire 4 on the body 2. These forces and moments are relatively low and said threshold can be located at the maximum permissible value from a therapeutic point of view. This ensures that the appropriate corrective forces exerted by the wire arch 4 are transmitted to the dental part while preventing an excessive mounting force of the wire arch 4 from being transmitted to the tooth part D or that an excessive force applied to the wire 4 or to body 1 tear off the cemented junction of socket piece 8 to tooth part D.

Referring now to Figs. 3 and 4, the body 2 of the support 1 according to the invention includes, for fastening the wire arch 4 in said groove 3 of the body 2, ligation fins 5 that act as a handle for a ligating element 7, the which is passed over the arc of wire 4 and below said ligation fins 5. These fastening means 5, 7 are conventional and there are two generalized types of ligation elements 7. A first type is plastically deformable, such as a piece of wire, and a second type is elastically, such as a rubber ring, to ensure said fastening.

The orthodontic support 1 of the present invention may also include, as is conventional, at least one force arm 23 (Figs. 1 and 2), protruding laterally therefrom, which is used for certain corrective applications independent of the wire arch 4 However, here, since the forces applied to force arm 23 are relatively major, said force arm 23 is integral with the socket 8 so as not to influence the forces and moments exerted by the wire arch 4.

Another advantage of the support 1 of the present invention is that it is easier to cement only the plinth piece 8 than a complete conventional support. In addition, the existence of the releasable fixing means 11, 12 is used to attach an auxiliary positioning tooling (not shown) that helps to support and position the plinth piece 8 with respect to said dental piece D during the part fixing operation from base 8 to the dental part D by means of cement or adhesive 10. The characteristics of the orthodontic support 1 of the present invention give rise to the implementation of a new method of placing a wire arch on orthodontic supports, which is described below. with reference to Figs. 6 to 8. The method comprises, firstly, providing a number of orthodontic supports 1 in accordance with the present invention, that is, as described above in relation to Figs. 1 to 5. Next (Fig. 6) insert an arc of wire 4 into the respective grooves 3 of the bodies 2 and securely fasten the arc of wire 4 in the groove 3 of each body 2 by means of said means clamping 5, 7. This operation can be carried out taking into account the order of the bodies 2 but not the distances between them. On the other hand, to attach, in a required position, each of said socket pieces 8 to their corresponding dental piece D by means of said cement or adhesive 10. To perform this operation, the positioning tooling referred to above can be advantageously used , and which allows to hold and position each socket piece 8 with respect to the corresponding dental piece D using said releasable fixing means 11, 12. Once the socket pieces 8 have been fixed to the dental pieces D, present (Fig. 7) the wire arch 4 with the bodies 2 attached to it in front of the socket pieces 8 and sliding the bodies 2 over the wire arch 4 until each body 2 faces its corresponding socket piece 8. Finally, just press (Fig. 8) the bodies 2 against their corresponding socket parts 8 to be fixed thereto by pressure plug by means of said releasable fixing means 11, 12. This procedure allows the manufacturer to supply the wire arch 4 with all the required bodies 2 placed and fastened thereto in the aforementioned way susceptible to sliding to facilitate subsequent releasable fixing to the socket parts. This fastener that can slide and the subsequent definitive support are achieved differently depending on the type of ligature elements 7 used. When an elastic-type ligature element 7, such as a rubber ring, is used, the step of holding the wire arc 4 in a manner capable of sliding comprises passing the elastic ring 7 above the wire arch 4 and below the ligating fins 5 protruding laterally from the body 2, taking into account that the elasticity of said ligating element 7 is such that the resulting ligature allows the said sliding of the bodies 2 along the wire arch 4 before its fixation to the plinth pieces 8 and at the same time it serves as a definitive ligation when the bodies 2 have been fixed to the plinth pieces 8. If, instead, plastically deformable ligating elements are used, such as pieces of metallic wire, the aforementioned step of fastening in a manner capable of sliding comprises passing said metallic wire over the arc of wire 4 and under the linking wings 5 and twisting the two ends together os of said piece metal wire to a first point such that the resulting ligature allows the said sliding of the bodies 2 along the wire arch 4, before being fixed to the socket pieces 8. When the bodies 2 are in their definitive position, for example when the bodies 2 have been fixed to the plinth pieces 8, said twist is tightened to a second point that provides a definitive ligation. Although the invention has been described with references to specific embodiments, it is not limited thereto, the scope of the present invention being defined by the appended claims.

Claims

1. Orthodontic support, to be used in an orthodontic treatment with a wire arch (4), whose orthodontic support (1) is of the type comprising: a body (2) prepared to be fixed by a base portion (6 ) to a dental piece (D) by means of joining; at least one groove (3) defined in the vestibular face of said body (2) to receive said wire arch (4); and fastening means (5, 7) for fastening said wire arch (4) in said groove (3), so that said wire (4) exerts corrective forces on said dental piece (D) for therapeutic purposes, characterized in that said means for joining the body (2) to a dental piece (D) comprise: a socket piece (8) with a seating portion (9) adapted to the shape of said dental piece (D) for fixing to the same by means of a cement or adhesive (10); and releasable fixing means (11, 12) for removably fixing the body (2) to said socket piece (8), which are mutually assembled forming a single unit that allows the said corrective forces to be transmitted on the tooth without that there is relative movement between the body (2) and the socket piece (8).

2. Support, according to claim 1, characterized in that the releasable fixing means (11, 12) comprise elastic walls (11), which rise from said seat portion (9) defining an open cavity (12) capable of receiving the said base portion (6) of the body (2) tightly fitted, being a necessary force to release said releasable fixing means (11, 12) less than the bonding force exerted by said cement or adhesive (10) and greater than a predetermined threshold for forces and moments exerted by the wire arch (4) on the body (2).

3. Support, according to claim 2, characterized in that the releasable fixing means (11, 12) also include closing elements by way of coupling (14, 15) capable of being released by virtue of an elastic deformation of the walls (11), whether produced by the effect of a force exerted on the body (2) or directly on said elastic walls (11) .

4. Support, according to claim 3, characterized in that said closure elements by form coupling (14, 15) comprise at least one recess (14) disposed in each of said elastic walls (11) to accommodate a corresponding protuberance (15) arranged on each of the faces of the base (6).

5. Support, according to claim 3, characterized in that said closure elements by form coupling comprise an inclination of the elastic walls (11) into said cavity, in cooperation with a progressive widening of the base (6) .

6. Support, according to claim 4 or 5, characterized in that both the cavity (12) of the socket piece (8) and the base portion (6) of the body (2) are of regular polygonal cross-section and because the body (2) comprises at least two of said grooves (3) in cross-arrangement, whereby the body (2) is capable of being selectively fixed to the socket piece (8) in several different positions, each rotated a certain angle

7. Support, according to claim 4 or 5 characterized in that both the cavity (12) of the plinth piece (8) and the base portion (6) of the body (2) are square in cross-section and because the body (2) comprises two of said grooves (3) in cross arrangement, whereby said body (2) is capable of being selectively fixed to the socket piece (8) in four different positions, each rotated 90 ° with respect to the previous one, each slot (3) presenting orientation and section characteristics that determine said corrective forces, which are reversed in the positions rotated 180 ° to each other.

8. Support, according to claim 3, characterized in that each of the elastic walls (11) comprises at its distal end a cantilever flange (16) adapted to receive a force exerted voluntarily to elastically deform the wall (11) and facilitate a release of the aforementioned closure elements by coupling form (14, 15) with minimal force exerted on the body (2).

9. Support, according to claim 8, characterized in that each flange (16) is provided with at least one depression or hole (17) capable of receiving an end (19) of a tool (18) for applying said force voluntarily exercised

10. Support, according to claim 1, characterized in that said releasable fixing means comprise walls that start from said seat portion (9) and define an open cavity (12) suitable for receiving by coupling to plug the body ( 2), which is assembled by friction, being a force necessary to release said releasable fixing means (11, 12) less than the bonding force exerted by said cement or adhesive (10) and greater than a predetermined threshold for forces and moments exerted by the wire arch (4) on the body (2).

11. Support, according to claim 1, characterized in that said releasable fixing means comprise walls that start from said seat portion (9) and define an open cavity (12) suitable for receiving by coupling to plug the body ( 2), which is retained with the cooperation of a surface tension of a sheet of liquid interposed between said walls and body (2) being a force necessary to release said releasable fixing means (11, 12) less than the bonding force exerted by said cement or adhesive (10) and greater than a predetermined threshold for forces and moments exerted by the wire arch (4) on the body (2).

12. Support, according to claim 1, characterized in that said fastening means (5, 7) for fastening the wire arch (4) in said groove (3) comprise ligation fins (5) that act as handle for a ligature element (7), which is plastic or elastically deformable to ensure said fastening.

13. Support, according to claim 1, characterized in that said socket (8) includes at least one force arm protruding laterally therefrom.

14. Support, according to claim 1, characterized in that said releasable fixing means (11, 12) are capable of being coupled to an auxiliary positioning tool for holding and positioning the socket piece (8) with respect to said dental piece (D) during an operation of fixing the socket piece (8) to the dental piece (D) by said cement or adhesive (10).

15.- Procedure of placing a wire arch on orthodontic supports, characterized in that it comprises the steps of: a) providing a number of orthodontic supports (1), each of them being composed of: a body (2) with at least a groove (3) defined in its vestibular face to receive said wire arch (4); a base piece (8) that includes a seat portion (9) with a surface adapted to the shape of a dental piece (D) for fixing thereto by means of a cement or adhesive

(10); and releasable fixing means (11, 12), by pressurized plug, for releasably fixing the body (2) to said socket part (8); b) insert the wire arc (4) into the respective grooves (3) of the bodies (2) and securely fasten the wire arc (4) into the groove (3) of each body (2) by fastening means (5, 7); c) joining, in a required position, each of said socket pieces (8) to their corresponding dental piece (D) by said cement or adhesive (10); d) present the wire arch (4) with the bodies (2) attached thereto to the socket pieces (8) attached to the dental pieces (D) and slide the bodies (2) over the wire arch (4) ) until each body (2) faces its corresponding socket piece (8); and e) press the bodies (2) against their corresponding socket pieces

(8) to fix them thereto by pressure plug by means of said releasable fixing means (11, 12).

16. Method according to claim 15, characterized in that said step of fastening in a manner capable of sliding by said fastening means (5, 7) comprises passing a ligating element (7) in the form of an elastic ring over of the wire arch (4) and below ligation fins (5) protruding laterally from the body (2), the elasticity of said ligation element (7) being such that the resulting ligature allows said bodies to slide (2) along the wire arch (4) before fixing it to the plinth pieces (8) and at the same time it serves as a definitive ligation when the bodies (2) have been fixed to the plinth pieces (8) .

17. Method according to claim 15, characterized in that said step of fastening in a manner capable of sliding by said fastening means (5, 7) comprises passing a ligature element (7) in the form of metal wire over of the wire arc (4) and below ligation fins (5) that protrude laterally from the body (2) and jointly twist the ends of said metal wire to a first point such that the resulting ligature allows the said sliding of the bodies (2) along the wire arch (4) before being fixed to the socket pieces (8), said twist being then tightened to a second point of definitive binding when the bodies (2) have been fixed to the socket pieces

(8).

18. Method according to claim 15, characterized in that step c) includes the operation of temporarily fixing a positioning tool to the socket piece (8) using said releasable fixing means (11, 12) to hold and position the socket piece (8) with respect to the corresponding dental piece (D).