WO2019023775A1

WO2019023775A1 - Thermomouldable orthodontic appliance and manufacturing method

Info

Publication number: WO2019023775A1
Application number: PCT/BR2018/050259
Authority: WO
Inventors: Diego Rivero TAMES
Original assignee: Tames Diego Rivero
Priority date: 2017-08-02
Filing date: 2018-07-27
Publication date: 2019-02-07
Also published as: BR102017016572A2

Abstract

The present invention relates to a thermoformable plastic appliance for retaining incisor teeth (2), comprised of a thermomouldable plastic rod (1) with holes (12) at the ends and which surrounds anteroinferior incisor teeth (2), and which comes into contact with the lingual surface of the teeth (2) and is glued to the lingual surface of only the canine teeth (21) or even of the incisor teeth (2), and the plastic rod (1) has a width that is smaller than the height of the lingual surface of the incisor (2) and canine (21) teeth, and attachment of the rod (1) can optionally be through magnetic force using magnets (73 and 71) attached to the rod (1) while ferrous metal blocks are glued to the lingual surface of the incisor (2) and canine (21) teeth.

Description

ORTHODONTIC APPARATUS MOLDABLE TERM AND METHOD OF CONFECTION

[001] It is an Orthodontic Apparatus that falls into the category of containment devices of the lower incisor teeth, being supported by adhesion only to the lower canine teeth. Uses a thermoformable plastic bar with holes in the ends for adhesion to the canines. Available in a plurality of pre-contoured sizes, to be selected according to the patient's individual dimensions and adapted to the dental anatomy by thermal plastification and pressure against the plaster model.

[002] When a patient undergoes orthodontic treatment, the teeth and bite configurations are realigned in a series of stages. Each stage represents a new pattern or dental configuration that will eventually lead to an adequate final positioning of the entire dentition. The progress from the initial configuration through the intermediate stages and finally to the final configuration can be achieved using any one or a combination of different dental appliances. Of particular interest to the present invention, many of these devices can be made using a dental mold representing the dental configuration of the patient. The mold is made of gypsum or the like.

[003] Once orthodontic treatment is completed, when all teeth are in the best aesthetic and functional position, there is a need to stabilize the dental arch to prolong the benefits of the treatment. This is achieved by immobilizing the teeth for a long period of time. This stage, called the contention phase, is common and necessary for all orthodontic treatment techniques, as there is a natural tendency for the teeth to return to the initial position. In this way, containment devices constitute mechanical barriers that resist the pressure exerted by the teeth in the direction of the initial position.

The tendency of recurrence of dental malposition, although always occurs, varies according to factors such as age, type of initial change, dental group affected in addition to individual response. The knowledge of these factors helps the professional in the specific choice of type of containment device, which can be fixed or removable. With regard to teeth, the lower incisors are known to be a group with a high tendency to recur, presenting lower levels of posttreatment position stability. This has been instrumental in the widespread use of fixed containment devices in this region of the dental arch. These devices usually involve the 6 lower anterior teeth (canine to canine) and can be glued to the lingual (tongue-facing) surfaces of all or only the canines.

One of the desirable characteristics of the lower fixed containment devices (from canine to canine) is the good adaptation to the dental anatomy, which is highly complex, with surfaces rich in details. This anatomy can hardly be copied by manual folding of metal wires, as in the conventional technique, compromising the adaptation and the ability to mechanically stabilize these teeth. The metal wires usually have a circular section, producing punctual or at most linear contacts with the surface of the tooth. The use of thermoformable plastic orthodontic appliance, such as that described in patent document published under number US20080206701, is not suitable for immobilizing the teeth for a long period of time. These devices provide difficult chewing because they cover the upper part of the teeth; lack of hygiene due to the difficulty of removing food that penetrates the edges of the appliance. They cause discomfort and affect the user's speech by the volume of space occupied. Still, they have an undesirable aesthetic effect because they cover the front of the teeth.

The orthodontic apparatus described in this report comprises a thermoformable apparatus and the method of manufacture thereof employs a thermoformable plastic bar on a manipulable or reconfigurable mold to model the patient's dentition and gum in the containment and immobilization phase of teeth for a long period of time. The plastic bar of the revealed device involves the 6 anterior-inferior teeth (from canine to other canine), and can be glued on the lingual surface (facing the tongue) of all teeth or only the canines.

The accompanying drawings and the detailed description which follows are merely given by way of example, as said apparatus and method of production may be designed by other known engineering solutions. Therefore, specific structural and functional details disclosed herein should not be construed as a limitation, but only as a basis for the claims; acts as a representative basis for teaching an expert in the art of employing and putting into practice the development of the object and method described in this report, based on the constructive arrangement detailed below.

Figure 1 shows a set of apparatuses, with the plastic bar (1) of variable sizes, staggered.

Figure 2 shows the bonding surface (11) positioned at the end of the bar (1). The surface (11) has a through hole (12).

Figure 3 shows the bar (1) positioned surrounding the 6 anterior-inferior teeth (canine to canine), glued to the lingual surface of all teeth (2) or only to canines (21).

Figure 4 shows the clamp (3) for securing the rod (1) to the canine tooth (21).

Figure 5 shows the clamp-type clamp (4) with handle (42) for securing the rod (1) to the canine tooth (21).

Figure 6 shows shoe (32) of the clip (3) superimposed on the surface (11) of the bar (1).

Figure 7 shows the bar (1), positioned around the lower anterior teeth (2), and the shoe (32) of the clip (3) superimposed on the surface (11) of the bar (1) positioned on the lingual surface of the fingers teeth (2) and the canines (21).

Figure 8 shows the bar (1), positioned surrounding the lower antero teeth (2), and the two shoes (32) of the clip (3) superposed respectively on the surfaces (11) of the positioned bar (1) on the lingual surface of the teeth (2) and the canines (21).

Figure 9 shows the Thermoforming Instrument (5) with the pressure rollers (52). Figure 10 shows the bar (1), positioned wrapped around the lower anterior teeth (2), and shows the thermoforming instrument (5) acting on the bar (1) heated by the mold temperature guide (6) .

Figure 11 shows the bar (1) positioned and glued on the lingual surface of all teeth (2) or only the canines (21).

Figure 12 shows, in cross-section, firstly the magnet 71 adhered to the end of the bar 1 and the ferrous metal 72 glued to the canine tooth 21 and at the second moment shows the fixed magnet 71 by magnetic force on ferrous metal

(72).

Figure 13 shows a three-dimensional view of the magnet (71) adhered to the end of the bar (1) and the ferrous metal (72) adhered to the canine tooth (21).

Figure 14 shows the bar (1) positioned enclosing the 6 lower anterior teeth (from canine to the other canine), fixed by the magnetic force of the magnets (71) only on the canines (21).

Figure 15 shows the bar (1) positioned enclosing the 6 anterior-inferior teeth (from canine to other canine), fixed by the magnetic force of the magnets

(73) on all teeth (2) and fixed by the magnetic force of the magnets (71) only on the canines (21).

The present invention falls within the category of containment, being supported by adhesion, preferably only to the lower canine teeth (21). It uses a thermoformable plastic bar (1) with holes (12) in the end surfaces (11) for adhesion to the canines (21). It has a width less than the height of the lingual surface of the incisor and canine teeth (2). The straight section of the plastic bar (1) may have a circular, semicircular geometric shape or polygonal. Available in 5 pre-contoured sizes, shown in figure 1, to be selected according to the patient's individual dimensions and adapted to the dental anatomy by thermal plastification and pressure of the plastic rod (1) against the plaster model, with the aid of the Instrument (5 ) of thermoforming.

The lower arch molding may be partial, comprising at least the teeth comprised between the first lower premolars. The model can be made in type IV gypsum (special) to guarantee better fidelity and resistance.

The bar attachment clamp 3 on the canine tooth 21 shown in Figure 4 has a stem 31 with a shoe 32 at the end and the base of the shoe 32 has a shoulder ( 33). The raised shoulder has a profile sufficiently equal to the bore 12 of the surface 11 of the ends of the bar 1, ensuring the efficiency of the engagement. The opposing end of the stem (31) has a spring-loaded ball joint (35) which presses the outer lever (34). With the same function of pressing the bar (1) on the canine tooth (21), at the time of gluing, the clamp-type clamp (4) with handle (42) is shown in figure 5. With the thermoplastic thermoplastic bar 1 positioned in the mold, it is heated and with the aid of the thermoforming Instrument 5 with pressure rollers 52 shown in Figure 9, the plastic bar 1 is pressed against the teeth until the shape formed by the profile of the teeth is sufficiently formed. The thermoforming tool (5) is manually operated with the aid of a handle (51). The rollers 52 are spaced apart, forming a groove 53 for engaging the plastic bar 1. The method of confection and assembly of the apparatus comprises the steps, as follows:

With the aid of a measuring ruler, select the apparatus between the available sizes of bars (1), the one that more closely approximates the perimeter between the canines (21), without exceeding this measure.

Position the bar (1) in the occlusal half of the lingual faces of the incisor teeth (2).

Attaching the bar (1) using the cannister clamps (3), engaging the shoulder (33) of the two shoes (32) of the clamps (3) in the holes (12) present in the surfaces (11) of the ends of the bar (1).

Plasticizing the rod (1) using the criteria defined by the Molding Temperature Guide (6).

[0032] Firmly press the plasticized bar (1) against the teeth ensuring thermoforming of the anatomy of the lingual faces of the incisor and canine teeth (2), with the aid of the thermoforming instrument (5) with the pressure rollers (52) .

[0033] Wearing and polishing areas deemed necessary.

Bring the already shaped bar according to the dental arch into treatment, position and glue on the lingual surface of all the incisal and canine teeth (2) or only the canines (21).

With the term molding, the proposed rod (1) reproduces, quickly and accurately, all the details of the dental anatomy, allowing an excellent fit and, therefore, great capacity of containment of the teeth in the position obtained at the end of orthodontic treatment. The term molding results in a broad area of contact with the teeth, ensuring superior stabilization.

The best fit allows the appliance to be glued only on canines for most cases except in the occurrence of large-turning versions and diastema in the initial pre-treatment situation. This feature enables a very easy hygiene technique.

[0037] Another advantage is the transparency of the polymer used, which allows for aesthetic results, as well as facilitating the control of hygiene, both by the dentist and the patient. This type of material and the constructive arrangement give the apparatus good stability of shape, strength and flexibility, adapting well to the demands of mastication.

The preparation time is considerably shorter and the simpler technique due to adaptation by thermoforming can be carried out in the office itself, without having to be sent to the specialized laboratory.

The table below shows the advantages of the Object of the present Patent Application.

FIBER WIRE FIBER

METALLIC METALLIC GLASS OBJECTIVE OF THE

CRITERIA THREADED IN (COLLADO ON REQUEST OF

ONLY IN CANINE AND CANINE AND PATENT

INCISIVE INCENTIVE CANINES)

Hygiene Facilitated Difficult Difficult Facilitated

Making Difficult Difficult Difficult Easy

Adaptation Little Not applicable Not applicable Excellent

Minimum:

Broad Surface: Range

Punctual or Not applicable Not applicable Contact Contact

Linear

Resilience Rigid Rigid Rigid Flexible

Aesthetics Minimum Minimum Maximum Average A second mode of fixing the bar (1) only to the canines (21) or fixing the bar (1) also to the incisor teeth (2) is done by the use of the magnetic force. As shown in Figure 12 and 13, first magnets 71 are glued to the ends of the bar 1 and ferrous metals 72 are glued to the canine teeth 21. The magnet 71 is secured by magnetic force to the ferrous metal 72, as shown in Figure 14. To increase and distribute the fastening force, magnets 73 are bonded along the bar 1 and ferrous metal blocks are glued on the incisor teeth (2), as shown in Figure 15.

Claims

1 . A thermosetting thermoforming apparatus is a thermoformable plastic apparatus for containing the incisor teeth (2), characterized by a thermoformable plastic bar (1) with holes (12) passing through the ends and surrounding the incisor teeth (2), anteroinferior, and which has contact with the lingual surface of the teeth (2) and is glued to the lingual surface only of the canines (21) and the plastic bar (1) has a width smaller than the height of the lingual face of the incisor and canine teeth (2) ( 21);

The thermoforming device according to claim 1, characterized in that it comprises a clamp (3) for securing the rod (1) to the canine tooth (21), and the clamp (3) has a stem (31) with a shoe (32). ) at the end and the base of the shoe (32) has a raised shoulder (33) with a profile sufficiently equal to the bore (12) of the surface (11) of the ends of the bar (1) and the opposite end of the stem (31) (35) having a spring effect compressing the external lever (34);

A method of manufacturing and assembling the apparatus disclosed in claim 1, characterized in that it comprises the following steps:

^■ With the help of a ruler, select the appliance between the available sizes of bars (1), the one closest to the perimeter between the canines (21), without exceeding this measure;

- Position the bar (1) in the occlusal half of the lingual faces of the incisor teeth (2); - Fixing the bar (1) using the cannister clamps (3), engaging the shoulder (33) of the two shoes (32) of the clamps (3) in the holes (12) present in the surfaces (11) of the ends of the bar );

^■ Plasticizing the rod (1) using the criteria defined by the Molding Temperature Guide (6);

- Firmly press the plastic rod (1) against the teeth, ensuring, by means of the thermoforming tool (5), the thermoforming of the anatomy of the lingual faces of the incisal and canine teeth (2) with the rollers (52) of pressure;

- Weeding and polishing areas deemed necessary;

- Carrying the rod (1) already conformed according to the dental arcade under treatment, positioning and gluing on the lingual surface of all the incisor teeth (2) or only the canines (21);

The thermoplastic orthodontic apparatus characterized by the fixing of the bar (1) being through the use of magnetic force and having magnets

(71) glued to the ends of the bar (1) and ferrous metals (72) bonded to the canine teeth (21) and the magnet (71) is secured by magnetic force to the ferrous metal

(72);

The thermoformable device according to claim 3, with the rod (1) fixed to the canine teeth (21), characterized in that the rod (1) is also fixed to the incisal teeth (2) by the use of the magnetic force , and have magnets (73) glued along the bar (1) and have ferrous metals bonded to the incisal teeth (2), and the magnets (73) are secured by magnetic force to the ferrous metals bonded to the incisive teeth (2).