WO1998004206A1

WO1998004206A1 - Kit for modelling orthodontic arches and inserting first and second orders folds on orthodontic wires

Info

Publication number: WO1998004206A1
Application number: PCT/IT1997/000168
Authority: WO
Inventors: Ermanno Celestino
Original assignee: Ermanno Celestino
Priority date: 1996-07-26
Filing date: 1997-07-15
Publication date: 1998-02-05
Also published as: IT1284233B1; ITRM960533A0; ITRM960533A1

Abstract

The invention concerns a kit for modelling orthodontic wires, including a first tool (1) to make first order folds and a second tool (11) for modelling orthodontic arches, said first tool (1) including two arms (2, 3), reciprocally opposite and extending in opposite directions and disposed on the edges of two supports (5, 6) supported, in their turn, by elements of handle reciprocally hinged in order to obtain a pliers movement between the above mentioned arms (2, 3) and said second tool (11) including a substantially semicylindrical structure (13) with a flat side and a semicircular side. Besides, there is a third tool (21) for realisation of second order folds having a part of die (22) in the shape of ladder with at least two steps, and a part of back die (23). These parts of die (22) and back die (23) are supported by handle elements with pliers action.

Description

DESCRIPTION

KIT FOR MODELLING ORTHODONTIC ARCHES AND INSERTING FIRST AND SECOND ORDERS FOLDS ON ORTHODONTIC WIRES

The present invention concerns a kit able to modelling orthodontic arches and inserting folds of l^sl and 2^nd order on orthodontic wires.

All the experts of the branch, and particularly the orthodontic technicians know that at present the forming of the arches in round wire and of the folds of l ^sl and 2^nd order is based essentially on the operator's skill.

There are essentially two ways to make the forming of the arches on an orthodontic wire: a) through the aid of a turret on which the wire is placed and then modelled; b) through the aid of round and square-nose pliers, or square-nose pliers.

In this case the following technique is used: the wire is held with the pliers in one hand and with one finger of the other hand the forming of the wire is tried by inserting a bend. Once the arch has been obtained, this one is overlapped to that represented on Dr Boone's paper and they must perfectly fit.

The main limit of this technique is that it implies a great manual skill and therefore only very skillfull hands succeed in getting good results. To avoid this obstacle, some preformed arches are at disposal in commerce with a great economical expense. For the forming of the 1 ^st order folds Dr boone's paper is taken as reference by marking the inter-canine and molar diameters. The forming takes place by putting the mesal and distal tips of the arch on the point shown by Dr Boone. The method is very precise in the indications , however it presents the disadvantage that the control of the folds can be carried out only overlapping the arch to the paper, therefore every time that the movement of the folding is controlled it is necessary to nip the arch again - operation that often is carried out in a point different from that of the beginning, so the symmetry of the folds comes to be very limited.

Another method used consists of modelling the wire without taking it away from the pliers in the succession of movements. Also in this case, however, the validity of the arch is related to the operator's skill.

To make the forming of 2 ^d order folds (referred to omega and vertical ansae) it is necessary to rely only on the operator's skill, helped by Nance's ladder- pliers and turret-pliers.

The difficulty in carrying out such folds lies in the fact that these are not often perfectly aligned to planes of different size and they are consequently crooked. In this context the proposed solution can be inserted according to the present invention which allows to resolve all the above mentioned problems.

In particular, with the methodology and the instruments proposed with the present invention, the wire, firmly held by proper pliers, is turned of 90° on the semicircular tool. By pulling the tool towards the operator and making the wire rub between wire and tool itself, hints of arch can be obtained with the least manuality, or arches which can be easily overlapped to BOONE's paper through a minimum of forming.

Besides,with the solution of the invention it is enough to remember the positions of the folds on an edge of the arch ( almost standard positions) and then transfer it on the other (edge), in order to obtain a notable summetry, without detaching the wire from the pliers and risking to nip the same in point different from the original.

Great advantages come from this whether in terms of time or of quality and this not only for the beginners, but also for professional men. Besides with the solution of the invention, for the realization of the folds of 2^nd order, the kit allows that such folds can be carried out with only two mechanic movements of the pliers.

With the solution of the present invention, the arches are obtained by using a tool having two faces, one of which is semicircular and the second flat, The wire is kept firm with the pliers and by moving it between finger and semicircular tool complete or sketched arches are obtained.

Always according to the invention, for the 1^st order folds we have technically a system of reference composed of two arms which can be inserted in a fixed, semifixed or mobile way on any support able to hold an orthodontic wire.

On these arms there are indications in connection of which the extremities of the wire must be placed. By bringing these extremities in the advised positions 1^st order folds can be obtained.

The 2^nd order folds are obtained through a movement of pressure between two structrures which act as die and back-die. Therefore the specific object of the present invention consists of a kit for forming orthodontic wires, including a first tool to make folds of the first order and a second tool for forming orthodontic arches, the so-called first tool includes two arms, reciprocally opposite and extending in opposite directions and disposed on the extremity of two supports supported, in their turn, by an element in the shape of pliers or by any support able to hold a wire. The so- called second tool presents a susbtantially semicylindrical structure with a fiat side and a semicircular side or tract of semicircle.

According to a preferred embodiment of the realization of the kit, a third tool can be rovided for the execution of 2^nd order folds. This is called third tool and consists of a part of a die in the shape of small ladder, with at least two steps, and a back-die supported by elements of handle with pliers or pressure action.

Furthermore, the aπns can be symmetric in foπ and/or pressure or cannot be.

Preferably, according to the invention, these two arms are perpendicularly coupled to the respective supports in a fixed, semifixed or mobile way.

Further, according to the invention, one of the above mentioned aπns presents a section connected with the coupling with the respective support, larger than that of the other arm.

On these arms some indications are provided, preferably oblique, as reference for the execution of the folds.

Always according to the invention, the above mentioned arms can be placed in an adjacent or overlapped position compared to the imaginary central line or they can be divergent one to another and with any geometric form, plane or solid, being able to stay in any point of the support, along its height, thickness or width.

Further, according to the invention, the above mentioned arms can be folding on themselves telescopically, through shear and/or screwing. The said second tool can provide a handle having any form or dimension.

Furthcrly, the said handle can be realized directly on one of the two elements of handle of the first tool.

This fiat part can have any form which adapts itself to the pliers of the kit, lo square-nose pliers, to round- and square-nose pliers.

Besides, on this tool there can be a niche for the positioning of the wire.

On this semicircular part, some notches can be furthcrly provided for the insertion of round and /or square- section wires.

As regards this third tool, towards the front of the said part of die a cylindrical prolongation can be provided, while towards the front of the said part of back-die a concave prolongation can be provided .

Always according to the invention, the said part of small ladder die can presents four or five steps.

The invention will be now described as an illustration but not a limitation, with particular reference to its favoured forms of realization shown in the figures of the drawings enclosed, in which: fig. 1 is a perspective sight of a foπn of realization of a first tool of the kit according to the invention; fig.2 is a perspective sight of a form of realization of a second tool of the kit according to the invention; and fig.3 is a perspective sight of a form of realization of a third tool of the kit according to the invention.

In the tool shown in fig. 1 , the pliers I present two arms 2 and 3 fixed to them. Obviously, the arms 2 and 3 could be fixed to a different kind of support, in a fixed, semi-fixed and mobile way.

Holding the pliers with the fiat in front of the operator the first of the two arms is placed on the left and presents, in the foπn of realization illustrated, a lenght of 60mm, a height of 4mm and a thickness of 3mm.

The sercond aπn 3 is opposed to the first and has the same dimensions of the previous except from the initial part where for a section 4 of 10mm presents a width of 6mm, that is to say higher than that of the remaining part.

Both the aπns 2, 3 are fixed to a support 5, 6 perpendicular to them for the width of 6mm, with a thickness of 1 ,2mm and a lenght of 15 mm.

Besides, the aπns 2, 3 with their external part fit perfectly with the external part of the respective support 5, 6, while on the contrary they are placed at 3 mm under the summit of the support 5, 6.

On the aπns 2,3 some indications 7, 8 are finally present and they are placed in an oblique way and follow the metric system.

It may thus be inferred that the amis are opposite and parallel either between them or with the imaginary line passing for the centre, and have definite dimensions in position , height, width and lenght and are provided of reference for the positioning of the wires.

It must be observed, however, that the first tool 1 according to the invention, as already said before, can provide arms 2, 3 in positions adjacent or overlapped to the imaginary central line and shifted for all the width of the pliers or even which overcome the 6mm of the example, and are not parallel to the central line and between themselves but are divergent either compared to the central line or between them.

The lenght of the arms 2, 3 may vary and may be superior or inferior to 60mm as the dimensions regarding width and thickness may be bigger or smaller.

In the example shown in fig. l, the position of the arms 2, 3 is 3 mm under and adjacent to the external part of the perpendicular support 5, 6 , but it is well clear how they can be above or below , external or internal of the perpendicular support. For convenience, on the arms 2,3 there are references 5, 6 of the metric system and placed in an oblique way. Obviously, instead of these references other references can be taken into consideration with orientation different from oblique, letters, colours, degrees, angles, symbols, numbers and any sign.

Further, the arms 2, 3 can be folding on themselves in any position, telescopically or through shear or screwing.

If we observe now the fig.2, the tool 1 1 , according to the invention, is shown as a semicylindrical structure with a flat side 12 and a semicircular one 13 which presents in the section of the lenght a fissure 14 in which an arm 2 or 3 is inserted in the pliers which act as a guide. Obviously, the structure of the tool 1 1 can be realized on the pliers as well.

Keeping firmly the wire in the pliers, the semicircular instrument 13 is positioned with the niche 14 on the guide (aπn 2,3) of the pliers .The wire is folded at 90° on the semicircular instrument 13. Therefore, after positioning the flat side 12 of the instrument 1 1 in contact with the flat side of the pliers 1 , the wire is pulled from 0 to 5-6 cm towards the operator, making it rub ( always at 90°) between finger and instrument according to the lenght of rubbing, arches or hints of arches are obtained.

Obviously the handle 15 can or cannot be present and in any case it can have any prehensile form. Further, the flat part 12 of the instrument 1 1 and that one which is leaned on the pliers can have any flat form on condition that it fits the form of the pliers, allowing a perfect fitting of the semicircular instrument and an optimal working of the wire.

The niche 13 which is on the wire and is leaned on the guide can or cannot be present at any height and in any section of the lenght, since it can have any form, open or closed.

An important aspect is the semicircular aspect from one side and flat from the other side of the instrument 1 1 , even though this may not be considered binding. Further, on the semicircular surface some notches can be provided (they are not shown) for the insertion either of round or rectangular section wires and similar to those of the automatic and manual turrets.

Let us observe now the fig.3, a third tool is shown according to the invention. The said tool 21 presents a part of die 22 and a part of back-die 23.

This part of die 22 has a small ladder form and presents at its extremity a cylindrical prolongation 24.

The back-die 23, which is realized so that it can conform to the die 22, presents at the extremity a concave prolongation 25 in which the cylindrical prolongation 24 of the die 22 is adapted. After positioning the orthodontic wire in the die 22, a pressure is exerted through the back die 23, obtaining some open U- ansae . Obviously, according to the position of the wire in the small ladder of the die 22 a more or less profound ansa is created. Successively, the said ansae are placed so that they have the central part on the cylindrical prolongation 24 of the die 22 and are successively closed after a pressure exerted with the concave part 25 provided on the back-die 23.

In such a way the forms Ω and the vertical ansae are obtained using only one tool. It must be however remembered that, as already said, the cylindrical prolongation 24 and the concave part 25 might be provided on a separate tool.

The present invention has been described for explanation, according to its favourite forms of realization, but it is clear that variations and/or modifications may be carried out by the experts of the branch without leaving the relative ambit of protection.

Claims

1. Kit for modelling orthodontic wires characterized by the fact that it comprises a first tool to make folds of first order and a second tool for modelling orthodontic arches, the said first tool consists of two arms, reciprocally opposite and extending in opposite directions and placed at the extremity of two supports carried in their turn by an element in the shape of pliers or by any support able to hold a wire, where said second tool provides a substantially semicylindrical structure having a flat side and a semicircular side or a piece of semicircle.

2. Kit for modelling orthodontic wires according to claim 1 , characterized by the fact that it includes a third tool for the realization of folds of second order; the said third tool provides a part of a die in the shape of small ladder, with at least two steps, and a part of back-die said parts of die and back-die are supported by elements of handle with a pliers or pressure action.

3. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the said two aπns are coupled perpendicularly to their respective supports in a fixed, semi-fixed or mobile way.

4 Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the aπns are or are not symmetric in foπn and

/or pressure.

5. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that one of the said two arms has a section in coπespondence to the coupling with the respective support, larger than that of the other arm.

6. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that on these aπns some indications are provided, preferably oblique, as reference for the execution of the folds.

7. Kit for modelling orthodontic wires according to one of the previous claims, 5 characterized by the fact that these arms are placed in an adjacent or overlapped position compared to the imaginary central line or they may be divergent one to another and may be of any geometric form plane or solid, being able to stay in any point of the support, along its height, thickness or width. o

8. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the said arms are folding on themselves telescopically, through shear and/or screwing.

9. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the said second tool provides a handle having s any form or dimension.

10. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the said handle is realized directly on one of the two elements of handle of the first tool.

11. Kit for modelling orthodontic wires according to one of the previous o claims, characterized by the fact that the said flat side has any form which fits the pliers of the Kit, square-nose pliers, and round and square-nose pliers.

12. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that the semicircular part has a 5 substantially cylindrical form.

13. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that on the said semicircular part are provided taches for the insertion of round and/or square section wires .

14. Kit for modelling orthodontic wires according to one of the previous 5 claims, characterized by the fact that the said third tool, towards the front of this part of die is provided a cylindrical prolongation, while towards the front of the part of back-die is provided a concave prolongation.

15. Kit for modelling orthodontic wires according to one of the previous claims, characterized by the fact that, the said part of die in the shape of

ID small ladder presents four or five steps.

16. Kit for modelling orthodontic wires according to any of the previous claims, substantially as illustrated and described previously.