JPS5834133B2 - Articulator for manufacturing dentures and their parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an articulator for use in the production of dentures or parts thereof, comprising two articulators provided with fixing means for carrying models of the upper and lower rows of teeth. It is separated from the main members, one of which is pivotable relative to the other by means of two condylar mechanisms that simulate the movements of jaw symphysis.

Due to the fact that such an articulator makes it possible to fix models of the patient's upper and lower tooth sets to simulate the patient's chewing and back movements;
The teeth in the finished denture or denture part can interact satisfactorily.

Since the adjustment and handling of the model in the articulator requires the utmost care and precision, it is important that the model is as accessible as possible when installed in the articulator.

In known types of articulators in which the condylar track of the condylar mechanism is attached to the upper ends of two upright columns projecting from the main member forming the base or frame of the articulator, it is difficult to approach the model easily. Although they are more or less acceptable in this respect, they are of the so-called arch-one type, and their condylar orbit is the upper member and is carried by the base or frame of the articulator. In known articulators, such as those mounted on the main part, proximity and visibility are very limited within certain critical angles.

In such articulators, the balls and shafts within the condylar mechanism are supported by slightly lateral columns extending upward from the base, allowing access from several directions to the interior of the articulator where the work piece is placed. There is much less to do.

It is therefore an object of the present invention to propose a new and improved articulator of the type mentioned in the discussion, in which the adjustability is increased and the proximity is improved from all measurements in practice. The purpose is to propose a highly improved articulator that allows access to the inside of the articulator.

This purpose originally meant that one main member of the articulator made according to the invention was responsible for the other, and for that purpose the first mentioned member was a single elongated arm or column. , which has at its end facing the second main part a condylar ball displaceable on a condylar shaft, which is included in a condylar mechanism, which is known per se. The second member carries the condylar track while the second member carries the condylar track.

In addition to the increased proximity and improved adjustability, in particular the possibility of greater so-called Bennett sieves, i.e. the possibility of setting the condylar trajectory obliquely with respect to the condylar shaft. , this embodiment according to the invention proposes a simplified and therefore cheaper articulator construction.

An embodiment of an articulator made in accordance with the present invention which has been found to practically meet the requirements for an articulator such as being simple, stable and easy to operate is one having a simple elongated column. The main part carried by the first part forms the articulator base or stand, while the main part carried by the second part forms the upper part of the articulator, which with the aid of a condylar mechanism It is pivotable relative to the base or stand.

The single elongated arm or post can be arranged in a variety of ways to support the condylar shaft.

In one embodiment of the articulator according to the invention, its end towards the supported main member can have two collinear, but oppositely oriented holes;
Ru.

Condylar shafts are positioned through these holes to extend from the column in either direction.

The condylar shafts may be screwed or perhaps inserted and constrained into these holes.

In an alternative embodiment, allowing so-called full adjustability of the condylar mechanism, the condylar shaft is instead arranged to extend in either direction from the elongated column; The column has for this purpose, at the end of the column facing the main supported member, a hole which opens on both sides of the column.

In this embodiment, the condylar shafts within the bore are displaceable individually and in conjunction, and the inner parts of the bore are threaded with respect to each other so that they can be restrained within the bore. .

This gives the shaft a very wide range of simple adjustability, so that the shaft can be moved individually in one direction or the other, or in opposite directions, the housing or all together, as required.

In order for the articulator according to the invention to have a so-called fully adjustable condylar mechanism, the condylar track must not only be pivotable around two mutually perpendicular axes but also constrainable. and the hole for the same is displaceable on the supported main member, transversely relative to said member, and is capable of being restrained relative to said member, so as to be adjustable also for the spacing between them. It must be arranged as follows.

In the following, the invention will be explained in more detail with reference to two embodiments of articulators made according to the invention, which are shown in the accompanying figures.

As can be seen from the figures, the articulator according to the invention consists of two main parts 1 and 2.

In both of the embodiments shown here, one of the parts 1 forms the upper part of the articulator, while the other 2 forms its base or frame.

The upper member 1 has a T-shape when viewed from above, but the bottom 2
The one is shaped like a triangular or Y-shaped plate.

The lower plate or bottom 2 and the upper member 1 have fastening means in the form of known screws 3 centrally on their mutually opposite sides and a model of a set of upper and lower teeth of the patient (not shown). A guide pin is provided to stop the

The bottom of the board 2 has screws screwed into the bottom at each corner,
There is a leg 5 with a knurled part 6 so that it can serve as a leveling means by being screwed in and out of the bottom.

On the top side of the substrate there are also setting means 7 which cooperate with measuring pins 8 extending downwardly from the free end of the upper member.

This pin, together with the setting means 7, does not require any further explanation here, since both are known and are described, for example, in US Pat. No. 2,603,869.

The upper member 1 has a rod 9 extending upwardly on its upper side, so that when the upper member is completely swung back, i.e., at swing back 1800, the free end of the rod 9 is positioned so that the articulator is placed on top of it. It will hit the surface of the table it is placed on and come to rest.

More specifically, the articulator shown here according to the invention has an upper member 1 of which has two condylar mechanisms 10 with a ball and socket joint, simulating articulatory movements of the patient's jaw. With the aid of the fact that it is pivotable relative to the lower part or base 2, it can be folded or swung out.

These are of known types and are commercially available from Dentatus Co., Ltd. of Hegelsten, Sweden.
There is no need to elaborate further here.

According to the invention, one of the two main members in the articulator made according to the invention is to support the other;
It has a single elongated arm or column for this purpose.

In both of the articulators according to the invention shown here, it is the lower member or base plate 2 that supports the upper member 1, and for this purpose the base plate 2 is provided with vertical narrow arms or columns 11. It carries at its end towards the upper part a condylar shaft 12, which is included in a known condylar mechanism, and a displaceable condylar pole 13 on said shaft.

The upper member 1 in both embodiments carries the condylar track 14 of these mechanisms.

The track 14 is adjustable and restraint mounted in an annular retainer 15, which in turn has set screws 16 at both ends of the laterally flared portion 17 of the T-shaped upper member 1. Fixed by

In both of the embodiments shown here as articulators according to the invention, the single slender arm or post 11 is shaped like a double-turned candle holder with a long slender center. .

In this way, the model of the dentition carried on the articulator can be approached even from the direction shown in FIG.

At the top towards the upper part 1, this arm or column 11 is provided with a section 18 which extends in both directions.

In the interior of these parts, in the embodiments shown in FIGS. 1 and 2, there are two holes 19 that are colinear but point in opposite directions; 1
2 are arranged and extend in either direction from the arm or column 11.

The inner end of the condylar shaft is threaded to engage corresponding threads inside the two holes, and at the same time is fitted with a captive screw 20 to restrain the shaft therein.
is attached.

Thus, for example, as seen in FIG. 2, by moving and fixing the two shafts 12 by equal amounts to the right, the upper part 1 of the articulator is adjusted to the right.

Of course, the upper member 1 could also be adjusted to the left in the same way.

Furthermore, by widening the distance between the two shirts 1120, the play of the upper member 1 on the shaft 12 is eliminated.

In the embodiment shown in FIG. 3, two condylar shafts 12
There is a common hole 21 for the column 11 which is open on both ends of the column 11 and extends through two parts 18 which project on either side of the end of the column towards the upper part 1.

The condylar shafts, etc. within this bore can be displaced and constrained within the bore, both individually and together.

For the restraint, in this embodiment as well, a restraining screw 2 is used.
0 is attached.

If it is desired to move one of the condylar shafts with the condylar ball associated with it, first loosen the associated restraint screw 20, then the shaft can be twisted out into the desired position and the restraint or stop screw Tighten again.

The same process is applied to the condylar shaft on the opposite side.

If it is desired to move the two centrally connected condylar shafts to different positions relative to the holder, this may be done by loosening both captive screws 20 and moving the two condylar shafts in one unit. so that it can move from one side to the other.

In the embodiment shown in FIG. 3, a condylar shaft is provided which can cooperate with the two displaceable condylar shafts 12 and which provides full adjustability for the condylar mechanism in the so-called Pennett plane. The shaped tracks 14 are both pivotable and restrainable about two vertical axes, and holders for them are arranged on the upper member 1 so as to be transversely displaceable thereto. Behind the scenes, the distance between them can also be adjusted.

More particularly, this displaceability is achieved in that the slot 24 is arranged in a laterally extending section of this element.

The retainer 15 has its setting screws 1 inserted into these slots.
It can be constrained by 6.

The invention is not limited to the two embodiments described herein and shown in the figures.

Rather, it may be modified in many ways within the scope of the claims.

The same buttons in the drawings indicate the same members, 1 is the upper member,
2 is a base plate, 11 is a column, 10 is a condylar mechanism, 12 is a condylar shaft, 13 is a condylar pole, 14 is a condylar orbit, 15 is a retainer, and 24 is a slit.

[Brief explanation of the drawing]

FIG. 1 shows the first embodiment with parts cut away.
A side view is shown. FIG. 2 is a partially cutaway rear view of this articulator, seen from the left in FIG. 1. FIG. 3 is a partially cutaway rear view corresponding to FIG. 2 of the second articulator.

Claims (1)

[Claims] 1. It comprises two main parts I, 2 with fixing devices 3 for carrying the model of the upper and lower dentition, one of said parts 1 with respect to the other 2. An articulator for use in the manufacture of dentures or parts thereof, which is pivotable by two condylar mechanisms simulating the movements of the joints of the jaws, in which one main member 2 is connected to the other 1. and for that purpose the first mentioned member 2 has a single elongated arm or column 11 which at its end facing the second main member 1 is connected to a condylar mechanism 10. characterized in that the second member 1 carries a condylar shaft 12 on which the condylar mechanism is displaceable, while the second member 1 carries a condylar track 14; Articulator for use in making dentures or parts thereof. 2 The main part 2 with a single elongated arm or column 11 forms the base or stand of the articulator, while the main part 1 carried by said part 2 forms the upper part of the articulator. An articulator according to claim 1. 3. A single elongated arm or post 11 has at its end towards the supported main member 1 two collinear but oppositely oriented holes 19 into which the condyle can be inserted. 3. The articulator according to claim 1, wherein the shaped shaft 12 is arranged extending in either direction from the arm or the column. 4. The single elongated arm or column 11 has at its end facing the supported main member IK a hole 21 open on both sides of the column, into which the condylar shaft is inserted. 3. The articulator according to claim 1 or 2, wherein the articulator 12 extends from the arm or the column in both directions. 5. The condylar shafts 12 in the bore 21 are displaceable and restrainable both individually and together within the bore, and the parts 22, 23 of said shafts located in the bore are threaded into each other. The articulator according to claim 4.