DE7330658U - Impression accessory for the manufacture of root caps - Google Patents

Description

• 9

Bad Homburg v.d.H », August 21, 1973

Pr / sp

Kulzer & Co. GmbH, Bad Homburg v.d.H.

Utility model registration

"Impression part for the production of root caps"

The innovation relates to an auxiliary impression part for the production of custom-fit root caps for artificial teeth.

The cast parts made of a root cap and a root post necessary for the construction of post teeth or other prosthetic restorations have so far been made using molds made of wax or plastic, which are burned out after embedding in suitable masses be poured.

The wax molds, which are either placed directly in the patient's mouth or indirectly using a root stump model require careful, careful handling in further operation because of their poor stability process and embed.

For the plastic molds that were previously only manufactured in an indirect process For example, if the plastic is used as a film, it is made of

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the shape by pulling or pressing over a die model will be produced. This method is not very suitable for small parts, e.g. root caps. The production of the plastic molds, which can only be obtained in the indirect process, is technical, and quite elaborate.

The innovation is based on the task of producing of manageable cast models, both in the direct and in the indirect method, enabling impression support to create that will also be the basis for the casting model with which individually adapted root caps can be produced in one-piece casting on simple catfish.

This object is achieved by an auxiliary molding part, which is characterized by a cap-like body with a circumferential, protruding edge and a bottom adjoining the edge, which is designed like a channel. A V-shaped design of the has proven to be particularly advantageous Proven soil.

This auxiliary impression part is preferably made of dimensionally stable plastic that burns without leaving any residue. In practical use, it has proven to be particularly advantageous if the impression aid is made of a translucent or transparent plastic, e.g. clear polymethyl methacrylate.

The cap-like bodies consist of a cast-on precious metal alloy, the essential components of which are platinum and contains gold, this has the advantage that the impression accessory

* for example - 3 -

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is used at the same time as the basis for the Gyssmoaeli and in one-piece casting by casting alloys one of the The impression is given an appropriate individual completion.

The auxiliary molding part can advantageously have a continuous bore opening into the floor channel. This prefabricated hole on the one hand facilitates the handling of the impression aid steeply when taking the impression, on the other hand a pin can be inserted through it are pushed through, the part of which protruding beyond the cap base in cross section essentially corresponds to that of the root canal is equivalent to.

The pin is preferably made of the same plastic material like the remedy part *

The edge of the cap-like body is conical, whereby the gum groove opens when it is placed on the stump of the tooth, and thus the following individual molding of the gingival furrow is facilitated.

This conical edge design, which the finished casting also has, when using anchoring elements prevents the gums from growing in between the prosthesis and the surface of the root cap with an attachment-like effect.

The auxiliary impression part is expediently available in several sizes available, so that a selection with regard to the shape of the tooth stump to be molded is possible.

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of the innovation.
Show it:

1 shows a vertical section through an auxiliary impression part,

2 shows a vertical section through a further embodiment of the auxiliary molding part,

3 shows a vertical section through an auxiliary impression part with a pin.

In the figures, the reference number 1 is the cap-like Abf ormhilf marked steeply. It has a V-shape Bottom 2, to which a conically shaped, projecting edge 3 is connected.

In the embodiment according to FIG. 2, the base is provided with a bore 4 Mistake. As shown in FIG. 3, a pin 5 can be inserted through this bore 4.

In order to explain the work with the new auxiliary impression part, the production of a casting model for the production eiu; s Described metal casting from cap and pen for a pen crown.

After the root surface and the root canal have been prepared, a selected root post 5 is made of transparent, residue-free burning polymethyl methacrylate introduced into the root canal, adjusted and lifted out of the root canal. D & .'s cap-like impression aid part 1 made of transparent, residue-free

Burning polymethyl methacrylate is placed on the root surface, with the circumferential edge 3 in the gum groove is pushed, and drilled at the point where the root entrance can be seen.

The adapted root post is inserted into the root canal through the bore of the pushed-on impression part so that it protrudes beyond the base 2 of the auxiliary impression part. The pin forceps are pressed down to the root cap, the root pin and The auxiliary impression parts are removed and remain in the tweezers fixed.

One made from a mixture of methyl methacrylate, polymethyl methacrylate and polymerisation catalyst existing thin-bodied dough is poured into the channel-shaped, with the surrounding Edge 3 provided bottom 2 of the impression auxiliary part dripped. When the plastic dough has reached a plastic consistency, in this way, the two parts that are fixed to one another, the root post and the auxiliary impression part, are inserted or opened in the root canal the root stump pushed up. The tweezers are used to fix the individual impression under slight pressure until the plastic dough has hardened. The hardening time is about three minutes.

Root post and auxiliary impression part, thanks to the hardened plastic firmly connected to each other, are lifted off; they form the finished casting model for the metal casting, which is then based on the usual Way done.

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With the aid of the impression auxiliary part according to the invention, such a Time-saving production of the cast parts of a root post cap as the basis for a post crown is possible.

From this example it is readily apparent to a person skilled in the art that and in what way the new auxiliary arm part is also used in the indirect production of the casting mold
and what possibilities exist in the use of other materials both for the auxiliary impression part and instead of the plastic root post and the plastic dough. For example, the root post can also be made of a precious metal alloy that can be cast on.

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Claims (1)

Protection claims Auxiliary impression part for the production of a custom-fit root cap for artificial teeth, marked by a cap-like body (1) with a circumferential, projecting edge (3) and a bottom (2) adjoining the edge, which is designed like a channel. Impression aid according to claim 1, characterized in that that the cap-like body (1) consists of transparent or translucent plastic. Impression aid according to claim 1, characterized in that that the cap-like body (1) is made of a cast-on precious metal alloy, which are essential components Contains platinum and gold. Impression aid part according to one or more of the preceding Claims, characterized in that the cap-like body (1) has a continuous one opening into the floor channel Has bore (4). Auxiliary impression part according to claim 4, characterized in that the edge of the cap-like through the bore (4) Body protruding pin (5) made of plastic or ant edible noble metal alloy is pushed through. An auxiliary molding part according to claim 5, characterized in that the pin (5) consists of the same plastic like the cap-like body (1). 733065829.11.73 7. Impression aid part according to one or more of the preceding Claims, characterized in that the base (2) is V-shaped. 8. auxiliary molding part according to one or more of the preceding claims, characterized in that the edge (3) is conical is trained. 733065829.11.73