CZ20793A3 - dental prosthesis, and process for producing and fastening thereof - Google Patents

Abstract

Construction for dental crowns, facets, inlays and the like, including mesh (3) made of stainless steel wire, shaped like to tighten the prepared remainder (1) of the tooth, while this mesh (3) is integrally attached to the crown cavity (11) body (4) to form a complete crown (5) ready for use. Complete Solid Crown (5) it can be glued to the rest (1) of the tooth in the normal way, for example, using a dental filler. Body (4) a the mesh (3) is very firmly connected to each other by mechanical means capturing due to network texture.

Description

(57) Dental crown, facet, inlay and the like structures, comprising a stainless steel wire mesh (3) shaped to tightly enclose a prepared tooth residue (1), the mesh (3) being integrally connected to the cavity (11) of the crown body (4), thereby forming a complete crown (5) ready for use. The complete solid crown (5) can be adhered to the rest (1) of the tooth in a conventional manner, for example using a dental restorative. The body (4) and the mesh (3) are very tightly joined together by mechanical engagement due to the mesh texture.

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SUMMARY OF THE INVENTION The present invention relates to dental prosthesis designs for the manufacture of a wide variety of crowns, inlays, facets and the like.

BACKGROUND OF THE INVENTION

When replacing a portion of a damaged tooth, for example using a dental crown, two methods are known. The dental crown can be made entirely of porcelain having an outer shape shaped approximately to the desired tooth shape, and an inner cavity that is fitted over the prepared tooth post abraded from the original tooth to which it is attached by cement. Alternatively, the porcelain cover is fused to a metal core that has been designed to be cemented to the prepared post. While the latter is better from a functional point of view, since it can withstand greater chewing strength, it is worse from an aesthetic point of view. However, it is still susceptible to damage, the connection between the porcelain and the metal core is a relatively weak oxide that may allow pieces of full-thickness porcelain cover to break off the metal core and release from the tooth.

SUMMARY OF THE INVENTION

In a broader sense, the invention is comprised of a denture (defined herein as a crown, inlay, facet, and the like) comprising an outer body capable of functioning as a tooth or a portion thereof and fused to or bonded to an initially pliable, textured insert that may be cemented to the rest of the tooth.

Textured means that the interface between the liner and the body has a texture that provides an effective mechanical interlock.

It is preferred that the liner be a stainless steel mesh or a mesh of other corrosion resistant drawing material. The mesh carries porcelain and at the same time secures

ΓΟ Strong mechanical interlocking of porcelain to the mesh of medium-sized oxide binding material.

In one preferred embodiment, the porcelain body is cast approximately to the desired tooth shape, and is bonded to the porcelain baked mesh. In an alternative preferred embodiment, the porcelain body is formed around the mesh by firing to approximately the desired tooth shape.

The finished denture can be attached to the prepared rest of the tooth using dental cement, filler or glue.

The denture may take various forms including a full crown, inlay or cosmetic facet, or an entirely formed tip and facet.

Further, in a broader sense, the invention is a method of manufacturing a denture consisting of shaping a corrosion-resistant textured insert into a generally cup-like shape so that it can be fitted over the outer surface of the prepared rest of the tooth.

Preferably, in one alternative, the shaping and attachment of the body takes place in one process. In a second alternative, the body is shaped into a preform before insertion of the liner and then finally fired, causing the body to attach to the liner.

The body may be of thermofusible porcelain.

The insert may be a stainless steel mesh.

In one setting procedure, the rest of the tooth is prepared and the mold is removed in rubber or the like. The mesh is then custom molded in a dental laboratory to match the mold before the mesh is inserted into the body for initial firing. The custom made crown or the like then fits particularly well on the prepared residue.

In an alternative procedure, a set of sizes of fully formed crowns or similar products is delivered to the dental office, and the appropriate size is selected to match the rest of the tooth. The mesh will be sized according to the tooth size so as to ensure adequate strength, and the rest of the tooth ^first ', the rea-IVT so ABV BVI work ien'> Nec than width. The cavities in the mesh and crowns are inserted with a good preparation, the dental padding of the rune or the like is pressed into the half-tooth and left to rest during the curing time.

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BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in more detail with reference to the accompanying drawings, in which: Figure 1 shows an exploded view of a crown assembly as a dental substitute according to the invention and the rest of the tooth; and FIG. 3 shows a schematic illustration of a fully formed tip and chamfer according to the invention.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows the prepared tooth in the patient's gum 2, in which the rest of the tooth has already been prepared by conventional dental grinding techniques to form a strong healthy post 1 to which a crown can be attached.

The porcelain crown 4 is shaped to mimic the function and appearance of a natural tooth in a healthy state. Between the uprights and the first bit 4 is inserted in frame 2 ^{of a} mesh of stainless steel, which is connected in a manner ensuring mechanical fastening, due to the network structure, the. Bit fourth internal cavity complete with built crown J5 J3 netting ground stainless steel glued to neck 1 using conventional dental cement, filler or glue.

The compliance of the stainless steel mesh 3 (or other suitable material) provides a complete crown structure 5 that is much more compliant than a crown made by conventional techniques. The crown is thus much less prone to breakage. In addition, since the texture of the mesh provides a connection to the porcelain with interlocking, it will tend to remain fixed in place in the event of damage to the porcelain instead of breaking into pieces and

-4uvoiniK. in the patient's mouth.

The relatively thin thickness of the mesh 3 and stainless steel allows for a relatively thick porcelain teiesc in the kernnee 4, thus providing very good aesthetic properties that are closer to those of natural bison than terns of traditional crowns formed on solid metal cores.

To improve aesthetic properties, the porcelain material can also be specified as an outer enamel porcelain layer, an intermediate dent porcelain layer, and an inner opaque porcelain encapsulation of the mesh p *

The complete crown 5 may be formed and fitted with any of a variety of procedures. Standard porcelain shells 4 can be made in varying sizes and shapes and kept in the dental office. The stainless steel mesh 3 is shaped to match the prepared tooth pillar 1, and a thin layer of porcelain composition is coated onto the mesh, which is then inserted into a suitable pre-fabricated crown 4 and baked. This firing and finishing process will most likely require only about one hour and can be attached to the prepared neck using dental cement. It is thus possible to fit a high-quality permanent crown during one visit to the dental office.

In another procedure, the prepared rest of the tooth is imprinted, which can be sent to the dental laboratory for custom completion and returned to the dentist for cement attachment. Meanwhile, a temporary crown is fitted to the rest of the tooth, as is normal practice. The stainless steel mesh 2 is shaped according to the dental neck in the laboratory and then has a thick porcelain composition deposited thereon which is fired in a mold to form a permanent crown.

In a particularly time-saving process, complete, fully fixed crowns 5 are formed in the dental laboratory in a number of sizes for each tooth type. The mesh for these crowns 2 will be dimensioned according to the outer size of the crown 5 so as to provide sufficient porcelain thickness for strength, but with as large an internal cavity 11 as possible to allow for an unbelievable outer layer. n; 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 9, 7 The dental restorative is inserted into the cavity 11 and the rune 5 is fitted onto the rest 1 of the tooth.

The filler mass is plastic or pasty and fills all the space between the mesh 3 and the rest 1 of the tooth. The filler material cures, normally in about 5 minutes, and the work is done.

This allows the patient to choose whether to thread a custom-made crown in order to obtain the best duplicate of the true shape of the natural tooth to be managed or a cheaper but also solid alternative. In all cases, the crown can be of higher mechanical quality than previously known crowns.

Fig. 2 shows an application of the invention in which inlej is applied to a damaged part of a tooth where the damage is not so wide as to require a complete crown. The damaged tooth section is abraded by traditional methods. After the residue of a natural tooth prepared in this way, net 2 ^two stainless steel shaped to fit the prepared surface which is to be inserted. The porcelain mixture 3 is then applied to the screen 3 and baked in a suitable form, or the preformed porcelain inlay can be baked on the screen by first applying a thin layer of the porcelain mixture to the screen.

Once the inlay mesh and porcelain composite is complete, it can be glued to the prepared tooth using dental cement.

Such an inlej creates a repair of very high aesthetic quality and ensures very good functional strength and durability.

Giant. 3 shows a tooth her having suffered a fracture of the toe and which has been repaired using the combined facet and toe according to the invention. The natural tooth 81 is again ground to the desired shape and the metal mesh 3 is shaped over the front surface of the tooth and the bite tip. The porcelain facet and the spike are then formed or attached in one piece to the mesh, which is then co -entent to the damaged tooth and a tooth having sufficient strength in contact with the

8. This correction results in the normal chewing of the opposite tooth 10.

Claims (14)

A dental substitute comprising an outer body capable of functioning as a tooth or a portion thereof, fused or attached to an initially pliable, textured insert that can be attached to the remainder of the tooth by a cemeter. Dental restoration according to claim 1, characterized in that the insert consists of a mesh structure. 3. The dental prosthesis of claim 2, wherein the mesh is formed from a woven yarn. 4. The dental prosthesis of claim 3 wherein the fiber is a corrosion resistant metal or wire. Dental restoration according to claim 4, characterized in that the metal mesh is fused directly to the body. Dental restoration according to claim 5, characterized in that it is in the form of a crown, inlay or facet. * 7. A method of making a dental substitute in which a textured, flexible corrosion resistant insert is formed into a generally cup-shaped shape so that it can be fitted over the outer surface of the prepared rest of the tooth, forming a dental outer body and attaching the body to the insert. * The method of claim 7, wherein the insert is a mesh formed of a woven tensile fibrous material. The method of claim 8, wherein the body is of porcelain and is formed by molding and firing, wherein the mesh is inserted into the mold body before a single final firing process. The method of claim 8, wherein the mesh is coated with a porcelain paint and inserted into the body after an initial partial firing process of the body, wherein the body and mesh combination is then further baked to complete the firing process and attach the mesh to the body. 11. A method of manufacturing and setting a dentures, comprising forming a plurality of dentures, each with an outer body and an inner mesh connected integrally to the body, in a plurality of body sizes to provide dental restorations for the dental restorations. 2vt.i1 r- ra heat. in her. dental restorations suitable in shape, prepare the rest of the tooth so that arv matched dental restorations. and the selected dental restorations are attached to the rest using the dental restorative material of said size and the selected adhesive or the like. 12. A method of manufacturing and setting a dentures, comprising preparing a rest of the tooth and removing the rest of the tooth to form a duplicate of its size and shape, forming an insert from a metal mesh to closely fit the mold, forming a tooth body around the mesh and the body and the mesh are rigidly joined together into an integral denture, and the denture is fitted and adhered to said remainder with a dental restorative or the like. A method according to claim 7, characterized in that the body is deposited in an uncured or unburned form on a liner and is shaped to the desired shape of the tooth or part of the tooth before it is hardened or fired. A dental prosthesis stock comprising a group of dental prostheses each according to claim 1, wherein the dental prostheses are a variety of sizes, shapes and colors.