Direct method of manufacturing a wire-composite crowns

 

(57) Abstract:

The invention relates to medicine, namely to the dentist, and can be used in the manufacture of wire-composite crowns defects of the tooth crown. The technical result of the invention consists in the restoration of the direct method, anatomical form, function and appearance of damaged teeth in one visit to the doctor, and also the low cost and durability of the structure. The way to restore the crown of the tooth by preparation of the stump of the tooth, making and fixing with cement crowns, including as a pre-fabricated reinforcing frame mesh Cup-shaped form with the inner surface, congruent outer surface of the stump of the tooth and the surrounding reinforcing material. The tooth preparation begins with the chewing surface, then zashlifovyvajut consistently contact, vestibular and oral surfaces to the level of the gums, creating at her level ledge, with tissue zashlifovyvajut thickness 0,9-1,2 mm and prepare the tooth stump conical shape, which is set for fitting a reinforcing frame made of mesh with a thickness of 0.4 mm, then the grid Karka is Ziva and polimerizuet standard method, put the second layer of adhesive and treated in a similar way, then isolate the tooth stump foil, a pin is stuck in her wire frame, put on it a composite material according to the technology specified in the instructions to material after fabrication of the grid-composite crowns her shoot from the stump of the tooth and remove the foil, do the final sanding and polishing. 3 C.p. f-crystals.

The invention relates to medicine, namely to the dentist, and can be used in the manufacture of wire-composite crowns defects of the tooth crown.

The causes of the defeat of hard tooth tissues include: dental caries and its complications, pathological abrasion of hard tooth tissues, acute and chronic injuries. When the defects of the tooth crown is used mainly dentures tab and artificial crowns (Tregubov Century. N. and other Prosthetic dentistry. S.-Petersburg, FOLIO, 2002, pages 152-154). Crowns are more traditional and accessible, efficient and effective method of repair of defects of dentition, compared with tabs. In clinical practice dentistry to remedy the defect of the tooth crown used the following types of crowns: metal price quotes.

Despite the wide range of artificial crowns, restoration of defects of coronal tooth structure remains one of the urgent problems of modern dentistry.

The prior art method of recovering the crown of the tooth by making metal-ceramic crowns, including as a reinforcing element cast metal mesh (U.S. patent No. 4846718, MCI And 61 With 13/225, publ. 11.07.89).

The main disadvantages of this method are:

1. For the manufacture of a metal frame required precision casting.

2. The method requires laboratory stages.

3. The possibility of difficulties in fitting of cast metal frame.

4. Possible chipped ceramic tiles.

5. Poor control over the formation of defects of hard tissues under the denture.

6. Difficult correction and repair of the structure.

7. Ceramic tiles leads to unwanted abrasion of natural teeth-antagonists.

The closest in technical essence is taken as the prototype of a way to restore the crown of the tooth by preparation of hard tissue and the formation of a stump made of reinforcing metal mesh Cup-shaped form with the inner surface, congruent outer surface of the stump of the tooth and the surrounding reinforcing material (RF patent No. 2086205, MCI And 61 With 5/09, 13/09, publ. 10.08.97, bull. No. 22).

The disadvantages of this method are:

1. The need to prepare a large number of hard tooth tissues.

2. Complex, multi-step fabrication process.

3. Requires an additional operation firing for education vzaimoponimajus4ej clutch grid with porcelain.

4. Increased abrasion antagonists due to the greater hardness of ceramics, in comparison with enamel.

5. Frequent chipped ceramic facing difficult correction and repair of the structure.

6. If necessary endodontic treatment is necessary to remove the crown.

The problem to which the invention is directed, is the restoration of the defect of a coronal part of a tooth using a gentle method of preparation of tooth tissues and reducing the time to manufacture crowns.

The technical result of the invention consists in the restoration of the direct method, anatomical form, function and appearance of damaged teeth in one visit to the dentist, and t is:

1. The tooth preparation is a gentle method of preparation of hard tissue of teeth.

2. Grid frame, connecting with a composite material forms a single piece, providing structural strength.

3. If necessary endodontic intervention, it is possible to create access through the perforation, without removing the structure.

4. Grid-based composite crown is made direct way in one visit, in the chair, which is a positive effect on the mental condition of the patient.

5. Low cost, ease and durability.

The technical result is achieved due to the fact that the way to restore the crown of the tooth is carried out by preparation of hard tooth tissues, fabrication and fixing of the crown with cement, including as a pre-fabricated reinforcing frame mesh Cup-shaped form with the inner surface, congruent outer surface of the stump of the tooth and the surrounding reinforcing material, while the tooth preparation begins with the chewing surface, then zashlifovyvajut consistently contact, vestibular and oral poverkhnostplus tooth conical shape, which is set for fitting a reinforcing frame made of mesh with a thickness of 0.4 mm, then the grid frame off stump, covers the first adhesive layer, purge air for uniform distribution of the adhesive and polimerizuet standard method, put the second layer of adhesive and treated in a similar way, then isolate the tooth stump foil, a pin is stuck in her wire frame, put on it a composite material according to the technology specified in the instructions to material after fabrication of the grid-composite crowns her shoot from the stump of the tooth and remove the foil, do the final grinding and polishing of the crown. The technical result is also achieved due to the fact that pre-reinforcing frame made of a mesh size of 22 cm square, cut its corners and edges, forming a circle, which by means of stopper give a bowl shape, and to improve the fixation of crowns on the surface of the stump shape retention points in the form of a horizontal groove depth of 0.2-0.3 mm Mesh may be made of metal or synthetic material.

Direct method of manufacturing a wire-composite crowns as follows.

Radelet suitable color crowns according to the standard scale VITA, then put a portion of the composite on the tooth surface for clarification and comparison of the selected color from the original. Next, the application of local anesthesia to prevent possible pain. Carry out the grinding of hard tooth tissues tools with diamond coating in combination with water cooling. Start with the preparation of a chewing surface, using special barrel or colesville diamond head. Tops chewing cusps of the curve. Crowns of incisors shorten 1/4 of their height. Further separation disc or conical Burr zashlifovyvajut contact (approximal) the surface of the gums. Dissection of the vestibular and oral surfaces produce similar contact, creating at the gum ledge. The thickness of the grinding tissue is 0.9 to 1.2 mm In the preparation of the tooth stump acquires a conical shape with a small angle (3) the vanishing of the contact surfaces of the tooth. To improve the fixation of crowns on the surface of the stump of the tooth shape retention points in a horizontal grooves, a depth of about 0.2 to 0.3 mm

For the manufacture of a reinforcing frame using a grid of metal, for example gold-plated stainless steel, the edges of which are cut with scissors and achieve the shape of a circle. Next, using stopper circle give a bowl shape and try on the tooth stump. Then Cremonini and beaked forceps form a mesh-reinforcing frame so that it matches the contours of the stump of the tooth. Try on grid-reinforcing frame on the tooth stump, after trying on the shoot from the stump and covered with adhesive, lightly blow air for even distribution and polimerizuet standard method. Then put the second layer of adhesive and repeat manipulation.

Conduct insulation stump of the tooth from the grid-reinforced frame with foil. After wire-reinforcing frame pin is stuck on the tooth stump and begin the manufacture of crowns with composite materials.

Put on wire-reinforcing frame composite material according to the technology specified in the instructions to the material. After making her shoot from the stump of the tooth, remove the insulating foil grid-composite crowns and start grinding and polishing, fixed grid-based composite crown on the cult of the tooth with cement.

Thus, this method allows you to restore anatomical form and appearance of damaged coronal part of the tooth">

Complaint: on the aesthetic dissatisfaction with 25 tooth.

History: Previously 2.5 tooth was cured about complicated caries. Two years ago 2.5 tooth was covered with stamped crown. Two weeks ago was rastamaniak crowns.

Objectively: the crown part 2.5 of the tooth is destroyed by 1/2. Comparative percussion painless. On the radiograph: root canals obturated to tops, changes in periapical tissues were not detected.

Diagnosis: chronic fibrotic periodontitis.

Treatment: removal of dental plaque and color definition.

Under local anesthesia carry out the grinding of hard tissues of 2.5 tools with diamond coating in combination with water cooling. Start with the preparation of a chewing surface, using special barrel or colesville diamond head. Tops chewing cusps of the curve. Next separationism disk or conical Burr zashlifovyvajut contact (approximal) the surface of the gums. Dissection of the vestibular and oral surfaces produce similar contact, creating at the gum ledge. The thickness of the grinding tissue is 0.9 to 1.2 mm In preparirovania improve the fixation of crowns on the surface of the stump of the tooth shape retention points in a horizontal furrows, depth of about 0,2-0,3 mm

For the manufacture of a reinforcing frame using a metal grid with small cells with a thickness of 0.4 mm From the grid cut out a square of 22 cm, corners and edges, which are cut with scissors and achieve the shape of a circle. Next, using stopper circle give a bowl shape and try on the tooth stump. Then Cremonini and beaked forceps form a mesh-reinforcing frame so that it matches the contours of the stump of the tooth. Try on grid-reinforcing frame on the tooth stump, after trying on the shoot from the stump and covered with adhesive, lightly blow air for even distribution and polimerizuet standard method. Then put the second layer of adhesive and repeat manipulation.

Conduct insulation stump of the tooth from the grid-reinforced frame with foil. After wire-reinforcing frame pin is stuck on the tooth stump and begin the manufacture of crowns with composite materials company 3 M

Put on wire-reinforcing frame composite material according to the technology specified in the instructions to the material. After making her shoot from the stump of the tooth, remove the insulating foil grid-composite cor is.

Complications after carrying out the above method have been identified.

1. The way to restore the crown of the tooth by preparation of hard tooth tissues, fabrication and fixing with cement crowns, including as a pre-fabricated reinforcing frame mesh Cup-shaped form with the inner surface, congruent outer surface of the stump of the tooth and the surrounding reinforcing material, characterized in that the dissection begins with the chewing surface, then zashlifovyvajut consistently contact, vestibular and oral surfaces to the level of the gums, creating at her level ledge, with tissue zashlifovyvajut thickness 0,9-1,2 mm and prepare the tooth stump conical shape, which is set for fitting a reinforcing frame made of mesh with a thickness of 0.4 mm, then the frame is removed from the stump, covers the first adhesive layer, purge air for uniform distribution of the adhesive and polimerizuet standard method, put the second layer of adhesive and treated in a similar way, then isolate the tooth stump foil, a pin is stuck in her mesh-reinforcing cage, put him in composite material technology, pointed to by the Ute foil, do the final grinding and polishing crowns.

2. The method according to p. 1, wherein the pre-reinforcing frame made of a mesh size of 2 square cm, cut its corners and edges, forming a circle, which by means of stopper give a bowl shape.

3. The method according to PP.1 and 2, characterized in that to improve the fixation of crowns on the surface of the stump shape retention points in the form of a horizontal groove depth of 0.2-0.3 mm

4. The method according to any of the preceding items, wherein the mesh is made of metal or synthetic material.

 

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FIELD: medical engineering.

SUBSTANCE: method involves producing an opening of diameter reaching 2 mm with diamond or hard alloy bore in adhesive cover after preparing abutment tooth and prosthesis or widening already available perforation also to diameter of 2 mm. The prosthesis is set on the abutment tooth and place is marked for creating and directing pin-canal in the area of cutting one-third of the frontal abutment tooth or in the lateral abutment tooth equator area. The pin-canal direction is to correspond to path for introducing the prosthesis. The pin is screwed-in with screwdriver and holder to a depth of about 2 mm into dentin. The prosthesis is set on the abutment for making control. The pin is filed-off to adhesive cover layer after having fixed the prosthesis on composition cement.

EFFECT: prolonged service life; high functional value.

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