Method for manufacturing dental bridge carcass from fibrous materials

FIELD: medicine.

SUBSTANCE: method involves preparing teeth for making crown, taking imprint, producing collapsible model, forming fibrous carcass and subjecting it to polymerization. Teeth preparation is carried out with 0.8-1.3 mm wide supragingival circular shelf and with 1.5-2.0 mm wide on occlusion surface. The collapsible model is covered with rubber-like lacquer and dried at room temperature. Thin creamer layer is applied on dental stumps. Prosthesis carcass formed preliminarily measuring required fibrous ribbon length, impregnating it with liquid composite, cutting 6 or 8 equal strips and superimposing them one over the other to produce multi-layer ribbon, stretching it all its length along and determining its middle. Then, the finished ribbon is fixed on stump 1 as throw-on loop. Ribbon ends are connected and twisted in spiral with maximum tension on connection beam side to the next stump 2, that is wrapped with ribbon ends remaining free and fixed on stump 2 prepared for setting crown with end overlap of 2-3 mm or fixed on stump 2 prepared as inlay. Then, The carcass is layer-by-layer covered with creamer: pericervical layer, dentine and enamel. After having been polymerized, the ready prosthesis is polished.

EFFECT: producing large dental bridges without using metal; improved functional properties.

2 cl, 5 dwg

 

The invention relates to medicine and can be used for the manufacture of dentures, made of fibrous materials.

A known method of manufacturing a reinforced grid-adhesive bridges (RF patent No. 2226995, CL AS 13/00, 2003 - equivalent), including preparation, forming a horizontal support for the reinforcing element, forming a flexible support beams.

The disadvantages of this method are that the design is less resistant to vestibuloocular direction that affects the structural strength, as well as the use of reinforcing mesh-adhesive dental bridge does not allow the prosthesis with low clinical crowns.

Also there is a method of forming periodontal bus (patent RF №2163104, CL AS 8/02, 13/00, 2001 - equivalent), which includes the use of six-plane of the tape from microtechnology, forming the frame of a single layer of tape and fixing it on two adjacent teeth on a variety of surfaces.

The disadvantage of this method is the impossibility of making the bridge a large extent, and the use of this method for splinting allows you to restore the dentition defect is not more than one tooth in the front group, the thickness of the thinner frame, which weakens the design of the prosthesis.

To fibrous mater who Alam, used to obtain the skeleton include:

1) polyethylene fibers;

2) ceramic fiber;

3) glass fibers;

4) aramid fiber.

For framework fabrication of prostheses used the following types of fibers:

1. Polyethylene fiber CONNET (KERR) and RIBBOND (RIBBOND-INK), these materials have gained widespread popularity among dentists. Polyethylene fibers impregnated composite has a tensile strength of ˜200 MPa. CONNET (KERR) have similar equipment, strength ˜300 MPa.

2. Ceramic fiber, such as American material GLASS-PAN has a strength ˜500 MPa. This chemically treated flexible ceramics, completely plastic, colorless, forms a physical and chemical bond with the composite does not shrink.

3. Glass fiber FIBRECOR, FIBERSPLINT (POLYDENTA) and VECTRIS (IVOKLAR VIVADENT). Glass fiber brand FIBERSPLINT (POLYDENTA) represent microfiber quartz. Fiber is gaining strength due to impregnation with resin or flowable composites. Their strength up to 1000 MPa.

4. Aramid fiber RAS, terlon.

The closest in technical essence is a method of manufacturing a fixed bridge prosthesis (RF patent No. 2177276, CL AS 13/00, 2000 - prototype), including the preparation, fabrication of the plaster model, the formation of the skeleton of the dental prosthesis with the connecting beam in the ex is e between the abutments, the lining frame, heat treated.

The disadvantages of this method are the inability of the prosthesis with low clinical crowns, the need for retraction filament, injury circular ligament of the tooth preparation, the duration of manufacture (several clinical and laboratory stages), retraction of the gingival margin potential exposure of the metal frame. The presence of a metal frame leads to the release of metal ions and the creation of electrochemical vapor in the oral cavity.

Thus, identified as a result of a patent search methods of manufacturing the frame bridges on the basis of different materials do not achieve the technical result consists in creating a framework for bridges longer stretches without the use of metal, as well as to improve the functional properties of the construction.

The invention consists in that in the method of manufacturing the frame of the bridge of fibrous materials, including dissection of the tooth under the crown, removing the cast, the production of the folding model, the formation of the fibrous skeleton and its polymerization, and dissection of the tooth under the crown comply with circular naddesnevyh the ledge width of 0.8-1.3 mm, and on the occlusal surface of 1.5-2.0 mm, rathborn the Yu model is applied rubbery lacquer with subsequent drying at room temperature, on the stump teeth apply a thin layer of karemera, and the formation of the fibrous skeleton of the bridge is carried out using multi-layer fiber tape impregnated with liquid composite, which is in the form of a coupling loop is fixed on the cult of 1, then the ends of the tape are combined and twisted in a spiral with the maximum tension at the contact surface, i.e. on the side of the connecting beams to the next stump 2, which wrapped the remaining ends of the tape and then secured them to the cult of 2 overlapping ends of 2-3 mm or fixing the residual limb 2, treated as a tab, then the frame is covered with layers karemera - cervical layer, dentin and enamel, and after curing, the finished prosthesis is polished, and the polymerization of the frame is carried out in a furnace with UV radiation, the wavelength of which is equal to between 450 and 550 nm, and the thickness of the fibrous tape consists of 6 or 8 layers, depending on the diameter of the stump.

The invention is illustrated by drawings:

figure 1 - the initial formation of the framework:

1, 2 - core, 3, 4 - all soaked in liquid composite fiber tape;

figure 2 - formation of the frame on the cult 1 by coupling loops;

figure 3 - the formation of the frame between the stubs 1 and 2;

figure 4 - formation of a skeleton on the cult of 2 by wrapping the stump remaining ends of the tape and fix the corruption of their overlap;

5 is a fixation of the ends of the tape in the tooth 2, processed under occlusive cover.

The method of manufacturing the frame of the bridge is as follows.

Mechanically clean the surface of the teeth adjacent to the defect, and determine a suitable color according to the standard scale VITA. Then carry out the dissection of the tooth under the crown with a circular naddesnevyh the ledge width of 0.8-1.3 mm, and occlusional surface of 1.5-2.0 mm, make a mold using silicone impression material is made collapsible model, on which is applied a layer of rubber-like varnish (ser ceramage), the lacquer is dried at room temperature for 10 minutes, on the stump and put a thin layer of ceramer. Then begin the preparation of the fibrous skeleton: determine the required length of tape from the fiber (for example, from microtechnology) by pre-measurement using thick strands which are wrapped around 6-8 times the teeth 1, 2, between which it is necessary to put the prosthesis. The ribbon of fibers obtained the length of the permeate liquid composite and cut into 6 or 8 equal strips that are stacked on each other, receiving thus the tape a certain thickness. Next, tape stretch in length, determine its middle (figure 1) and start the initial formation of the frame by fixing on the cult 1 tape as nakedlolita (figure 2), get on the contact surface of the stump 1, i.e. opposite the connecting beams (core 2), then perform the twisting of the ends of the tape in a spiral (figure 3) with the maximum tension at the contact surface, i.e. on the side of the connecting beams, and rolled to the next stump 2, and the tape must be kept upright when twisting, the remaining ends of the tape is fixed with the overlapping ends of the tape 2-3 mm (figure 4) or fixing the residual limb 2, treated as tab (figure 5).

Between stubs 1 and 2 received the connecting beam, tightly fixed on the stumps, and the length of the beam is not more than 22 mm, the tooth 2 prepared under occlusive tab. Then, the received frame will polimerizuet in the oven with ultraviolet rays for 10 minutes, the wavelength between 450 and 550 nm.

Then the frame is covered with karemera layer - by-layer cervical layer, dentin and enamel, followed by polymerization in an oven with ultraviolet rays for 10 minutes, the prosthesis is polished.

Ceramer is the material of new generation, is an organic matrix, filled with submicron ceramic particles, due to specially selected size of ceramic filler has achieved its high density. Ceramer can also be called an organically modified ceramics. Use these Creamery as belle GLSS (Kerr), Solidex (Shofu), Ceramage (Shofu), NanoPag (SCHUTZ DENTAL GROUP) and others

The finished bridge is fixed on the cult adhesive method using a polymer cement is a dual-cured.

Received bridge based on a frame made of a fibrous material coated karemera, has several advantages compared to metal structures, namely:

1. The precise positioning of the fiber cap to the stump of the tooth. The lack of pre-fitting.

2. Supragingival the location of the ledge and the absence of injury to the gums crown, inflammation, allergic processes.

3. Keratopathy material has a higher damping capacity than ceramics, softer hands chewing pressure on the abutment teeth, and leaves them periodontium that is very significant, if as a support implant is used.

4. Color correction and correction forms quickly and easily feasible.

5. Aesthetic characteristics of this prosthesis:

a) semi-transparent (not opaque layers);

b) Shine, indistinguishable from ceramics;

C) the possibility of color correction;

g) in the neck, possible a smooth transition from the artificial crown to the tooth tissues, the possibility of applying an individual pattern.

6. The technology does not require casting, so the manufacturing process is dramatically reduced and simplified.

7. Cost data PR is tesav less than the cost of ceramics in the absence of foundry equipment and foundry technology.

8. The prosthesis is much easier cermet, which is especially important when extended structures.

9. Fixation of the finished restoration is carried out by means of polymer dual-cured cements that ensures high durability and reliable physical-chemical bond between the crown and the stump of a tooth.

10. Comparing the strength of metal structures and metal-free prostheses, it is possible to emphasize the following points:

- strength ceramic coating below karamanou, due to the fragility of the first and the elasticity of the latter, and due to the monolithic chemical compounds with the cladding skeleton unlike compounds of metal and ceramics.

11. Maintainability design in the oral cavity, as is compatible with microhybrid composite materials.

12. The length of the fibrous skeleton for the bridge may be equal to 22 mm

1. The method of manufacturing the frame of the bridge of fibrous materials, including dissection of the tooth under the crown, removing the cast, the production of the folding model, the formation of the fibrous skeleton and its polymerization, characterized in that the dissection of the tooth under the crown comply with circular naddesnevyh the ledge width of 0.8-1.3 mm, and on the occlusal surface of 1.5-2.0 mm, the folding model is applied rubbery lacquer to follow is its drying at room temperature, on the stump teeth apply a thin layer of karemera, and the formation of the fibrous skeleton of the bridge is carried out by pre-measuring the required length of the fibrous tape, impregnating it with a liquid composite, cut into 6 or 8 equal strips and overlapping each other to obtain a laminated tape, stretching the multilayer Lena length and determine the middle, then finished multilayer fibrous tape in the form of a coupling loop is fixed on the cult of 1, the ends of the tape are combined and twisted in a spiral with the maximum tension on the side of the connecting beams to the next stump 2, which wrapped the remaining ends of the tape and then secured them to the cult 2, prepared under the crown, with the overlapping ends of 2-3 mm or fixing the residual limb 2, treated as a tab, then the frame is covered with layers karemera - cervical layer, dentin and enamel, and after curing, the finished prosthesis is polished.

2. The method according to claim 1, characterized in that the polymerization of the frame is carried out in a furnace with UV radiation, the wavelength of which is equal to between 450 and 550 nm.



 

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