A method of manufacturing a wire-composite crowns

 

(57) Abstract:

The invention relates to medicine, namely to the field of dentistry, in particular to a method of manufacturing a wire-composite crowns defects of the tooth crown. The technical result of the invention consists in the full restoration of the anatomical form, function and appearance of a damaged tooth, preventing chipping and bruised, increase the durability of the coronal part of the tooth along with high aesthetics, gentle dissection of the stump of the tooth. A method of manufacturing a wire-composite crowns defects of the tooth crown, includes odontophoridae stump of a tooth to give it a cylindrical shape and is formed at the gingival level of the ledges on the vestibular and oral surfaces and retention points in a horizontal grooves depth of about 0.2 to 0.3 mm Depth of grinding the tissues of the stump is 0.9 to 1.2 mm, the Formation of the carcass crown is carried out in accordance with the form of pre-fabricated plaster model formed stump. The frame is formed from gold plated metal mesh with a thickness of 0.4 mm cells, and before the reconstruction/restoration of the coronal part by applying a composite are the correction of the anatomic shape of the grid-based composite crown part and carry out its fixation on the cult through cement.

The invention relates to medicine, namely to the dentist, to the method of manufacturing a 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, acute and chronic injuries. As a therapeutic means when the defects of the tooth crown is used mainly dentures tab and artificial crowns [2-3, 5, 8-12]. Tab - fixed microproces part of the tooth crown. Is used to restore tooth form. Currently, there are several types of tabs: all-ceramic, composite, metal, composite, tabs IPS Impress, computer tab “Sages” [4, 6, 7]. The crown is a non - removable denture, full restores anatomical form, function and appearance of a damaged tooth. Depending on the material there are crowns: metal (alloys of noble and base metals), non-metallic (plastic, porcelain), combined (metal coated with plastic or porcelain). Crowns are more traditional and accessible, efficient and effective method of repair of defects of the dentition, sravnyenii or chipped tooth from further destruction.

• To correct an irregular shape and broken colour of the tooth.

• To strengthen the remaining tooth, when this cannot be achieved by sealing or by using the tab.

• To be a support for the bridge.

Closest to the technical essence is taken as a prototype ceramic veneer frame chewing teeth Kuwata [1].

Disadvantages of metal-ceramic crowns:

1. The inability of prosthetics with small crowns in vestibuloocular and mesiodistal directions, in particular the lower incisors.

2. The inability of the prosthesis with low clinical crowns.

3. The inability to apply when the malocclusion (deep cutting overlap).

4. Impossibility of the use of children.

5. The inability to apply in people with periodontal disease, bruxism, epilepsy.

6. The need to prepare a large number of hard tooth tissues (1,5-2,0 mm).

7. Most likely a thermal burn of the pulp.

8. The necessity of using retraction thread.

9. The need for removal of tooth pulp of the teeth in the case of tilt.

10. The complexity of odontophoridae (Oh) crown on the prepared tooth.

12. Complex, multi-step fabrication process.

13. Difficulties in simulating transparency teeth.

14. Color change due to the metal frame.

15. The duration of manufacture (requires multiple visits).

16. The difficulty fixing.

17. During cementation of the prosthesis inside the crown creates an increased hydraulic pressure of the cement.

18. The penetration of the locking cement in the gingival crevice.

19. There is no possibility to dorregaray color.

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

21. Functional overload of periodontal.

22. Cause inflammation of the gums.

23. Frequent chipped ceramic lining.

24. Possible rastamaniak crowns.

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

26. The high cost.

The purpose of this invention is the complete restoration of the anatomical form, function and appearance of a damaged tooth, preventing chipping and bruised, to increase the durability of the tooth crown, along with high aesthetic qualities.

the reports periodontal tissues.

3. The opportunity to carry out laboratory stage as doctor and dental technician.

4. Low cost price.

5. The ease of construction.

6. Grid-based composite crown is made quickly and predictably.

7. Low cost price.

8. Net framework provides high strength crowns.

9. A simplified method of manufacturing crown.;

10. Lightweight robust design.

11. Eliminates the process of casting frame.

12. Speeds up the recovery time of the defect.

13. Reduces time consumption.

14. Increases economic effect.

15. Grid frame due to the cellular structure provides a complete fixation of the structure.

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

17. The mesh structure of the mesh provides a strong connection portions of the composite between a and prevents chips and split.

18. Dual adhesive and masking processing grid framework not only helps to improve the bond strength of the composite, but at the same time eliminates the discoloration of the crown.

19. The grid frame in combination with sovremennoi her weak boundaries between layers, which ensures the reliability and efficiency of crowns.

20. Grid-based composite crown is alternative metal, non-metallic and combined crowns.

21. Net framework enables simulation of a coronal part of a tooth.

22. Wire frame allows you to restore torontobuy part of the tooth the easiest way.

23. The cellular structure of the grid frame provides retention and aesthetic effect.

24. The ability to create access through the perforation, without removing the crown, if necessary endodontic intervention.

25. The ability to remove quickly and easily satchelmouth crown if necessary.

26. Gold plated wire frame provides shade similar to dentin.

27. Yellow metal mesh layer composite illuminated smaller and looks more natural and provides a natural looking crowns.

28. Gold plated wire frame are not only aesthetic, but also compatible with composite and tooth tissues.

29. The many colors of the composite contributes to the achievement of the maximum aesthetic result.

30. Gold plated mesh Karka the LASS="ptx2">31. Pozolochennuyu wire frame helps to reduce shrinkage of the composite material and leads to improved marginal seal of composite to the tooth hard tissues.

32. Gold helps to reduce stress (stress), which occurs during polymerization.

33. Grid-based composite crown ensures the prevention of possible complications chips and bruised and increases the durability of the crown.

Grid-based composite crown is made as follows.

I Clinical stage

1. Specifies the color of the crowns.

2. Pain.

3. Odontophoridae.

4. Taking impressions.

Laboratory stage

1. Casting models.

2. Fixation models occludator.

3. The formation of the grid frame crowns.

4. Fabrication of crowns.

5. Correction crowns.

6. Grinding and polishing.

II Clinical stage

1. Fitting crowns in the mouth.

2. Fixing the crown.

Clinical and laboratory stages of manufacturing wire-composite crowns.

I Clinical stage.

Removing dental plaque and color definition.

Do pastes for removal of dental about the and at low rpm drill motor to prevent injury to the gingival margin. After that, the teeth are thoroughly washed with water. To define a color using a standard scale VITA. Color matching is carried out at daylight. The patient should be in a vertical position, the mouth is at eye level physician who is between the patient and the light source. Choose the color of the body of the tooth, further define the shades that are required to build color composition of the tooth. For optimal cvetovetete natural appearance of the tooth reproduce it using the composite materials of different colors and varying degrees of transparency (more transparent enamel and less transparent - opaque or dentinal shades).

The anesthesia. The application of local anesthesia to prevent possible pain.

Odontophoridae. Carry out the grinding of hard tooth tissues tools with diamond coating in combination with an air-water cooling. Start with the preparation of a chewing surface, using a special barrel-shaped or spike-shaped diamond head. Tops chewing cusps of the curve. Further separation disc or conical Burr zashlifovyvajut contact (approximal) the surface of the gums. Bor tubulares and oral surfaces produce similar contact, creating at gingival level ledge. The thickness of the grinding tissue is 0.9 to 1.2 mm, in order To improve the fixation on the stump of the tooth shape retention points in a horizontal furrow depth of about 0,2-0,3 mm

Taking impressions. Perform alginate mass. Both prints evaluate the display quality of the prepared stump of a tooth. Then the casts are sterilized in an antiseptic solution.

Laboratory stage.

Casting models. Cast combined collapsible model of the dentition. Auxiliary model cast from plaster, and the working of super plasters. Fold the model in the Central occlusion and fix them in occludator.

The formation of the grid frame crowns. For the formation of the grid frame using gold plated metal mesh thickness 0.4 mm firm "Renfert" grid cut out a square of 22 cm, the corners and 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 a plaster tooth stump. Then Cremonini and beaked forceps form a grid frame in such a way that it matches the contours of the stump of the tooth. Then try on the frame for plaster tooth stump.

raspredeleniya and polimerizuet standard method. Then put the second layer of adhesive and repeat manipulation. To improve the aesthetics of the crown on a grid frame put masking agent, which evenly distribute a thin layer stream of air. Will polimerizuet standard method. Then put masking agent second layer, spread it and will polimerizuet. Grid-composite frame set plaster on the tooth stump. Then hold the restoration/reconstruction of the coronal part of the tooth with composite materials according to the instructions.

Grinding, polishing. Using finishing burs for grinding, plastic and rubber heads, strips, soft floppy disks. To apply polishing polishing pastes. The criterion of quality polishing is the emergence of “dry” Shine on all surfaces of the crowns.

II Clinical stage.

Fitting and fixing of crowns in the mouth. Before fitting the crown disinfected. After checking the quality of its fit crown again disinfect, degrease and dry. Cement for fixation of prosthetic crowns fill one third of the crown, covering its walls. A crown put on the tooth and ask the patient tightly to close the teeth. The excess of the hardened cement is removed after 10 St 34 tooth.

History: Two years ago, 34 tooth was covered with stamped crown. Two weeks ago was rastamaniak crowns.

Objectively: the Crown portion 34 of the tooth is destroyed by1/2. Comparative percussion painless.

Diagnosis: Defective coronal part 34 of the tooth.

Treatment: Mechanically surface of the teeth adjacent the defect, clean toothbrushes using toothpastes and determine a suitable color according to the standard scale VITA. Put a portion of the composite on the tooth surface for clarification and comparison of the selected color from the source.

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 an air-water cooling. Start with the preparation of a chewing surface, using a special barrel-shaped diamond head. Tops chewing cusps of the curve.

Further separation disc or conical Burr zashlifovyvajut contact (approximal) the surface of the gums. Boron is positioned so that the walls of the tooth are parallel, and the stump had a cylindrical shape. Dissection of the vestibular is ivania tissue is 0,9-1,2 mm To improve the fixation on the stump of the tooth shape retention points in a horizontal furrow depth of about 0,2-0,3 mm

Remove the prints using alginate mass. Then the casts are sterilized in an antiseptic solution. Cast combined collapsible model of the dentition. Auxiliary model cast from plaster, and the working of super plasters. Fold the model in the Central occlusion and fix them in occludator.

For the formation of the grid frame using gold plated metal mesh thickness 0.4 mm firm "Renfert". Metal mesh is used to strengthen plastic dentures (the Directory. Products for dental technicians 2001-2002, pages 102-103). Grid cut out a square of 2 cm, the corners and 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 a plaster tooth stump. Then Cremonini and beaked forceps form a grid frame in such a way that it matches the contours of the stump of the tooth. Next, the grid frame is removed from the plaster model and cover with adhesive 3MTMSINGLE BOND DENTAL ADHESIVE SYSTEM Directory. Dental materials 2001. 3M Dental, page 6), lightly blow air for R is t manipulation. To improve the aesthetics of the crown on a grid frame put masking agent - 3MTMRelyXTMCERAMIC PRIMER (the Directory. Dental materials 2001. 3M Dental, page 11), which evenly distribute a thin layer stream of air. Will polimerizuet standard method. Then put masking agent second layer, spread it and will polimerizuet. Then hold the final restoration/reconstruction of the coronal part of the tooth compositetype materials for chewing teeth groups - 3MTMFILTEKTM(The directory. Dental materials 2001. 3M Dental). Correct the size, form and occlusal surface of the crown.

Grind and Polish grid-based composite crown. Using finishing burs for grinding, plastic and rubber heads, strips, soft floppy disks. To apply polishing polishing paste.

Try and capture the crown in the mouth. Before fitting the crown disinfected. After checking the quality of its fit crown again disinfect, degrease and dry. Cement for fixation of prosthetic crowns fill one third of the crown, covering its walls. A crown put on the tooth and ask the patient tightly to close the teeth. The excess solidified the economic form, the function and appearance of a damaged tooth. Complications of the above method have been identified.

The sources of information.

1. Kazunari Ohata. Ceramic veneer frame chewing teeth Kuwata. The quintessence. 1991, No. 1. - S. 53-65. The prototype.

2. Abolmasov N. G. Prosthetic dentistry Moscow: Medpress-inform. 2002. - S. 211-219.

3. Aparin centuries Prevention of complications in the application of metal-ceramic prostheses. Journal Of Dentistry. 1981, No. 2. - S. 34-36.

4. Bessmertny, C. long-term results of prosthetic tabs. Journal Of Dentistry. 1990, No. 6. - S. 63-64.

5. Kopeikin Century. N. Prosthetic dentistry. M - 2000, S - 156-165.

6. Petrosyan D. E. Application of ceramic tabs when restoring the occlusal surfaces of the teeth. Journal Of Dentistry. 1997, No. 5. - S. 49-51.

7. Rogozhkin, I. Restoration of hard tissues of teeth tabs. The C - 2002. - S. 40-51.

8. Ryakhovsky A. N. Marginal fit as a criterion of quality prosthetics fixed prosthetics. The magazine “Dental technician” No. 3. 2000. - S. 15-17.

9. Hudonogov, N. The potential application of metal-free dentures made of ceramics. New in dentistry. 1995, No. 2. - S. 14-17.

10. Kristian W. the New all-ceramic korkie bridges: sufficiently tested in practice? The quintessence. 1993-1994, No. 32-39.

12. Iohn A. In - Ceram technology fabrication of all-ceramic bridges. The quintessence. 1993-1994. - S. 39-74.

A method of manufacturing a wire-composite crowns defects coronal part of the tooth, including odontophoridae stump of a tooth to give it a cylindrical shape and is formed at the gingival level of the ledges on the vestibular and oral surfaces and retention of items in horizontal grooves depth of about 0.2-0.3 mm, and the depth of grinding the tissues of the stump is 0.9-1.2 mm, forming the skeleton of the crown in accordance with the form of pre-fabricated plaster model formed the stump, and the frame is formed from gold plated metal mesh with a thickness of 0.4 mm cells, and before the reconstruction/restoration of the coronal part by applying composite material to the frame, the frame is mounted on the plaster model and cover the double-masking agent, carry out the correction of the anatomic shape of the grid-based composite crown part and carry out its fixation on the cult through cement.

 

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2 dwg

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