Method for restoring/restructuring crown part defects with metal reinforcement net carcass being applied

FIELD: medicine.

SUBSTANCE: method involves carrying out odontopreparation, forming cylindrical tooth stump to gingival level, forming a projecting part on this place and fixing net carcass on the stump followed by crown part restoration using composite material. When forming stump, occlusion surface is filed off by 0.9-1.2 mm and additional retention zones like 0.2-0.3 mm deep horizontal grooves are formed on the aproximal surfaces. The carcass is produced from gold-plated metal wire net having 0.4 mm large meshes to fit the stump. Before being fixed, the net carcass is treated twice with masking agent leaving meshes open. Final crown part restoration follows with anatomical tooth shape being taken into account.

EFFECT: fully restored anatomical tooth shape; high strength of tooth walls; long service life; high esthetic quality.

 

The invention relates to medicine, namely to the dentist, to a method of restoration/reconstruction of defects of the crown of the teeth using metal mesh reinforcement frame.

The causes of the defects of the crowns of the teeth are caries and its complications, increased abrasion of hard tooth tissue, acute and chronic injuries, hypoplasia, cracked enamel and dentin, wedge-shaped defects(5, 6, 8).

From the extent of injury and duration of the process depends on the nature and scope of medical intervention. As a therapeutic means when the defects of the tooth crown is used mainly dentures tab and artificial crowns(2, 4, 7).

The closest in technical essence, taken for the prototype are all-ceramic crowns and bridges (1).

The disadvantages of all-ceramic crowns.

1. Complex, multi-step fabrication process.

2. Most likely a thermal burn of the pulp.

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

4. The need for removal of tooth pulp of the teeth in the case of the slope.

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

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

7. The complexity of odontophoridae (create us the UPA, the taper of the walls).

8. The need to produce a temporary (provisional) crown on the prepared tooth.

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

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

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

12. Frequent splits.

13. Possible rastamaniak crowns.

14. When endodontic treatment is the need to remove the crown.

15. The high cost.

The purpose of this invention is: the restoration of the anatomical form, function and appearance of a damaged tooth, preventing chipping and bruised, to increase the durability of the tooth crown.

Advantages of the method of restoration/reconstruction of defects of the crown of the teeth using metal mesh reinforcement frame - MAC:

1. Gentle method of preparation.

2. The defect is restored in one visit.

3. The absence of laboratory steps.

4. Low cost price.

5. The ease of construction.

6. Durability.

7. A simple way to restore korkovoi part of the tooth.

8. Grid-reinforcing frame fixed on the glass ionomers dual-cured cement that provides a complete fixation of the structure.

9. When necessary the particular endodontic intervention it is possible to create access through the perforation, without removing the structure.

10. Grid-reinforcing frame connecting with the photocurable glass-ionomer cement and composite material forms a single piece, providing structural strength.

11. Simplified and direct method of manufacturing a wire-reinforcing frame.

12. Grid-reinforced frame provides reliable mechanical retention restored materials.

13. Grid-reinforced frame provides high structural strength.

14. Lightweight robust design.

15. Eliminates the casting process of the framework.

16. Speeds up the recovery time of the defect.

17. Reduces time consumption.

18. Increases economic effect.

19. The cellular structure of the grid-reinforced frame provides a strong connection portions of the composite between a and prevents chips and split.

20. Good biocompatibility grid-reinforced frame with surrounding tissues of the tooth and composite.

21. Dual adhesive and masking processing not only helps to improve the strength of the connection of the grid-ameruoso frame with composite, but excludes the change of color design.

22. Sturdy construction, since the grid-reinforced frame provides reinforcement of the structure.

23. Grid-reinforcing frame structure in combination with modern adhesive composite m is materials creates a candy bar - multi-layered reinforced construction, without its inherent weak boundaries between layers, which ensures reliability and efficiency of the design.

24. Efficiency modeling of coronal tooth structure.

25. The cellular structure of the grid-reinforced frame provides high aesthetic effect.

26. The cellular structure of the grid-reinforced frame provides natural restoration.

27. Grid reinforcement frame is completely adapted to the anatomy of the stump of the tooth.

28. The ability to create access through the perforation, without compromising the integrity of the design if necessary endodontic intervention.

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

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

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

The production stages of MSAC.

1. Specifies the color of the crown.

2. The anesthesia.

3. Odontophoridae.

4. Fabrication and fitting of MSAC.

5. Preparation of MCAK to commit.

6. Preparation of the stump of a tooth to fixing.

7. Fixation of MSAC.

8. Restoration of the anatomical shape of the tooth.

Specifies the color of the crowns

Mechanical methods for the om surface of the teeth, located near the defect, clean toothbrushes using toothpastes, and determine a suitable color according to the standard scale VITA. Produce retraction of gingival retraction thread.

Anesthesia

To create an enabling and painless work is carried out under anesthesia.

Odontophoridae

After the onset of anesthesia conduct intermittent dissection of the turbine drill with water cooling to prevent inflammation of the pulp.

First carry out the separation of the tooth lamividine and cylindrical forests to create parallelism of the walls and form a ledge stump of the tooth at the gum. Further, abrasive tools zashlifovyvajut occlusal surface by 0.9-1.2 mm Complete preparation removal of tissue from the oral and vestibular surfaces of the protruding above the level of the neck of the tooth, and give the stump of the tooth cylindrical shape. Then on approximal surfaces form retention points, to improve the fixation of MSAC.

Fabrication and fitting of metal mesh-reinforcing frame of MSAC.

Of metal mesh cut out a square 2×2cm, using stopper and beaked forceps form a grid frame and are fitting. Then with scissors cut off the excess and re fitting. Then achieve full compliance by the heights of the, the width and shape of the stump of the tooth. Next, perform a preparation for fixing MAC. Preparation to commit wire-reinforcing frame of MSAC.

Grid reinforcement frame is covered with adhesive. Further, the adhesive lightly blow air for even distribution and polimerizuet standard method. Then put the second adhesive layer, which distribute and polimerizuet.

To improve the aesthetics of the design on a grid-reinforcing frame is applied to a masking agent, which evenly distribute a thin layer of the air stream, leaving open the grid cell. Then polimerizuet within 30 seconds. Then put masking agent, a second layer, which also distribute and polimerizuet.

Preparation of the stump of a tooth to fixing the metal wire reinforcement frame of MSAC.

Spend processing the stump of a tooth. : Gel applied to the stump of the tooth for 30 seconds, then wash off with running water while running the saliva ejector, air dried, apply the adhesive. Further, the adhesive lightly blow air for even distribution and polimerizuet standard method. Then apply the adhesive second layer, also distribute and polimerizuet. Then on retention points stump of the tooth and the inner surface of MSAC put JRC (glass ionomers cement), then fix the frame on the tooth stump and conduct is olymerization. Then hold the restoration/reconstruction korkovoi part of the tooth with composite materials according to the instructions.

The aesthetic effect is achieved after pre-treatment and grinding standard polishing disks of different thickness and grain size of the abrasive, diamond forests, and approximal surfaces of the strips. The correction is performed under the control of the occlusal paper finish using burs and discs. Produce final adviceline.

Thus, this method allows for the restoration/reconstruction of defects of the tooth crown with the use of metal mesh reinforcement frame and to achieve longevity of the restoration of the tooth along with high aesthetics.

Clinical example:

Patient, 34 years.

Complaint: on the aesthetic dissatisfaction of the tooth 14.

History: Earlier 14 tooth was cured about complicated caries, four years ago was made of metal crown. Three weeks ago was rastamaniak crowns.

Objective: Destroyed the crown part of the tooth 1/2. The results of x-rays: channels filled to the top, periapical changes are not observed.

Diagnosis: defective crown part 14.

Treatment: Mechanically surfaces of the teeth adjacent the defect, clean tooth brush is mi with the use of toothpastes, and determine a suitable color according to the standard scale VITA. Produce retraction of gingival retraction thread.

To create an enabling and painless work is carried out under anesthesia. After the onset of anesthesia conduct intermittent dissection of the turbine drill with water cooling. First carry out the separation of the tooth lamividine and cylindrical forests to create parallelism of the walls and form a ledge stump of the tooth at the gum. Further, abrasive tools zashlifovyvajut occlusal surface by 0.9-1.2 mm Complete preparation removal of tissue from the oral and vestibular surfaces of the protruding above the level of the neck of the tooth, and give the stump of the tooth cylindrical shape. Then on approximal surfaces form retention points, to improve the fixation of MSAC.

For the formation of the grid frame, use 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, -p.102-103). Grid cut out a square 2×2 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 grid frame that is they way to match the contours of the stump of a tooth.

Grid reinforcement frame is covered with adhesive 3MTMSINGLE BOND DENTAL ADHESIVE SYSTEM Directory. Dental materials 2001. 3M Dental, P6). Further, the adhesive lightly blow air for even distribution and polimerizuet standard method. Then put the second adhesive layer and polimerizuet.

To improve the aesthetics of the design on a grid-reinforcing frame put masking agent - 3MTMRelyXTMCERAMIC PRIMER (the Directory. Dental materials 2001. 3M Dental, p.11), which evenly distribute a thin layer of the air stream, leaving open the grid cell. Then polimerizuet within 30 seconds. Then put masking agent, a second layer, which also distribute and polimerizuet. : The gel is applied on the tooth stump for 15 sec - 3M SCOTCHBOND ETCHANT GEL (Catalog. Dental materials 2001. ZM Dental, P6), then wash off with running water while running the saliva ejector, air dried, apply the adhesive. Further, the adhesive lightly blow air for even distribution and polimerizuet standard method. Then apply the adhesive second layer, also distribute and polimerizuet. Then on retention points stump of the tooth and the inner surface of MSAC put glass ionomers cement JRC - 3M SCOTCHBOND ETCHANT GEL (Catalog. One hundred is etologicheskie materials 2001. 3M Dental, p.6).

Then fix the frame on the tooth stump and conduct polymerization. Next, perform a restoration of the tooth crown according to traditional methods for chewing teeth groups 3M™ FILTEK™ Z-250. Universal restorative material (the Directory. Dental materials 2001. 3M Dental, p.2).

The aesthetic effect is achieved after pre-treatment and grinding standard polishing discs 3M™ SOF-LEX™ (the Directory. Dental materials 2001. 3 M Dental, p.8) various thickness and grain size of the abrasive, diamond forests, and approximal surfaces of the strips. The correction is performed under the control of the occlusal paper finish using burs and discs. Produce final adviceline.

Thus, this method allows for the restoration/reconstruction of the defect of the tooth crown with the use of metal mesh reinforcement frame. Complications after the restoration/reconstruction of the above method have been identified.

Sources of information

1. Kristian W. the New all-ceramic crowns and bridges - evaluation criteria // Quintessence. 1993-1994, No. 6-32. The prototype.

2. Abolmasov N.G., Prosthetic dentistry, Moscow, Medpress - inform., 2002, s-219.

3. Aparin CENTURIES, Prevention of complications when using metallokhimicheskie //Journal of Dentistry. 1981, No. 2, S. 34-36.

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

5. Borisenko AV and other Composite filling and lining materials in dentistry. Kiev: 2001, s.

6. Borovsky E.V. and other Therapeutic dentistry. M.: Medicine, 1997, pp.163-168, 177-178, 196.

7. Ryakhovsky A.N., Marginal fit as a criterion of quality prosthetics fixed prosthetics // Journal “Dental technician”, No. 3, 2000, S. 15-17.

8. Jordan R.E. // Composite filling and lining materials in dentistry. A.V. Borisenko, V. Desprado. / Kyiv, 2001, S. 200.

9. Iohn A. In - Ceram technology fabrication of all-ceramic bridges // Quintessence. 1993-1994, S. 39-74.

The way of restoration of the coronal part of the tooth with the use of grid-reinforcing frame including odontophoridae, the formation of the stump of the tooth cylindrical shape to gum formation at this level of the ledge and the fixation on the cult metal grid frame, followed by restoration of the coronal part of composite material, with the formation of a stump occlusal surface zashlifovyvajut 0.9-1.2 mm, and approximal surfaces advanced form of retention points in a horizontal grooves depth of 0.2-0.3 mm, with a frame formed from metal p is gilded grid with cells of 0.4 mm in accordance with the shape of the stump, before you commit on a grid frame is applied twice masking agent, leaving the cell open, and the subsequent final restoration of the coronal part is carried out in accordance with the anatomical shape of the tooth.



 

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