The use of ormokers in dentistry: classification and advantages

In dentistry they use matrices, which serve to temporarily restore the missing wall of the tooth during the filling of the carious cavity. It is impossible to make a high-quality filling without such a matrix.

In dental practice, matrices are used to simplify the filling process when recreating the shape of the tooth. They also protect the marginal periodontium from excess filling material.

Matrix systems are used in the restoration of the tooth cavity.

Features and classification of matrix systems

Due to the matrix used during filling:

• the filling material is retained in the cavity;
• the adaptation of the material in the area of ​​the gingival wall is improved;
• the correct contour of the contact surface is created;
• the cavity is protected from the ingress of blood and gingival fluid.

Matrices that are used for filling must meet the following requirements:

• have a conical shape;
• do not interfere with the creation of a seal;
• withstand the pressure of the filling material;
• do not deform from fixing devices;
• protect the gingival margin from the filling substance;
• be located very close to the tooth.

Matrices are:

• separation - used to separate teeth;
• protective;
• contouring - used to simulate the shape of the tooth.

Depending on the material of manufacture:

• plastic - polyester or lavsan;
• metal - steel or titanium;
• combined - plastic or metal.

By form:

• convex;
• flat;
• curved.

The type of matrix is ​​selected depending on the shape of the tooth and the location of the carious cavity.

What is Ormoker

The most demanded service in the practice of a dentist is the restoration of defects chewing and frontal teeth. The filling technique should be very quick and extremely simple. This goal can only be achieved using special filling materials.

Ormockers were developed by German researchers from the city of Würzburg in the 90s of the XX century. This is a new group of restorative filling materials, which is actually a matrix system and dental cement.

In other words, it is organically modified ceramics. But more precisely, ormocers are the initial monomers that undergo a photopolymerization reaction with the participation of methacrylate groups.

This material is an organic silicon compound with a large number of methacrylate groups as substituents. Polymerization is reduced to a more coherent spatial structure. And the release of residual monomer after the very polymerization of ormokers is almost completely absent.

Materials can release phosphates, fluoride and calcium ions. The presence of the polysiloxane mesh significantly reduces the shrinkage of the filling material during the polymerization process.

Ormokers are filled with particles of modified glass and ceramics. Particle size - 0.01- 0.7 μm, respectively, these are microfilled composites. Special adhesive systems have been created for orromocers. Filling with this material is one of the best dental restorations. With the help of orromokers, filling of I - V classes of cavities is carried out.

Ormoker is a material composed of glassy particles and polymer components. They are as hard as glass, but at the same time have the properties of plastics.

What is the material for?

Ormoker applies:

• for splints;
• to eliminate various defects;
• reconstruction / restoration of anterior teeth;
• veneers of discolored anterior teeth;
• repair of facets;
• modeling of stumps;
• for restoration: correcting shape, shading and shaping aesthetic appearance.

general characteristics

This product has high strength, very little bacterial adhesion, color fastness. Belongs to the class of condensable filling cements. It was created due to the improvement of the organic matrix. Ormoker is an organic-inorganic hybrid substance. Each component of this material has its own characteristics.

For example, organic compounds are responsible for changes in hardness and polarity. Long polysiloxane chains reduce the shrinkage of a given substance during polymerization. Ormoker does not release residual monomer. The polysiloxane mesh, which is located in the ormoker matrix, significantly increases the pressure resistance, as well as the resistance to bending, discoloration, and abrasion.

Inorganic elements, which are glass and ceramics, are responsible for temperature as well as chemical resistance. Polysiloxanes, that is, inorganic-organic particles, affect the elasticity indicators.

Classification

Depending on the method of curing, ormokers are:

1. Light curing.
2. Chemical curing.
3. Dual curing.

Depending on the destination:

1. For filling chewing teeth.
2. For filling anterior teeth.
3. Universal.

Depending on the degree of filling with an inorganic filler, there are:

1. Strongly filled (more than 75%).
2. Medium filled (66% -75%).
3. Weakly filled (less than 66%).

Indications for use

Using Ormokers:

• for composite restoration in carious cavities I and II class;
• in cavities of III, IV and V class according to Black;
• with congenital developmental defects and non-carious lesions;
• production of direct veneers;
• for temporary crowns and bridges;
• when repairing facets of fixed dentures;
• for fixing orthodontic appliances;
• for splinting movable frontal teeth.

Contraindications for use

It is not recommended to use Ormoker:

1. In case of allergic reactions to the components of the filling cement.
2. If you are allergic to methacrylates, you should use those types of ormokers ("Admira Bond", "Definite multibond"), the matrix of which completely binds the monomers.
3. Photopolymerizers during operation change the heart rate of pacemakers and can cause cardiac arrest. In this case, chemical polymerization can be used.
4. In case of loss of a large number of chewing teeth, it is necessary to first carry out the treatment, then carry out the restoration with ormokers.
5. Straight veneers must be preceded by bleaching.
6. Until the age of 25, the use of ormokers is not recommended, since the enamel at this age is immature, which means that the adhesion to the filling material is very low.

Advantages and disadvantages

Ormoker advantages over other materials:

• due to the reduced resin content by 12% in comparison with other filling cements, a high biocompatibility is achieved;
• lower than that of other materials, shrinkage is almost 2 times lower;
• very high strength, typical for both dentin and enamel materials;
• abrasion, which is similar to that of enamel and dentin;
• resistance to fracture and development of microcracks;
• long working time (180 s) due to inclusion in the patented inhibitor system;
• excellent aesthetic properties;
• fluorescent effect.

Representatives

Ormoker group representatives:

1. "Admira" - a filling hybrid material containing an inorganic filler. It hardens in the light. Has very low polymerization shrinkage, excellent abrasion resistance, excellent biocompatibility. Does not release residual monomer. It is used for anterior and posterior teeth, repair of facets, indirect inlays, modeling of stumps. Manufacturer - the company "Voko" (Germany).
2. "Admira Flow" Is a light-curing, filling, flowable cement based on Ormoker. It is used for filling lateral areas, small cavities, repairing fillings and crowns, fixing ceramic prostheses. Has low shrinkage rates, excellent biocompatibility, good elasticity. The manufacturer is the German company Voko.
3. "Admira Fusion" - universal hybrid filling cement based on Ormoker. It is used for the restoration of anterior teeth damaged as a result of trauma, for filling cavities of classes I-V, as a cushioning material (basis for a filling). It is also used in the correction of the shape and color characteristics, for the restoration of the tooth stump, in the manufacture of special composite inlays. It is based only on ceramics, does not contain classical monomers. Has a low polymerization shrinkage. Good biocompatibility. Consistent color performance. The material is published by the German company Voko.
4. "Admira Fusion x-base" - flowable base cement for filling. It is used as a cushioning material as a base for a seal. It is used for class III and V seals. Used to repair minor enamel defects. When repairing temporary bridges and crowns. The material is made on the basis of only one ceramic. Has a very low shrinkage. Excellent performance. Produced by the German company "Voko".
5. "Admira Fusion x-tra" - the latest hybrid filling cement. Used for filling posterior teeth, as a cushioning material (in cavities of I and II class), for filling of class V cavities, for repairing veneers, various enamel defects, for restoration stump. Products based only on ceramics for Fast Track technology. Has a very low shrinkage. Color characteristics are stable. Has a shade with a chameleon effect. Long lasting, has excellent hardness. The manufacturer is the Voko company (Germany).
6. "Admira Fusion Flow" - the latest fluid hybrid filling material. It is used for blocking undercuts, as an adaptive layer in cavities, in filling repairs, veneers and temporary restorations. With its help, it is possible to fix dentures, splinting and joining movable teeth. It is a ceramic-based filling cement. Does not contain classical monomers. Polymerization shrinkage is negligible. Does not change color for a long time. The substance has fluid properties, but only under pressure, and upon completion of the application, it is stable and does not flow out of the cavity. Available in 12 shades for the desired aesthetic restoration. Compatible with Bondin systems. Excellent strength values ​​over a long period of time. The manufacturer is the German company Voko.
7. "DEFINITE Core" (Degussa Dental) is a filling substance consisting of an organic matrix and inorganic fillers. Light-cured material. The manufacturer is the German company "Dentsply".
8. "CeramX" hardens in the light. It is used for the restoration of anterior and posterior teeth. It is the latest ceramic restorative substance. Possesses good plastic properties. Low monomer evolution is a characteristic feature. The manufacturer is the German company DENTSPLY.

Finally

The advantages of Ormokers are excellent biocompatibility due to the minimal release free monomers, as well as very low shrinkage (only 1.9%), which is much less than traditional materials by almost two times. Ormoker has excellent durability and is well and quickly processed during operation.