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Restoration of deformed teeth using photopolymer composite materials from 3M

Restoration of deformed teeth using photopolymer composite materials from 3M

In some clinical cases that occur in dental practice, the dentist faces the problem of choosing which of the possible treatment options is preferable. Using the example of this blog, we show how the restoration of teeth with the use of photopolymer composites made by 3M can in some cases become an alternative to aesthetic prosthetics of teeth.

The patient N. addressed the doctor with complaints about the aesthetic defect of the dentition, which consisted of the displacement of the central line (Figure 1). When asked, the dentist found that orthodontic treatment in childhood was not carried out. Each dentist, who in practice meets with similar problems of dental aesthetics, will probably agree that the simplest way in this case will be prosthetics with aesthetic crowns. However, with this purpose the doctor is compelled to apply total preparation of enamel - the hardest tooth tissue, considerable preparation of dentin and, in addition, as a rule, - depulsing of teeth. Modern restoration materials resemble natural tooth tissues, and their adhesive systems, in particular the latest achievement of the company "3M" - one-component adhesive Bond - provide reliable fixation and high biocompatibility. Thanks to this, it becomes possible to fully restore the tooth tissue in shape, color and transparency in any pathology.

After superimposing the cofferdam, cleaning the teeth and selecting the color of the restorative material, preparation of the projecting vestibular crown part of 21 and 22 teeth was performed. On a large part of the vestibular surface, exposed dentin is additionally prepared for replacement with an enamel composite (Figure 2). Of course, with little preparation of the tooth tissues, it is impossible to use traditional cushioning materials to cover naked dentin, since they impair transparency. It is easy to find a way out if one uses the new one-component adhesive system "3M Single Bond" as an adhesive. Material Single Bond has a high biocompatibility, reliably obturates the dentinal tubules, provides a strong fixation and plays the role of a gasket. At the next stage, the preparation of carious cavities of 11 and 12 teeth was carried out with grinding the vestibular wall and forming the bevel of the enamel. However, at the beginning of the recovery, it is necessary to eliminate the displacement of the central line (Figure. 3).

By grinding the enamel from the medially-approximal surface of the 11th tooth, the correct direction of the central line is achieved. This position of the approximate 11th tooth surface is used as a reference point for the formation of 12 teeth, taking into account the obtained direction of the central line, further grinding of the medial-approximal surface of the 11th tooth and replacement of this area with an enamel composite (Figure 4). Deep portions of carious cavities in teeth 11 and 12  are covered with calcium hydroxide material and a neutral insulating liner. The rest of the dentin remains free and is used to securely fix the composite material with the 3M Single Bond adhesive (Figure 5) .

In the subsequent stages, the base was reconstructed with a hybrid photopolymer composite material, 3M Valux Plus, and the plate coating of the vestibular surface (laminate, veneer) was modeled with the microfilm composite material of 3M Silux Plus (Figure 6-8).

Due to the transparency and refraction indexes, the average between enamel and dentin, the Valuix Plus material very well simulates the tooth structure, without creating visible optical boundaries between the filling material and the tooth tissues, provides high durability of the restoration. The shades of the colors of the Silux Plus material, which is used for the cladding, give the restored surface a natural look, depth and transparency of the natural enamel, and its ability to polish to a mirror gloss ensures an extremely high color stability of the restoration (Figure 9).

Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.1. A patient with a deformation of the dentition and a carious lesion of 11 and 12 teeth before treatment
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.2. After installation of the cofferdam, the crown parts 21 and 22 of the teeth
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig. 3. Fig. Dissected carious cavities 11 and 12 teeth with a formed bevel of enamel on the vestibular surface
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.4. Creating the correct direction of the center line. The approximate tooth surface 11 is now a reference point for modeling 12 teeth
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.5. Deep portions of carious cavities 11 and 12 of the teeth are covered with a calcium-hydroxide composition and a neutral insulating liner
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.6. After treatment with an adhesive system, Single Bond 11 and 12 teeth are ready for restoration
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.7. Formation of the basis of restoration by hybrid photopolymer material 3M Valux Plus
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.8. Creation of a lamellar coating of the vestibular surface by the microfilm composite 3M Silux Plus (vining)
Restoration of deformed teeth using photopolymer composite materials from 3M
Fig.9. Result of restoration after final polishing
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