SU1498485A1 - Pivot tooth - Google Patents

Abstract

The invention relates to medicine, namely to orthopedic dentistry, and can be used to replace defects of the crown of the teeth. The purpose of the invention is to increase the strength by preventing tooth splitting. The device consists of a pin 4, a kappa 1 and a crown 3 parts, the crown part 3 of the pin has a shape corresponding to the surfaces of the crown of the tooth, and the pin is fixed in the channel with the possibility of its extraction

The kappa part 1 is made with a spiked protrusion on the surface and an internal bevel around the perimeter of the cap 2. The invention can be used to restore the anatomical shape of the teeth in both adolescents and adults. 4 il.

Description

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The invention relates to medicine, in particular to the section of prosthetic dentistry, and can be used to restore the anatomical shape of the anterior and posterior teeth in both adolescents and adults.

The purpose of the invention is to increase the strength by preventing tooth splitting.

FIG. 1-4 shows the design of the pin tooth.

The pin tooth contains a kappa part 1, a layer in the form of a cap 2, a crown part 3, a pin 4, a crown part 5 of the pin and a spike-shaped protrusion 6.

The pin tooth is located endodentally in an artificial canal with a rounded bottom, formed in the natural canal of the tooth root, and consists of a kappa part and a structure fixed by a phosphate-cement interlayer, and a coronal part 3 fixed by an eicrol interlayer, connected by means of a pin 4. Corona The kapa part of the tray has the shape of a cap 2, which rests on the crown part of the tooth stump, tightly covering its neck with its peripheral part, which has a 45 ° bevel around the perimeter, and carries the spike-shaped protrusion 6

The coronal part of the tooth stump is prepared to the gum edge, around the perimeter of the stump a 45 ° bevel is performed, the cult takes the form of a truncated cone, the center of the stump and the projection of the natural canal root create an artificial canal 2/3 the length of the root , and with a diameter of 0.83 to 1.25 mm, depending on the grouping of the tooth, the bottom of the artificial canal has a rounded shape. To obtain an accurate impression of the artificial canal, a thin wax bar is filled with an artificial pressure and compress the coronal part of the tooth stump, heat the orthodontic wire with a cross section of 0.5-0.6 mm and insert it through the artificial root canal, which allows to seal the wax inside the artificial canal and get more accurate microrelief of its walls, as well as stiffens and provides a fixing moment when translating a wax composition

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in a plaster cast. A cast is obtained and a plaster model of a dental row is cast. The model is heated by a metal rod, and the entire wax composition is easily removed from the artificial channel. The neck of the stump of a restored tooth is contoured and engraved and lubricated with the insulating composition of the canal wall and the stump of the root.

Pick up the diameter of the graphite rod, the cross section of which should be less than an artificial channel by 0.3-0.5 mm. Round off its inner end, giving it a spherical shape. On the other hand, the channel lumen is filled with softened wax, the stump is well compressed, the boundaries are refined, the graphite pin is heated and introduced through the wax into the channel. They are cooled with a tampon moistened with cold water, and a spike-shaped protrusion 6 is simulated on the wider horizontal surface of the kappa coronal part, removed from the channel for a projecting section of a graphite rod. Carefully inspect the inner contours of the wax pattern of the kappa part of the structure, in the absence of technical imperfections, it is transferred to the casting. The casting is carried out outside the model, but preserving the graphite rod throughout the casting process, at the same time, the graphite core provides rigidity of the wax composition, eliminates the occurrence of casting defects on the inner walls of the root part and ensures the creation of a hollow channel in the latter.

The graphite content is removed from the FIRE of the metal channel and the metal kappa part 1 is fitted in the plaster model, and then in the patient's mouth. During fitting, the kappa part of the structure should tightly enclose the neck of the stump of the root of the tooth being restored around the entire perimeter and fit tightly into the lumen of the artificial root canal. The pin is made of steel orthodontic wire with a cross section of 0.8 to 1.2 mm, depending on the group membership of the tooth being restored. Koronkova. a part of the pin bends with regard to the repetition of the shape of the surface of the crown of this tooth and passes into the root part of the molded tray, the entrance is tight

in the lumen of the channel and reach the bottom,. the spherical shape is attached to the end of the pin. For the manufacture of the coronal (facing) part of the tooth, an impression is obtained into which the metal parts of the structure are transferred (the kappa part with the pin).

A gypsum model is cast, on which the coronal (facing) part of the design of the pin tooth is made using plastic or composite materials. After the coronal part has been manufactured, the final fit of the structure in the oral cavity is performed, taking into account the fine correction with the antagonist teeth and the kappa part 1 of the structure. Fixing the design of the pin tooth in the oral cavity is carried out in stages: first, the kappa part of the structure is fixed on the phosphate-cement, located on the root stump and in the canal, and then on the evicrole corner of the structure to the horizontal part of the mouthguard, including the spike-like protrusion while the root of the pin 4 remains free.

Claims (1)

Invention Formula A pin tooth containing a pin, a kappa and a crown part with an interlayer between them in the form of a cap, characterized in that, in order to increase strength by preventing tooth split, the crown part has the form of an open loop on the surface of the cap in contact with the crown part , the protrusion is made, and the edge of the cap, which aligns with the kappa part, is made with a bevel 45 relative to the longitudinal axis of the pinned tooth. Fi.g.1 Fi.2 ag.Z