Dental post-and-core

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to orthopaedic dentistry, and can be used for restoring a clinical crown lost as a result of an injury or a developing caries. A dental post-and-core consist of two components: post and core. The post component is made of ceramics by computed milling and has an inlay that can be precisely fixed to walls of a prepared root canal, and a supraradicular portion in the form of a stump of a tooth prepared for permanent dental structure with a circular step inclined at an angle of 135 degrees. A cylindrical opening for the core in the form of a standard fibre-glass pin of classical typical sizes is formed inside the post throughout its length. A diameter of the prepared root canal is equal to a diameter of the fibre-glass pin.

EFFECT: invention enables restoring the damaged crown and the dwarfed, damaged neck subgingival part of the root canal with the permanent dental prothesis made of a bioinert material with enabled endodontic re-treatment as it may be required.

1 dwg

 

The invention relates to medicine, namely to orthopedic dentistry, and can be used to restore the clinical crown of the tooth, are missing as a result of injury or development of carious process.

The prior art discloses molded pin tab from the metal containing cult part with non-parallel channels and placed them in the pins, characterized in that it is provided with a rod having a fixed conical thickening at the lower end and movable in the axial direction of the conical thickening at the upper end, the channels on the outer surface of the copings made with extensions, the pins are made tubular with a longitudinal cut at both ends, forming the petals, while the rods are installed in the tubular pins and conical thickening at the lower end has a wide portion corresponding to the outer diameter of the pin, and installed at the bottom of the pin (patent No. 2201170 from 27.03.2003).

Known cast of the cult of a pin or tab that contains the iconic part and a pin part, one of the pins which are arranged to move in the stump part of the tab, characterized in that the movable pin has a constant diameter throughout its length, and its working portion is in the form of a series of consecutive truncated cones, facing a large base�against the side hole tooth, and has a rounded end (patent No. 2098040 from 10.12.1997).

Iconic tab to restore the anatomical shape of the coronal portion of the remaining fragment of a multi-rooted tooth after root resection, characterized in that it is made in the form of a folding of the truncated cone, and by its larger base has a sealed hole protruding parts of endodont-endosseous implants placed in non-parallel root canals of the tooth and connected to the tab by means of a glass ionomer cement, and the holes are under endodont-endosseous implant made in every part of the takedown of a truncated cone, and the number of its parts corresponds to the number resourceroundup roots of the tooth, one part is made with the possibility of sliding on its contact surface to surfaces of one or two other parts when installing them on endodont-endosseous implant (patent No. 2098040 from 10.12.1997).

Iconic tab containing the crown part, made in the form of a truncated cone, root cone portion, wherein the crown portion is formed with two longitudinal holes, in which are placed two buccal pin, the dimensions of which correspond to the buccal root canals (EN 53143 U1, 10.05.2006).

Known published application for invention - pin ceramic stump inlays�ka, manufactured by obtaining a two-layer two-step stamping and manufacturing of model, which is then (work area) is clean apparatus, such as InEos (Sirona, Germany) and converted to a 3D model on the computer, the next is to virtual modeling tab on the software, such as Cerec 3D (Sirona, Germany), followed by milling the tabs (Priority help 2009107782/14, 05.03.2009).

Known stump inlay for three-channel restoration of the tooth after endodontic treatment with non-parallel channels containing the crown portion made integral with the tabs for insertion into two parallel channel, wherein the third tab in the root is made in the form of a standard anchor pin entered in pre-prepared for him a channel through hole formed in the coronal portion (EN 50812 U1, 27.01.2006).

The problem to be solved by the invention is to restore chewing efficiency of a patient with a broken teeth crowns.

The technical result of the invention consists in the restoration of damaged and thinning crowns, destroyed, subgingival cervical part of the tooth root fixed prosthetic construction of a bioinert material with the possibility of carrying out, if necessary, re-endodontic treatment�deposits.

The technical result is achieved due to the fact that the stump pin tab consists of two components-core and pin, connected among themselves by cementing, where the core component is made of ceramic using computer technology and has a-intra-root and nadkarni parts-intra-root part has the shape of a truncated cone with a cylindrical lateral surface, and netcordia part has the shape of the stump is dissected under a fixed orthopedic design of the tooth and the circular ledge is angled at 135 degrees, the inside core portion throughout the length of the cylindrical hole passes, which subsequently is fixed a pin component design, presents a standard fiberglass classic pin sizes.

Due to the fact that the core part is made from ceramic by using computer technology, provides precise its fixation to the walls of the root canal, the lack of galvanic currents and staining of the gums that can occur when using metal alloys, as well as enhancing the aesthetic characteristics of the subsequent fixed dental prosthetic crowns. The fiberglass pin fixed inside the stump of the tab, occlusive and additionally reinforces the root and ensure�AET fixing the whole structure in the root canal. Features construction material of the pin provide uniform redistribution of the chewing load inside the tooth root. If necessary re-endodontic treatment possible removal of fixed prosthetic constructions and mechanical removal of fiberglass pin, stump part remains unchanged as it is reliably fixed to the walls of the root canal that is functionally and economically beneficial for the patient.

The proposed device pin copings is illustrated by drawings, where indicated:

1 - the root of the tooth;

2 - root canal of the tooth;

3 - pin cult tab;

4 - iconic component of root fillings;

A 5-intra-root portion of the core component pin copings;

6 - netcordia part of the core component pin copings;

7 is a cylindrical hole inside the head part of the core component pin copings;

8 - pin part pin copings;

9 - artificial crown.

Tooth replacement with the use of the proposed root fillings performed as follows. Seal up the root canal 2 root damaged tooth 1 to the natural opening under x-ray control. Standard scan� dissect the root canal 2 two-thirds of its total length. The diameter of the prepared canal should match the diameter fiberglass pin 8 which are to be used in this tooth. Further fissure Bur is used to form the landing ledge with a cylindrical lateral surface around the entrance to the root canal. With the prepared root canal 2 and the outer surface of the tooth root get 1 silicone impression, which is produced by the model of high-strength gypsum. On the model in the mapping of the root canal 2 is the fiberglass pin, adapted to the diameter of the channel over which wax is modeled part 5-intra-root root fillings 3 having the shape of a truncated cone with a cylindrical lateral surface, and netcordia part 6 pin copings 3, having the shape of the stump is dissected under a fixed orthopedic design of the tooth. Next on the circuit is modeled tabs to mill a circular ledge is angled at 135 degrees, and removed the fiberglass pin. The resulting wax design is clean in the optical module CAD/CAM system, and a virtual image is transferred to a computer unit, then milled from a ceramic block. As a result of milling the obtained core component of root fillings 4 having nutricare�second part 5 with the shape of a truncated cone and a cylindrical lateral surface, and nadkarni part 6 in the form of the stump is prepared for fixed prosthetic tooth design with a circular ledge is angled at 135 degrees, the inside core portion throughout the length passes a cylindrical hole 7. The resulting structure is fixed in the mouth with the glass ionomer CT, at the same time and recorded the pin component design 8 represented by the standard fiberglass pin diameter corresponding to the diameter of the prepared tooth. Further to this design is made and an artificial crown is fixed 9.

Pin stump inlay, consisting of two parts: core and pin, core component made of ceramic using computer technology and has a-intra-root part, made with the possibility of its precise fixing to the walls of the prepared root canal, and nadkarni part in the shape of the stump is prepared for fixed prosthetic tooth design with a circular ledge is angled at 135 degrees, and the inside core portion throughout its length formed with a cylindrical hole of the pin portion in the form of standard fiberglass pin classic sizes, and the diameter of the prepared root canal of a tooth with�corresponds to the diameter fiberglass pin.



 

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FIELD: medicine.

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FIELD: medicine.

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FIELD: medicine.

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FIELD: medicine.

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1 ex

FIELD: medical engineering.

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FIELD: medical engineering.

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FIELD: medical engineering.

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SUBSTANCE: method involves reinforcing crown part defect with wave-shaped wires. The wires are taken in advance from gold-coated metal network, Ѕ tooth root length long wire portion is twisted and fixed in the canal. Free ends of the wires are distributed along vestibular surface of tooth cutting edge and bent towards vestibular tooth surface 1-1.5 mm below the cutting edge. Free ends of the wires are fixed in oval tooth cavity on the vestibular tooth surface side. Artificial enamel layer is produced from macrofilled composite material anatomically matching in shape the incisor crown part, fixing the wave-shaped wires in composite material. Artificial dentine is produced from microfilled composite material.

EFFECT: high strength of incisor walls; long service life under chewing loading.

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.

FIELD: medicine.

SUBSTANCE: method involves applying preparative endodontic treatment, fixing reinforcing net in prepared cup-like tooth cavity formed and produced in root base zone. The cup-like tooth cavity is formed after having temporarily fixed crown part walls along the fracture line using enveloping composite ring, gingiva retraction and preparing demineralized tissues. The crown part walls are formed from composite material keeping to anatomical shape of tooth under restoration after having fixed root fracture with glass ionomer cement being used. The net is shaped in advance to make it congruent to cavity of tooth under restoration and fixed in the cavity by means of fluid composite. The formed cavity is filled with microfilled composite. Macrofilled composite is used for building tooth crown part and tubercles.

EFFECT: high strength of the structure; long service life.

FIELD: medical engineering.

SUBSTANCE: method involves carrying out electrochemical degreasing metal prosthesis carcass surface, anodic etching and cathodic etching and then coating with 0.1-0.3 mcm thick primary gold layer from acid electrolyte. Next to it, 40-50 mcm thick basic gold layer is deposited from alkaline electrolyte.

EFFECT: improved esthetic properties; lowered toxic properties of alloy.

FIELD: medical engineering.

SUBSTANCE: method involves producing plaster jaw model from imprints taken in advance and modeling half-finished wax bite cap article next to it. Silicon mould is manufactured by applying manual molding method with through sprue holes used for filling space, produced after removing half-finished wax bite cap, with plastic. The silicon mould is withdrawn after having plastic polymerized, flow gates are cut off and their attachment places are polished.

EFFECT: simplified process; normalized lower face part height.

1 dwg

FIELD: medical engineering.

SUBSTANCE: method involves molding plaster jaw models from obtained anatomical imprints. Then, intermediate modeling of future dental bridge structure is carried out using wax, dental row plaster model segment imprint is produced on the area restricted with bearing teeth, intact dental row plaster die is manufactured, transparent dental kappa is produced from acryl using hot forming and adjusting abutment teeth stumps imprints and marginal area of intermediate portion of temporary dental bridge structure.

EFFECT: high strength; stable tooth row occlusion.

FIELD: medicine.

SUBSTANCE: method involves applying endodontic treatment of root, fixing pin manufactured from gold-coated metal gauze having free wires on opposite ends and repairing dental crown part with composite materials depending on particular morphological features of the dental row and length of area between the abutment teeth, to be substituted. The pin is fixed in root canal and mediodistal slot made in advance on its base with twisted wires. The wires on the opposite ends are bent towards vestibular side and additionally fixed with beams fixed in advance on the abutment teeth. The wires are brought above the upper and under lower beams. The beams and wires are treated with masking agent before repairing dental crown part.

EFFECT: enhanced effectiveness in restoring functional and esthetic properties of dental row; accelerated treatment procedure; reduced risk of traumatic complications.

2 cl

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