Method for crown restoration

FIELD: medicine.

SUBSTANCE: root canal of a broken tooth is filled up to a physiological opening under X-ray control. The root canal is milled at two-thirds of overall length in diameter equal to that of a fibre glass pin to be used in the tooth. A seat protrusion with a cylindrical side surface surrounding a root canal aperture is formed. The milled root canal and an outer surface of the root are imprinted in silicone to produce a model, wherein the fibre glass pin is mounted into the reflected root canal. Intraradicular and supraradicular root inlays are modelled in wax on top of the pin. Along the outline of the modelled inlay, a circular shoulder skewed at an angle of 45 degrees is milled, and the fibre glass pin is removed. The produced wax structure is scanned in a module of CAD/CAM system. The virtual image is transferred to a computer unit, followed by milling of a ceramic block. The produced structure is mounted in the oral cavity on glass-ionomer cement. An artificial crown is made and attached to the above structure.

EFFECT: method enables restoring the broken clinical crown of the tooth and a thinned broken neck subgingival root by means of a permanent orthopaedic structure made of a bioinert material with a possibility to conduct a root canal treatment, if necessary.

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 a method of restoring a tooth with a low clinical crown, which consists in obtaining anatomical impression of the dentition, the manufacture of the working and auxiliary plaster models of the jaws of super plasters and installation of plaster models in the articulator, characterized in that made of cast stump pin tab, form the seat for the locking pin in pricesavvy area stump pin tab on the lingual surface of the teeth of the lower jaw and palatal surfaces of the teeth of the upper jaw, then made an artificial crown with simultaneous formation of the perforations to install the locking pin according to the location of the seats in metal cult pinned tabs (Patent No. 2332187 from 27.08.2008).

The known method of prosthetics in the absence of the tooth crown, which includes the production of cast metal pin copings, its fixation on the tooth and manufacture tab the artificial crown. Before you commit copings on tooth it is treated with a plasma jet, sod�Rasa compound of silicon and carbon, which is precipitated on the surface of the tab layer to a thickness of 1 μm formed on the surface of a pin-core design of oxide-carbide coating composition of the silicon oxide - 80%, silicon carbide - 20% (Patent No. 2284794 from 10.10.2006).

Known way to restore the crown of the teeth, including the use of intracanal pin with stump part and crown, modelled on the core part, characterized in that ear stud with stump part is made of niti TN-10, on the inner surface of the crown in its lateral sides of the recess, the stump portion of the pin is cut in half, heated, diluted halves of the stump to the sides, then operate according to the algorithm # 1 or algorithm No. 2, and algorithm 1 is the following: the pin is fixed in the root canal of the patient so to divorced spouse stump part was in mediodistal plane, the stump portion of the cooled refrigerant, the halves of the stump part of the drive, the crown is fixed with cement on the stump portion, and the algorithm No. 2 is as follows: stump portion of the cooled refrigerant, the halves of the stump driving, the pin is fixed in the root canal of the patient so that the halves of the core part was in mediodistal plane, a crown fixed with cement on cul�network part (Patent No. 2380056 from 27.01.2010).

Known stump inlay 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 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.

The technical result is achieved due to the fact that the method of restoration of crown of chatsubo is endodontic treatment and root canal obturation of the damaged tooth to the natural opening under x-ray control and subsequent dissection by two-thirds of the total length diameter corresponding to the diameter fiberglass pin system planned for use in this tooth, then fissure Bur is used to form the landing ledge with a cylindrical lateral surface around the entrance to the root canal, and then with the prepared root canal and the outer surface of the tooth root get a silicone impression, which is produced by the model of high-strength gypsum, which displays the root canal is installed the fiberglass pin, adapted to the diameter of the channel over which wax is modeled-intra-root part of the pin copings, having the shape of a truncated cone with a cylindrical lateral surface, and netcordia part of root fillings, having the shape of the stump is dissected under a fixed orthopedic design of the tooth, then the circuit is simulated tabs to mill a circular ledge is angled at 135 degrees, and removed the fiberglass pin, after which the wax design is clean in the optical module CAD/CAM system and a virtual image is transferred to a computer unit with subsequent milling of the ceramic block, the resulting structure is fixed in the mouth with the glass ionomer CT at the same time, and recorded the pin component con�trucchi, presents a standard fiberglass pin diameter corresponding to the diameter of the prepared tooth, in the future, this design is made and an artificial crown is fixed.

Due to the fact that the core part is made from ceramic by using computer technology, provides high-precision plate 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 ensures the fixation of the whole structure in the root canal. Features construction material of the pin provide uniform redistribution of the chewing load inside the tooth root. In case you need an endodontic treatment available for the removal of non-removable prosthetic 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 way of restoration of the tooth crown is illustrated by drawings, where:

1 - root

p> 2 - root canal

3 - stump pin tab

4 - core component of root fillings

a 5-intra-root portion of the core component of root fillings

6 - netcordia part of the core component of root fillings

7 is a cylindrical hole inside the head part of the core component of root fillings

8 - pin part pin copings

9 - artificial crown

The way of restoration of the tooth crown is 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 display of the root canal 2 is the fiberglass pin, adapted to the diameter of the channel�. On top of which modeled from wax 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 is extracted ashless 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. In the end milling of obtained core component of root fillings 4 having part 5-intra-root with the shape of a truncated cone and a cylindrical lateral surface, and netcordia 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 preparirovania�about tooth. Further to this design is made and an artificial crown is fixed 9.

The way of restoration of the tooth crown is endodontic treatment and root canal obturation of the damaged tooth to the natural opening under x-ray control and subsequent dissection by two-thirds of the total length of the diameter corresponding to the diameter fiberglass pin system planned for use in this tooth, then fissure Bur is used to form the landing ledge with a cylindrical lateral surface around the entrance to the root canal, and then with the prepared root canal and the outer surface of the tooth root get a silicone impression, which is produced by the model of high-strength gypsum, which displays the root canal is installed the fiberglass pin, adapted to the diameter of the channel, on top of which modeled from wax-intra-root part of the pin copings, having the shape of a truncated cone with a cylindrical lateral surface, and netcordia part of root fillings, having the shape of the stump is dissected under a fixed orthopedic design of the tooth, then the circuit is simulated tabs to mill a circular ledge is angled at 135 degrees, and is extracted fiber media Converter�equestrian pin the resulting wax design is clean in the optical module CAD/CAM system and a virtual image is transferred to a computer unit with subsequent milling of the ceramic block, the resulting structure is fixed in the mouth with the glass ionomer CT at the same time, and recorded the pin component design standard fiberglass pin diameter corresponding to the diameter of the prepared tooth, in the future, this design is made and an artificial crown is fixed.



 

Same patents:

FIELD: medicine.

SUBSTANCE: device is monolithic, of soft polymer with intraoral and occlusive surfaces and a surface facing a nasal cavity. The occlusive surface is configured to mount on a fibrous ring and has retention elements 1-2 mm wide along the whole period of the occlusive part of the device facing the nasal cavity. An outer diameter of the occlusive surface is configured to exceed the diameter of the fibrous ring by 2-3 mm. The intraoral surface is configured to match a patient's hard palate and has a ring on the outer surface.

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1 dwg

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1 dwg

FIELD: medicine.

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FIELD: medicine.

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FIELD: medicine.

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1 ex

FIELD: medicine.

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FIELD: medicine.

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1 ex

FIELD: medicine.

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3 cl, 12 dwg, 3 ex

FIELD: medicine.

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19 cl, 5 dwg

FIELD: medical engineering.

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FIELD: medical engineering.

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FIELD: medical engineering.

SUBSTANCE: device has vestibular and oral parts connected to each other with crosspieces manufactured from orthodontic wire placed in interdental spaces by producing jaw imprints. Working and auxiliary models are molded. To place treating bandage, general clinical equator of all teeth included into the splint is to be determined on working model using parallelometer. Then, space between the clinical equator line and gingiva and a gingiva part 7-8 mm remote from gingival papillae are covered with dental wax layer of thickness equal to or less than 1.5 mm. Next to it, duplicate model is produced for manufacturing the splint having recess equal to wax layer thickness 1.5 mm. Changing wax for transparent plastic, filing and polishing the splint is carried out by applying method of common use.

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2 dwg

FIELD: medicine.

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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