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.
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.
SUBSTANCE: metal frame is made of valve metals. It is cleaned and processed. A ceramic layer min. 50 mcm thick is formed on the metal frame by micro-arch oxydation in a water electrolyte solution of aluminium sulphate; the frame is then glazed, and the denture is thermally processed in vacuum at temperatures not exceeding allotropic transformation temperatures in the metal frame, but no more than 830°C, for a hold up time of min 15 minutes. A temperature rise rate shall not exceed 15°C/min, whereas a cool down rate is no more than 7°C/min, while the ceramic layer relates to total coating thickness as 0.6 - 0.8.
EFFECT: by producing the metal-ceramic structures having the desired physical properties and high strength characteristics, the method enables producing the dentures at lower labour intensity, high quality, reliability and aesthetic characteristics.
20 dwg, 10 tbl, 1 ex
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.
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.
EFFECT: invention enables marking the limits of the patient's mouth and nose if observing the postoperative upper jaw defects during individual hygiene activities.
SUBSTANCE: method of repairing a demountable dental prosthesis of the upper jaw consists in matching and fixation of fragments of the demountable dental prosthesis by glue, manufacturing a stone model by the fixed prosthesis, extension by a dental cutter of fracture borders and formation on external borders of retention cavities, parallel to the fracture line, in the quantity of three, on the entire length of the fracture line, equally distant from each other. The ratio of the area of the line, which passes on the fracture line, and the area of the retention cavities must correspond as one to three, while initially the area corresponds to the diameter of the cutter, selected individually by a value obtained as a result of division of the fracture line length by five. After the described preparation the prosthesis is washed, dried, placed on the model, and the formed in the process of milling slots are filled with plastic with the following polymerisation in boiling water under pressure. The obtained prosthesis is processed, ground, polished and fixed in the oral cavity.
EFFECT: restoration of durability and functional characteristics of the broken demountable dental prosthesis by the method affordable for the patient.
SUBSTANCE: in oral cavity of patient in prosthesis bed flexibility of mucous membrane is measured in oral cavity of patient in prosthesis. Borders of poorly flexible areas are determined. Before packing basic plastic paste on model in cuvette, on prosthesis bed borders of poorly flexible areas are outlined. They are extended for 1.5-2 mm in towards flexible areas. Durable insulating material with width not less than value of flexibility of mucous membrane is fastened on said extended boarders of poorly flexible areas. Cuvette with gypsum model is filled with paste of basic plastic and placed under the press. Plastic polymerisation is carried out. After polymerisation prosthesis is extracted from cuvette and processed.
EFFECT: method, due to preparing gypsum model of jaw before packaging basic plastic, makes it possible to reduce excessive pressure, trauma and atrophy of prosthesis bed tissues in the area of poorly flexible areas of prosthetic bed.
SUBSTANCE: computer analysis of the patient's speech material is performed. The frequency of sound is determined in the norm for a phoneme, selected from the group: "s", "ts" and "f", the frequency of the same sound for the patient before prosthetics, the frequency of the same sound after prosthetics. After prosthetics the phonetic rehabilitation index (FRI) is calculated by the mathematical formula. If FRI is larger than one, successful phonetic adaptation of the patient to dental prosthesis by the phoneme is determined.
EFFECT: method makes it possible to increase the accuracy of estimating the quality of performed dental intervention, and correction.
3 dwg, 1 ex
SUBSTANCE: odontopreparation is followed by impression taking. A dental model is injected into cast. Anatomic forms of retainer teeth is restored in wax, and an intermediate part of the prosthesis is modelled. The cast model is imprinted in silicone. The teeth are prepared. A reinforcing fibre tape is prepared. A segment of fibre tape impregnated with universal adhesive is placed on the teeth along the full length taking into account a profile of the masticatory surface up to an equator. The prepared segment is fixed on the teeth with the universal adhesive by polymerisation in halogen light. Self-hardening plastic is placed into the silicon impression to be inserted into the oral cavity. After the plastic is self-polymerised, the impression together with the denture is removed from the oral cavity. The denture is removed from the impression and polymerised additionally within its intermediate portion.
EFFECT: by reinforcing the denture with the fixed reinforcing fibre tape, the method enables increasing durability of the temporary denture, making the temporary denture at one visit and maintaining its aesthetic properties.
1 dwg, 2 ex
SUBSTANCE: invention refers to medicine, particularly to dentistry, and can be used in orthopaedic dentistry for oncologic patients. A removable resection upper jaw denture with a myogymnastic element comprises an immobilising and resection portions and a removable myogymnastic element. The immobilising portion is configured in the form of a fixing plate having a clasp fixation system on the rest teeth. The resection portion is provided with artificial plastic teeth, contacts directly the rest upper jaw tissues and form a prosthetic bed for a permanent denture. The myogymnastic element is configured in the form of an orthodontic wire individually curved for each patient and having various cross-sections with a bead of a variable diameter sliding along the orthodontic wire. Plastic deposits are made in a base in attachment points of the myogymnastic element. The orthodontic wire is fixed by tension into blind canals.
EFFECT: invention enables combining the dental prosthetics and correction of postoperative tongue dysfunction in the oncologic patients.
SUBSTANCE: group of inventions refers to medicine, is applicable in dentistry and involves a method for preparing a dental instrument, the dental instrument configured to be used by a dentist, a set of pads to be used by the dentist (versions) and a method for the tooth preparation for treatment (versions). A method for making the dental instrument comprising the pad and configured to be used by the dentist; the instrument has at least one dental cutting instrument used for the tooth structure extraction, involves the stages: detecting the pad sized after the above tooth and after at least a portion of an adjacent tooth; modelling the pre-detected horizontal, vertical and inclined motions, which are supposed to be repeated by at least one dental cutting instrument to extract at least a portion of the detected portion of the tooth to be extracted; detecting the first and second guide edges inside the pad; making the above detected pad with the above first and second guide edges. The above first guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The second guide edge inside the pad is remote from the first guide edge at a distance d. The second guide edge corresponds to the above pre-detected horizontal, vertical and inclined motions. The first and second guide edges are thereby presented to contact the dental cutting instrument to direct its horizontal, vertical and inclined motions in accordance with the pre-detected horizontal, vertical and inclined motions to remove at least the above portion of the pre-detected portion of the tooth to be extracted.
EFFECT: group of inventions enables providing the accurate tooth treatment for the following stage of treatment both by experienced and inexperienced dentists.
21 cl, 8 dwg
SUBSTANCE: invention refers to medicine and is applicable in treating lower molars with destruction in root bifurcation. Laboratory and radiographic examinations of an involved tooth are performed. A crown-radicular separation is followed by introducing an osteotropic material. Residual dental stumps are prepared for whole-piece crowns. A working impression of the lower jaw and an auxiliary impression of the upper jaw are made. The whole-piece crown with a washing space surrounding the separated bifurcation is made. It is fixed on dental cement.
EFFECT: method ensures the integrated treatment involving surgical and orthopaedic interventions and enables preserving the dental functions and restoring its anatomical shape.
FIELD: medical engineering.
SUBSTANCE: method involves producing an opening of diameter reaching 2 mm with diamond or hard alloy bore in adhesive cover after preparing abutment tooth and prosthesis or widening already available perforation also to diameter of 2 mm. The prosthesis is set on the abutment tooth and place is marked for creating and directing pin-canal in the area of cutting one-third of the frontal abutment tooth or in the lateral abutment tooth equator area. The pin-canal direction is to correspond to path for introducing the prosthesis. The pin is screwed-in with screwdriver and holder to a depth of about 2 mm into dentin. The prosthesis is set on the abutment for making control. The pin is filed-off to adhesive cover layer after having fixed the prosthesis on composition cement.
EFFECT: prolonged service life; high functional value.
FIELD: medical engineering.
SUBSTANCE: method involves taking anatomical imprint from jaw under prosthetic repair, casting supergypsum model for carrying out parallelometric studies, model duplication, modeling future clasp carcass skeleton from wax, enclosing the wax model into cell filled with gypsum, evaporating wax and filling the arisen cavity with polymer. The clasp carcass model is reproduced as metal one from polymer model for all models taken in production. Polymer for manufacturing clasp carcass model is reactive composition hardening at room temperature and composed of two ingredients taken in 2:1 proportion by weight. The first ingredient portion is based on polymethyl methacrylate, and the second one is polymethyl methacrylate with dimethylaniline added in the amount of 1-2% by mass.
EFFECT: significantly accelerated carcass manufacturing process; high accuracy in reproducing sizes; improved connection of locks and telescopic crowns to polymer carcass; low production costs.
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.
EFFECT: enhanced effectiveness of treatment.
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.
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.
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.
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.
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.