Jaw obturator prosthesis
SUBSTANCE: invention refers to medicine, particularly to dentistry, and can be used for orthopaedic rehabilitation of the patients suffering postoperative upper jaw defects. A jaw obturator prosthesis comprises a rigid polyurethane basis with prosthetic teeth configured to fit a mucous membrane of the preserved hard palate tightly, and a hollow obturator configured in the form of a soft polyurethane frame within a junction of a scar ring and bearing a thin polished rigid polyurethane lid. The frame and lid are coupled by a mechanical retention of mushroom holes formed on an end surface of the soft polyurethane frame, and congruent mushroom flanges formed on an end surface of the lid.
EFFECT: invention enables recovering the phonetics and provides the reliable fixation of the jaw prosthesis by reshaping the obturator and using the structural materials of various rigidities when making it.
The invention relates to medicine, in particular to the dentist, and can be used for prosthetic rehabilitation of patients with postoperative defects of the maxilla.
Known resection removable denture in the upper jaw (RF Patent 2183437 from 20.06.2000).
Known dental prosthesis (RF Patent No. 95504 from 10.07.2010).
Known maxillary prosthesis obturator, consisting of artificial teeth and a two layer base, made of nickeled-titanium alloy and acrylic plastics in the form of a hollow Cup-shaped design, the overlapping edges of the defect around the entire circumference, the depth of the flaw with floor areas pagnutti and anatomical sites of retention so that Lata is the material of the wall of the obturator blocked cheek scar heavy, had a maximum height, covering the preserved bone structure of the bottom of the defect and leaving open the projection of the nasal passages. While the mouth of the excretory duct of the parotid salivary glands do not overlap the basis of the prosthesis, providing free saliva in the oral cavity (A.A., Radicevic, VG Galonsky, V.T. Manchuk, WE Gunther. "Clinical case of a replacement prosthesis with complete maxillary post-resection defect". Siberian medical journal, 2009, No. 4).
Known dental prosthesis obturator having a basis with teeth and kamernyj fixation elements made of rigid polyurethane and the outer surface of the soft polyurethane, and the entire prosthesis is made by casting, including the sections forming the outer boundaries of the surgical field (RF Patent No. 2452431 from 10.06.12).
This maxillary prosthesis obturator selected for the prototype.
The present invention is to improve the quality of life of patients with postoperative defects of the upper jaw by improving phonetics and fixing obtenerse part of the maxillary prosthesis in the cavity defect jaw.
The technical result of the invention is the recovery of phonetics and reliable fixation of maxillary prosthesis due to a change in shape of the obturator and the use of structural materials is aznoe rigidity in its manufacture.
The technical result is achieved due to the fact that maxillary prosthesis obturator containing the basis of hard polyurethane with artificial teeth made with the possibility snug fit to the mucosa saved the hard palate, and hollow obturator is made in the form of a frame made from soft polyurethane in the area of contact Andrey ring and placed it covers from thin polished hard polyurethane, while the frame and the cover are connected with each other in the process of casting by mechanical retention mushroom holes formed on the end surface of the armature of soft polyurethane, and congruent mushroom-shaped projections made at the end surface of the cover.
The thin roof of the obturator is made of hard polyurethane, mounted on soft ground, plays the role of the membrane, reflecting the sound, thereby restoring the phonetics of the patient.
The invention is illustrated by figure 1, where
1 - the basis of the prosthesis of hard polyurethane with artificial teeth
2 - skeleton of the obturator is made of soft polyurethane
3 - cover of the obturator from polished thin polyurethane.
Maxillary prosthesis obturator contains the basis of hard polyurethane with artificial teeth 1 made with the possibility tight fit to the mucosa of the stored TV is Gogo sky, and hollow obturator. Hollow obturator is made in the form of a frame 3 made of soft polyurethane in the area of contact Andrey ring and placed it covers 4 out of thin polished hard polyurethane. The frame and the cover are connected with each other in the process of casting by mechanical retention mushroom holes formed on the end surface of the armature of soft polyurethane, and congruent mushroom-shaped projections made at the end surface of the cover.
Maxillary prosthesis obturator is made as follows.
Get functional impressions of the prosthetic bed of the patient, which made working models. The produced models of dental wax to form the side walls of the frame of the obturator. On the end surface of the side walls of the wax model of the frame of the obturator perform blind holes mushroom shape standard periodontal probe, and replace the wax on a soft polyurethane by known techniques. Next on the end surface is made of a skeleton of the obturator place the heated plate of thin wax, which must fall within the above-mentioned holes, and shape of the wax cover of the obturator.
Simultaneously, the wax model base of the prosthesis and carry out the setting of the teeth. Next, replace the modelling wax hard on urethan casting method. The resulting prosthesis handle, grind, Polish and a pin is stuck into the patient's mouth.
Maxillary prosthesis obturator containing the basis of hard polyurethane with artificial teeth made with the possibility snug fit to the mucosa saved the hard palate, and hollow obturator is made in the form of a frame made from soft polyurethane in the area of contact Andrey ring and placed it covers from thin polished hard polyurethane, with frame and cover are interconnected by means of mechanical retention mushroom holes formed on the end surface of the armature of soft polyurethane, and congruent mushroom-shaped projections made at the end surface of the cover.
SUBSTANCE: invention refers to medicine, namely to dental orthopaedics, and aims at analysing the strength properties of temporary fixed dentures. A device for making identical experimental constructions of temporary fixed dentures consists of two mated rectangular box-shaped units and a stamp. The box-shaped units are made of a low-melting metal; an inner surface of each unit has a profile of a negative image of the construction of the temporary fixed denture longitudinally, and triangular saw cuts extending from occlusion surfaces of the negative image of each crown denture passing to the end surface of the box-shaped units. The inner surfaces of the box-shaped units have retention guides in the form of triangular spines on one unit and in the form of triangular recesses on the other one. Each of the end surfaces of the units projecting on the surface of abutment teeth has a profile of a positive image of prepared stumps. The stamp is made of a low-melting metal and has a profile of the positive image of the prepared stumps and prosthetic bed.
EFFECT: invention enables making the identical temporary dentures of various lengths made of various structural materials.
SUBSTANCE: space closure is staged: preparing two fibreglass pipes of a diameter of 1 mm having a length of a defect size. A ligature wire of a diameter of 0.250 mm is inserted into the fibreglass pipes. The fibreglass pipes are crossed over in the defect centre, and the ligature wire is hooked to form a figure of eight. Free ends of the ligature wire are fixed to dental brackets of abutment teeth. The fibreglass pipes are impregnated with a 5-Grade adhesive and polymerised with LED light. An individual artificial tooth is made of a photocomposite on the fibreglass pipes.
EFFECT: method enables providing higher quality of life in patients with bounded edentulous spaces, with partial primary and secondary adentia in the period of orthodontic treatment.
3 dwg, 2 ex
SUBSTANCE: invention refers to dentistry and is applicable for orthopaedic rehabilitation of patients with completely absent dentition. A removable denture consists of a basis made of a rigid polymer dental product with fixed false teeth, and an elastic part adjoining a prosthetic bed. Trough-shaped grooves 1 mm deep divergent radially from the centre and extending onto a vestibular surface of the denture within a transient fold into a right-angled chamfer along the perimeter of the denture are formed on the basis from an internal side facing the prosthetic bed.
EFFECT: invention provides the higher adhesion strength of the soft pad and the rigid carrier of the basis, its uniform distribution along the surface of the prosthetic bed, as well as a possibility of re-use of the denture if the physical-mechanical characteristics of the elastic part occurred to be disturbed.
SUBSTANCE: invention refers to veterinary science, namely to prosthodontic treatment, and is applicable in making removable nylon prosthesis for the upper front teeth, including high-crown ones, such as pointed teeth. Both jaws are impressed. Master moulds are cast of die stone. Working and additional models are placed into an occludator. A future prosthesis is delineated on the working model. A wax basis is made of a wax plate. A tooth is moulded in wax, mounted in a tray and placed in boiling water. The wax is extracted and replaced by acryl. After removing, the acryl tooth is processed and polished. A socket is drilled in a base of the acryl tooth. At least two through canals are drilled from the socket above a gingival level on a palatolateral and palatomedial tooth surface. A shallow notch is made a little above the socket bottom on the outside along the whole circular length with using a ball-shaped bur. The artificial tooth with retention canals and peripheral notch is aligned with a bite and mounted on the wax basis. After the tooth is arranged, an incisal-tooth-gingival rest is moulded. The model is prepared for casting in the tray, and the teeth that can be used as retention points are ground off. The model is cast in a lower portion of the tray. Before the upper portion of the tray is cast, a gate system is mould of wax. Both portions of the tray are coupled together and bolted up. Dental stone setting up is followed by unscrewing and placing in boiling water for 10 minutes. The tray is opened, residual wax is washed out with hot water, and mould and counter-mould surfaces are processed with a divisional polish. After the division polish dries, the tray portions are connected and screwed. The prepared tray is inserted into a heated injection machine, wherein nylon under pressure fills all the retention canals of the tooth extending in the cone bells, encloses and crimps the notch along the periphery. Further, the tray is removed from the injection machine. The tray is left at a room temperature for 20 minutes and then placed in cold water until cooled completely. After the tray is opened, the prosthesis is removed, cleaned from dental stone, processed and polished. The prosthesis is applied into an animal.
EFFECT: method enables making the removable nylon prosthesis of the upper front teeth in dogs, including high-crown teeth, such as pointed teeth by creating special retention canals and peripheral notches in the acryl tooth.
4 cl, 9 dwg
SUBSTANCE: rigid splint recording of the lower jaw position in relation to the upper jaw is prepared on a denture of one of the jaws. A surface of the recording splint is adjusted in relation to the denture surface of the other jaw. The patient is adapted to the optimum position of the jaws for at least two months to achieve a symmetrical position of heads of the maxillotemporal joints. The jaw casts are mounted in a regulated articulator with the use of an occlusion splint recording the jaw position to be thereafter removed, and a space for mounting prosthetic structures is formed. The optimum position of the heads of the maxillotemporal joints is determined by multispiral computed tomography findings, at least twice. For the first time - prior to the prosthodontic treatment, for the second time and further - upon completion of optimising the lower jaw position in relation to the upper jaw, and further - after the temporary fixation of the prosthetic structures in the patient's oral cavity.
EFFECT: method enables creating the optimum positions of the heads of the lower jaws in the maxillotemporal joints by using an occlusion splint as the maximum occlusion recorder.
4 cl, 1 ex, 10 dwg
SUBSTANCE: proposed alloy contains the following components in wt %: carbon - 0.36-0.55, silicon - 0.7-2.5, manganese- 0.25-1.00, chromium - 27.5-30.5, molybdenum - 3.5-6.0, tungsten - 0.55-1.55, boron - 0.03-0.10, nickel - not over 0.5 and iron - not over 0.3 Note here that total amount of molybdenum and tungsten does not exceed 4.5-7.0.
EFFECT: higher strength and lower melting point, sufficient linear expansion factor, antirust properties, machinability.
SUBSTANCE: milled occlusal template for the reproduction and formation of occlusal denture contacts in making single and/or crown fixed dentures by computed milling of an ash-free plastic pieces by optic impression immediately with wax dental reconstruction with the occlusal contacts. The occlusal contacts are modelled using an articulator including the occlusal relations of the centric and excentric contacts. A lower border of the milled occlusal template is specified at the level of an equator. An internal surface of the template matches with an occlusal surface of the wax teeth. The occlusal template consists of two equal halves coupled longitudinally to visualise and facilitate the restoration.
EFFECT: invention enables the accurate representation of the modelled occlusal dental surface to be reproduced in the dental restoration.
SUBSTANCE: invention refers to medicine, particularly to dentistry and applicable in making removable dentures, obturators and maxillofacial components. The method consists in the fact that depending on the quantitative content of gold and silver components, 99.99% or 75% pure gold or a gold alloy in the form of a foil, powder flocks of the thickness of 1 mcm (micrometre) to 8 mcm is taken; further a portion required for making a modified dental plate, an obturator or a maxillofacial prosthesis is separated on weight basis in the ratio of 300:1, wherein 300 is a weight part of acrylic plastic or silicone, while 1 is a weight part of gold and its alloys. Alternatively, the ratio can be varied with an increase or decrease of a portion of gold and its alloys in the modified acrylic or silicone material. Thereafter, the acrylic or silicone components are mixed thoroughly with the gold or alloy component, and mould into a prepared flask with a dental prosthesis, and polymerised by a traditional approach.
EFFECT: invention provides eliminating the patient's discomfort in the mouth cavity, reducing a microbial adhesion to the dental plate, as well as promotes the epithelisation of mucosal injuries of the prosthetic bed.
SUBSTANCE: invention relates to the field of medicine, namely, prosthetic dentistry, and is designed to protect the vestibule of the oral cavity and the dentitions for the period of training and competitions. Individual sports teeth splint is made of elastic plastic. The splint covers the superior jaw dentition, hard palate and the vestibular slope of the alveolar ridges. On the lower jaw to the height of contour, the splint overlaps only the side groups of teeth of the lower jaw. The front part of the splint is manufactured with a height of 2 mm - 4 mm shorter than the distance of the patient physiological rest.
EFFECT: invention enables to create conditions for mouth breathing and smooth taking of liquid by creating of respiratory clearance between the splint front part and the cutting edge of the front group of the teeth of the lower jaw.
SUBSTANCE: invention relates to dentistry and is intended for application in orthopedic and therapeutic dentistry. Gypsum models of patient's jaws are made. Biomechanics of lower patient's jaw movements is studied. Angles of sagittal and transversal joint paths of patient are determined. Obtained values are marked on scale of joint units of articulator, which imitates individual movements of patient's lower jaw. Gypsum models are placed in claimed apparatus and ceramic thin half-crowns are modelled on them under constant control of interaction of dentitions and articulation contacts, proper to patient. Preparation of teeth before application of prosthesis according to method includes grounding off sharp enamel crests and processing teeth surface by airbrasive machine with powder with size 50 mcm under pressure 20 atm until dull surface of enamel appears.
EFFECT: method makes it possible to reduce trauma and preserve viability of teeth with prosthetic appliance due to elimination of preparation of hard tissues of said teeth.
2 dwg, 1 ex
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.