Removable artificial denture

FIELD: medicine.

SUBSTANCE: device has base manufactured from dental superelastic casting titanium nickelide having denture clasp on bearing teeth and saddle-shaped segments in failing teeth zones produced as plates. The artificial denture is attached to the plates with flexible polymer ligaments. The saddle-shaped segments are manufactured as meander row attached to base body via middle portions of end plates in the row. Polymer ligament flexibility is higher than meander row plate waves flexibility.

EFFECT: reduced risk of abnormal underlying tissue changes.

4 dwg

 

The invention relates to medicine, specifically to the technique of dental prosthetics.

In modern removable dental prostheses are distinguished: 1) basis - the main (carrier) part of the prosthesis; 2) a saddle-site basis; 3) devices for fixation of the device - klammern system; 4) artificial teeth attached to the base on the saddle-shaped sections [Vinkopan and other Prosthetic dentistry. The tutorial. M: Medicine. 1988. S].

The main performance criteria of dentures, replacing single missing teeth or their ranks (edentulous), are: the degree of their influence on parentline tissue, the degree of retention and stabilization of the prosthesis, the efficiency of recovery of chewing and speech functions, saving taste, tactile and thermal sensations, aesthetics.

About the need for careful adjustment of all components of the prosthesis shown, for example, the fact that the average number of occlusal movements of the mandible person per day equal to 3000. The inadequacy of the design, the inaccuracy of manufacturing lead to injuries and inflammation of the periodontium, capillary hyperplasia, Hyper - and parameters, galvanize and several other diseases, reduces to zero the effect of prosthesis.

At the present time basis, which is the combined support dentures, worked well enough blah is odara achievements foundry and materials science. Thus, improving technical and consumer characteristics of the prosthesis is accomplished by improving the saddle sections.

One of the main conditions for the design of new prostheses and individual adjustment of the prosthesis under the specific scheme of edentulous - providing moderate and possibly more evenly distributed dynamic pressure on the underlying tissues to maintain a balance of functions and reactions. For example, in the absence of the second, balancing, bearing on the remaining teeth using prostheses with Svobodnoye seated. The cantilever arrangement of the prosthesis (figure 1) leads to non-uniformity of the masticatory load on the supporting tissue along the length of the prosthesis. The lowest pressure will experience the mucous membrane of the alveolar crest around the abutment tooth (TS in figure 1), the largest - at the end of the ridge (TA). A so-called "problem of the end of the saddle". In addition, the cantilever arrangement of the saddle-shaped portion relative to the base, i.e. the presence of transverse consolidate, leads to the transverse non-uniformity of pressure on the mucous membrane of the alveolar ridge. The negative consequences of exceeding a physiologically acceptable norms specific pressure aggravate the General difficulties of this type of dental prosthesis.

As the material bases of dentures use the Ute porcelain, rubber, at a later time - acrylic plastic, and more recently - metals. Metal base alloys with low shrinkage has been applied in connection with the achievements of foundry technology.

Known removable denture for the upper jaw [Aserbekov and other Prosthetic dentistry. IFC "Folio". Saint-Petersburg. 1998. S]. In it the basis has an extensive bearing surface due to the presence of palatal bars 2 (figure 2). The entire device is molded from an inert metal technology dimensionally stable castings. The base device has no organized means of preventing mentioned local overloads supporting tissues, because of its longitudinal rigidity contributes to the action of the law of the lever (figure 1).

The task of improving the uniformity of loading to some extent solved in the known removable prosthesis that uses elastic pad under the saddle [Gpeni. Clasp dentures. M: Science and technology. 1981. P.140-141]. To provide differential mobility dentitions such a prosthesis is fixed on the abutment teeth moving braces - clasps, attachments. However, despite the measures taken, these bases are insufficient adaptive and therefore, in clinical practice, little used.

Known denture [patent PCT international application No. 82/02828, publ. 09.02.82, No. 21]. At the heart of his base wicker, megola is but laid the net, sintered in vacuum and filled with resin. Elastic flexible basis helps to reduce the heterogeneity of the specific load on the mucous prosthetic bed. The disadvantage of the prosthesis remains a lack of uniformity.

Another solved the problem in the other known removable dental prosthesis [Biocompatible materials with shape memory and new technology in dentistry. Edited Vaikunthera. Tomsk. IPF. Ed. NTL. 2003. S-104], which uses progressive material of medical technology - a super-elastic alloy nickelide titanium designed for foundry dental equipment [RF patent №2162667]. By the greatest similarity of this analogue is selected as a prototype. Saddle-shaped sections of basis is made in the form of a series of curved plates of sheet titanium nickelide, comb attached to the body base (figure 3). On each plate is a spherical protrusion, on which with the touch of neighbors fortified artificial tooth. The entire tooth row on podsolnechnom level and saddle area basis hermetically covered (sealed) elastic polymeric biocompatible material. In this case, the artificial teeth are Autonomous. When selected lower voltage elastic deformation of the polymer than alloy, micromotion of each tooth is determined by the elastic properties of the alloy. Thanks Afton is mesti teeth sharply reduced "lever" effect, chewing pressure is considered the reference tissue more uniformly.

The disadvantages of the prototype due to the asymmetry of the places of attachment of the plates to the base. During the chewing load cantilever type mounting plates leads to the action of the law of the lever of the second kind. Bending when loading plates are pressed with greater force to be under their free ends tissue prosthetic bed, and the whole frame viviewer abutment tooth (teeth) in the transverse direction. Inhomogeneous distribution of masticatory loading in the longitudinal direction, since the area of the base is attached to plate his saddle-shaped section defines a longitudinal stiffness of the lever and the behavior of the whole complex.

The technical result of the invention is improving the uniformity of distribution of the masticatory load on the tissue prosthetic bed.

This technical result is achieved in that in a removable dental prosthesis that contains the basis of the super-elastic foundry dental titanium nickelide with clasps on the abutment teeth and saddle areas in the area of the missing teeth, each in the form of a series of parallel spaced plates, artificial teeth that are attached to the plates and half-covered with plates of elastic polymer bundle, plate saddle-shaped sections connected between the other in a row along the outline of the meander, with each row of plates attached to the basis of local areas, vistasony from the middle of the last in the series of plates.

For uniform distribution of the chewing load is necessary: first, the Autonomous mobility of each artificial tooth and adaptability of occlusion along the tooth row, second, symmetrical and preferably a minimum richiesti suspension frame in the transverse direction.

The first proposed solution is achieved discrete (plate) form the structure of the saddle-shaped part of the base, the second meander, i.e. axisymmetric system link the individual plates (4, figure 4) between them. When the location of the attachment points of all saddle-shaped area to the base at its edges and along the symmetry axis (7 4) the equality of the pressure of chewing load with oral and lingual sides of the alveolar ridge.

Thus, the specified technical result is achieved by the combined use of distinctive signs, and performance - all the essential features of the object.

The drawings show:

figure 1 - diagram of the load removable denture with one fixed bearing;

figure 2 - cast base denture. 1 - saddle-parts basis, 2 - connecting arc, 3 - fixing clasps;

figure 3 is a removable dental prosthesis (prototype): 4 - layer which are saddle-shaped area basis, 5 - the Palatine area basis, 6 - hole;

4 is an external view of the proposed denture: 7 - areas of attachment of number plates to the base 8 to the axis of symmetry of the saddle-shaped part of the base, 9 - polymer elastic placeholder.

Achievable technical result is confirmed by specific examples of clinical use of the invention with prosthetic teeth in the clinic of dental implantology medical engineering center (Tomsk).

Example:

Patient I., 67 years old. Diagnosis - edentulous teeth of the upper jaw 1, 6 and 7 are symmetrically left and right. Under the scheme, and the condition of the preserved teeth, the degree of atrophy of the alveolar crest and the severity of the arch of the hard palate patient is shown and was used in the last 5 years removable prosthesis.

The transition of a patient on the use of the prosthesis that design was a favorable factor for the correctness of a subjective evaluation of the quality of the prosthesis.

Manufactured by the technology of the exact shape casting of an alloy of Nickel-titanium (his casting choices) prosthesis has the following technical characteristics (figure 4): the scheme replaced the teeth 1, 6, 7 symmetrically left and right. The Palatine area basis, cast on prints has an average thickness of 1 mm. To save tactile and gustatory sensitivity in the middle part of the segment you elnino hole 6.

Saddle-shaped sections contain each four-wave meander a number of plates (4), attached to the middle (7) extreme in a series of plates to the body base. With the oral side to the first and third waves in the distal direction, the number of attached plastic teeth. The prostheses of the first teeth (incisors), as in the prototype, attached to the base tightly. Teeth-dentures and peripheral portions of the base covered (filled) rubber-like plastic (Alloplast), the elasticity of which is higher than the elasticity of waves meander patterns of number plates.

From the anamnesis of the patient, it follows that in comparison with the prototype of the subjective feelings of shares chewing more comfortable and closer on this indicator to the natural teeth, i.e. the absence of discomfort.

Analysis of the results from the testing of the present invention confirms the reachability of the technical result as a consequence ensure the Autonomous and axisymmetric mobility artificial dental prosthesis.

Experience in production of existing dentures, the availability of the required technology in the experience with alloy Nickel-titanium demonstrate compliance of the proposals with the criterion of "industrial applicability".

Removable dental prosthesis that contains the basis of the foundry dental super-elastic Nickel-titanium with clasps on the support Subie saddle-shaped sections in the area of the missing teeth, made in the form of plates, artificial teeth that are attached to the plates elastic polymer bonded, characterized in that the saddle plate sections made in the form of a meander line, attached by means extreme in a series of plates to the body of the base and the elasticity of the polymer binders exceeds the elastic waves meander of number plates.



 

Same patents:

FIELD: medical engineering.

SUBSTANCE: device has base bearing artificial teeth, clasp and cramp iron members joined to bases provided with flexible envelope. The flexible envelope, rotatable when taking off or setting prosthesis, is fastened to cramp iron member and fixed in longitudinal direction by means of thickenings on cramp iron hook tips which sizes are not greater than external diameters of flexible envelope or internal flexible envelope surface prominence and counterpart grooves on the cramp iron members.

EFFECT: excluded anchorage teeth loosening.

The invention relates to medicine, namely to prosthetic dentistry and can be used for fixing clasp dentures

The invention relates to medicine, in particular to the dentist, can be used for fixation of removable prosthesis on the implant

FIELD: medical engineering.

SUBSTANCE: device has base bearing artificial teeth, clasp and cramp iron members joined to bases provided with flexible envelope. The flexible envelope, rotatable when taking off or setting prosthesis, is fastened to cramp iron member and fixed in longitudinal direction by means of thickenings on cramp iron hook tips which sizes are not greater than external diameters of flexible envelope or internal flexible envelope surface prominence and counterpart grooves on the cramp iron members.

EFFECT: excluded anchorage teeth loosening.

FIELD: medicine.

SUBSTANCE: device has base manufactured from dental superelastic casting titanium nickelide having denture clasp on bearing teeth and saddle-shaped segments in failing teeth zones produced as plates. The artificial denture is attached to the plates with flexible polymer ligaments. The saddle-shaped segments are manufactured as meander row attached to base body via middle portions of end plates in the row. Polymer ligament flexibility is higher than meander row plate waves flexibility.

EFFECT: reduced risk of abnormal underlying tissue changes.

4 dwg

Dental lock fixture // 2326623

FIELD: medicine; stomatology.

SUBSTANCE: dental lock fixture consists of cylindrical case and entering shutoff rod. Rod is made of fixing metal and is furnished with support arm and oval-shaped concave running end. Pressed rod body contains spring rested on curled area in case. Fixture is nonseparable. Outside surface of case if furnished with retention thread.

EFFECT: long-term reliability and serviceability.

1 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of medicine, namely to orthopedic dentistry and can be used in manufacturing of clasp telescopic prostheses with additional lock fastening. Method of manufacturing of additional lock fastening for clasp telescopic prosthesis includes several stages. At the stage of modelling wax reproduction of internal telescopic crowns on their distal surfaces performed is installation of additional lock fastenings in form of industrial workpieces of attachment with preservation of diametrical location of support teeth. Casting from metal of internal telescopic crowns with spherical projections is carried out. Fixation of medium rigidity matrices is performed on spherical projection of internal telescopic crown, model is prepared for process of duplication with isolation of clearance between lower matrix surface and mucosa of prosthesis bed. Wax modelling of framework of clasp telescopic prosthesis with external telescopic crowns on fireproof model is carried out. After casting framework of clasp prosthesis by traditional method, inside framework of detachable part of clasp prosthesis socket for installation of matrices under spherical projection is formed. After casting framework of clasp prosthesis by traditional method, fitting of metal construction without matrices is performed.

EFFECT: increased quality of prosthetics due to application of additional lock fastening, with possibility of its re-activation and ensuring prolongation of prosthesis service terms, without essential change of traditional process of manufacturing of telescopic clasp prostheses.

6 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to orthopaedic dentistry, and can be used for partial laminar and clasp prostheses. A clasp system for fixing a removable partial denture of a single tooth consists of a basis with artificial teeth and a denture clasp. One end of the clasp comprises a mechanical device consisting of an inner O-ring abutment and an outer matrix and configured as a pivot, while the other end comprises a clasp seat in a rigid socket on an artificial dental crown. The outer matrix is fixed in the prosthesis basis and detachable together with the prosthesis, while the inner O-ring abutment is ball-shaped and connected to a clasp arm. The seat of the clasp socket is mounted on the artificial dental crown vertically or horizontally either from the lingual, or palatal, or approximal surface.

EFFECT: invention enables providing a more stable fixation of the detachable clasp system, a masticatory effectiveness and an appearance, and also avoiding the negative effect on the parodontium.

3 cl, 12 dwg, 3 ex

FIELD: medicine.

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EFFECT: invention enables making the simple denture-fixing attachment with minimum number of sequentially connected members, providing the possibility of fixing of several fixtures, arranged in parallel to each other.

9 cl, 7 dwg

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