Silicone composition for forming a lining layer basis removable dentures
(57) Abstract:The invention relates to prosthetic dentistry. Silicone composition for forming a lining layer basis removable dentures contains silicone rubber, metal oxides, pigment, catalyst, glass microspheres, a polydimethylsiloxane, a surfactant, glycerine or polyoxymethylenes, the components are taken in certain proportions. The composition has a high adhesion, moisture resistance, strength properties, which ensures a long time use in the oral cavity. The invention relates to silicone compositions used in prosthetic dentistry, in particular, for the formation of the elastic lining layer in the manufacture of dentures.Known composition based on silicone rubber, containing in wt.% polydimethylsiloxane rubber 62,7-78,45, chelate compounds of aluminum and titanium 2-7,84, diethylaminoethylmethacrylate 3-4,35, a mixture of modified Aerosil with zinc oxide 16,549-25,1, pigments 0,01-0,02 (and.with. The USSR 427706, 1975, MKI A 61 C 9/00).In the Federal Republic of Germany patent 4328248, 1995, MCI A 61 C 13/01 mentioned elastic material based on silikonovye lining material to the base is achieved by external pressure. The composition of the material (composition using silicone rubber) is not specified.Protected in the first invention, the composition is adopted by us for the prototype allows to obtain the elastic lining material, which, however, has a limited period of use in the oral cavity due to insufficient water resistance and adhesion. In the second invention, the formation of the elastic lining material is complicated: it requires special equipment.The task of the invention is to provide a composition for forming lining with high strength and adhesion to prosthetic base.As a result of scientific-experimental studies we have developed a silicone cold cured composition containing the ingredients in the following amounts, wt.%:
Silicone rubber (M m 40000-60000) - 46,57 - 48,65
The aluminum hydroxide was 4.76 - 4,86
Alumina - 0,946 - at 1,047
The silicon oxide - 8,64 - 8,9
The modified silica - 3,742 - 4,545
Surfactant (glycerol, polyoxyethylenesorbitan) - 5,68 - 6,88
Glass microspheres - 5,12 - 5,47
The polydimethylsiloxane - of 14.46 - 14,49
Dibutyltin tin - 1,57 - 1,83
Gamma aminopropyltriethoxysilane - 1,4 -1,49
Eilsel>The composition proposed for the formation of the elastic lining layer on the basis of dentures, it has high adhesion, moisture resistance, optimum strength properties, which ensures a long time use in the oral cavity.The results of preliminary clinical trials of the material obtained on the basis of the proposed composition, meet regulatory requirements, determining the possibility of its application in prosthetic dentistry, namely as an underlayment for the basis of the combined plate dentures. Material longstanding high performance adhesive strength after soaking in water for 32 days adhesive strength is maintained at the level of 1.9 kg/cm, a water absorption of from 0.1 to 0.3%, the adhesive strength under shear - 11,9 kg/cm2.Tests conducted by the Department of faculty of prosthetic dentistry the University for compliance with ISO 10139-1; 10993; 7405.The preparation of the composition described in the following examples.Example 1
In a mechanical mortar making silicone rubber (M m 40000) in an amount of 65 m H., aluminum hydroxide - 6,5 m H., silicon oxide is 11.9 m H., modificirovannaya within half an hour and the mixture is discharged into the tank. Then prepare a mixture of the following components: oligomerisation - 77,3 m H., alumina - 5,65 m H.-modified silica - 11,35 m H., microspheres - 5,63 m H. that mix there within half an hour, and the mixture is discharged from the stupa. Then to 20 m H. prepared mixture is added a catalyst consisting of 1,05 m h dibutyltindilaurate tin, 2,1 m H. ethyl silicate, 0,94 m H. gamma aminopropyltriethoxysilane and 0.9 m CH VINYLTRIMETHOXYSILANE.The resulting composition is administered in mixture I in the amount of 80 m H., mix until a homogeneous mass within 2-3 minutes.The composition is prepared for forming the lining of silicone material on the hard acrylic base denture. Curing of the lining occurs in the oral cavity of the patient.Properties composition: specific tensile strength =12.0 kg/cm2, elongation L=120%, the curing time of the composition in the oral cavity of the patient 34 minutesExample 2
In a mechanical mortar is stirred for half an hour silicone rubber (M m 60000) in an amount of 65 m H., silicon oxide is 11.9 m H., polyoxyethylenesorbitan (SAS) - 7,6 m H.-modified silica - 2,18 m H. , aluminum hydroxide - 6,5 m H., glass, Mick is capacity. Then prepare a mixture II comprising oligomerisation - 77,8 m H., a modified silicon oxide - 13,65 m H., alumina - 5,11 m H., glass microspheres - 5,4 m H. Components is stirred for half an hour and unloaded from the stupa. To 20 g of this mixture II add dibutyltindilaurate tin - 1,05 m H., gamma-aminopropyltriethoxysilane - 0,94 m H., ethyl silicate - 2,1 m H., propyltrimethoxysilane - 0,9 m H. the resulting homogeneous composition is added to 80 g of a mixture of I. the Composition is stirred for 2 to 3 minutes to obtain a homogeneous mass. The product is ready for use as a lining material for the hard base of the dental prosthesis.Properties composition: =12.5 kg/cm2L=130%, the curing time in the oral cavity 45 minutes.Example 3
The mixture of components produced in a mechanical mortar that make silicone rubber (M m 40000) in an amount of 62.5 m H., silicon oxide and 11.6 m H. , polyoxyethylenesorbitan (SAS) - 9,2 m H.-modified silica - 6,1 m H., aluminum hydroxide is 6.4 m H., glass microspheres - 7,35 m H., iron trioxide - 0.2 m h Components is stirred for 40 minutes, the mixture I unload.There is prepared a mixture II comprising oligomerisation - 77,8 m H., modified the s 35 minutes and the mixture II unload. To 20 m H. this mixture add dibutyltindilaurate tin - 1,05 m H., ethyl silicate - 2,1 m H., gamma-aminopropyltriethoxysilane - 0,94 m H., VINYLTRIMETHOXYSILANE - 0,9 m H. the resulting mixture is stirred with 80 m h mixture I for 2 - 3 minutes until a homogeneous mass.The composition is ready for use as a lining material for hard acrylic base denture. Curing of the composition occurs in the mouth for 3 to 4 minutesProperties composition: =13.5 kg/cm2L=130%, the curing time in the mouth - 34 minutesExample 4
The mixture of components produced in the course of half an hour in a mechanical mortar that make silicone rubber (M m 60000) in an amount of 62.5 m H., silicon oxide and 11.6 m H.-modified silica - 6,1 m H., aluminum hydroxide is 6.4 m H., glass microspheres - 7,35 m H. trioxide iron of 0.4 m H. the mixture I is stirred for 30 minutes and discharged into the tank. There is prepared a mixture II comprising oligomerisation - 77,3 m H., a modified silicon oxide - 11,35 m H., alumina - 5,65 m H., glass microspheres - 5,63 m H. Components is stirred for half an hour and discharged into the tank.Then to 20 m H. this mixture II add dibutyltin is 0,9 m including the resulting composition is mixed with 80 m h mixture I in 2-3 minutes until smooth.The composition is ready for use as a lining material. Curing of the composition occurs in the mouth for 3-4 minutesProperties composition: =12.0 kg/cm2L=135%, the curing time in the mouth 3-4 minutes Silicone composition for forming the elastic lining layer basis removable dentures, including polyacrylate - polydimethylsiloxane rubber, metal oxide - modified silicon oxide, pigment, catalyst, characterized in that it further comprises a polydimethylsiloxane, glass microspheres, surfactant-glycerine or polyoxymethylenes, as the metal oxide further comprises silicon oxide, aluminum oxide and aluminum hydroxide, and a catalyst for use dibutyltindilaurate tin, ethyl silicate, gamma aminopropyltriethoxysilane and alkenylsilanes at the following content, wt.%:
Polydimethylsiloxane rubber - 46,57-48,65
The polydimethylsiloxane - of 14.46-14,49
The modified silica - 3,7-4,545
The silicon oxide - 8,64-8,9
Alumina - 0,94-at 1,047
Dibutyltindilaurate tin - 1,57-1,83
Ethyl silicate - 2,89-3,14
Gamma aminopropyltriethoxysilane - 1,4-1,49
Alkenylsilanes - 1,16-1,35 t
SUBSTANCE: method involves using obturating prosthesis having basic and auxiliary surface connected to each other with additional anterior, posterior and two lateral vertically arranged surfaces forming a cavity. The anterior and posterior vertically arranged surfaces have slot-like recesses. Reference notch marks are produced on the auxiliary surface near nose. The alveolar process is manufactured as base and wall. Reference notch marks are produced on the base. Wall has holes for making process lightweight. Teeth are set on the wall.
EFFECT: simplified prosthesis design.
6 cl, 3 dwg
SUBSTANCE: method involves basic and auxiliary horizontally arranged surfaces joined by means of additional frontal, back and two lateral vertically arranged surfaces with a plane being formed. The frontal and back vertically arranged surfaces have recesses as retention grooves. Reference notches are made in the nose area on auxiliary surface. The alveolar process is manufactured base and wall. The base has reference notches. The wall has openings for reducing process weight. Teeth are mounted on the wall. Three openings arranged as triangle which base is turned towards pharynx are produced in auxiliary surface of the obturator prosthesis. Metal containers having matrices pressed into them are introduced into the openings. Three openings arranged as triangle which base is turned towards pharynx are produced on the base bottom. Pedicles (flow gates) having retention notches are mounted in the openings. Each flow gate ends in patrix engageable with corresponding matrix.
EFFECT: simplified and reliable method for fixing alveolar process.
3 cl, 3 dwg
FIELD: medical engineering.
SUBSTANCE: device has partial removable palatine plate prosthesis bearing artificial temporary. The palatine plate has an anterior and two lateral segments connected to each other by means of screw in the anterior palatine fornix region allowing autonomous displacement. Cramp iron members are set on the fangs and on the boundary separating the anterior and lateral segments and on the second temporary molars. Shield for moving upper lip aside is placed in the area of dental arch defect along alveolar process with anterior segment. The shield forms slit between shield surface and gingiva. The shield is stretched to contact point of fang to the first permanent molar. Shield edge is made oval and congruent to transit fold contour.
EFFECT: cosmetically full-valued substitution of upper dental arch defect.
FIELD: medical engineering.
SUBSTANCE: method involves producing maxillary defect imprint, manufacturing its plaster model and modeling wax pattern of obturator prosthesis. The model is compressed with single basis wax layer. Recess is formed on the palatine part corresponding to defect shape. The basis and wax copy of artificial alveolar process is modeled and teeth setting is carried out. Plate is produced from basis wax as a cover closing the recess formed on the palatine part. The cover models the palatine fornix in which a hole of 10-15 mm large diameter is produced. The plate is fixed with wax on defect edges. The so modeled hollow obturator prosthesis is plastered into cuvette composed of two parts - bottom and cover. Model with obturator prosthesis in vertical position is plastered into lower cuvette part. Upper cuvette part is set and filled with liquid gypsum on vibrating table. Gypsum flows inside of obturator through an opening in palatine part. Metal wire loop is introduced into the obturator through an opening in wax plate. Wire diameter is 1.0-1.5 mm as large. The cuvette is hold to achieve full hardening of gypsum. The cuvette is opened after removing wax by applying evaporation method. Obturator model and upper cuvette part are filled with dough-like plastic. Both parts of the cuvette is joined and pressed in vertical direction using bench press. The plastic is polymerized. The prosthesis is removed from the cuvette. Gypsum and reinforcing wire are removed from the cuvette through the palatine part opening. The opening is closed with self-hardening plastic. The prosthesis is filed and polished and fitted in the oral cavity.
EFFECT: improved strength properties; exact correspondence to prosthesis bed.
SUBSTANCE: method involves manufacturing silicon cliché stensil for reproducing morphologic pattern of palatine surface of removable maxillary plate prosthesis base and individual pattern of transverse palatine sulci. The cliché stensil is a fragment of adjusted double anatomical maxilla impression with imprint of individual pattern of transverse palatine sulci. To do it, adjusted double anatomical maxilla imprint is to be produced using imprint silicone mass. After having produced the impression, palatine surface fragment is cut out from it. Wax is heated on oral side at the laboratory stage for manufacturing removable plate prosthesis when modeling removable final wax reproduction of maxillary plate prosthesis base; and the palatine surface is printed by means of earlier produced cliché stensil.
EFFECT: high accuracy in reproducing of individual palatine sulci pattern; full-valued rehabilitation of patients with partially or completely failing teeth.
FIELD: orthopedic stomatology.
SUBSTANCE: method of forming elastic silicone substrate on rigid plastic basis consists in that mechanically and chemically treated surface of rigid basis adjusting to prosthetic bed is moistened with monomer being a member of basis plastic composition, dried, and coated with adhesive primer. After 1 min pause, basis is introduced for 3-4 min into microwave field emitted by source with power 450-600 W. After microwave treatment, surface is coated by cold-cured elastomer and substrate layer is then formed in mouth cavity. Adhesive strength of layer is thus increased by more than 1.5-2 times when compared to conventional method.
EFFECT: increased strength of bond between soft substrate and rigid plastic basis, and prolonged service time of denture.
1 tbl, 3 ex
FIELD: medicine; orthopedics.
SUBSTANCE: compound-jam post-resection denture can be used for making compound-jam prosthetic appliances for patients having wide defects of tissues of jam-face area. Denture is made in form of removable construction which has fixing, substituting and hollow sealing parts. Groove is made additionally in denture which groove locates onto top surface of sealing part. There is also channel passing through denture which has input being made inside the groove. Output of channel is disposed between second pre-molar and first pre-molar inside interior to provide muscular retention of denture. Bottom of the groove is made to have inclination to input of channel.
EFFECT: possibility of self-release of liquid stored onto top part of sealing part of denture.
SUBSTANCE: method involves is fulfilled in two stages. Collapsible structure of temporary combined gnathic prosthesis is manufactured at the first stage during the first two months. The prosthesis has two obturating parts having surfaces congruent to defect cavity manufactured from flexible plastic and removable full laminar dental prosthesis having locking thrusting member manufactured by means of transfer molding. The second stage involves manufacturing permanent one-piece removable combined gnathic prosthesis using transfer molding method after holding during 5-6 months to eliminate muscle contracture and form prosthesis bed. The prosthesis has hollow obturating part and full removable laminar dental prosthesis.
EFFECT: simplified production process; early stage cancer patient rehabilitation in half-maxilla resection cases.
SUBSTANCE: method involves covering dental structures or prostheses with ribbon manufactured from fibers and coating it with filling material layer. The ribbon is manufactured from fluorine-containing copolymer monofiber of circular cross-section woven as ribbon as it is shown on dwg 1.
EFFECT: provided dental structure balanced life when splinting and high adhesion degree of prosthesis to filling material.
FIELD: medical engineering.
SUBSTANCE: device has double layer base and artificial teeth. Base layer, facing prosthesis bed having external edges positioned in active movable part of mucous membrane in making engagement to transition vault fold enveloping upper lip frenulum and buccal folds with closing valve being formed, is manufactured from superelastic titanium nickelide. The base layer compensating alveolar process bone tissue atrophy is manufactured from acrylic plastic.
EFFECT: accelerated adaptation period; improved strength characteristics.
FIELD: medicine; medical engineering.
SUBSTANCE: composition has polydimethylvinyl siloxane rubber, filler, silica hydride and platinum catalyst. 3-[(2-oxypropyl methacrylate)aminopropyl]-triethyl silicoformate and stain are optionally included. The ingredients are taken in known proportions. The prosthesis has acryl base and underlying layer under the base produced from the said composition. The composition allows producing underlying layers of high adhesion to prosthesis base.
EFFECT: improved service characteristics.
2 cl, 2 tbl