A method of manufacturing a removable ceramic laminar dentures

 

(57) Abstract:

Usage: in medicine, namely in prosthetic dentistry. The inventive method is that made collapsible combined model, get cast popped unit-segment, made of refractory model of the ceramic material, thermal expansion coefficient of which is equal to the coefficient of thermal expansion of the porcelain mass, the model is subjected to heat treatment, put it in layers of porcelain mass and subsequent firing. The invention will improve the quality dentures and their biological indifference.

The invention relates to medicine, namely to prosthodontics.

A known method of manufacturing a removable laminar dentures, including the manufacture of prosthetic base and artificial teeth of plastics. The main disadvantage of this method is that it can make the dentures are made of plastic, which bistro abrasions (artificial teeth, basis), causes inflammation of the mucous membrane of prosthetic field, burning, discomfort to the patient.

A known method of manufacturing mevleviye wax and extractions, the injection prepared with plastic teeth at the base of the cuvette of contrastano for pressing the teeth and the base plastic in contrastin for pressing basis with subsequent polymerization of the plastic.

However, the known method does not allow to get dentures high quality as functionally and aesthetically. This is because the plastic teeth are made this way, in a short time (3-4 months) are erased, changed in color. The basis of the prosthesis, made of plastic, also used up during the first year of use does not conform to the boundaries of the prosthetic field. As a result, the prosthesis begins to balance during a meal. In the future, this mismatch does not lead to failure of the prosthesis.

Furthermore, the plastic material containing monomer, dyes, causes inflammation of the mucous membranes of the oral cavity. The patient is forced to abandon implants made this way because of intolerance to the plastic.

The technical result of the invention is to improve the quality and biological indifference of the prosthesis.

This is achieved in that in the method of manufacturing shemalegallery the cast is made of the auxiliary model. On the working cast is made collapsible combined (supergips + ordinary plaster) model. It pushed the entire block segment containing toothless alveolare process and restricting its natural teeth.

With this block, get cast "Snelston-21". In this cast put ceramic mass having a thermal expansion coefficient equal to the coefficient of thermal expansion of the porcelain mass. After solidification of the cast remove ceramic (refractory) model. Carry out the heat treatment model at a temperature of 500-550oC for 3-5 minutes

On cooled model is applied in layers of porcelain mass (base layer) "Sicor" forming from the base of the prosthesis and artificial teeth. After each deposited layer model is baked.

Receiving a frame of the prosthesis from the base layer thickness of 2-2 .5 mm, it is removed from the model and the pin is stuck in the block segment. Then, the working and auxiliary model map in the position of Central occlusion. Finally form the basis of the porcelain mass anatomic shape of the artificial teeth and the basis. Put the frame firing. The base layer of the porcelain mass is fired at a temperature of 960oC for the individual relief each artificial tooth, while adhering to the teeth-antagonists. Then the prosthesis is calcined at a temperature of 840oC for 1-2 min, a pin is stuck in the block segment and the patient.

After fitting the prosthesis in a patient, the prosthesis is subjected to final annealing (glazing) at a temperature of 860oC for 1-2 min, and placed in the patient's mouth.

Thus, the proposed method of making a removable ceramic laminar prosthesis consists of the following steps.

1. Made collapsible combined model.

The need for such a model is due to the fact that vytalkivaya block segment, which will be made prosthesis, make a mold. If you do not make portable model with vitakinesis unit, to receive further quality ceramic (refractory) model is almost impossible because it breaks down when removed from the mold, is not derived from the block-segment, and with its plaster model.

In addition, vitalicious block segment more effectively and efficiently carry out the fit of the frame of the prosthesis with its subsequent modeling of the porcelain mass base and artificial teeth.

This stage Obasanjo process, to the natural teeth, limiting defect).

2. Get the replica vytalkivaya block segment. The stage due to the fact, to obtain the refractory model of the ceramic material. If you don't get the impression it is from the block segment, you will not be able to manufacture refractory model without any defects. If you get the impression not with segments, as, for example, with all the jaw, because of the great length of the model in this cast, she extracted from him breaks. This step ensures that the accuracy of fit of the prosthesis to the limb zero.

3. Made from a cast model of the ceramic material with a thermal expansion coefficient equal to the coefficient of thermal expansion used porcelain mass.

The stage due to the fact that this model produces the firing of the porcelain mass (base layer) at a temperature in the range of 960o-1110oC.

Ceramic model provides the possibility of burning material (porcelain) with biological indifference in the mouth.

In addition, thermal expansion coefficient of this model when firing compensate for volumetric shrinkage of the porcelain mass equal to 30-33%

This stage obespechennogo field.

4. Carry out the heat treatment of the ceramic model.

The need for this stage due to the fact that if not to be fired model, the porcelain mass of uneven lies down on her because of the absence of the phenomenon of adhesion. In the presence of thin and thicker layers leads to the appearance of the prosthesis of microcracks and pores, reduces mechanical model of the porcelain mass. This stage due to the fact that when applied to the model layer immediately porcelain mass thickness 1,5-2 mm, porcelain mass when it is firing crack. This may result in breakage of the prosthesis. When applying a layer of porcelain mass thickness of 150-200 microns and subsequent firing of defects not observed. Multiple (5-6 times) floor model porcelain mass that accompanies firing after each coating provides mechanical strength and durability of the prosthesis.

The proposed method is used as follows.

Example 1.

The patient has no incisors of the lower jaw Recommended to make removable ceramic laminar prosthesis. Remove the working copy of the mandible and support with the upper jaw. Of the supporting cast, from somalina, del (supergips + gypsum). From the folding model push block segment containing the edentulous alveolar and restricting its natural teeth With this block, get cast Salescom 69. It uses a special device block size segment. This device is placed Silast 69 and put the entire block segment After curing of the dental impression material block segment is extracted from the mould. The cast is filled with the ceramic mass, the coefficient of thermal expansion which is equal to the coefficient of thermal expansion of the porcelain mass within a 5.0 5,510-61o/C. After solidification of the ceramic mass, the model is removed from the mold and subjected to heat treatment at a temperature of 500-550oC for 3-5 min After cooling models on it are the basic layer of the porcelain mass Siker. The thickness of 150-200 microns. Model then calcined at a temperature of 960oC for 1-2 min After cooling model on it again put a layer of base porcelain mass thickness of 150-200 microns, and again calcined at the same temperature. With the aim of obtaining the basis of a thickness of 2-2 .5 mm, base porcelain mass is applied 5-6 times and subsequent firing. Receiving a frame of the prosthesis (base, artificial teeth), it can reduce the developing unit segment. Achieve a tight and accurate fit of the frame on a block-segment. Then compare the working and auxiliary model in the position of Central occlusion. On the frame cause dentinal layer of porcelain mass, finally restoring the anatomical basis and artificial teeth. Dentinal layer is applied in layers (5-6 times), after each application of dentinal layer prosthesis fired. The firing is performed at a temperature of 860oC for 1 to 2 minutes, Then inspect the prosthesis to the patient. The prosthesis is easy to apply, well-fixed during functional movements of the mandible, exactly in the teeth-antagonists. The prosthesis additionally polished and subjected to firing (glazing) at a temperature of 860oC for 1-2 min, and is inserted into the patient's mouth.

Example 2.

The patient is recommended to make removable ceramic laminar denture in the upper jaw, compensating for the absence of teeth. Get a helper and a working cast. On the working cast is made of the usual (non-separable) plaster model. The area in which you want to make the prosthesis, and it is not ejected from the model. With this model, get cast Salescom 69. In this snapshot of p is Naya model broke down in the teeth area. This happened for the reason that the model is of great length and can not withstand efforts. The prosthesis is to produce such a model is inappropriate.

Example 3.

The patient's missing teeth. It is recommended to make removable ceramic laminar prosthesis. The initial steps are similar to those described in example 1.

Having ceramic model, it put a base layer of porcelain mass. The mixture is kept on the model of a thin layer. The reason is that there is no phenomenon of adhesion (adhesion) weight with ceramic model. The model must first be heat-treated.

Thus, the basic conditions for improving the quality of bulk ceramic plate prosthesis is getting a collapsible combined model, removing the cast from vytalkivaya block segment, obtaining refractory model of ceramic material with a thermal expansion coefficient equal KTR used porcelain mass, layering on ceramic porcelain model of mass with subsequent calcination after each layer. These factors provide the exact fit of the prosthesis to the limb field (the mucous membrane, natural the biological indifference and aesthetics of the prosthesis.

The use of the proposed method of manufacturing a removable ceramic laminar prostheses has the following advantages:

1. This method enables the manufacture of a prosthetic material (porcelain) that does not cause side effects in the mouth.

2. This method allows to improve the quality of prostheses, their aesthetics, strength and durability.

3. The ease of implementation of this method and its effectiveness can be widely used removable clinocerinae laminar dentures in practical health care.

A method of manufacturing a removable ceramic laminar prostheses, including the production of the plaster model, manufacturing base with artificial teeth with subsequent high temperature exposures, characterized in that the impression obtained ejected from the folding unit model segment, get the model of the ceramic material with a thermal expansion coefficient equal to the coefficient of thermal expansion of the porcelain mass, then the model is subjected to heat treatment and then applying it in layers of porcelain mass.

 

Same patents:

The prosthesis jaw // 2076662
The invention relates to medicine, in particular to oral and maxillofacial surgery and can be used in the production of maxillary dentures for operations osteosynthesis

FIELD: medicine.

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

FIELD: medicine.

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.

3 dwg

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.

10 dwg

FIELD: medicine.

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.

1 dwg

FIELD: medicine.

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.

FIELD: medicine.

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.

2 dwg

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.

19 dwg

Up!