RU2324455C1 - Device for obtaining imprints of upper jaw - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: device for obtaining the imprints of the upper jaw in palate abnormalities is made in shape of a spoon, which consists of handle, body and borders. On the running surface of the spoon body, the semispherical elevated area faced towards the tissue defect is made, with longitudinal, transverse and circular grooves on it.

EFFECT: repair of abnormal face configuration and obtaining of high quality imprint during one visit are provided.

2 dwg

Description

The invention relates to medicine, its section of orthopedic dentistry, and can be used to obtain an impression for the manufacture of a denture for patients with extensive defects in the tissues of the maxillofacial region.

Existing designs for impression spoons manufactured by the industry and used to remove impressions from the upper jaw in patients who underwent surgery for unilateral resection of the jaw provide for the handle and body of the spoon [German Patent No. 837437, cl. 30 10, 1949. USSR author's certificate No. 578959, class. А61С 9/00, 1975. USSR author's certificate No. 1695910, class. A61C 9/00, 1989]. After applying the impression material spoon to the working surface of the spoon, it is introduced into the patient’s oral cavity, an impression is obtained, on which the working model is cast from gypsum [Trezubov V.N., Scherbakov A.S., Mishnev L.M. Orthopedic dentistry. St. Petersburg, 2005].

The disadvantages of these designs are that there is no restoration of a face configuration that is disturbed as a result of the operation, since the tissues of the upper lip and cheek sink due to the lack of bone support, which makes it difficult to obtain an adequate imprint of the prosthetic bed. Therefore, to take a high-quality impression, an indicative impression of elastic materials is needed, on which the gypsum model is cast and an individual spoon is made on it. But due to the significant retention of the tissues of the upper lip and cheek on the side of the operation, the manufacture of several individual spoons is required, which leads to an increase in the consumption of auxiliary materials, lengthening the production time of the vital prosthesis for the patient, which, in turn, leads to an increase in the cost of the denture. Attempts to correct an already obtained print with a new portion of impression material worsen the quality of the print. This is due to the fact that the material of the impression is in contact with the oral fluid of the patient, and with insufficient drying, peeling of a new portion of the material occurs, and pores appear on the cast according to this impression of the gypsum model. The resulting print has an uneven thickness and has unequal compliance, due to the heterogeneity of the material. Structurally difficult spoons are difficult to enter into the patient’s oral cavity, as there may be difficulty in opening the mouth due to contracture of the masticatory muscles. In addition, the devices present difficulties in their industrial manufacture.

For the first time, the design of an impression tray on the upper jaw was proposed, which makes it possible to obtain a uniform impression thickness and provide the same pliability of the impression, which makes the model made of gypsum accurate, due to the presence of a hemispherical protector on the working surface of the spoon, which is an additional hemispherical elevated area facing the side of the defect tissues on which longitudinal, transverse and circular grooves are located.

The proposed design of a device for producing impressions from the upper jaw is shown in figure 1,

where 1 is the handle of the spoon;

2 - the body of the spoon;

3 - the sides of the spoon;

4 - hemispherical elevating region;

5 - circular groove;

6 - longitudinal groove;

7 - transverse groove.

General view of the spoon is shown in figure 2.

The working surface of the body of spoon 2 (Fig. 1A and B, Fig. 2) has an additional hemispherical elevating region 4 (Fig. 1A and B, Fig. 2), after filling the spoon with impression material and introducing it into the patient's mouth, it is distributed over longitudinal 6 (figa and b, fig.2), transverse 7 (figa and b, fig.2) and circular 5 (figa and b, fig.2) grooves providing uniform distribution of material and its retention to the working surface of the spoon. After hardening the impression mass, the spoon is removed from the patient’s oral cavity.

The resulting print does not require additional correction due to the presence of a hemispherical tread on the working surface of the spoon, which ensures the restoration of the broken face configuration and contributes to the adequate distribution of the impression material on the surface of the spoon. The terms of manufacturing a denture prosthesis are reduced by obtaining a high-quality impression in one visit to the patient. The economical consumption of auxiliary materials reduces the cost of the prosthesis. The spoon is ergonomic and simple in its industrial production.

Studies have shown that the manufacture of composite dentures from impressions obtained using a device for producing impressions from the upper jaw with a hemispherical protector improves their quality, reduces the cost and time of manufacturing prostheses, and therefore, the quality of life of patients is increased.

Claims (1)

A device for producing impressions from the upper jaw in case of palatal defects, made in the form of a spoon consisting of a handle, body and sides, characterized in that on the working surface of the body of the spoon an additional hemispherical elevated region is made, facing the tissue defect, on which longitudinal transverse and circular grooves.

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