RU113949U1 - DEVICE FOR CORRECTION OF CLAMMERS ON ORTHOPEDIC CONSTRUCTIONS FROM THERMOPLASTES - Google Patents

Abstract

A device for correcting clasps on orthopedic structures made of thermoplastics, including a heating element, characterized in that it is equipped with removable plates with heating elements, which, when closed in the inner part, form a spherical, rectangular or elliptical chamber, with the plates fixed by a closure limiter.

Description

The invention relates to medicine, namely to the field of dentistry.

Orthopedic constructions made of thermoplastics are increasingly used in dental practice. But during the fitting and installation of prostheses in the oral cavity, it is often necessary to adjust the gingival clasps of dentures from thermoplastics. For this, it is necessary to heat up the thermoplastic structure at the place where the base of the prosthesis passes into the clasp or the periodontal clasp to the softening temperature. Depending on the thermoplastic used, it ranges from 150 ° C to 250 ° C [1].

In dental practice, for this purpose they resort to warming with the help of heat guns (hair dryers) [1].

The disadvantage of this heating method is that it is impossible to adjust the heating temperature of the thermoplastic. When heated with an air gun, a large area of the orthopedic structure warms up, which can lead to deformation of the entire prosthesis.

Known heating of the prosthesis in boiling water [1].

But when warming up, it is necessary to immerse the entire prosthesis or part of the prosthesis in boiled water. In this case, thermal deformation of the entire prosthesis can occur, and it is also impossible to warm the prosthesis to a predetermined temperature.

To warm the prosthesis, an electric dental spatula is used, which consists of a heating element made in the form of a knife and, depending on the wax used, the temperature of the spatula can be changed [2].

However, heating the thermoplastic with a spatula leads to uneven heating of it from two sides, damage (melting) of the thermoplastic is possible.

The task is to uniformly heat up a certain section of the orthopedic structure to a certain temperature, depending on the type of thermoplastic used.

The task is achieved by a device in the form of pliers, to the working part of which are attached removable metal plates with thermocouples inside them, allowing them to be heated to a given temperature.

Figure 1 shows a device made of stainless steel, consisting of a holder with handles (1), at the working ends of which there are protrusions (2), on which removable stainless steel plates with heating elements inside them are mounted on pairs of various shapes and sizes ( 3). There is a closing stop on the device handle (4). The wires of the heating elements (5) are brought out.

In Fig. 2, removable plates measuring 15 × 10 × 10 mm. They are two squared bars. On the inner side of each plate in the middle part there are spherical recesses (6) with a radius of 0.2 mm. When the plates connect; with each other, a spherical chamber with a diameter of 0.4 mm is formed.

In Fig. 3, removable plates of size 15 × 10 × 10 mm, in the upper part from the inside, have a rectangular cutout (7) of size 10 × 20 × 5. In the closed state of two plates, a rectangular chamber (7) 10 × 20 × 10 in size is formed.

In figure 4, the removable plate size of 15 × 10 × 10 mm are elliptical 2 mm recesses, 6 mm long. (8). In the closed state of these plates, an ellipsoidal chamber is formed.

In the connected state, the plates are fixed by the closing stop (4).

The device operates as follows.

The selected plates, depending on the diameter of the clasp or the thickness of the prosthesis, are put on the ends of the holder, bring them to the clasp or a certain place in the orthopedic structure that needs to be corrected, pressed on both sides and fixed with a closing limiter. Connect the heating elements to an energy source adjustable from 3 to 12 volts and set the required temperature, according to the material used. Heated for 1-2 minutes, depending on the thickness of the thermoplastic. After that, the heating elements are unclenched and the clasp is pushed in the desired direction with the fingers, and the entire structure is placed in cold water. After 30 seconds, remove the prosthesis from the water and carry out the fitting of the prosthesis. If it is necessary to additionally move the clasp or bend the frame of the prosthesis, then repeat the procedure again.

Example 1. Patient A, when fitting and applying a prosthesis made of nylon, the left dentoalveolar clasp is put on the tooth on the lower jaw with great effort, injuring the mucous membrane in the alveolar part of this clasp.

The proposed device is applied to the problem clasp closer to the base of the prosthesis, set the temperature to 125 degrees, heated for one minute. Using your fingers, push the clammer to the outside and place it under cold water. When applying a prosthesis, the clasp freely passes the equator of the tooth without injuring the mucous membrane.

Example 2. Patient B, using a prosthesis for 2 years, complained of poor fixation of the prosthesis. The prosthesis is made of polymethyl methacrylate and the clasps are made of polyoxymethylene (Dental D). Clasps freely pass the equators of supporting teeth. On the proposed device set the temperature (for hydroxypolymethylene it is 150 degrees) and impose it on the clasps closer to the base of the prosthesis. After warming up for 1 minute, the clasp is bent toward the tooth, after which the prosthesis is placed in cold water. After 30 seconds, when fitting the prosthesis in the oral cavity, its fixation is good.

The use of the proposed device provides easy and reliable regulation of thermoplastic clasps. The required temperature set to the melt point of this thermoplastic warms up the clasp well, without leaving any traces of melting on it and allows you to accurately adjust the clasps of dentures from thermoplastics.

Information sources:

1. Tregubov I.D., Mikhailenko L.V., Boldyreva R.I. et al. The use of thermoplastic materials in dentistry. Uch. allowance. M., 2007.- 140 p.

2. Trezubov V.N., Steingart M.Z. et al. Orthopedic dentistry. Uch. Benefit St. Petersburg 1999. -320 p.

Claims (1)

A device for the correction of clasps on orthopedic constructions made of thermoplastics, including a heating element, characterized in that it is equipped with removable plates with heating elements that form a spherical, rectangular or elliptical chamber when locked in the internal part, and the plates are fixed with a closing limiter.