RU9711U1 - DEVICE FOR SIMULATING AN OCCLUSION SURFACE OF A PROSTHESIS - Google Patents

Abstract

A device for modeling the occlusal surface of the prosthesis, containing a facial arch provided with ear and nose stops, and an extraoral element made in the form of a dentition, to which a metal rod with a hole at the distal end for the recording element is rigidly fixed, characterized in that the device further comprises a graphic a tablet connected by means of a U-shaped element parallel to the front arc, the base of the tablet is connected to an electronic computer, the recording element is also connected to an electronic computer.

Description

DEVICE OF MODERN SUSHROOM NOBEPXHOCTIi

PROSTHESIS

The utility model relates to medicine, and specifically to orthopedic dentistry and can be used for individual design, prosthesis,

Occlusion is observed in many congenital and acquired pathological conditions of the mouth (malformations of the jaw, partial loss of teeth, periodontal disease, diseases of the temporomandibular joint (TMJ), etc.) and are usually accompanied by impaired jaw movement.

Therefore, first of all, it is necessary to as accurately as possible D1 / agnostify such violations in order to take them into account when prostheses are exhausted and, secondly, reconstructed teeth that are damaged or missing, so that the restored teeth do not violate the existing occlusal contacts, that is, to achieve, if possible, the optimal quality of the occlusal surface of the prosthesis.

A device is known for modeling the occlusal surface of the prosthesis, selected as a prototype, containing a facial arch, equipped with ear and nose stops and an extraoral element, made in the form of a dentition to which a metal rod is rigidly fixed with an opening at the distal end for a recording element (see Shcherbakov A .C, et al. Orthopedic dentistry, textbook, 5th ed., CI6, s, 376-384).

The known device operates as follows.

The facial arch is fixed to the patient using the ear and nasal stops .. One end of the arch ends with a metal rod with a pencil. The pencil is installed in the area of the joints perpendi-2 -

kullarno to the skin. Hard paper is placed on the patient’s jaw in the joint area so that its lower edge bent at an angle is strictly parallel to the facial arch, which is an occlusal plane. Record the angle of the sagittal articular path. Jfea records the fragility of the sagittal incisor path the pencil is inserted into the distal opening of the metal rod, which is rigidly and strictly perpendicular to the extraoral element and set accordingly to the area of the front teeth. The end of the pencil is set against the incisor point, and the paper is placed strictly in the sagittal plane. When opening the mouth and extending the lower jaw, the pencil draws the path of the sharp point on the paper. Recording is carried out without a facial arc. Without the facial arch, the lateral incisal path is also recorded, while one metal rod is attached to the bite of the lower jaw. At the end of the star is a metal pad. The second metal rod connected with the upper bite roller ends with a pin, the tip of which leaves strokes on the plate during lateral movements of the jaw. Obtained: records of the movement of the lower jaw are used when installing models of the jaw in the articulator.

However, modern articulators are made taking into account the angles of the articular path, the Bennett angle and other parameters with the possibility of their subsequent adjustment individually for each patient. So the need for graphic data obtained using the prototype device has lost its relevance. Currently, the facial arch is used for orienting the upper dentition in relation to the hinge axis of the patient and then the data obtained are transferred to the space between the articulator frames. 11 the articular axis of the articulator should be located at the same distance from the jaws as the patient’s, Otherwise, the movement in the articulator should not

will correspond to the movements of the lower jaw of the patient and, consequently, the creation of a functional occlusion in the articulator is impossible; premature contacts are formed in the central ratio of the jaws. The graphical record obtained with the help of the front arc is not very accurate due to the mobility of the L1 arch of the arch on the patient’s head.

The objective of the proposed utility model is to achieve optimal quality of the occlusal surface of the prosthesis by increasing, accuracy and reliability of the graphic registration of movements of the lower jaw.

The problem is solved in that in the known device for. modeling of the occlusal surface of the prosthesis containing the facial arch, equipped with ear and nose stops and an extraoral element made in the shape of a tooth row, to which a metal rod with a hole at the distal end for the recording element is rigidly fixed, the device further comprises a graphic tablet connected by means of -shaped element parallel to the front arc, the base of the tablet is connected to the electronic computer, but the recording element is also connected to the electronic computer th machine.

On fig shows the proposed device for modeling the occlusal surface of the prosthesis.

The device contains a facial jiyry I, equipped with ear 2 and nose 3 stops and extraoral element 4, made in the form of a dentition. A megallic rod is perpendicularly and rigidly fixed to the extraoral element. 5 with an opening at the distal end for recording: the recording element 6. The graphic tablet 7 is connected to the front arc I by means of a U-shaped element 8 and parallel to it. The base of the tablet and the recording element are connected to the ES.

- 3 4 The authors of the utility model in their work use a semi-adjustable articulator С и1Ск: Pf lfGtT and the pitch arc “; Ref: Axis Firm .D. (France),

Using the proposed device, II patients with intact dentition and TMJ dysfunction and 43 patients with included defects in the lateral parts of the dentition complicated by deformations of the dentition were examined. The control group consisted of 10 people with intact dentitions and an orthognathic bite.

Measurement accuracy control was carried out by means of parallel recording using an apparatus (Italy), consisting of two video cameras connected by a computer. Deviations in the accuracy of the data obtained using the proposed device did not exceed 3.

Graphic registration of movements of the lower jaw using the proposed device makes it possible:

-to evaluate the symmetry of the movement of the articular heads during various movements of the lower jaw;

-establish whether there is a shift in the rear contact position and central occlusion in the usual occlusion;

-determine whether there are restrictions on the movements of the lower jaw guided by the TMJ and chewing muscles;

-identify premature occlusal contacts, restricting or changing the movement pattern of the lower part.

Thus, the proposed device for modeling the occlusal surface of the prosthesis can significantly improve the accuracy of diagnosis of occlusal abnormalities and use the obtained graphic data when modeling the occlusal surface of the prosthesis, which allows to ensure high quality in the manufacture of an individually designed surface of the prosthesis,

- 5

With the help of ear and nasal stops, the facial arch is fixed on the patient's head. With the help of a U-shaped element, a graphic tablet is attached to the crib arc in parallel with the t-arc. The tablet is connected to a computer. An extraoral element with a metal rod will be fastened to the teeth of the lower jaw. A recording element, a digitizer pen, is inserted into the hole of the sterlet and also connected to the EVI. The patient is asked to perform the following movements with his lower jaw:

- from the half-central occlusion shift the lower jaw into the front occlusion;

- from the position of central occlusion, move the lower jaw to the right lateral occlusion;

- from the central occlusion shift the lower jaw to the left lateral occlusion;

-from the position of the central occlusion move neither} I jaw the jaw in the back contact position

In this case, information about the movement of the lower jaw is recorded using EBI. The recording element does not apply to the graphics tablet. On the graphic record, a Gothic angle, the position of the central OKLU31Sh, sagittal incisor path are obtained. Then the facial arch is transferred to the articulator. The model of the lower jaw is mounted on an occlusal plate, the model of the upper jaw is placed in the position of central occlusion. An extraoral element with a digitizer pen is attached to the gypsum plaster of the lower jaw. The printed data of the graphic recording is a crscht plushiogram to the front area of the articulator. The movements of the lower jaw are recreated in the articulator by moving its central pin along the fuzziogram comparing the obtained graphic record with the occlusal surface of the model.

Claims (1)

A device for modeling the occlusal surface of the prosthesis, containing a facial arch provided with ear and nose stops, and an extraoral element made in the form of a dentition, to which a metal rod with a hole at the distal end for the recording element is rigidly fixed, characterized in that the device further comprises a graphic a tablet connected by a U-shaped element parallel to the front arc, the base of the tablet is connected to an electronic computer, the recording element is also connected to an electronic computer.