RU2324456C1 - Method of control of fitting of artificial teeth in complete removable prosthesis relative to landmarks on patient's face and skull - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: radiopaque marker is put on the toothless upper jaw in the area of incisive papilla, centre of alveolar crest along the median face line; on the toothless lower jaw in the centre of alveolar crest along the median face line; on the wax construction of the upper prosthesis in the area of interincisor point of the central incisors; on the wax construction of the lower prosthesis in the area of the apex of distal buccal tuber below the lower second molar and the interincisor point of the lower central incisors. The lateral head teleradiography is performed in bite. The Camper's line, occlusal plane, axis of the central incisors, facial and nasolabial angles are plotted. The head teleradiography is analysed and the fitting of the artificial teeth is corrected.

EFFECT: determination of inclination of anterior superior central teeth in relation to prosthetic plane is improved.

2 dwg

Description

The invention relates to medicine, specifically to orthopedic dentistry, and can be used to verify the correct placement of artificial teeth in complete removable dentures relative to landmarks on the skull and face before the stage of replacing wax bases with plastic ones, since at this stage it is still possible to correct the location of artificial teeth .

A known method of controlling the setting of artificial teeth in complete removable dentures (complete denture design) on gypsum models in articulators and the oral cavity relative to the alveolar processes of the toothless jaws, upper and lower lips, control of the closure of artificial teeth (1. V.N. Kopeikin, etc. , Orthopedic dentistry, M., 1998, pp. 391-392 and 2. S.I. Krishtab, Orthopedic dentistry, Kiev, 1986, p. 253-254).

The disadvantages of the method of controlling the setting of teeth in complete removable dentures:

- it is impossible to control the location of the occlusal plane relative to the Camperian horizontal (prosthetic plane);

- it is difficult, but more often impossible to determine the inclination of the front upper central teeth relative to the prosthetic plane;

- it is difficult to accurately determine (prevents wax) the location of the front teeth relative to the incisal papilla;

- the lack of the ability to document the quality of the staging of teeth in complete removable dentures.

The technical result, the achievement of which the creation of this invention is directed, is to provide the possibility of controlling the placement of artificial teeth (especially anterior) in complete removable dentures relative to the landmarks of the skull and soft tissues of the face, the possibility of correcting the set of artificial teeth on the dentures and documentary (on the tele-radiograph) information storage about the quality of constructing artificial dentitions for a doctor, patient and law enforcement.

The essence of the invention lies in the fact that in the method of controlling the placement of artificial teeth in complete removable dentures relative to landmarks on the face and skull, which includes checking the design of complete removable prostheses on gypsum models and in the oral cavity, radiopaque markers (for example, gutta-percha for filling the root canal of the teeth) in the area of the main landmarks, in the bite, conduct lateral tele-radiography of the head, conduct a Camperian horizon al, occlusal plane, the axis of the central incisors, front and nasolabial angles and conduct telerentgenogrammy head with subsequent correction, if necessary, setting of artificial teeth.

The method of controlling the setting of artificial teeth in complete removable dentures relative to landmarks on the face and skull of the patient is as follows.

After staging of artificial teeth in complete removable dentures (bases are still wax), radiopaque markers are applied (glued) on the toothless upper jaw in the region of the incisal papilla (M), the center of the alveolar ridge (N) along the midline of the face; on the toothless lower jaw in the center of the alveolar ridge (H) also along the midline of the face. On the wax structure of the upper complete removable prosthesis, radiopaque markers are applied in the region of the intercutsal point of the central incisors (C), and on the wax structure of the lower prosthesis in the region of the apex of the distal buccal tubercle of the lower second molar (F) and the intercutsal point (E) of the lower central incisors.

After this, the wax structures of the complete dentures are inserted into the oral cavity and placed on the jaw. In the position of central occlusion, a lateral teleradiography of the head is performed and a teleroentgenogram is obtained (Figs. 1, 2) with images of radiopaque markers (M, N, C, E, H, F), where M is the incisal papilla; C is the inter-incisal point on the central incisors of the upper jaw; E is the inter-incisal point on the central incisors of the lower jaw; N and H are the centers of the crests of the alveolar processes of the edentulous jaw, F is the distal buccal tubercle of the lower second molar. Next, draw the Camperian line (horizontal AB), the prosthetic plane (CD), the occlusal plane (EF), the directions of the axes of the upper (CN) and lower (EB) central incisors, the angle γ is the front angle.

Then proceed to the analysis of the drawn lateral tele-roentgenogram of the head: determine the location of the central incisors of the upper jaw relative to the incisal papilla (usually normal = 8 ± 2 mm); the same teeth relative to the upper lip (with orthognathy of the nasolabial angle α≈90 °); the degree of overlap of the central incisors (with orthognathia, usually 2-3 mm); the degree of inclination of the upper central incisors relative to the Camperian horizontal (usually β = 45-55 °); the ratio of the occlusal and prosthetic planes (they are parallel or at an angle of 4-6 ° to each other) and the front angle γ≈80 ° (N.V. Kalinina, V.A. Zagorsky, Prosthetics with complete loss of teeth, M .: Medicine, 1990, p. 139, 165). If necessary, after analyzing the tele-roentgenograms of the head, the location of the teeth (especially the anterior ones) is adjusted or the stage of constructing artificial dentitions is completely redone.

We used a method for controlling the setting of artificial teeth in complete dentures relative to landmarks on the face and skull for 20 patients. Received and analyzed 20 teleradiographs. The analysis made it possible in 12 cases to correct the setting of the artificial front teeth on the upper lip and the prosthetic plane on wax structures and in 2 cases the teeth were re-placed on both prostheses. In the remaining 6 cases, artificial teeth were designed correctly.

Thus, the method of controlling the setting of artificial teeth in complete removable dentures relative to landmarks on the face and skull of the patient can improve the efficiency of prosthetics in patients with complete absence of teeth.

Claims (1)

A method for controlling the setting of artificial teeth in complete removable dentures relative to landmarks on the patient’s face and skull, including checking the design of complete removable dentures on gypsum models and in the oral cavity, characterized in that before applying the structures, radiopaque markers are applied on the toothless upper jaw in the region of the incisal papilla, the center of the alveolar ridge in the midline of the face; on the toothless lower jaw in the center of the alveolar ridge along the midline of the face, on the wax structure of the upper prosthesis, radiopaque markers are applied in the region of the incisor point of the central incisors, on the wax structure of the lower prosthesis in the region of the apex of the distal buccal tubercle of the lower second molar and the intercavity point of the lower central incisors, in the bite carries out lateral tele-radiography of the head, builds the Campaign line, the occlusal plane, the axes of the central incisors, the facial and nasolabial angles, and analyze the tele x-ray of the head, if necessary, after analysis of tele-roentgenograms correct the setting of artificial teeth.

Images