RU2446739C1 - Method of biometric orthodontic diagnostics on jaw models - Google Patents

Abstract

FIELD: medicine. ^ SUBSTANCE: invention relates to medicine, namely to orthodontic dentistry, and is intended for analysis of diagnostic models in biometric diagnostics. Impressions from upper and lower jaws are made by means of alginate mass. Gypsum diagnostic models are cast. By means of ruler and marker line N is applied on gypsum diagnostic model of upper jaw on median palatine suture. After that transversal P line, oriented through blind openings on soft palate is applied perpendicular to line N and basis point O is put on the middle of the distance between blind openings. In order to create diagnostic triangles additional lines are applied: from basic point O on the middle of the distance between blind openings and to median point D on distal approximal surface of measured tooth; from point D perpendicular is drawn to intersection with transversal diagnostic line P in point A. Diagnostic triangle ODA is obtained. Transversal line P is projected on gypsum diagnostic model of lower jaw by means of vertically oriented wax pin, fixed on upper jaw model in basic point O on the middle of the distance between blind openings, and composition of models in correct occlusion. On lower model point of O point projection is marked by means of marker and point On is applied on gypsum model of lower jaw. Line Pn and perpendicular to it line Nn are drawn. Diagnostic triangles for each measured tooth of lower jaw are built by application of additional lines: from point On to median point Dn on distal approximal surface of measured tooth, and from median point Dn to transaction with transversal diagnostic line Pn in point An. Diagnostic triangle for gypsum model of lower jaw OnDnAn is obtained. Sides of triangles are measured, length of catheti OA, DA, OnAn, DnAn are compared by number of present teeth and tooth number: from ODA 18 to ODA 28 and from ODA 38 to ODA 48 before, at the stages and after orthodontic treatment. If length of cathetus OA, OnAn increases, vestibular displacement of tooth is diagnosed, if length of cathetus OA, OnAn decreases, oral displacement of tooth is diagnosed. If length of cathetus DA, DnAn increases, mesial displacement of tooth is diagnosed, if length of cathetus DA, DnAn decreases, distal displacement of tooth is diagnosed. If length of cathetus OA, OnAn increases and length of cathetus DA, DnAn increases, mesio-vestibular displacement is diagnosed, if length of cathetus OA, OnAn increases and length of cathetus DA, DnAn decreases, disto-vestibular displacement of tooth is diagnosed, if length of cathetus OA, OnAn decreases and cathetus DA, DnAn increases, mesio-oral displacement of tooth is diagnosed, if length of cathetus OA, OnAn decreases and cathetus DA, DnAn decreases, disto-oral displacement of tooth is diagnosed. On the basis of obtained measurement data value of each tooth displacement if necessary direction and construction of force element of orthodontic apparatus are planned before treatment. On the basis of obtained measurement data direction of displacement and value of each tooth displacement are corrected during treatment by correction of shape and position of force element of orthodontic apparatus. After treatment completion obtained data are analysed and quality of performed orthodontic corrections is determined by comparison of planned and obtained results of teeth displacement. ^ EFFECT: method makes it possible to improve qualities of diagnostics and orthodontic treatment and obtain possibility to plan spatial displacement of all teeth due to selection of stable basic point and possibility to determine accurate linear values of displacement and direction of displacement of teeth. ^ 4 dwg, 2 tbl, 1 ex

Description

The invention relates to medicine, in particular to orthodontic dentistry, and can be used to analyze diagnostic models in biometric diagnostics.

Measurements of diagnostic models of the jaws and analysis of the data obtained is carried out in order to assess the severity of the close position of the teeth, to identify individual discrepancies in the size of the teeth and jaws, to determine the narrowing and shortening of the dentition, underdevelopment of the apical base, as well as to plan the direction and magnitude of the movement of teeth during orthodontic treatment.

A known method for determining the mesial displacement of the posterior teeth according to Schwarz. Unilateral discrepancy in the location of the posterior teeth is determined by the ratio of the tangents drawn to the distal surface of the premolars and molars perpendicular to the median palatine suture. With unilateral mesial displacement of the posterior teeth, a distance appears between these lines. The greater this distance, the greater the shift of the posterior teeth (P.A.Zhelezny, N.A. Plotnikova. Orthodontics and children's prosthetics. Novosibirsk, 1998. P 28, 31).

The disadvantages of the method:

1. It only determines the length of the segments, but does not determine the position of the tooth segments in relation to each other in planes.

2. Using the method it is impossible to determine the incorrect position of the individual teeth of the segments and to plan the direction of movement of the teeth.

In the practice of orthodontics, a method is widely used to determine the mesial displacement of the crowns of the first superior premolar and crowded teeth of the anterior segment according to G. Schmuth, characterizing their position in relation to the diagnostic line of RPT (suture-papillary transverse line). This line is drawn through the posterior edge of the incisal papilla and the base of the first pair of transverse palatal folds, perpendicular to the median palatine suture. When the posterior teeth are correctly positioned, the RPT line intersects the fang crowns. Determining the location of the first premolar in relation to the RPT line helps establish indications for orthodontic treatment, or evaluate the results of treatment (P.A.Zhelezny, N.A. Plotnikova Orthodontics and pediatric prosthetics. Novosibirsk, 1998. pp. 31-32).

The disadvantages of the method:

1. Determines the ratio of teeth in the sagittal plane (displacement mesial or distal), but does not determine the position of the teeth when they are displaced in the transverse plane.

2. The tangent lines change their position when the teeth are displaced, which makes it impossible to determine the direction and magnitude of the tooth displacement.

The closest way to the claimed invention in terms of features is the method of analysis of the dentition according to M.Z. Mirgazizov (linear and angular characteristics). The method used characterizes the size of the apical basis of the jaws, the anterior portion of the dentition, the length of the upper dental arch and the position of the teeth of the upper and lower jaws in relation to the first molars.

Measurement procedure: the studied model is strengthened on a parallelometer stage with an angular mechanism. On the jaw model, a conditional base measurement point is found, which is taken as the intersection point of the mid-sagittal line with a line passing through the contact surfaces of the first permanent molars. The measuring ruler, which is used as a caliper fixed to the table, is adjusted so that it coincides with the mid-sagittal line. Moreover, the fixed leg of the ruler coincides with the base point of measurement. After that, the movable leg of the ruler is brought to the middle of the mesial approximate surface of the tooth and linear indicators are taken. Further, rotating the table around the vertical axis and moving the movable leg of the measuring ruler, bring it to the next point on the tooth. Thus, the position of each tooth is determined by two linear and one angular measurements (SV Chernenko, “Orthodontics for adults. Methods of preparing the oral cavity for prosthetics in case of abnormalities and deformations of the position of the teeth and occlusion.” - M., Mittel Press LLC printing house , 2009., pp. 46-47).

The disadvantages of the method:

1. Instability of the reference point in the process of orthodontic movement of teeth.

2. Lack of tooth movement data for the first, second and third molars of the upper and lower jaws.

3. The need for a special measuring device for measuring the angle of the studied tooth (goniometer, protractor, etc.).

4. The difficulty of calculating the amount of tooth movement based on a combined analysis of the length of two linear quantities and the degree of tooth position.

5. It is impossible to obtain numerical data on the movement and direction of movement of individual teeth of the front and side segments in the process of orthodontic treatment.

6. It is impossible to obtain comparative numerical data on the position of the teeth before treatment, in the direction and magnitude of the movement during and after the orthodontic movement.

The objective of the invention is to improve the quality of diagnostics and orthodontic treatment, to obtain the possibility of planning and complex spatial movement of all teeth, by choosing a stable base point, the ability to build diagnostic triangles for each tooth, measuring the sides of this triangle provides the exact linear values of the movement and direction of movement of the teeth.

The problem is achieved by the method of biometric orthodontic diagnosis on models of the jaws. The method includes casting molds, casting gypsum diagnostic models, applying a transverse diagnostic line, a base point and points on the surface of the teeth on the gypsum diagnostic model of the upper jaw, connecting the points with lines, measuring the length of the lines. The base point and the transverse diagnostic line are projected onto the gypsum diagnostic model of the lower jaw, the points on the surface of the teeth are applied to it, and the points are connected by lines. Measure the length of the lines.

The transverse line P on the gypsum model of the upper jaw is drawn through the blind openings of the soft palate perpendicular to the median palatine suture N. At the middle of the distance between the blind openings on the line P, put the base point O, connect it to the middle of the distal approximate surface of the tooth under study - point D. From point D lower the perpendicular to the line P and at the intersection put point A, get a diagnostic triangle ODE. On the gypsum model of the lower jaw from the projection of the base point, He draws a line to the middle of the distal approximate surface of the studied tooth Dn, lower the perpendicular to the Mon line and put the point An at the intersection, get the diagnostic triangle OnDnAn. Measure the sides of the triangles, compare the length of the legs OA, DA, OnAn, DnAn before and after orthodontic treatment. With an increase in the length of the leg of OA, OnAn, vestibular tooth displacement is diagnosed. With a decrease in the length of the leg OA, OnAn, an oral tooth displacement is diagnosed. With an increase in the length of the leg YES, DnAn, mesial tooth displacement is diagnosed. When reducing the length of the leg YES, DnAn diagnosed with distal tooth displacement. With an increase in the length of the leg of OA, OnAn and an increase in leg of YES, DnAn, mesio-vestibular displacement is diagnosed. With an increase in the length of the catheter OA, OnAn and a decrease in the cathete YES, DnAn, disto-vestibular tooth displacement is diagnosed. With a decrease in the length of the leg OA, OnAn and an increase in leg YA, DnAn, a mesioral tooth displacement is diagnosed. With a decrease in the length of the catheter OA, OnAn and a decrease in the cathete YES, DnAn, a distal oral tooth displacement is diagnosed.

Novelty of invention

- The diagnostic transverse line P on the gypsum model of the upper jaw is drawn through blind holes in the soft palate perpendicular to the median palatine suture N. The position of the transverse line on the jaw practically does not change during orthodontic treatment.

- The choice of the point O on the transverse line P in the middle of the distance between the blind holes allows you to objectively and accurately orient it on gypsum models, thereby standardizing the measurement method. The orientation of the O point in the soft palate and its independent stable position allows accurate measurements for all teeth of the upper and lower jaw, regardless of their orthodontic movement along the alveolar process.

- Construction of a diagnostic triangle for each tooth in the upper jaw by additional drawing auxiliary lines: a radial line from point O to point D on the median distal approximate surface of the measured tooth, and a perpendicular line from the midpoint D to intersect with the transverse diagnostic line P at point A, makes it possible to obtain a mechanism for determining the initial position, direction and magnitude of tooth movement before, during and after orthodontic treatment, by comparing the values legs of triangles obtained. When measuring on the lower jaw, the transverse line P and point O are projected onto the gypsum diagnostic model of the lower jaw to obtain the Mon line, the He points and the auxiliary lines OnDn, DnAn are drawn, an OnDnAn triangle is built for the teeth of the lower jaw.

- Measure the length of the legs of the obtained triangles. The ability to compare the length of the triangle legs for each tooth before, at the stages and after treatment allows us to determine not only one-sided, but also the complex spatial movement of the studied tooth, allowing individual design and direction of the impact of the power elements of the orthodontic apparatus for each patient, which increases the quality of treatment and reduces his terms. With an increase in the length of the leg of OA, OnAn, a vestibular displacement of the tooth is diagnosed, while a decrease in the length of the leg of OA, OnAn is diagnosed with an oral displacement of the tooth. With an increase in the length of the leg YES, DnAn, the mesial displacement of the tooth is diagnosed, while a decrease in the length of the leg YES, DnAn diagnoses a distal tooth displacement. With an increase in the length of the catheter OA, OnAn and an increase in the catheter YES, DnAn, I diagnose a mesio-vestibular displacement, with an increase in the length of the catheter OA, OnAn and a decrease in the catheat OA, DnAn, a diagnosis of disto-vestibular displacement of the tooth, with a decrease in the length of the catheter OA, OnAn and an increase in the catheat YES , DnAn diagnose a mesio-oral tooth displacement, with a decrease in the length of the catheter OA, OnAn and a decrease in the catheter YES, DnAn diagnose a distal oral displacement of the tooth.

The set of essential features of the invention allows to obtain a new technical result. When measuring diagnostic models before treatment, the method allows you to determine the direction and magnitude of the planned movement of each tooth in the jaw. When measuring diagnostic models during treatment, the method allows to identify the direction and magnitude of the necessary correction of the movement of each tooth in the jaw to obtain the intended result. When measuring diagnostic models after treatment, the method allows to ascertain the size and direction of the displaced segments of the dentition and individual teeth of the lateral segments and to evaluate the quality of the orthodontic treatment. The ability to compare the length of the legs of the triangles for each tooth before, at the stages and after treatment, expressed in numerical values, allows you to more accurately plan the magnitude of the movement of the power element of the orthodontic apparatus and carry out its correction in the process of orthodontic treatment.

The invention is illustrated in Fig 1-4.

Figure 1 presents the drawing of lines and dots on the model of the upper jaw: P - transverse diagnostic line oriented through blind holes in the soft palate perpendicular to the median palatine suture; additional lines: from the base point O in the middle of the distance between the blind holes and to the midpoint D on the distal approximate surface of the measured tooth, and the perpendicular line from point D to the intersection with the transverse diagnostic line P at point A.

Figure 2 presents the drawing of lines and points on the model of the lower jaw: Mon - transverse diagnostic line oriented through It; additional lines: from the base point He to the midpoint of Dn on the distal approximate surface of the measured tooth, and the perpendicular line from the Dn to the intersection with the transverse diagnostic line Mon at An.

Figure 3 presents photographs of gypsum models of the upper and lower jaws of patient R., 25 years old, before orthodontic treatment with diagnostic triangles of ODA for teeth 14, 15, 16, 17, 44.

Figure 4 presents photographs of gypsum models of the upper and lower jaws after orthodontic treatment with the applied diagnostic triangles of ODA for teeth 14, 15, 16, 17, 44.

The method is as follows.

The patient is taken casts of the upper and lower jaws with an alginate mass. Then cast gypsum diagnostic models. Using a ruler and marker, line N is applied to the gypsum diagnostic model of the upper jaw along the middle palatine suture. Then, a transverse P line, oriented through the blind holes in the soft sky, is drawn perpendicular to line N, and base point O is placed in the middle of the distance between the blind holes. To create diagnostic triangles, additional lines are drawn: from base point O in the middle of the distance between the blind holes and to the middle point D on the distal approximate surface of the measured tooth; from point D lower the perpendicular to the intersection with the transverse diagnostic line P at point A. Obtain a diagnostic triangle ODE. Measure the length of the legs OA and YES of the triangle ODE with a ruler. On the gypsum model of the upper jaw, diagnostic triangles are possible by the number of teeth present and tooth number: from ODA 18 to ODA 28.

A transverse P line is projected onto the gypsum diagnostic model of the lower jaw. To do this, using a vertically oriented wax pin, mounted on the model of the upper jaw at the base point O at the middle of the distance between the blind holes, and compiling the models in the correct occlusion, mark the projection point of the point O on the lower model with a marker and apply the gypsum model of the lower jaw point He . Draw lines Mon and perpendicular to it line Nн. Diagnostic triangles are constructed for each measured tooth of the lower jaw by drawing additional lines: from the point He to the midpoint of Dn on the distal approximate surface of the measured tooth, and from the midpoint of Dn to the intersection with the transverse diagnostic line of Mon at point An. Obtain a diagnostic triangle for the plaster model of the lower jaw OnDnAn. Measure the length of the legs of the triangle for the test tooth with a ruler or vernier caliper according to the number of teeth of the lower jaw and tooth number: from ODA 38 to ODA 48. Compare the length of the legs of the diagnostic triangle before, at the stages and after orthodontic treatment.

With an increase in the length of the leg of OA, OnAn, a vestibular displacement of the tooth is diagnosed, while a decrease in the length of the leg of OA, OnAn is diagnosed with an oral displacement of the tooth. With an increase in the length of the leg YES, DnAn, the mesial displacement of the tooth is diagnosed, while a decrease in the length of the leg YES, DnAn diagnoses a distal tooth displacement. With an increase in the length of the catheter OA, OnAn and an increase in the catheter YES, DnAn, I diagnose a mesio-vestibular displacement, with an increase in the length of the catheter OA, OnAn and a decrease in the catheat OA, DnAn, a diagnosis of disto-vestibular displacement of the tooth, with a decrease in the length of the catheter OA, OnAn and an increase in the catheat YES , DnAn diagnose a mesio-oral tooth displacement, with a decrease in the length of the catheter OA, OnAn and a decrease in the catheter YES, DnAn diagnose a distal oral displacement of the tooth. On the basis of the obtained measurement data before treatment, the amount of movement of each tooth in the necessary direction and the design of the strength element of the orthodontic apparatus are planned. Based on the obtained measurement data during treatment, the direction of movement and the amount of movement of each tooth are adjusted by correcting the shape and position of the power element of the orthodontic apparatus. After completion of treatment, an analysis of the data obtained is carried out and the quality of the orthodontic corrections is determined by comparing the planned and obtained result of the movement of the teeth.

Example

As an example of using the method, we provide an extract from the medical history of patient R., 25 years old. The patient complained of a cosmetic defect due to crowding of the front teeth of the lower jaw and the absence of a right upper canine in the dentition, and periodontal problems began due to difficulty in brushing teeth and dental deposits. Previously, I did not apply for orthodontic help. Objectively: there is a normal type of face, the normal position of the soft tissues of the lips to the aesthetic plane of Ricketts, the nasolabial angle is normal, the lips are closed without tension.

Displacement of the lateral teeth of the upper dentition on the right according to Engle class 2, on the left - Engle class 1. When analyzing the orthopantomogram, we determine the retention of the 13 tooth in the jaw and the mesial displacement of the teeth of the right upper segment is mesial. On the lower jaw - crowding of the front teeth and the vestibular location of 44 teeth with a lack of space in the dentition.

For the diagnosis, we used the proposed method of biometric orthodontic diagnosis on jaw models using the diagnostic line and diagnostic triangles ODA and OnDnAn, for example, for teeth 14, 15, 16, 17, 44 (Fig. 3). The results of the study of all teeth are shown in tables 1 and 2. Based on the analysis of the position of the teeth on the upper and lower dentition, a diagnosis was made: Grade 2 according to Engle. Retention 13 tooth. Mesial displacement of 14, 15, 16, 17 teeth. Crowding of the front teeth on the lower jaw (LF). The vestibular-mesial position of the 44 tooth. The lack of space in the dentition is 8 mm. Mesial tooth displacement 45, 46 47 - by 5-7 mm. Underdevelopment of the apical basis for LF - 1 degree.

Based on the obtained data, the main directions and the magnitude of the displacement of the abnormally located teeth on the HF and LF were planned, with the preferred displacement being the distalization of the teeth of the lateral segments on the right on the HF and LF. To create a place in the distal parts of the alveolar processes of the HF and LF, the removal of 18, 28, 38, 48 teeth is recommended. Orthodontic treatment was carried out using an arc technique of a “direct arc” on the dentitions of the HF and LF.

The period of active orthodontic tooth movement is 18 months.

Clinical observation: The beginning of orthodontic treatment - fixation of braces on 08/12/09. Control examination and models: 12/08/10, after 12 months.

To analyze the magnitude and direction of tooth movement in the lateral groups of HF and LF after 12 months of orthodontic treatment, we applied the proposed method of biometric orthodontic diagnosis on jaw models using diagnostic mid-sagittal N, transverse P through blind openings in the soft palate and diagnostic triangles ODA and OnDnAn. Measurements of the length of the legs of the diagnostic triangles were performed for all the teeth of the treble and bass. The legs of the triangles were designated by the abbreviations of the letters: OD11A11, OD12A12, OD13A13, OD14A14, etc. Since the position of the transverse P line on the jaw practically did not change during orthodontic treatment, the inequality of the legs of the triangles of the OA at different stages of treatment was an indicator of the displacement of certain teeth in a certain mesial, distal or complex directions. Evaluation of the obtained indicators of the direction and magnitude of the bias showed the adequacy of the results planned at the stages of diagnosis.

Changes in the biometric parameters of the dentition of patient R. after 12 months, identified using the proposed method for measuring diagnostic models Figure 4:

- on the upper jaw, a distal-vestibular displacement of 14, 15, 16, 17, 24, 25, 26, 27 teeth of the upper jaw was determined on models with orthodontically adjusted dentition, which is justified by an increase in the length of the leg OA14, OA15, OA16, OA17, OA24, OA25, OA26, OA27 of diagnostic triangles and reduction of the same legs YES of diagnostic triangles;

- the distal tooth displacement of the segment of 14-17 teeth on the upper jaw along the lines of YES was from 1.7 to 8.7 mm;

- the vestibular displacement of the teeth of the segment 14-17 on the upper jaw along the OA line was from 0.6 to 1.5 mm;

- the distal tooth displacement of the segment of 24-27 teeth in the upper jaw along the lines of YES ranged from 3.1 to 3.5 mm;

- the vestibular displacement of the teeth of the segment 24-27 in the upper jaw along the OA line was from 0.4 to 1.3 mm;

- teeth of the anterior segment on the upper jaw 11, 12, 21, 22, 23 are displaced mesio-vestibularly along the OA line - the vestibular displacement is from 0.1 to 1.5 mm, along the YES line - the mesial displacement is from 2.4 to 5.1 mm;

- teeth of the lower jaw 31, 32, 33, 34, 35, 36 and 43 teeth have mesio-vestibular movement along the OA line - vestibular movement from 0.2 to 1.8 mm, along the DA line - mesial displacement from 0.1 to 2.7 mm;

- 41 and 42 teeth moved distally by 0.2 mm and 1.6 mm, orally by 1.6 mm and 3.8 mm, respectively;

- 44 tooth moved distally by 8.2 mm, orally - by 0.8 mm;

- for 45.46 teeth, a disto-vestibular displacement along the OA line is characteristic - a vestibular displacement from 2.1 to 3.2 mm, along the DA line, a distal displacement from 5.1 to 6.7 mm.

Table 1 The parameters of the size of the legs of the diagnostic triangles of patient R. before treatment and after 12 months of orthodontic treatment FDI Tooth Abbreviation Catheters OA / YES before treatment, mm Catheters OA / YES after 12 months, mm eleven 6.7 / 44.7 6.8 / 41.8 12 13.3 / 37.4 13.0 / 42.5 13 retarded 16.5 / 35.6 fourteen 17.7 / 24.7 19.5 / 30.3 fifteen 21.0 / 14.9 20.7 / 23.6 16 25.5 / 15.7 24.9 / 13.4 17 27.0 / 7.2 26.1 / 5.5 21 7.6 / 44.8 7.3 / 42.0 22 14.5 / 42.7 13.0 / 39.1 23 19.2 / 34.3 18.6 / 36.7 24 21.5 / 27.0 22.8 / 30.4 25 24.4 / 21.5 24.0 / 25.0 26, 27.0 / 12.1 25.8 / 15.2 27 27.4 / 2.7 26.7 / 6.2 31 4.0 / 41.3 3.6 / 40.5 32 8.7 / 39.4 6.9 / 38.4 33 14.9 / 36.0 13.8 / 34.0 34 21.8 / 30.3 21.5 / 29.5 35 24.3 / 23.3 24.1 / 20.6 36 27.6 / 12.2 26.9 / 9.8 41 3.5 / 40.7 5.1 / 40.9 42 7.8 / 37.8 11.6 / 39.0 43 13.8 / 35.0 15.0 / 35.1 44 20.5 / 26.1 19.7 / 34.3 45 23.9 / 19.7 20.7 / 26.4 46 23.1 / 14.3 25.0 / 9.2

table 2 Parameters of tooth displacement of the upper and lower jaw during orthodontic treatment The studied tooth of the lateral segment of the HF The difference in the length of the leg YES after and before orthodontic treatment, mm The difference in the length of the leg OA before and after orthodontic treatment, mm Direction of tooth movement during orthodontic treatment eleven 2.9 0.1 mesio-vestibular 12 5.1 0.3 mesio-vestibular 13 - - fourteen -5.6 1,2 disto-vestular fifteen -8.7 1,5 disto-vestular 16 -2.3 0.6 disto-vestular 17 -1.7 0.9 disto-vestular 21 2,8 0.3 mesio-vestibular 22 3.6 1,5 mesio-vestibular 23 2,4 0.6 mesio-vestibular 24 -3.4 1.3 disto-vestular 25 -3.5 0.4 disto-vestular 26 -3.1 1,2 disto-vestular 27 -3.5 0.7 disto-vestular 31 0.8 0.4 mesio-vestibular 32 one 1.8 mesio-vestibular 33 2 1,1 mesio-vestibular 34 0.8 0.3 mesio-vestibular 35 2.7 0.2 mesio-vestibular 36 2,4 0.7 mesio-vestibular 41 -0.2 -1.6 disto-oral 42 -1.2 -3.8 disto-oral 43 0.1 1,2 mesio-vestibular 44 -8.2 -0.8 disto-oral 45 -6.7 3.2 disto-vestibular 46 -5.1 2.1 disto-vestibular

A variant of disocclusion as a complication was not identified. The tendency of the desire of all indicators to normal is determined, which corresponds to the high-quality treatment of the patient.

Thus, the proposed method when measuring before treatment allows you to determine the exact position and deviation of the position of the tooth on the jaw in the dentition, based on which to choose the direction and magnitude of the planned movement of each tooth on the jaw. When measuring during treatment, the method allows you to identify the direction and magnitude of the necessary correction of the movement of each tooth in the jaw to obtain the intended result. When measuring after treatment, the method allows to ascertain the magnitude and direction of the displaced segments of the dentition and individual teeth and to assess the quality of the orthodontic treatment.

Claims (1)

Method of biometric orthodontic diagnosis on jaw models, including casting, casting of gypsum diagnostic models, applying a transverse diagnostic line, a base point and points on the tooth surface to a gypsum diagnostic model of the upper jaw, connecting points with lines, measuring the length of lines, projecting a base point and a transverse diagnostic lines on the gypsum diagnostic model of the lower jaw, drawing points on the surface of the teeth, connecting the points with lines, measuring the length of the lines, distinguish in that the transverse line P is drawn through the blind openings of the soft palate perpendicular to the median palatine suture N, at the middle of the distance between the blind openings on the line P, the base point O is applied, connect it to the middle of the distal approximate surface of the tooth under study - point D, from point D is omitted perpendicular to the line P and at the intersection put point A, get a diagnostic triangle ODA, on the plaster model of the lower jaw from the projection of the base point He draws a line to the middle of the distal approximate the teeth of the examined tooth Dn, lower the perpendicular to the line Mon and put the point An at the intersection, get the diagnostic triangle OnDnAn, measure the sides of the triangles, compare the length of the legs OA, DA, OnAn, DnAn before, during and after orthodontic treatment, and with increasing length catheter OA, OnAn diagnose a vestibular displacement of the tooth, with a decrease in the length of the cathete OA, OnAn diagnose an oral displacement of the tooth, with an increase in the length of the leg YES, DnAn diagnose a mesial displacement of the tooth, with a decrease in the length of the leg YES, Dn they diagnose a distal tooth displacement, with an increase in the length of the catheter OA, OnAn and an increase in the leg catheter, DnAn diagnose a mesio-vestibular displacement, with an increase in the length of the catheter OA, OnAn and a decrease in the leg catheter, DnAn diagnose a disto-vestibular displacement of the tooth, with a decrease in the length of the leg OA , OnAn and an increase in the catheter of YES, DnAn diagnose a mesioral tooth displacement, with a decrease in the length of the catheter OA, OnAn and a decrease in the catheter of DA, DnAn diagnose a distal-oral tooth displacement.

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