Method of detecting anomalies of dentition and device for its implementation

 

(57) Abstract:

The invention relates to medicine, namely to dentistry. The way is to study models of the jaws, install them in habitual occlusion and subsequent determination of the pattern of deviations of the position of the teeth. The template is set to put on it tangents were aligned with the tangent to the needy or lowest sagittal offset of the teeth model, cant it in accordance with the inclination of the occlusal plane of the patient, using a template with the same model total width of three front teeth, the models produce a permutation of the teeth or groups of teeth in the correct position, control the pattern accuracy of adjustment, after which the models are made medical device. The device is block mounting template and its design. The method provides a more accurate way. 2 S. and 4 C.p. f-crystals, 5 Il.

The invention relates to the field of medicine and more to orthodontics.

In the treatment of anomalies of dentition first need to diagnose their deviation from the norm. A known method for the diagnosis of anomalies of dentition, consisting in the study of the model is s, Herne, 1992 - S. 3.1-33). This method is not possible with sufficient accuracy and reliability to detect the deviation of the shape of the dentition from the norm and, accordingly, to carry out the necessary treatment.

It is also known a device for diagnosing anomalies of dentition, representing the articulator containing the base and the top and bottom shelves with caps (see ibid., S. 34-37, 48-50). A disadvantage of this device is the inability to install the template, allowing to determine the deviation of the position of the teeth and form dentitions from the norm.

Closest to the present invention is a method for the diagnosis of anomalies of dentition and device for its implementation by the patent RF N 2098042 IPC A 61 C 7/00 adopted as a prototype. The diagnostic method according to the invention consists in the installation of the models in an open position and a subsequent determination of the pattern printed on it lines the normal position of the teeth of the deviations of the position of the teeth and forms dentitions from the norm. A device for implementing the method according to this patent comprises a base installed on it the bottom shelf and racks, on which hinged the top shelf. The method according to the patent N 2098042 allows about who provides only the diagnosis of abnormality of each of the teeth separately and does not allow to control the occlusal relationships. The device for implementing the method is not suitable in the dental laboratory for the permutation of the teeth in the correct position, because the access to the models without removing the template from the device. Thus, the diagnostic results can not be directly used for the manufacture of dental treatment apparatus positioner.

The objective of the invention is to improve the accuracy and reliability of diagnosis of anomalies of dentition, enabling correction of anomalies in the models directly to the device manufacturer model corrective medical devices - positioners.

To solve these problems, the proposed method of treatment of anomalies of dentition in the diagnosis of anomalies in the template, which determines the deviation of the position of the teeth and form dentitions from the norm, is set to put on it tangent to the surfaces were aligned with the tangent to no or lowest sagittal offset of the teeth model, and tilt it relative to the transversal and vertical planes in accordance with the inclination of the occlusal plane of the patient, using the template on which summarise the which model produces a permutation of the teeth or groups of teeth in the correct position, using the template control the accuracy of the adjustments and the adjusted models produce medical dental staff positioner.

Adjustment of the position of the teeth on the model of the upper jaw can be produced as the template and revised model of the lower jaw of the patient.

Due to the fact that the lines drawn on the template, combine tangent to a properly located in the sagittal direction of the teeth and tilt it, combining with the occlusal plane, the deflection of the teeth are clearly visible, making the diagnosis the doctor and make the task of moving teeth on the model of the dental technician.

The device for implementing the method, in contrast to known with block mounting template mounted on the front arc, to install it in the device on the rack latter is provided boarding stud; a mount unit is a three-tier articulated rod mechanism, the first upright rod which is rigidly secured to the cross member of the front arc, a second terminal connected to the third bearing on the end for the in the form of a clamping bushing, installed slidable along the rods at the first vertical rod mounted ring-lock block position. On the front crossmember of the arc in the opposite direction of the vertical rod holder block template, set the core emphasis.

The proposed device, in comparison with known, easier to use, provides easy access to the models, the possibility of monitoring the accuracy produced by the model moves.

In Fig. 1 shows the proposed device, the General view in axonometric projection off the face bow; Fig. 2 is a view of the device in axonometric projection is removed from the top shelf of Fig. 3 is a view of the device sideways off the top shelf and laid back front arc; Fig. 4 - unit mounting template, Fig. 5 - core emphasis.

The device comprises a base 1 with the lower shelf 2, the uprights 3 and fixed to the axis 4 of the upper shelf 5. On the shelves provided by the caps 6 and 7 for mounting models. On the racks 3 are boarding stud 8 for the front arc 9. On the cross member 10 of the front arc has unit mounting template 11. The block contains the rods 12, 13 and 14 associated with split sleeves 15, is tableno movable along the ring 22 - the limiter move the rod 12 of the sleeve 15 with the rod 13, provided with a fixing screw 23. On the cross member 10 of the front arc has a core focus 24 intended to limit rotation of the front arc 9 when it overturns.

The proposed method is carried out using the proposed device in the following sequence: models 25 and 26 using a face-bow 9 is transferred into the device and sagopafeat on pedestals 6 and 7. Then with a face-bow 9 remove the bite fork with fasteners and install it block mounting template and core focus 24.

Then remove from axis 4 top shelf 5. Choose from a set of templates corresponding to the sum of the width 3 of the front teeth to the sum of the width of these teeth model and fix it in the clamp 21. With the sleeves 15, 16 and 17 installing the template 11 so that the correctly positioned on sagittal the teeth were aligned with the corresponding teeth of the model of the lower jaw and tilt it to match occlusal surface. The dentist or dental technician is assessed according to the identified pattern, the severity of the anomaly. Then the technician starts to reposition teeth. To provide access to models assign the front arc of NCU produced each permutation of the front arc is turned in the opposite direction and return the pattern to its original position.

For permutations of the teeth on the model of the upper jaw of the upper shelf 5 with the upper jaw model is fixed in the device tilted in a horizontal position where it is retained by the supporting pin 27. Face-bow 9 is removed, flipped and re-installed on the studs 8. Block mounting template mounted on the upper surface of the front arc 9, and a rod stop 24 from below. The template selected in the same way as described for the lower jaw, mounted in the clamp 21 and is fixed with the help of unit mounts the same way as described for the model of the mandible. The height of the sleeve 15 is fixed using a locking ring 22. In order to release the working field, the clamp 18 loosen the fastening sleeve 15 and the template is taken off to the side. Its vertical position is held together by a retaining ring 22. If necessary, control the pattern returns to its original position. When the initial setting of the template, you must set the rod 14 strictly in the midline of the articulator.

Repositioning of the teeth on the model of the upper jaw in adjusted lower model performed well, achieving a harmonious, correct occlusal contacts.

On corrected Mr> The patient Morozov A., age 9, history N 651.

Arrived for treatment in the clinic of the Department of orthodontics and child dental prosthetics MMSI January 12, 1998

After clinical examination was diagnosed with deep Burin disocclusion, sagittal slit 6 mm, protrusion of the upper incisors and lower jaws, diastema, three in the frontal areas of the upper and lower jaws, shortening frenula, infantile type of swallowing.

In the anthropometric study models the following data were obtained:

The total dimensions = 31,2

The width of the dental arches:

in the field = 35,8 rate of 36.5

in the field = 46,5 rate of 47.5

in the field = 36,0 rate of 36.5

in the field = 47,0 rate of 47.5

The length of the anterior segment of the dentition:

for a/h = 21,5 norm 18

at h/h = 19.0 norm 16

The width of the apical bases:

in/h = 42,0 norm 41,3

h/h = 36,0 rate of 35.2

The length of the apical bases:

in/h = 37.5 norm 36,6

h/h = 37,0 norm 37,0

Amount = 22,6

After radiographic examination and computer decrypting the TWG head in lateral projection obtained the following results:

the movement of the upper molars in the sagittal plane is missing (Uppet 6 to PtV - 12,8);

PR):

dental-alveolar shortening in the field - Upper 1 to NL - 24,2 (norm 27,5):

dental-alveolar elongation in the area - Lower 1 to ML - 43,1 (rate of 40.8).

Then working a couple of models has been transferred to the device with the aforementioned method using a face-bow transfer FAG (France). Based on the amount (22,6), was selected as a transparent template. Since the sagittal offset is absent, their position on the model can be taken as a guide for fixing the template to the device. The template is set so that caused it tangent to the first molars was mapped to the tangent to the first molars and the plaster model and fixed with a clip template. The plane of the template as possible matched with the occlusal surface. The template is imposed on the model can demonstrate the deviation of the shape of the patient's dentition from the ideal shape of the dentition and calculate the severity of the anomalies.

The examined patient after conducting the diagnostic measurement device, the following data were obtained:

the alignment of the U-shaped due to the elongation in the frontal departments:

- the length of the anterior segment of the upper dentition is I canines in the sagittal plane is not found:

- oral slope of lateral teeth/h and n/h (offset buccal cusps in the oral side of the 0.8 mm);

- dental-alveolar shortening in the anterior upper dentition 3 mm;

- dental-alveolar extension in the anterior lower dentition of 2.5 mm

As a result of our research was diagnosed with lengthening of teeth, deep blade disocclusion, protrusion of the upper incisors and lower jaws, dental-alveolar shortening of the upper anterior teeth and the tooth-alveolar lengthening in the lower anterior teeth.

Thus, our proposed method and device for its implementation allows researchers to simultaneously examine and evaluate the position of individual teeth or groups of teeth relative to the ideal form of the dentition, the alignment in three dimensions and allows in some cases to refuse to conduct anthropometric research models.

1. Method of detecting anomalies of dentition by studying models of the jaws, install them in occlusion and subsequent determination of the pattern printed on it tangent to the tooth surface, corresponding to their normal position, the deviations progeam tangents were aligned with the tangent to the needy or lowest sagittal offset of the teeth model and tilt it relative to the transversal and vertical planes in accordance with the inclination of the occlusal plane of the patient, use the template on which the total width of the 1st, 2nd and 3rd teeth corresponds to the total width of these teeth on the model.

2. The method according to p. 1, characterized in that the model produces a permutation of the teeth or groups of teeth in the correct position, using the template control the accuracy of the adjustment.

3. The method according to PP. 1 and 2, characterized in that the adjustment of the position of the teeth on the model of the upper jaw spend on a template.

4. The method according to PP. 1 and 2, characterized in that the adjustment of the position of the teeth on the model of the upper jaw carried out on the corrected model of the lower jaw.

5. A device for implementing the method according to PP. 1 and 2, containing a base with a fixed bottom shelf and racks, on which hinged the top shelf template and the front arc, characterized in that it is provided with a unit mounting template mounted on the face bow mounted on mounting pins in the rack, mount unit made in the form of three articulated rod mechanism, the first upright rod which is rigidly secured to the cross member of the front arc, a second terminal connected to the third bearing at the end of the clamping plug the children of the clamping bushings installed slidable along the rods at the first vertical rod mounted ring-lock position of the block.

6. The device under item 5, characterized in that it is provided with a rod-rotation limiter front arc made with the possibility of installation on an arc in the opposite direction of the vertical rod holder block template.

 

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