MODERN APPROACHES TO THE DETERMINATION OF THE ANGLE OF TEETH INCLINATION IN THE DIAGNOSIS AND PLANNING OF ORTHODONTIC TREATMENT

Aim. To conduct a comparative analysis of existing methods for measuring the angles of inclination of tooth and determining the torque of teeth with orthognathic occlusion.

Materials and methods. Inclination angles were measured in 137 patients with physiological occlusion and the standard values of the torques of permanent teeth. Four methods of investigation were used to measure tooth torques. In the first method, the angle of the inclination formed by the occlusal plane and the conditional middle vertical of the tooth was measured by the protractor on the incisions of the plaster models of the dentition rows. The second method, which allows evaluating torques and teeth angulation at the same time, was carried out with the aid of the «Arco-zet» apparatus of «Scheu Dental GmbH». As the third method of research, the technique of analyzing images of cone-beam computed tomography was used, on which linear and angular reference points were applied. The fourth method of investigation was based on the results of scanning gypsum models with a laser scanner "ORAPIX" with the subsequent creation of a digital three-dimensional image and the formation of a virtual Set-Up model in the file "ORAPIX" 3Txer 2.5.0.

Results. All methods of measuring the angles of teeth in the vestibular-lingual direction can be applied both in the applied and in the clinical aspect. Determining the torques of permanent teeth using the morphometry of gypsum models of dentition and instrumentation method is characterized by laboriousness, length of studies, and also the presence of errors in measurements. Methods for analyzing images of cone-beam computed tomography and using the virtual diagnostic SetUp model in the ORAPIX file 3Txer 2.5.0 are high-tech, precise, and reproducibility and interpretation of the results allows using the available angular and linear parameters for assessing the effectiveness of conducted orthodontic activities at all stages of treatment.

Conclusion. The introduction into clinical orthodontics derived from research boundaries reference values and confidence intervals inclination angles of the upper teeth, the lower jaw, as well as tilt incline of teeth of antagonists will reduce the time required for the early stage diagnosis and increase the effectiveness of the test results of orthodontic treatment. Improvement of existing methods of diagnosis of dentoalveolar anomalies has led to the creation of high-tech, precision, computerized measurement methods, the introduction of which will allow not only minimizing errors associated with instrumental measurement techniques in the structures of the maxillofacial region, but, due to the predictability of orthodontic treatment, achieving optimal functional – aesthetic results.

1. Anikienko A.A., Pankratova N.V., Persin L.S., Yanushevich O.O. System approach in studying interrelations between morphological structures of face and skull − ways of broadening understanding of specialization «orthodontia». Fundamental orthodontia: Monografiya. Moscow: Ofort; 2014. 201 р. (In Russ.).

2. Tokarevich I.V., Kipkaeva L.V., Korkhova N.V. General orthodontia: study guide. Minsk: BGMU; 2010. 108 р. (In Russ.).

3. Mitchell L. An Introduction to Orthodontics. Oxford: Oxford University Press; 2001. 227 р.

4. Khoroshilkina F.Ya. Defects of teeth, dental arcades, anomaly of occlusion, myofunctional disorders in maxillofacial area and their complex treatment. Moscow: Medinform; 2006. 544 p. (In Russ.).

5. Domenyuk D.A., Vedeshina E.G., Dmitrienko S.V. Modern approach to patient recording in an orthodontic clinic. Stavropol: Stavropolskii Gos.Univ.; 2015. 135 p. (In Russ.).

6. Persin L.S., Slabkovskaya A.B., Karton E.A., Drobysheva N.S., Popova I.V., Tekucheva S.V., Ilyushina A.S., Porokhin A.Yu., Rizhinashvili N.Z., Rybakova M.G., Seleznev A.V., Vagapov Z.I., Egiazaryan A.L., Kovalenko A.V. Orthodontia. Modern methods to diagnose anomalies of teeth, dental arcades, and occlusions: Study guide. Moscow: OOO "GEOTAR-Media"; 2017. 160 р. (In Russ.).

7. Domenyuk D.A., Ilidzhev D.M., Budaichiev G.M., Vedeshina E.G., Dmitrienko S.V. Optimization of diagnostics and planning of orthodontic treatment of patients with dentofacial anomalies based on the results of morphometric studies of the anterior dental arch. Kubanskij nauchnyj medicinskij vestnik. 2017; 5: 14-21. (In Russ., English abstract). DOI: 10.25207/1608-62282017-24-5-14-21.

8. Domenyuk D.A., Korobkeev A.A., Vedeshina E.G., Dmitrienko S.V. X-Ray and morphometric methods in assessing kefal-odontologic status of patients with formed orthodontic occlusion of permanent teeth. Stavropol: Stavropolskii Gos.Univ.; 2015. 76 p. (In Russ.).

9. Andrews L.F. The six keys to normal occlusion. Am J Orthod Dentofacial Orthop. 1972; 62(3): 296-309.

10. Proffit W.R. Contemporary orthodontic. St. Louis, Baltimor, Boston: Mosby Year Book; 2007. 751 p.

11. Khoroshilkina F.Ya. Orthodontia. Moscow: Medinform; 2008. 541 p. (In Russ.).

12. Davydov B.N., Dmitrienko S.V., Vedeshina E.G., Domenyuk D.A. Features of tactics and principles of orthodontic treatment of patients with dental arches asymmetry caused by different amounts of antimeres (Part I). The Dental Institute. 2017; 77(4): 64-68. (In Russ.).

13. Korobkeev A.A., Tsaturyan L.D., Vedeshina E.G., Dmitrienko S.V., Domenyuk D.A. Peculiarities of maxillofacial area in macrodentism of permanent teeth. Stavropol: Stavropolskii Gos. Univ.; 2016. 159 p. (In Russ.).

14. Domenyuk D.A., Dmitrienko S.V., Vedeshina E.G., Risovanny S.I., Porfiriadis M.P., Budaychiev G.M. Methods of biometrical diagnostics in transversal direction in patients with mesognathic type of dental arches. Kubanskij nauchnyj medicinskij vestnik. 2017; 6: 26-34. (In Russ., English abstract). DOI: 10.25207/1608-6228-2017-24-6-26-34.

15. Bimbas E.S., Bulatova S.R., Myagkova N.V. Diagnostics of dentofacial anomalies: study guide. Yekaterinburg: UGMU; 2014. 62 р. (In Russ.).

16. Vedeshina E.G., Domenyuk D.A., Dmitrienko S.V. Determining torque and angulation of permanent teeth in cases of brachygnatic dental arches depending on dentition type. Kubanskij nauchnyj medicinskij vestnik. 2015; 6: 23-30. (In Russ., English abstract). DOI: 10.25207/16086228-2015-6-23-30.

17. Davydov B.N., Dmitrienko S.V., Vedeshina E.G., Domenyuk D.A. Complex assessment of physiological occlusion of permanent teeth in people with different gnathic, dental types of face and dental arches. Medical alphabet. 2017; 24(3): 51-55. (In Russ.).

18. Vedeshina E.G., Domenyuk D.A., Dmitrienko S.V. Anatomic features of inclination and angulation of permanent teeth in case of different mesognathic dental arches. Kubanskij nauchnyj medicinskij vestnik. 2016; 1: 16-23. (In Russ., English abstract). DOI: 10.25207/16086228-2016-1-16-23.

19. Netzel F., Schultz K. Practical guide for orthodontic diagnostics. Analysis and diagrams for using in practice. Lviv, 2006. 175 р. (In Russ.).

20. Domenyuk D.A., Vedeshina E.G., Dmitrienko S.V. Special features of dolichognathic dental arches in people with teeth size variations. Kubanskij nauchnyj medicinskij vestnik. 2016; 1: 39-46. (In Russ., English abstract). DOI: 10.25207/1608-6228-2016-1-39-46.

21. Rakosh T., Graber T.M. Dento-alveolar and maxillofacial orthodontic treatment. Lviv, GalDent; 2012. 423 p. (In Russ.).

22. Domenyuk D.A., Vedeshina E.G., Dmitrienko S.V. Anatomic and topographic rationale for dental arch constructing and measuring methods. Kubanskij nauchnyj medicinskij vestnik. 2015; 3: 31-37. (In Russ., English abstract). DOI: 10.25207/16086228-2015-3-31-377.

23. Domenyuk D.A., Shkarin V.V., Porfiriadis M.P., Dmitrienko D.S., Dmitrienko S.V. Setting reference points for key teeth location in cases of abnormal dental arch shape. Archiv EuroMedica. 2017; 7(2): 111-117.

24. Davydov B.N., Dmitrienko S.V., Domenyuk D.A., Porfiriadis M.P. Results of integrated estimation of the functional state of the dentistry system in patients with physiological occlusion of tooth rows (Part I). The Dental Institute. 2017; 77(4): 78-82. (In Russ.).

25. Domenyuk D.A., Korobkeev А.А., Lepilin A.V. Methods to determine individual size of dental arches according to morphometric parameters of maxillofacial area. Stavropol: Stavropolskii Gos.Univ.; 2015. 144 p. (In Russ.).

26. Vedeshina E.G., Domenyuk D.A., Dmitrienko S.V. Correlation between shapes and sizes of dentofacial arches and their stable parameters. Kubanskij nauchnyj medicinskij vestnik. 2016; 3: 33-38. (In Russ., English abstract). DOI: 10.25207/1608-6228-2016-3-33-38.

27. Davydov B.N., Dmitrienko S.V., Vedeshina E.G., Domenyuk D.A. Sagittal and transversal dimensions of dolichognathic dental arches in humans with macrodontia, microdontia, and normodontia. The Dental Institute. 2016; 71(2): 60-63. (In Russ.).

28. Domenyuk D.A., Vedeshina E.G. Morphometric parameters of brachygnathic dental arches considering size of permanent teeth. Kubanskij nauchnyj medicinskij vestnik. 2015; 6: 47-53. (In Russ., English abstract). DOI: 10.25207/1608-6228-2015-6-47-53.

29. Domenyuk D.A., Shkarin V.V., Porfiriadis M.P., Dmitrienko D.S., Dmitrienko S.V. Algorithm for forecasting the shape and size of dental arches front part in case of their deformations and anomalies. Archiv EuroMedica. 2017; 7(2): 105-110.

30. Domenyuk D.A., Davydov B.N., Vedeshina E.G., Dmitrienko S.V. Biometric justification of main linear dimensions of the dental arches in orthodontic treatment tactics’ development using edgewise orthodontic technique (Part II). The Dental Institute. 2016; 71(2): 66-67. (In Russ.).