Prediction of eruption of the lower third molars depending on their position relative to the “stress axis”

Author:

Khasbolatova A. A.1ORCID,Pankratova N. V.1ORCID,Postnikov M. A.2ORCID,Rubnikovich S. P.3ORCID,Repina T. V.1ORCID,Kolesov M. A.1ORCID,Denisova Yu. L.3ORCID,Morozova K. M.1ORCID

Affiliation:

1. A. I. Yevdokimov Moscow State University of Medicine and Dentistry

2. Samara State Medical University

3. Belarusian State Medical University

Abstract

The article discusses the important problem of the presence and location of the primordia of third molars and the possibility of their eruption without affecting the dentition. The problem is relevant and is being studied by domestic and foreign specialists from different angles with the use of various diagnostic techniques. This article is based on the analysis of the most accessible and most frequently used X-ray diagnostic method – the panoramic X-ray.The aim was to study the prediction of eruption of the lower third molars depending on their position relative to the “stress axis”.84 panoramic images of the patients aged 12‒25 years were analyzed. To study the OPTG, the method of Fishchev et al. (2012), which determines the position of the lower third molars relative to the “stress axis”, and Demirjian’s modified method (1973), which determines the stage of their formation, were used. The data were processed statistically.The results are presented in tables and diagrams, as well as in correlations. Their interpretation is discussed. These data allowed us to draw conclusions about a significant change only in the angle of inclination and the stages of formation of the roots of the third molars of the lower jaw, about the absence of changes in the gonial angle and the position of the studied teeth with age. At the same time, it was found that the location of the coronal part of the third molars below the “stress axis” does not worsen the prediction of their eruption.

Publisher

Publishing House Belorusskaya Nauka

Subject

General Medicine

Reference21 articles.

1. Dmitrienko D. S., Fishchev S. B., Sevast’yanov A. V., Fomenko I. V., Egorova A. V., Berdin V. V., Rtishcheva S. S. Peculiarity disposition of third permanent molars on mandibula from normal occlusion permanent. Institut stomatologii [Institute of dentistry], 2011, no. 4 (53), pp. 50‒51 (in Russian).

2. Karpov A. N., Postnikov M. A., Stepanov G. V. Orthodontics: study guide. Samara, Pravo Publ., 2020. 319 p. (in Russian).

3. Persin L. S. (ed.). Orthodontics. National leadership. Vol. 2. Treatment of dentoalveolar anomalies. Moscow, GEOTAR-Media Publ., 2020. 376 p. (in Russian).

4. Postnikov M. A., Trunin D. A., Pankratova N. V., Slesarev O. V. Clinical and radiological diagnostic methods in dentistry: a tutorial. Samara, Pravo Publ., 2021. 141 p. (in Russian).

5. Slabkovskaya A. B., Grishina E. B., Chuprova O. A. Determination of the position of molars according to orthopantomography data. Ortodent-Info [Ortodent-Info], 2001, no. 2, p. 37 (in Russian).

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