Dentist № 4 (47) – 2022, pp. 14-19                                                                                                                    SCIENTIFIC PUBLICATION

Determination of the eruption of the lower third molar relative to the “stress axis”

S.P. Rubnikovicha, A.A. Khasbolatovab, N.V. Pankratovac, Yu.L. Denisovaa, M.A. Postnikovd, E.M. Postnikovab, A.A. Rodionovab

aMD, PhD, DMSci, Professor, Belarusian State Medical University, Minsk, Belarus
bA.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
cMD, PhD, Associate Professor, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, Moscow, Russia
dMD, PhD, DMSci, Professor, Samara state medical University, Samara, Russia

https://doi.org/10.32993/dentist.2022.4(47).5

ABSTRACT
The article discusses the issue of the important problem of the presence and location of the primordia of third molars and the possibility of their eruption without affecting the dental system. The problem is relevant and is being studied by domestic and foreign specialists from different angles and using various diagnostic techniques. This article is based on the analysis of the most accessible and most frequently used X-ray diagnostic method – panoramic X-ray.
The aim of the study. The aim was to study the prognosis of eruption of the lower third molars, depending on their position relative to the “stress axis”.
Objects and methods. 84 panoramic images of patients 12–25 years old were analyzed. To study the OPTG, the method of Fishchev et al. (2012) was applied, which determines the position of the third lower molars relative to the “stress axis”, as well as a modification of the method by Demirjian (1973) to determine the stage of their formation. The data were processed statistically.
Results and discussion. The results are presented in tables and diagrams, as well as correlations, and a discussion of their interpretation is held.
Conclusion. These data allowed us to draw conclusions about a significant change in only the angle of inclination and the stages of formation of the roots of the third molars of the lower jaw, 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 prognosis of their eruption.

Keywords: position of the third lower molars, panoramic image of jaws, “stress axis”, correlations

References

  1. Dmitrienko D.S. [et.al.] Osobennosti raspolozhenija tret’ih moljarov na nizhnej cheljusti pri fiziologicheskoj okkljuzii postojannyh zubov [Features of the location of the third molars on the lower jaw with physiological occlusion of permanent teeth]. In-t stomatologii. – Institute of Dentistry. 2011, no. 4 (53), pp. 50-51.
  2. Karpov A.N., Postnikov M.A., Stepanov G.V. Ortodontija: ucheb. posobie [Orthodontics: textbook. Allowance]. Samara: Pravo, 2020. 319 p.
  3. Persina L.S. Ortodontija. Nacional’noe rukovodstvo: v 2 t. T. 2: Lechenie zubocheljustnyh anomalij [Orthodontics. National guide: in 2 vols. Vol. 2: Treatment of dentoalveolar anomalies ed. L.S. Persina]. M.: GJeOTAR-Media, 2020. 376 p.
  4. Postnikov M.A. [et.al.] Kliniko-rentgenologicheskie metody diagnostiki v stomatologii: ucheb. posobie [Clinical and radiological diagnostic methods in dentistry: textbook. Allowance]. FGBOU VO SamGMU Minzdrava Rossii. Samara: Pravo, 2021. 141 p.
  5. Slabkovskaja A.B., Grishina E.B., Chuprova O.A. Opredelenie pozicii moljarov po dannym ortopantomografii [Determining the position of molars according to orthopantomography]. Ortodent-Info. 2001, no. 2, 37 p.
  6. Rubnikovich S.P. [et al.] Regenerative cell technologies for gingival recession treatment. Modern Technol. Med., 2018, vol. 10, no. 4, pp. 94-104, doi: https://doi.org/10.17691/stm2018.10.4.11
  7. Anikienko A.A., Pankratova N.V., Persin L.S. Apparaturnoe ortodonticheskoe lechenie i ego podchinenie fiziologicheskim zakonam razdrazhenija Apparatus orthodontic treatment and its subordination to the physiological laws of irritation]. M.: MIA, 2010. 112 p.
  8. Pankratova N.V. [et.al.] Polozhenie tret’ih moljarov u pacientov ot 7 do 25 let so skuchennost’ju gruppy perednih zubov [The position of the third molars in patients from 7 to 25 years old with crowding of the group of anterior teeth]. Ortodontija. – Orthodontics. 2016, no. 4, pp. 8-13.
  9. Pankratova N.V. [et. al.] Opredelenie stadii rosta i razvitija organizma [Determination of the stage of growth and development of the organism]. Samara: OFORT, 2016. 38 p.
  10. Rubnikovich S.P., Khomich I.S., Denisova Yu.L. Morphological changes in bone tissue around dental implants after low-intensity ultrasound applications. Bulletin of the National acad. Sciences of Belarus. A series of medical Sciences, 2020, vol. 17, no. 1, pp. 20-27.
  11. Rubnikovich S.P. [et al.] The effect of magnetophototherapy on morphological changes of tissues of pathologically changed periodontium. Med. News North Caucasus.,2017, vol. 12, no. 3, pp. 303-307, doi: https://doi.org/10.14300/mnnc.2017.12095
  12. Rubnikovich S.P., Denisova Yu.L., Fomin N.A. Digital laser speckle technologies in measuring blood flow in biotissues and the stressed-strained state of the maxillodental system. J. Eng. Phys. Thermophys., 2017, vol. 90, no. 6, pp. 1513-1523, doi: https://doi.org/10.1007/s10891-017-1713-8
  13. Denisova Yu.L. [et al.] Laser speckle technology in stomatology. Diagnostics of stresses and strains of hard biotissues and orthodontic and orthopedic structures. J. Eng. Phys. Thermophys., 2013, vol. 86, no. 4, pp. 940-951, doi: https://doi.org/10.1007/s10891-013-0915-y
  14. Bazylev N.B., Rubnikovich S.P. Investigation of the stressed-strained state of cermet dentures using digital laser speckle-photographic analysis. J. Eng. Phys. Thermophys., 2009, vol. 82, no. 4, pp. 789-793, doi: https://doi.org/10.1007/s10891-009-0247-0
  15. Fomin N. [et al.] Laser monitor for soft and hard biotissue analysis using dynamic speckle photography. J. Laser Phys., 2003, vol. 13, no. 5, pp. 786-795.
  16. Demirjian A., Goldstein H., Tanner J.M. A new system of dentalage assessment. Hum. Biol., 1973, vol. 45, no. 2, pp. 211-227.
  17. Demirjian A. [et al.] Interrelationships among measures of somatic, skeletal, dental and sexual maturity. Am. J. Orthod., 1985, vol. 88, no. 5, pp. 433- 438, doi: https://doi.org/10.1016/0002-9416(85)90070-3

Correspondence to:  Е-mail: rubnikovichs@mail.ru