DOI:

10.37988/1811-153X_2023_2_118

Landmarks for evaluation of third molar position in accordance with age

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Authors

  • M.A. Postnikov 1, PhD in Medical Sciences, associate professor and head of the Therapeutic dentistry Department, head of the Therapeutic dentistry Clinic
    ORCID ID: 0000-0002-2232-8870
  • N.V. Pankratova 2, PhD in Medical Sciences, associate professor of the Orthodontics Department
    ORCID ID: 0000-0002-0672-1381
  • A.A. Hasbolatova 2, postgraduate at the Orthodontics Department
    ORCID ID: 0000-0001-6958-8920
  • Z.H. Yakubova 3, PhD in Medical Sciences, associate professor of the Pediatric dentistry and orthodontics Department
    ORCID ID: 0000-0001-6427-7680
  • A.A. Rodionova 2, senior laboratory technician at the Orthodontics Department
    ORCID ID: 0000-0002-8325-9602
  • E.M. Postnikova 4, dental assistant
    ORCID ID: 0000-0002-5989-1704
  • M.R. Sagirov 1, PhD in Medical Sciences, assistant professor of the Prosthetic dentistry Department
    ORCID ID: 0000-0002-2782-4689
  • 1 Samara State Medical University, 443099, Samara, Russia
  • 2 Moscow State University of Medicine and Dentistry, 127473, Moscow, Russia
  • 3 Avicenna Tajik State Medical University, 734003, Dushanbe, Tajikistan
  • 4 Dr. Postnikov Multidisciplinary Clinic, 443083, Samara, Russia

Abstract

The aim of the study is to analyze the conditionality of changes in the position of the third molars (TM) with age.
Materials and methods.
More than 3000 orthopantomograms (OPTG) of the jaws of patients aged 7 to 25 years with various anomalies of the maxillary system were analyzed: crowded position of teeth, narrowing of dentition, mesial and distal occlusion. The stages of TM formation, their angle of inclination and their location relative to the bisector of the gonial angle and buttresses of the upper and lower jaws were studied.
Results.
Buttresses on the upper jaw are arranged vertically and do not prevent proper teething. If the distance from the buttress to the rudiment of the lower TM is more than 2.0 mm and the angle of inclination is more than 70°, its eruption is possible, and if there is no distance and the angle of inclination is less than 70°, it is advisable to remove these teeth (patent No. 2778775, effective from 12.28.2020). The distance from the crowns of the lower TM relative to the bisector of the gonial angle and the angle of inclination of the molars decrease with age.
Conclusion.
The analysis of correlations between the OPTG parameters of the jaw showed a significant relationship between such indicators as age, the position of the third molars, the angle of inclination of the third molars, the value of the gonial angle and the stage of formation of molar roots.

Key words:

third molars, frequency of propagation, position, stages of formation, orthopantomogram of the jaws, buttresses of the jaws, stress axis of the gonial angle

For Citation

[1]
Postnikov M.A., Pankratova N.V., Hasbolatova A.A., Yakubova Z.H., Rodionova A.A., Postnikova E.M., Sagirov M.R. Landmarks for evaluation of third molar position in accordance with age. Clinical Dentistry (Russia).  2023; 26 (2): 118—125. DOI: 10.37988/1811-153X_2023_2_118

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Received

March 1, 2023

Accepted

June 15, 2023

Published on

July 6, 2023