The study of frequency and variability of third molars positions in panoramic radiographs at the radiology service of the School of Dentistry of the Federal University of Minas Gerais
DOI:
https://doi.org/10.7308/aodontol/2018.54.e01Keywords:
Molar, third, Radiography, panoramic, RadiologyAbstract
Aim: This article seeks to describe the epidemiological profile of the variation and frequency of the positioning of third molars of patients who received dental care at the Radiology Department of the School of Dentistry of the Federal University of Minas Gerais (UFMG) from September 2014 to September 2015. The overall aim is to improve the knowledge of dental surgeons for better surgical planning.
Methods: This study selected 469 radiographs that had at least one third molar. These radiographs were classified according to the position of the third molars in relation to the occlusal plane, to the axis of the second molar, to the ascending mandibular ramus, and to the mandibular canal.
Results: Among the 469 radiographs analyzed in this study, 62.7% were female patients and 37.3% were male. It was possible to observe the presence of teeth 18 (370), 28 (369), 38 (341), and 48 (363), which resulted in study sample of 1,443 third molars. Most of the mandibular third molars were found in the vertical position, followed by the mesioangular position and the horizontal position. Class II was the most frequent, followed by class I and class III. Moreover, most of the mandibular third molars were found in position A, followed by position B and position C. The most commonly observed radiographic sign was the obscuration of the roots.
Conclusion: It was possible to observe the frequency of positions of the mandibular third molars through the analysis of panoramic radiographs performed at the radiology service of the Radiology Department of the UFMG School of Dentistry. The dental surgeon’s knowledge of the positions and classifications of third molars in panoramic radiographs can aid in reaching an appropriate diagnosis and proper surgical planning.
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