Abstract
Objective: The aim of the study was to evaluate the frequency of distal caries in the second molar influenced by the angulation of the third molar adjacent on panoramic radiographs in a clinical dental radiology. Material and Methods: A descriptive and quantitative study that examined 750 panoramic radiographs, of this total, 120 were in accordance with the inclusion criteria of the study was conducted. Results: 157 seconds and third molars analyzed the prevalence of caries in the distal of the second molar was 25.5%. The most prevalent angle position of the third molar was 57.3% with the vertical, but the position with the highest percentage of decayed molar second distal mesioangular was 50% of the cases. The elements listed, males obtained 40% of second molar distal caries versus 17% for females. People aged 35 or older had the highest incidence with 50% distal caries while other bands obtained 16.21% in the group 18-24 years, and 23.52% in 25-34 years. Conclusion: It was possible to establish a sliding scale on the indication for prophylactic removal of mandibular third molar according to the angulation of Winter: horizontal, mesioangular, vertical and distoangular. One can also see a greater relevance to the indication of prophylactic removal of male individuals aged over 35 years.
Highlights
The third molars have always gained special attention by researchers, mostly because they are teeth that have a higher prevalence of inclusion [1]
He established the following angulations: vertical – when the long axis of the third molar is parallel to the second molar; mesioangular – when the crown is closer to the second molar root than to the third molar root; distoangular – when distally angled; and horizontal – when the angulation is so pronounced that it is perpendicular to the long axis of the second molar
For the objective of the study, to analyze the presence of caries on the distal surface of the second molar, the variables analyzed were the second and third molar, where every third molar was associated with its angulation and compared with the presence or absence of caries on the distal surface of the adjacent second molar (Table 2)
Summary
The third molars have always gained special attention by researchers, mostly because they are teeth that have a higher prevalence of inclusion [1]. In 1926, George Winter ranked third molars regarding their angles [3]; in 1933, Pell and Gregory classified regarding the depth of inclusion and in the mandible, the relations with the mandibular ramus [4]. These classifications made the communication between dentists easy, and assist in planning the surgery, which is usually indicated as to prevent pathologies [5]. In cases where the included third molar is inclined towards buccal or lingual sides, they are respectively classified as buccal- or lingualversion [3]
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