Keywords
impacted teeth
incisors
mixed dentition
oral epidemiology
orthopantomography
prevalence
Quito, Ecuador
How to Cite
Abstract
Background: The prevalence of impacted incisors varies between 0.01% and 16.92%. This variability may be due to differences in sampling and assessment methods. Purpose: To identify the prevalence and characteristics of impacted incisors by analyzing digital panoramic radiographs in patients with dental age 6 to 12 years, treated between January 2016 and August 2021 in Quito, Ecuador. Methods: Cross-sectional study. 8,000 digital panoramic radiographs from a radiology center in southern Quito were reviewed; 758 met the inclusion and exclusion criteria. Dental age, sex, presence of impacted incisors, type, number, height, angle, and distance from the midline, and associated alterations were recorded. The data were entered into a matrix and analyzed using SPSS v25. Descriptive statistics and the chi-square test were applied, with a 95% confidence level. Results: The prevalence was 11.9% (95% CI). It was more frequent in males (7.5%) and in the 8.0–8.9 year age group (4.3%). Tooth 21 was the most frequently affected (32%). In 67% of cases, a single impacted incisor was observed. Fifty percent were located 6–10 mm above the midline. Seventy-five percent presented an angle <20° with respect to the midline. Ninety percent had a distance greater than 0 from the midline. Conclusions: The prevalence of impacted incisors was higher in males and in dental ages between 7.0 and 8.9 years. Sex and age were associated with the presence and characteristics of dental impaction.
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