“…reported that PEIR were not present in a younger age group (4‐8 years, 0%) whereas they were almost equally present in intermediate (9‐12 years, 46.2%) and adult age groups (13‐53 years, 53.8%) . Additionally, the patient prevalences in more recent studies, which had expanded population age ranges, were not much different from those in younger populations (Table ). Consequently, the wide variations in the reported patient prevalence might not be affected by differences in age range included in those studies, but rather, might result from differences in the samples in each study (ethnicity or the types of teeth examined) and different PEIR screening protocols (radiographic technique used, PEIR diagnostic criteria, diagnostic difficulties from radiographic quality, or examiner experience of this rare condition).…”