Sciote, James J.2024-09-122024-09-122024-08http://hdl.handle.net/20.500.12613/10626Objectives: The London Atlas of Human Tooth Development and Eruption was created in 2010 to evaluate tooth and root development and predict an age. The London Atlas uses a dental quadrant cartoon depiction of dental development for each age group based on the illustrations from Moorrees method. This study aims to determine if the London Atlas estimated dental age matched chronological age in a multiethnic North Philadelphia population. In addition, to determine how many individual teeth deviate from their total dental age estimation. Materials & Methods: 200 panoramic radiographs taken of patients aged 7-12 at Temple University’s Orthodontic Department were evaluated. A dental age was chosen for each panoramic radiograph based on the London Atlas. The right dentition excluding the third molars were recorded if they deviate from the selected dental age depiction (accelerated or delayed relative to the London Atlas’s year interval depictions). Results: A total of 200 patients were included in the study with a mean age of 10.15 years. There was a strong correlation between the London Atlas dental age estimation and chronological age (p<.001:rho:0.835). The overall difference between estimated age and chronological age was 0.23 years. The average number of deviations from estimated dental age per tooth was 25.9. There was a weak negative correlation between dental age and the number of individual tooth outliers that had accelerated age (p=0.018:rho=-0.167) and delayed age (p=0.005:rho=-0.197). Furthermore, there was a weak to moderate negative correlation between estimated dental age and total number of teeth that were either accelerated or delayed (p<0.001:rho=-0.364). Conclusion: The London Atlas has a 71% accuracy for dental age estimation being highly correlated with chronological age. The most common tooth with deviations compared to the selected dental age estimate was the upper second molar and children with older estimated dental ages have fewer teeth that are delayed or accelerated. This suggests that it may be highly accurate to use the London Atlas for the North Philadelphia population especially for older children.60 pagesengIN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available.http://rightsstatements.org/vocab/InC/1.0/DentistryText158162024-08-30Alexander_temple_0225M_15816.pdf