accuracy of dental age estimation charts schour and massler ubelaker and the london atlas dental age estimation charts are frequently used to assess maturity and estimate age the aim of this study was to assess the accuracy of estimating age of three dental development charts schour and massler ubelaker and the london atlas the test sample was skeletal remains and dental radiographs of knownage individuals n1506 prenatal to 2394 years dental age was estimated using charts of schour and massler ubelaker and the london atlas dental and chronological ages were compared using a paired ttest for the three methods the absolute mean difference between dental and chronological age was calculated results show that all three methods underestimated age but the london atlas performed better than schour and massler and ubelaker in all measures the mean difference for schour and massler and ubelaker was 076 and 080 years sd 127 year n1227 respectively and for the london atlas was 010 year sd 097 year n1429 further analysis by age category showed similar accuracy for all three methods for individuals younger than 1 year for ages 118 the mean difference between dental and chronological ages was significant p005 for the london atlas for most age categories these findings show that the london atlas performs better than schour and massler and ubelaker and represents a substantial improvement in accuracy of dental age estimation from developing teeth