% pubman genre = article
@article{item_3009088,
title = {{Nondestructive adult age at death estimation: Visualizing cementum annulations in a known age historical human assemblage using synchrotron X{-}ray microtomography}},
author = {Le Cabec, Adeline {\textasteriskcentered} and Tang, Nancy K. {\textasteriskcentered} and Rubio, Valentin Ruano and Hillson, Simon},
language = {eng},
issn = {0002-9483},
doi = {10.1002/ajpa.23702},
publisher = {Wiley-Liss, Inc.},
address = {New York, NY},
year = {2019},
date = {2019-01},
abstract = {{Objectives: Adult age at death estimation continues to challenge physical anthropologists. One estimation method involves counting tooth cementum annulations (TCA). Non{-}destructively accessing TCA is a critical step to approaching fossil teeth of unknown age and to verifying life history profiles of human ancestors. This pilot study aims to (a) non{-}destructively image TCA in teeth from a known age archeological human population by propagation phase contrast X{-}ray synchrotron $\mu$CT (PPC{-}SR{-}$\mu$CT) (b) test the correlation between real and estimated ages, and the accuracy, precision and bias of age estimates.{\textless}br{\textgreater}Materials and Methods: We examine 20 permanent human canines (aged 20{\textendash}81 years), from a 18th to 19th century known age collection from St. Luke{\textquotesingle}s Church (London, England). We scanned transverse segments of acellular cementum in the apical portion of the middle root third using PPC{-}SR{-}$\mu$CT. We generated virtual transverse sections on which two observers perform two sessions of blind TCA counts. We calculate the estimated ages at death by adding 10 years to the TCA counts.{\textless}br{\textgreater}Results: A moderately strong positive linear relationship exists between real and estimated ages (r {\textequals} 0.76, p {\textless} .001), with an average inaccuracy of 16.1 years and an average bias towards underestimation of 15.7 years. This difference is lower in individuals {\textless}50 years (6.8 and 6.5 years, respectively, n {\textequals} 10) compared with those {\textgreater}50 years (24.9 years, n {\textequals} 10).{\textless}br{\textgreater}Discussion: We reliably imaged and identified TCA in individuals {\textless}50 years from a known{-}age archeological sample. Scanning refinement will yield a promising alternative to current destructive methods of TCA analyses and to aid access to life history events in adult fossil hominins.}},
journal = {{American Journal of Physical Anthropology}},
volume = {168},
number = {1},
pages = {25--44},
}