|XX Congreso de la Sociedad Española de Antropología Física
|Modesto-Mata, Mario; Garcia, Cecilia; Martínez de Pinillos, Marina; Martín-Francés, Laura; Romero, Alejandro; Pérez-Pérez, Alejandro; Lozano, Marina; Martinón-Torres, María; Dean, M. Christopher; Bermúdez de Castro, José María
Introduction. Total number of perikymata in a crown of a tooth is of extreme value when assessing enamel formation times. By now, studies about enamel formation times and perikymata counts were performed in a relatively reduced geographical modern human sample. However, it has been identified not only differences in the total number of perikymata between modern humans and neandertals, but also it seems that their growth-pattern remains distinct. So, it is vital to widen the knowledge of modern human variability concerning these two remarkable developmental variables: total number of perikymata and pattern of growth along the crown height. Material and method. A broad sample of modern human unworn teeth has been studied. They come from either archaeological sites of the Iberian Peninsula or current modern human population from Africa, Europe, South America, North America and Asia. Environmental scanning electron microscope (ESEM) was employed to obtain images of the surface of the teeth. Results and discussion. It has been documented that the total number of perikymata is remarkably variable among all modern human populations. However, their growth-patterns display a common tendency, where the first deciles of the crown height content a low number of perikymata compared to the last deciles, where the density of perikymata are quite and reasonably high.