Statistics from most countries
show that one third of all preschool children have suffered
a TDI involving the primary dentition and one fourth of
all school children and almost one third of adults have
suffered a trauma to the permanent dentition, but
variations have been observed between and within countries.
Otuyemi et al., for example, explained the high
prevalence of TDIs in primary teeth in Nigeria to children
of preschool age as being more accident prone, especially
in societies where toddlers are in the care of children who
are only a few years older themselves