The dental survey, which was conducted across 203 state-maintained mainstream schools, examined 6,329 children in school year seven (aged 12) during the winter and spring terms of 2023 to 2024.
Archwiliodd yr arolwg deintyddol, a rannwyd â 203 o ysgolion prif ffrwd a gynhelir gan y wladwriaeth, 6,329 o blant ym mlwyddyn ysgol saith (12 oed) yn ystod tymhorau’r gaeaf a’r gwanwyn 2023 i 2024.