The chewing surfaces of back teeth are covered in deep grooves called pits and fissures. These grooves trap food and plaque, and their narrow shape makes them hard for a toothbrush to clean – which is why they are the most common place for childhood cavities to begin.
Pit and fissure treatment protects these vulnerable surfaces. Healthy but deep grooves can be sealed with a protective coating before decay starts, while grooves with early decay are gently cleaned and restored with tooth-coloured filling material. Both are quick, comfortable procedures that significantly reduce the risk of larger cavities later.
Children whose milk molars or newly erupted permanent molars have deep grooves, early signs of decay on chewing surfaces, or a history of cavities – ideally soon after the molars erupt.