What tool is mainly used to extract decay from a cavity?

The excavator is primarily designed for the purpose of removing decay from a cavity. It features a sharp, spoon-shaped end that allows the dentist or dental hygienist to effectively scoop out decayed tooth material. This tool is essential in preparing the cavity for restoration by ensuring that all affected tissue is excised, which is crucial for the longevity of the filling and the overall health of the tooth.

In a clinical setting, using the excavator helps maintain the integrity of the surrounding healthy tooth structure while precisely removing only the decayed areas. This selective removal is necessary to prevent further deterioration and to provide a clean surface for any restorative materials that will be placed afterward.

The other tools mentioned serve different purposes; a mirror is used for visualization within the oral cavity, a scaler is intended for removing calculus and plaque from teeth, and a polisher is typically used at the end of a dental cleaning procedure to smooth the surface of the teeth after scaling. Each tool has a specific role in dental care, but the excavator stands out as the primary choice for extracting decay from cavities.