What instrument is commonly used in scaling?

The hand scaler is commonly used in scaling because it is specifically designed for the removal of plaque and calculus from the surfaces of the teeth. This instrument features a sharp, curved or straight blade that allows dental hygienists to effectively access various areas in the mouth, particularly around and between teeth and below the gum line. Its precise design enables the hygienist to apply the correct amount of pressure to remove deposits without damaging the tooth surface or surrounding tissues.

The dental mirror serves a different function; it is primarily used to provide visibility for the hygienist and to reflect light into the oral cavity. While an explorer is useful for detecting calculus and caries due to its pointed tip, it does not remove deposits. The high-speed handpiece is utilized in restorative procedures, such as drilling and polishing, and is not intended for scaling. Thus, the hand scaler is the optimal choice for scaling due to its specialized design and purpose.