California Registered Dental Assistant (RDA) Written Practice Exam

An orthodontic scaler is a dental tool commonly used for removing excess bonding material or cement from teeth. It can also be used to remove tartar and plaque from teeth before or after an orthodontic treatment. Option A, polishing teeth, is done using a different tool called a dental polisher. Option C, cutting arch wires, is done using a different tool as well, called an orthodontic wire cutter. Finally, option D, measuring tooth alignment, is typically done using a tool called an orthodontic ruler. Therefore, option B is the most correct answer as it specifically describes the main use of an orthodontic scaler.