Which instrument is used to secure and adjust the dam around a tooth during isolation?

• A. Clamp forceps
• B. Rubber dam clamp
• C. Rubber dam frame
• D. Air turbine handpiece

Answer: (B)

Securing a rubber dam around a tooth relies on an anchor that sits on the tooth to create a tight, moisture-free field. The rubber dam clamp provides that anchor by seating onto the tooth and gripping it securely, so the dam can seal snugly around the tooth’s neck. The clamp is chosen based on the tooth’s size and position, and it is placed with clamp forceps to position and remove it as needed. Once in place, the dam is stretched and held by the frame, and any fine adjustments are made to ensure the border hugs the tooth closely, preventing saliva from leaking into the isolated area. The other tools serve different roles: the frame simply holds the dam sheet, and the air turbine handpiece is used for drilling, not isolation.