Final answer:
The best instrument for removing subgingival deposits on tooth #8 is a hand scaler due to its precise control and safe access to the area without damaging surrounding tissue.
Step-by-step explanation:
The best instrument to use for removing subgingival deposits on tooth #8 is a hand scaler. Hand scalers are designed to allow precise control and access to the subgingival area, which is necessary for the thorough removal of the deposits without damaging the surrounding tissue. Tools such as ultrasonic scalers and Cavitron can also be used for this purpose, but they may be less specific for subgingival areas and are typically used for supragingival scaling. An air scaler could potentially be too abrasive for delicate subgingival areas.
The best instrument to use to remove subgingival deposits on tooth #8 would be the hand scaler. Hand scalers provide precise control and allow for careful removal of deposits below the gum line. Ultrasonic scalers, air scalers, and Cavitron are all effective in removing supragingival deposits on the tooth surface, but may not be as effective in reaching subgingival deposits.