Final answer:
The right choices for removing hard subgingival deposits are the ultrasonic scaler or the hand scaler. Ultrasonic scalers work with high-frequency vibrations, while hand scalers require manual effort. The choice between the two depends on various factors, including the clinician's preference and the specific conditions of the patient's teeth.
Step-by-step explanation:
When considering which of the following should be used to remove the hard subgingival deposits on a client's teeth, the correct choice would often be either the ultrasonic scaler or the hand scaler. These tools are specifically designed for removing calculus and other hard deposits that can form below the gumline, which is an area known as subgingival. In contrast, an air polisher is generally used for removing soft deposits and stains on the tooth surfaces above the gumline, and dental floss is intended for removing plaque and food particles between teeth and just below the gumline, but is not effective for hard deposits.
Ultrasonic scalers use high-frequency vibrations to break up calculus and bacterial biofilm, whereas hand scalers require manual scraping against the teeth surfaces. Both methods are commonly employed by dental professionals and are key components of a routine dental prophylaxis or periodontal therapy. The choice between using an ultrasonic scaler or a hand scaler may depend on the specific situation, the clinician's preference, and the patient's needs, but generally, the ultrasonic scaler is often preferred for its efficiency and effectiveness in calculus removal.