Which of the following is not part of the responsibilities of a Dental Assistant II?

Placing dental fillings is not part of the responsibilities of a Dental Assistant II, as this task typically falls within the scope of practice for a licensed dentist or dental hygienist, who has received extensive training and certification to perform such procedures. While a Dental Assistant II may assist in various procedures, the actual placement of fillings requires a higher level of clinical skill and knowledge, often involving the direct treatment of dental caries, which is outside the realm of a dental assistant's duties.

In contrast, polishing teeth, taking patient histories, and scheduling appointments are indeed part of the responsibilities that a Dental Assistant II may typically perform. Polishing teeth involves less invasive techniques to enhance oral hygiene, taking patient histories ensures that the dental team is aware of any health issues that could impact treatment, and scheduling appointments is crucial for managing the practice efficiently and ensuring patient flow.