Which instrument is used to take an impression of the patient's bite?

The instrument used to take an impression of the patient's bite is the bite/wax (wafer). This tool is specifically designed to capture the occlusion, or the way the upper and lower teeth come together, during the impression process. The material used in a bite wafer is often soft and pliable, allowing it to conform to the shape of the dental arch when pressure is applied.

Bite impressions are crucial in various dental procedures, including the fabrication of dentures, orthodontic appliances, and crowns. They help dental professionals assess the alignment and spacing of the teeth, ensuring that any prosthetics or treatments fit correctly and function properly.

The other instruments listed serve different purposes. A base former is typically used in the preparation of dental materials or applications in prosthetics, while a denture case is intended for storing dentures rather than taking impressions. A lab knife is used for cutting materials in the dental laboratory but is not suited for capturing bite impressions. Understanding the specific function of dental instruments is vital for effective chairside assisting and ensuring patient care is carried out with precision.