What are the types of impressions obtained in dentistry?

The correct answer identifies the types of dental impressions as preliminary, final, and bite registration, each serving a distinct purpose in dental practice.

Preliminary impressions are taken to create a basic mold of the dental arches and soft tissues, often used for diagnostic purposes, treatment planning, or to fabricate provisional restorations. They provide a general outline of the shape and size of the patient's mouth, which is essential for planning further treatments.

Final impressions are more detailed and accurate, capturing the contours and features of the prepared teeth and surrounding tissues. These impressions are vital for fabricating precise dental appliances such as crowns, bridges, and dentures, ensuring they fit perfectly in the patient's mouth.

Bite registration impressions record the occlusion and how the upper and lower teeth interact. This information is crucial when creating restorations or prosthetics and helps ensure proper alignment and function.

Understanding these types of impressions is fundamental for dental assistants as they facilitate effective communication with the dental team and ensure high-quality patient care.