Answer :
Final answer:
The structures needed from an impression for a removable prosthodontic appliance include teeth structures like enamel, cementum, dentin, pulp, apical foramen, and the tongue with its papillae. The dental formula indicating incisors, canines, premolars, and molars, as well as the shape of the dental arcade, are also important.
Explanation:
The different structures of the oral cavity that a dental laboratory technician requires from a final or secondary impression for a removable prosthodontic appliance include various oral tissues and dental structures. The teeth structures such as enamel, cementum, dentin, pulp, and the apical foramen are crucial for creating an accurate model of the patient's dentition. The dental formula, often represented as 2.1.2.3, details the types of teeth present in one quadrant of the mouth: incisors, canines, premolars (bicuspids), and molars (tricuspids).
Besides the teeth, the tongue and its various papillae types - filiform, fungiform, circumvallate, and foliate - along with the sulcus terminalis are important landmarks that affect the fitting and comfort of the prosthodontic appliance. Observing the shape of the dental arcade, the relationship between the teeth, and their orientation in the jaw also provide essential information for creating a well-fitting prosthodontic device. These anatomical details are necessary for ensuring that the removable prosthodontic appliance functions properly and fits comfortably in the patient's mouth.
