Describe the different structures of the oral cavity that the dental laboratory technician requires from a final impression for a removable prosthodontic appliance, and compare these with the requirements for a fixed- prosthesis case.

Both the methods used in making conventional impressions and digital impressions are shown in this presentation. The various impression materials are described and their suitability for fixed prosthodontic impressions is discussed. Materials described include irreversible hydrocolloid, reversible hydrocolloid, polysulfide, condensation reaction silicone, addition reaction silicone, polyether, and alginate substitutes. The design principles and methods for making custom impression trays are described. Impression methods are demonstrated in detail and are supplemented with a video demonstration.

Explanation:

answer:

gygu hj j uy   b

explanation:

08: 21

read the excerpt from "the tell-tale heart.”

object there was none. passion there was none. i loved the old man. he had never wronged me. he had never given me insult. for his gold i had no desire. i think it was his eye! yes, it was this! he had the eye of a vulture—a pale blue eye, with a film over it. whenever it fell upon me, my blood ran cold; and so by degrees—very gradually—i made up my mind to take the life of the old man, and thus rid myself of the eye forever.  

read the excerpt from "the black cat.”

beneath the pressure of torments such as these, the feeble remnant of the good within me succumbed. evil thoughts became my sole intimates—the darkest and most evil of thoughts. the moodiness of my usual temper increased to hatred of all things and of all mankind; while, from the sudden, frequent, and ungovernable outbursts of a fury to which i now blindly abandoned myself, my uncomplaining wife, alas! was the most usual and the most patient of sufferers.

by revealing the narrator’s deepest thoughts, the author

answer:

Explanation:

A- 3

B- 4

C- 1

D- 2