Dental Materials

the purpose of an impression is to make a _________ reproduction of teeth and tissues then once poured in gypsum is to make a _______ reproduction of teeth and tissues

what are the two hydrocolloids, give examples

what are three types of elastomers

what are the two categories of elastic impressions

what are three types of inelastic materials?

reversible hydrocolloid unergoes what type of reaction?

the solid to gel state of a reversible hydrocolloid is temperautre dependent?

temp solidifies but not temp liquifies

absorbs moisture

contract and squeeze out liquid

reversible hydrocolloid (agar) is popular for ______ preparations but ______

solidification by called is called?

______ ______ is needed for proper set gypsum for the reversible hydrocolloid

what is the gel strengthener for reversible hydrocolloid?

what is the antifungal for the reversible hydrocolloid?

_____ and _____ retard set of gypsum products

what cancels the effect of borax and agar?

what are three advanatages to the reversible hydrocolloid (agar)

an example of irreversible hydrocolloid is?

what type of reaction does irreversible hydrocolloid undergo?d

t/f irreversible hydrocolloid is temperature dependent by
True False

how can you delay or accelerate the setting up of irreversible hydrocolloid (alginate)

t/firreversible hydrocolloids are susceptible to imbibition but not syneresis
True False

what is the most widely used impression material?

what is added to keep alginate from interfering with set of gypsum products?

what is the mixing time for regular set alginate?

what ist he workingtime for fast set alginate?

what is not recommended with preparing alginate to affect the setting time?

how long do you rinse and disinfect an impression

you must pour an impression within _____ hour of taking the impression, why?

why does an impression change shape over time?

what must be covered on the maxillary of an impression? mandibular?

when loading a tray you load ____ increments and load ____

a right handed clinician must stand _____ pt at ____oclock position

a left handed clinician must stand _____ pt at ___oclock position

hydrocolloids are _____ and elastomers are ___ _____

t/f elastomers are hydrophobic
True False

silicone rubber is a ______ reaction silicion

polyvinyl siloxane (PVS) is ______ reaction silicion

what type of material has the smallest dimensional change?

when must you pour a PVS impression

what type of gloves must be worn when mixing PVS? why?

what type disinfectants are appropriate for alginate and silicone

how long must you disinfect an impression?