MOD C Dental materials: terminology exam 2 (final)

Question 1

gelatin-type material derived from seaweed used as a thickener

Answer 1

agar

Question 2

irreversible hydrocolloid material used for taking preliminary impressions

Answer 2

alginate

Question 3

foundation or the basic ingredient of a material

Answer 3

base

Question 4

process of using finger pressure to contour a closer adaptation of the margins of an impression while still in the mouth

Answer 4

border molding

Question 5

substance that modifies or increases the rate of a chemical reaction

Answer 5

catalyst

Question 6

having an object centered, such as maxillary teeth centered over mandibular teeth in correct relation

Answer 6

centric

Question 7

suspension of particles in a dispersion medium such as water. Its two phases are sol and gel

Answer 7

colloid

Question 8

material having elastic properties from rubber

Answer 8

elastomeric

Question 9

prefix meaning “water”

Answer 9

hydro

Question 10

absorption of water, causing an object to swell

Answer 10

imbibition

Question 11

loss of water, causing something to shrink

Answer 11

syneresis

Question 12

bringing a material to a desired consistency

Answer 12

tempering

Question 13

dental laboratory device that simulates the movement of the mandible and temporomandibular joint when the dental cast is attached to it

Answer 13

articulator

Question 14

chemical process in the setting of dental stone and plaster in which a cluster of crystals interlink, giving strength and rigidity

Answer 14

crystallization

Question 15

related to gypsum products, indicating two parts of water to one part of calcium sulfate

Answer 15

dihydrate

Question 16

referring to a dental material that retains its original dimension when subjected to a change in temperature and humidity

Answer 16

dimensionally stable

Question 17

portion of articulator used to transfer the relationship of the maxillary arch and temporomandibular joint to a dental cast

Answer 17

face bow

Question 18

chemically known as calcium sulfate dihydrate; a mineral used in the formation of plaster of Paris and dental stone

Answer 18

gypsum

Question 19

having a uniform quality and consistency throughout

Answer 19

homogenous

Question 20

dental laboratory machine with various cutting instruments, grinding stone, and polishing wheels used for dental appliances

Answer 20

dental lathe

Question 21

replica of the maxillary and mandibular arches made from an impression

Answer 21

model

Question 22

molecule that, when combined with other molecules, forms a polymer

Answer 22

monomer

Question 23

chemical compound consisting of like units bonded together

Answer 23

polymer

Question 24

mixture of gypsum and water used in the finishing of models

Answer 24

slurry

Question 25

substance that can evaporate easily and is very explosive

Answer 25

volatile