overview of complete dentures/preliminary impressions for edentulous patients/steps in complete denture fabrication

Question 1

resistance to vertical movement of the denture base towards the ridge
-initial support from bone and mucosa when bilateral simultaneous contact of opposing posterior teeth
-long term support- load the tissue areas most resis. to resorption

Answer 1

complete denture support

Question 2

resistance to horizontal or rotational movements
-ridge height
-base adaptation
-osccusal harmony
-neuromuscular control

Answer 2

complete denture stability

Question 3

resistance to displacement of the denture base away from the ridge
-adhesion
-cohesion

Answer 3

complete denture retention

Question 4

attraction between unlike molecules

Answer 4

adhesion

Question 5

-force between molecules of same material

Answer 5

cohesion

Question 6

with retention:

thin fluid between 2 closely contacting objects=

impression technique affects=

prevent ingress of air=

learned phenomenon- external contour of denture bases promote

and atmospheric pressure

Answer 6

interfacial surface tension

intimate tissue contact

border seal

neuromuscular control

Question 7

natural dent cm=

Answer 7

45cm2

Question 8

complete dentures cm max and mand=

Answer 8

max= 23
mand 12cm

Question 9

4 patient classifications

Answer 9

1 philosophical
2. exacting/critical
3. hysterical
4. indifferent

Question 10

intraoral exam look for:

Answer 10

1. mucosa- color, contour
2. basal seat- height, contour, ridge, parallelism, palatal vault shape
3. arch form- square, tapering, ovoid
4. interarch space?

Question 11

allows intraoral soft tissues to form the length, width and shape of custom tray borders prior to making the secondary impression

Answer 11

border molding

Question 12

63. What is the main ingredient in irreversible hydrocolloid?

Answer 12

diatomaceous earth 60%

a filler- increases strength and stiffness and makes smooth texture