dentures

Question 1

denture history questions

Answer 1

when did you become edentulous?
when did you lose your teeth?
how many sets of dentures have you had?
how long did each set of dentures last?
how old is your present set of dentures?
do your current dentures cause any discomfort?
do you wear your dentures at night?
can you eat with your current dentures?
do you like the appearance of your current dentures?

Question 2

important medical factors for denture wearers

Question 3

pt assessment for dentures

Answer 3

collect a denture history
clear medical history: oral manifestations of systemic disorders
role of polypharmacy

check the denture cleanliness and how well OH is maintained

check ridges by palpation

try in each denture upper then lower

check restorative handbook

Question 4

retention

Answer 4

resistance of denture to vertical movement away from tissues

classified as: good, adequate, poor

Question 5

reasons for poor denture retention

Answer 5

under or overextension of the periphery
position of post dam
adaption of the fitting surface
lack of adequate saliva

Question 6

stability definition

Answer 6

the resistance of a denture to displacement by functional forces

Question 7

reasons for lack of denture stability

Answer 7

mobility of the ridge
unsupported ridge
extensive resorption
inadequate muscle control
tooth position which encourages displacement either at rest or in function

Question 8

what requirements should a special tray have?

Answer 8

close fitting 0.6mm spacer light cured trays

if undercuts present, spaced tray for alginate/silicone

peripheral border should finish 2mm short of the depth of the sulcus recorded by the primary impression: this is an estimate of the mucogingival line and will assist the clinician in recording the functional sulcus depth in the master impression

perforated: reduces the compression of tissue leading t o a more mucostatic impression

Question 9

what should master impressions record?

Answer 9

detail of the maximum denture bearing area with the functional depth and width of the sulcus so that the denture maintains an effective border seal

Question 10

what is the most appropriate impression material for master impressions

Answer 10

hydrophilic low viscosity properties that record surface detail