Impression Taking Flashcards
what should primary impressions do
accurately record clinical relevant landmarks without excessive tissue distortion
what are casts used for
treatment planning
construction of special trays
what are the upper clinically relevant landmarks
hard palate
ridge crest
what are the lower clinically relevant landmarks
buccal shelf and pear shaped pad
ridge crest and genial tubercles
labial ridge incline
what materials are used to modify stock trays
putty
soft red wax
reed composition
greenstick
how do you reduce extension of stock trays
with acrylic bur and straight handpiece
what are the limitations of stock trays
trays are not made to measure
peripheral extensions
limited sizes available
require master impressions to record denture bearing area with accuracy
why would you not use alginate
retching patients
rapid working time
how do you border mould the lower anterior lingual sulcus
stick tongue out
how do you assess an impression
are all edentulous areas included
are the sulci areas to be included in the denture recorded fully
are deficiencies present due to air inclusion
is impression fit for purpose or not
what are the master impressions to record
denture bearing area, functional depths and width of sulci
what size spacer is needed for alginate
3mm
what are the advantages of special trays
accurate peripheral extension
uniform thickness of material
reduced amount of material - less discomfort
records denture bearing area more accurately
how do you handle alginate after impressions
keep moist and cast asap
