Prosthodontics L6 - impressions for dentures Flashcards
why are impressions necessary in dentistry?
active treatment : construction of appliance (removable prostheses)
monitoring : 1. pre & post treatment. 2. progression of tooth wear 3. record keeping 4. medico-legally/regulations
what must your first (primary) impressions record
should accuratley record clinical relevant landmarks without excessive tissue distortion
what are clinically relevant landmark in partial dentures
natural teeth
denture bearing area (sulcus, ridge, muscle)
what are the two relevant landmarks for complete dentures in the upper jaw
primary support area = hard palate
secondary support area = ridge crest
what are the two clinically relevant landmarks for complete dentures in the mandible
primary support area = buccal shelf and pear shaped pad
secondary support area = ridge crest and genial tubercles
what ar the first primary impressions used fro
treatment planning
examination of occlusion (on articulator) [partials]
determination of path of insertion and denture design
construction of special trays
which impression is used to obtain further detail and accuracy on casts
require master (2nd) impressions
which of these stock trays are used to take impressions of edentulous
bottom trays support edentulous teeth
how would border mould the lower anterior lingual sulcus
get the patient to stick their tongue out to get correct sulcus depth.
when must you do a self reflection when doing impressions
when the impression has to be done again
after taking an impression you would rinse it for the removal of saliva, blood and debris. what would you do next
disinfect for 3 minutes in 1% sodium hyochlorite
