relines, repairs and additions Flashcards
(22 cards)
what do relines and rebases do?
provide a new fitting surface to the denture
what is a reline?
adding new base material to the fitting surface of an existing denture
can a reline be done chair side or in the lab?
both
more resilient relines are done in the lab
what is a rebase?
replace the endure denture base material of an existing denture
complete dentures only
name 3 types of relines
temporary
soft
permanent
when are temporary relines used? 3
grossly ill-fitting dentures causing trauma to allow healing
after immediate denture placement when resorption has occurred following XLA
after implant surgery
when are soft relines used? 3
parafunction
very atrophic ridges
cancer/cleft palate obturation
name 3 downsides of soft relines?
plasticiser leaches
deteriorates with time
harbour microorganisms - candida
what materials are used for soft relines? 2
heat or self cured acrylics
heat or self cured silicones
when are permanent relines used? 4
if peripheral seal problems
corrections of errors following inadequate master impressions
immediate/post immediate dentures
prolong lifespan of older dentures
what material is used for permanent relines?
hard, heat cured acrylic
technique to rebase denture - clinic
? are removed from the denture
?? taken using denture and ?? technique - so that the ? doesn’t change
? and send to lab
undercuts
wash impression
closed mouth
occlusion
disinfect
technique to rebase denture - lab
impression poured in ?
overcast in ?
denture removed
? carved in stone
fitting surface of denture is removed to allow space for ?
denture placed back onto ?and held together with sticky wax
wax fills the gaps between the denture and ?
flask using Dundee injection method - remove ?, inject ?
ground and polished
stone
plaster
post-dam
wax
overcast
model
wax
acrylic
how long after fitting a denture should it be reviewed?
1-2 weeks later
if there is a midline denture fracture what can be done?
if have both pieces - disinfect, send to lab, cast poured, fracture area removed and replaced with acrylic
if the flange has fractured what can be done?
take an impression with the fractured denture in the mouth, leave the denture in the impression, disinfect and send to lab
what can be done if the acrylic saddle detaches from the CoCr baseplate?
solder on retentive tags
or
use 4-META or silicoat CoCr
to retain acrylic ot CoCr
temporary denture repairs can be done chair side, what 2 materials can be used?
self-cure acrylic
cyanoacrylate glue
can you add to complete and partial dentures?
no, can only add to partial dentures
what is an immediate addition to a denture?
tooth is extracted and on the same day a tooth is added to previous denture
what is a post-immediate addition to a denture?
tooth is extracted and at a later date a tooth is added to previous denture
what is a retention addition to a denture?
clasp is added to improve retention when inadequate
