Bridgework Flashcards
what are the three treatment options for missing teeth/ tooth
no treatment - leave space
replace teeth
close space with orthodontics
what are three teeth replacement options
denture
bridge
implants
what is an adhesive bridge
attached to abutment teeth with wings on palatal surfaces
what is a conventional bridge
held onto abutment teeth with crowns
name three indications for bridgework
function and stability of dentition
speech
epilepsy - partial denture contraindicated
name three contraindications for bridgework
uncooperative patient
poor oral hygiene/ high caries rate
periodontal disease
what is an abutment in a bridge
tooth which serves as an attachment
what is a pontic in a bridge
missing teeth to be replaced
what is a retainer in bridge work
the indirect restoration used to connect to the pontic and cemented onto the abutment tooth
what is a connector in bridgework
component which connects the pontic to retainer
what is a pier in bridgework
abutment tooth which stands between and supports two pontics
what are the two types of bridge designs
fixed-fixed bridge
cantilever
what is a fixed-fixed bridge design
has retainer at each end
can be adhesive retained or conventional
what is a cantilever bridge
has retainer at one side of pontic only
can be either adhesive or conventional retained
name three advantages of adhesive cantilever bridges
minimal/ no prep
no anaesthetic
less costly due to less surgery time
name three disadvantages of adhesive cantilever bridges
rigorous clinical technique
metal can shine through
can debond
name two indications and two contraindications of adhesive cantilever bridges
minimal occlusal load
good enamel quality
heavy occlusal load (bruxist)
poorly aligned/ tilted teeth
when might a direct resin bonded bridge be used
emergency situations - root fractures/ if tooth needs XLAd immediately
what are the two types of resin bonded bridges
direct
indirect
what is the general rule for cantilever vs fixed-fixed bridge
anterior = cantilever
posterior = fixed-fixed
how are teeth prepared for a bridge
180 degree wrap around prep
supragingival chamfer finish line at 0.5mm
prep remains in enamel
what are the five designs for pontic retainer thickness in cantilever bridges
wash through - no contact with soft tissue
dome shaped - point contact with soft tissue
modified ridge lap - palatal cut away
ridge lap - greatest contact with soft tissue
ovate - presses into ridge so tooth looks like its emerging from gingivae
what is the minimal preparation for an anterior cantilever
occlusal contact reduction
chamfer 0.5mm margin
what is the heavier preparation for an anterior cantilever
0.5mm palatal reduction
0.5mm chamfer
what is the posterior preparation for a cantilever OR fixed-fixed bridge design
0.5mm chamfer wrap around margin
how is the bridge cemented with panavia
try bridge in for fit
micro-etch retainer (sandblast)
apply A and B mixed together for 30 seconds - self cure
air dry for 2 seconds
fit retainer and remove excess cement
