Bridgework

Question 1

what are the three treatment options for missing teeth/ tooth

Answer 1

no treatment - leave space
replace teeth
close space with orthodontics

Question 2

what are three teeth replacement options

Answer 2

denture
bridge
implants

Question 3

what is an adhesive bridge

Answer 3

attached to abutment teeth with wings on palatal surfaces

Question 4

what is a conventional bridge

Answer 4

held onto abutment teeth with crowns

Question 5

name three indications for bridgework

Answer 5

function and stability of dentition
speech
epilepsy - partial denture contraindicated

Question 6

name three contraindications for bridgework

Answer 6

uncooperative patient
poor oral hygiene/ high caries rate
periodontal disease

Question 7

what is an abutment in a bridge

Answer 7

tooth which serves as an attachment

Question 8

what is a pontic in a bridge

Answer 8

missing teeth to be replaced

Question 9

what is a retainer in bridge work

Answer 9

the indirect restoration used to connect to the pontic and cemented onto the abutment tooth

Question 10

what is a connector in bridgework

Answer 10

component which connects the pontic to retainer

Question 11

what is a pier in bridgework

Answer 11

abutment tooth which stands between and supports two pontics

Question 12

what are the two types of bridge designs

Answer 12

fixed-fixed bridge
cantilever

Question 13

what is a fixed-fixed bridge design

Answer 13

has retainer at each end
can be adhesive retained or conventional

Question 14

what is a cantilever bridge

Answer 14

has retainer at one side of pontic only
can be either adhesive or conventional retained

Question 15

name three advantages of adhesive cantilever bridges

Answer 15

minimal/ no prep
no anaesthetic
less costly due to less surgery time

Question 16

name three disadvantages of adhesive cantilever bridges

Answer 16

rigorous clinical technique
metal can shine through
can debond

Question 17

name two indications and two contraindications of adhesive cantilever bridges

Answer 17

minimal occlusal load
good enamel quality

heavy occlusal load (bruxist)
poorly aligned/ tilted teeth

Question 18

when might a direct resin bonded bridge be used

Answer 18

emergency situations - root fractures/ if tooth needs XLAd immediately

Question 19

what are the two types of resin bonded bridges

Answer 19

direct
indirect

Question 20

what is the general rule for cantilever vs fixed-fixed bridge

Answer 20

anterior = cantilever
posterior = fixed-fixed

Question 21

how are teeth prepared for a bridge

Answer 21

180 degree wrap around prep
supragingival chamfer finish line at 0.5mm
prep remains in enamel

Question 22

what are the five designs for pontic retainer thickness in cantilever bridges

Answer 22

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

Question 23

what is the minimal preparation for an anterior cantilever

Answer 23

occlusal contact reduction
chamfer 0.5mm margin

Question 24

what is the heavier preparation for an anterior cantilever

Answer 24

0.5mm palatal reduction
0.5mm chamfer

Question 25

what is the posterior preparation for a cantilever OR fixed-fixed bridge design

Answer 25

0.5mm chamfer wrap around margin

Question 26

how is the bridge cemented with panavia

Answer 26

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