Bridgework 1

Question 1

why do we treat tooth loss

Answer 1

aesthetics
function
speech
maintenance of dental health

Question 2

what are the options for tooth replacement

Answer 2

denture
bridge
implant

Question 3

what is a bridge

Answer 3

a prosthesis which replaces a missing tooth or teeth and is attached to one or more natural teeth

Question 4

what are the indications for bridgework

Answer 4

function and stability
appearance
speech
psychological reasons
systemic disease
co-operative patient
big teeth
heavily restored teeth
favourable abutment angulations
favourable occlusions

Question 5

what are the contra-indications for bridgework

Answer 5

uncooperative patient
medical history
poor OH
high caries rate
periodontal disease
large pulps
high possibility of further tooth loss within arch
prognosis of abutment poor
length of span too great
ridge form and tissue loss
tilting and rotation of teeth
degree of rotation
periapical status
periodontal status

Question 6

what is an abutment

Answer 6

tooth which serves as an attachment for a bridge

Question 7

what is a pontic

Answer 7

artificial tooth which is suspended from abutment teeth

Question 8

what is a retainer

Answer 8

extracoronal or intracoronal restorations that are connected to the pontic and cemented to the prepared abutment teeth

Question 9

what are connectors

Answer 9

component which connects the pontic to the retainers

Question 10

what is edentulous span

Answer 10

space between natural teeth that is to be filled by a bridge or partial denture

Question 11

what is a saddle

Answer 11

area of edentulous ridge over which the pontic will lie

Question 12

what is a pier

Answer 12

abutment tooth which stands between and is supporting two pontics

Question 13

what is a unit

Answer 13

either retainer or pontic

Question 14

what are the different types of conventional bridge prep

Answer 14

fixed-fixed
fixed cantilever
fixed moveable

Question 15

what are the two main bridge types

Answer 15

conventional bridge
resin retained bridge

Question 16

what is a hybrid bridge

Answer 16

fixed retainer and adhesive retainer

Question 17

when is direct resin bonded bridgework used

Answer 17

in emergency situations
tooth needs to be extracted
tooth lost traumatically

Question 18

why do you need good palatal coverage on a resin bonded bridge

Answer 18

greater surface area means a greater bond

Question 19

when would you use a cantilever bridge

Answer 19

anterior teeth

Question 20

when would you use a fixed-fixed bridge

Answer 20

posterior

Question 21

what does divergent guidance paths mean

Answer 21

on the pontic the occlusal force goes horizontal which means it goes into the abutment tooth (abutment tooth carries the occlusal force of the pontic)

Question 22

if a tooth already has a composite in it but you want to make a bridge what should you do

Answer 22

consider replacement but might be fine to keep as composite bonds to composite

Question 23

if a tooth already has an amalgam in it but you want to make a bridge what should you do

Answer 23

consider replacing

Question 24

what is the general prep for a bridge

Answer 24

180 degree wrap around prep
rest seats for mechanical retention
proximal grooves
supragingival chamfer finish line
prep remain in enamel

Question 25

what is anterior prep for a bridge

Answer 25

cantilever design so either no prep or minimal prep or heavier prep

Question 26

what is minimal prep for a cantilever

Answer 26

occlusal contact reduction
cingulum undercut removal only
chamfer margin 0.5mm

Question 27

what is heavy prep for a cantilever

Answer 27

0.5mm palatal reduction
cingulum rest
proximal grooves
chamfer margin 0.5mm

Question 28

how do you temporise after prepping the tooth

Answer 28

consider RPD
if into dentine cover with DBA

Question 29

what is the fitting surface of the retainer made of

Answer 29

cobalt chrome or nickel chromium alloy

Question 30

what is the process of cementation for resin bonded bridge

Answer 30

rubber dam
etch abutment
apply panavia etch
put resin on wing and seat on abutment tooth

Question 31

what do you do once you have cemented a bridge

Answer 31

check occlusion
demonstrate to the patient how to clean around and underneath the bridge