FP - conventional bridgework

Question 1

what are the 5 components of conventional bridgework?

Answer 1

abutment
retainer
connector
pontic
saddle

Question 2

what is the abutment in conventional bridgework?

Answer 2

the prepared tooth onto which the bridge fits

Question 3

what is the retainer in conventional bridgework?

Answer 3

the indirect restoration for the abutment

Question 4

what is the connector in conventional bridgework?

Answer 4

the part of the bridge which connects the retainer to the pontic

Question 5

what is the pontic in conventional bridgework?

Answer 5

the prosthetic tooth/ teeth

Question 6

what is the saddle in conventional bridgework?

Answer 6

the alveolar ridge after tooth loss

Question 7

what are the 4 designs of conventional bridgework?

Answer 7

fixed-fixed
cantilever
fixed-moveable
complex

Question 8

what are the advantages of fixed-fixed bridges?

Answer 8

longer span
pontic can support loading

Question 9

what is the requirement for fixed-fixed bridge?

Answer 9

need teeth with the same long axis

Question 10

describe a cantilever bridge?

Answer 10

simplest form of conventional bridgework
max 2 units
generally a mesial pontic
no loading in ICP or excursion on pontic

Question 11

where are cantilever bridges better suited for?

Answer 11

posteriorly in the mouth

Question 12

what is a spring cantilever bridge used for?

Answer 12

old fashioned
originally for spaced anterior dentition

Question 13

what are fixed-moveable bridges used for?

Answer 13

mal-aligned teeth - long axes may very

Question 14

what are the advantages of fixed-moveable bridges?

Answer 14

solution for alignment problems
good track record
cooperate physiological mesial drift

Question 15

what are disadvantages of fixed-moveable bridges?

Answer 15

expensive
increased stress on major abutment

Question 16

what is the risk of prepping for a fixed-fixed bridge on misaligned teeth?

Answer 16

pulp exposure

Question 17

what must pontics fulfil the role of?

Answer 17

replacing function of lost tooth
achieve an aesthetic appearance
enable adequate OH
prevent tissue irrigation

Question 18

what pontic design is used for anterior teeth?

Answer 18

modified ridge lap

Question 19

what pontic design is used for posterior teeth?

Answer 19

modified ridge lap

Question 20

what pontic design is a plaque trap?

Answer 20

saddle
ridge lap

Question 21

what measurement should the clear space be for a wash-through hygienic pontic design?

Answer 21

2-3mm

Question 22

what is the general pontic design of choice?

Answer 22

modified ridge lap

Question 23

when doing palatal prep, what should be preserved where posibble?

Answer 23

cingulum

Question 24

what are the methods available to assess undercuts in conventional fixed fixed bridge preps

Answer 24

direct monocular vision (not recommended)
indirect monocular vision
alginate impression and cast in quick setting plaster
paralleling mirror

Question 25

describe parallelism in bridge preps

Answer 25

1. use bur at same angle to survey teeth
2. get birds eye view with front surface mirror
3. angulation of mirror cant change from prep to prep to check all margins
4. alginate imp and cast in plaster