Treatment Planning for Fixed Pros

Question 1

what are fixed pros restorations also called

Answer 1

indirect restorations

Question 2

examples o fixed pros

Answer 2

veneers
onlay
inlays
crowns

Question 3

what should you examine with the lips when looking at fixed pros

Answer 3

vermillion borders
commissures
smile line

Question 4

what soft tissues will indicate if a patient has bruxism

Answer 4

buccal mucosa
lateral border of the tongue

Question 5

what is the white line that can be present on the buccal mucosa as a result of bruxism called

Answer 5

linea alba

Question 6

what needs treated and managed before starting fixed pros

Answer 6

periodontal disease

Question 7

what is canine guidance

Answer 7

patient moves the jaw laterally as far as it goes and only canines are touching - all other
posterior teeth are not in occlusion

Question 8

what is group function

Answer 8

patient moves jaw laterally as far as it goes and all posterior teeth are still in contact

Question 9

what are examples of special investigations

Answer 9

sensibility testing (EPT or ethyl chloride)
radiographs
study models
facebow registration
diet diary
plaque and gingivitis indices
FMPC
photographs
biopsies

Question 10

what are the five stages of treatment

Answer 10

immediate
initial - disease control
re-evaluation
reconstructive
maintenance

Question 11

what factors affect the patients options for fixed pros

Answer 11

costs
time
medical issues
dentist

Question 12

what are three examples of a tooth that is unrestorable

Answer 12

caries is down to alveolar crest - no margins
horizontal fractures along pulp floor
vertical root fractures

Question 13

what can be used to get an existing post and core out

Answer 13

eggler device

Question 14

what are reasons people want veneers

Answer 14

improve aesthetics
change teeth shape
correct peg laterals
reduce or close proximal spaces

Question 15

what are contra-indications of veneers

Answer 15

poor OH
high caries
gingival recession
root exposure

Question 16

when would you use onlays/ inlays

Answer 16

tooth wear caries
increase OVD
fractured cusps
replace failed direct restorations

Question 17

why are crowns provided

Answer 17

protect weakened tooth structure
improve or restore aesthetics
retainer for bridge work
reduce tooth function

Question 18

contra-indications of crowns

Answer 18

active caries and perio disease
more conservative options available
lack of tooth tissue for preparation
unable to provide post and core

Question 19

what are the six principles of crown preparation

Answer 19

preserve tooth structure
retention and resistance
structural durability
marginal integrity
preservation of periodontium
aesthetic considerations

Question 20

what does underpreparation of a tooth result in

Answer 20

poor aesthetics
over built crown with periodontal and occlusal consequences
restorations with insufficient thickness

Question 21

what is retention

Answer 21

prevention of removal of the restoration along path of insertion

Question 22

what is resistance

Answer 22

prevents dislodgment of the restorations by forces directed in apical or oblique direction

Question 23

what should the taper be for a crown

Answer 23

inclination of opposing walls at 6-10 degrees

Question 24

what factors affect retention and resistance in crown prep

Answer 24

taper
length of walls
path of insertion
extra means of retention (grooves and slots)

Question 25

what improves retention

Answer 25

limiting the number of paths of insertion

Question 26

what increases the number of paths of insertion

Answer 26

over-tapering the preparation

Question 27

what is structural durability achieved through

Answer 27

occlusal reduction functional cusp bevel axial reduction

Question 28

what does axial reduction involve

Answer 28

preparing the tooth in more than one plane - not just taking a straight line down the incisal edge

Question 29

what are the five types of marginal integrity preparations

Answer 29

knife edge bevel chamfer shoulder bevelled shoulder

Question 30

what does a chamfer bur look like

Answer 30

has a rounded tip

Question 31

what does a shoulder bur look like

Answer 31

flat bur

Question 32

what should margins of the crown restoration be

Answer 32

smooth and fully exposed to a cleaning action placed where the dentist can finish them placed supra-gingivally

Question 33

what is the biological width

Answer 33

distance between the very depth of sulcular epithelium and alveolar bone

Question 34

what is the dento-gingival complex

Answer 34

gingival margin to the very top of alveolar bone

Question 35

what helps you decide what material to use for crowns

Answer 35

is it for aesthetics (anterior) or functional

Question 36

what can occur if a patient is a bruxist and has had all anterior ceramic crowns positioned

Answer 36

they can wear down the opposing teeth

Question 37

what are bridge designs

Answer 37

cantilever (only held on at one side) fixed - fixed (both sides)

Question 38

what consent should you get from a patient for fixed pros work

Answer 38

written and verbal