W1: Introduction to Dental Restorative Materials Flashcards
WHY technique is important when restoring?
There is no perfect material. But improper technique can jeapordise clinical efficacy
Main purpose of filling
shape, function, look
main material of choice
composite (others GI and Dental amalgam)
Are all restorations permanent?
No, advise pt. that all fillings require replacement.
‘long term’ is better
communicate factors that may negatively affect outcome
is amalgams used?
less than 1% in aust schools, thats why we must learn.
When is amalgams preferred
complex cusp required restorations, metal is better mechanically
When moisture control is required
composite= needed
how many factors are involved clinically when restoring?
3 main, even more…
that’ss why we have many materials
what must we also consider when choosing restorative material
- on our skill and knowledge (e.g. broken light cure, cant expect composite to last long)
- patient: caries risk= no composite, consider anticaries like GIC
- bruxism= not good composite
- ageing= poor moisture control so compromises (cannot rubber dam 3 hr sesh)
- meds
- diet nutrition
clinical challenges:
- no material (esp comp and GIC) likes moisture. NO SALIVA, or have to stop and restart
- remaining tooth structure is little. esp pulpal exposure= decrease of success
- occlusion= may not be rel class I single tooth, but whole quadrant we need to keep natural occlusal bite. always access with articulating paper
why is margin of resto important?
cannot be in way. contact with opp teeth should not be in between. lead to tension, marginal discolouration
importance of occlusion
if not natural bite teeth can move
Indication
Amalgam= few indication
mainly comp/GIC
When to not use
- allergy (contact dermititis)
- don’t use resin material
Do composites last longer than amalgams?
Yes, pretty good now a days.
75K pt, more than 350K resto
failure rate annually- comp and amalgam in post teeth (comp has lower failure
how long can you expect comp to last
10 years if take care.
Could have wear, colour etc but if no bother don’t have to change
biggest prob with composite?
secondary caries class II of rubber dam
- should use rubber dam, if not then use teflon
in small marginal gaps we cannot use wedge what can we use for MC?
teflon
LC is important
need to be above or it may not set properly
Which part of teeth is hard to adhesion weak?
dentine
