PCD TEST 5

What are the common materials used for crowns in temporization?

1. Aluminum 2. Stainless steel 3. Composite Resin 4. Acrylic

How do you mix ZOE?

1. Fluff powder 2. Overfill measuring scoop & level scoop with spatula 3. Place powder on thick, rectangular glass slab 4. Dispense one drop of liquid for each level scoop of powder [2 scoops & 2 drops for complex restorations] 5. Replaced lids immediately [to prevent evaporation from the liquid & to prevent moisture contamination of the powder] 6. Long term storage 7. Mixing time: 45 sec- 1 min 8. Placement in cavity prep is accomplished with or w/o a matrix band

The temporary restoration needs:

1. Marginal integrity 2. Contact with adjacent teeth 3. Lack of Voids 4. Basic contour & anatomy (& occlusion when in a clinical setting)

What type of material is modified ZOE cement?

IRM = Intermediate restorative material

What does ZOE stand for?

Zinc oxide-eugenol

How do you prevent ZOE sticking to your placement instruments?

dip instrument in power

What do glass ionomer materials release?

fluoride

How should you mix ZOE?

mix until stiff; should be able to roll the material into a ball of doughy but NOT sticky

How do you achieve proper contour of ZOE without using a matrix?

pt closes mouth prior to set of material to establish occlusion, then carves away excess material

When is firm-it used with resin?

when final restoration is an onlay

What should you use for caries excavation?

1. maintain a dry field w/ rubber dam or cotton rolls AND saliva ejector 2. Slow speed with sharp/round bur 3. Complete the peripheral excavation firs t

What does ZOE do?

1. obtunds (soothes) the pulp 2. inhibits the set of composite (not indicated under composite)

What is the purpose of temporization?

1. protection of tooth structures & the gingiva 2. maintain position of the tooth in the arch

How do we accomplish long-term storage of ZOE?

1. remove dropper from bottle as the eugenol will cause the dropper to deteriorate 2. use the original lid for storage instead of the dropper

When should use temporization?

1. sometimes for deep caries remaining [6-8 weeks] 2. caries control for a patient with rampant caries 3. when time is a factor (direct and indirect restorations)