Sim Clinic W1-6 Flashcards by Brigitte Francis

What are the two types of pit and fissure sealants?

Glass ionomer based

Resin based

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What are the 6 steps in composite restoration?

Isolation
Acid etch
Primer and Bond
Composite
Curing
Finishing and polishing

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What is the name of this dental tool?

Microbrush/ brush applicator

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What class of caries is this image?

Class I

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What class of caries is this image?

Class II

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Identify the three classes of caries in these three images

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What are direct restorations vs indirect?

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Name this

Amalgam capsule

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What does the plunger denote on the amalgam capsule?

The spill size.

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In composite restoration, what tools are required for ISOLATION?

Rubber dam kit, cotton roles,

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What is the concentration of acid etch- super etch?

37% wt phosphoric acid for enamel and dentin

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What is the SDI admix slow set amalgam estimates?

5 minutes packing

8 minutes carving

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What are the three components of the amalgam capsule?

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How many seconds should a 3 Spill capsule be in the amalgamator for?

Approx 8 seconds

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When you fit your capsule into the amalgamator, how do you add and then remove the capsule effectively?

Ensure the BASE is secure and it leaves LAST

BASE in FIRST
BASE out LAST

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Which end do you tap the amalgam into after it’s finished the cycle in amalgamator?

Tap capsule on BASE end- amalgam should be collected in base.

What is it called when amalgam has been spun in the amalgamator?

Triturated amalgam

How do you use the hollenback carver?

Perpendicular to tooth surface, tip does not pass midline, use tooth incline as guide

What is the Frahm (diamond) carver used for?

Vertical tip is used to carve the fissure starting at terminal triangular fossa.

What hand instruments are used in amalgam prep?

Hollenback carver, diamond-carver (Frahm), amalgam plugger, mirror, tweezers, cotton pellet (damp from triplex), amalgam carrier, HVE, overhead light, amalgamator, amalgam kit

What spill size are each coloured plungers?

The sterizilable 7.5mm fibre-optic light guide generates a curing density of 1250mW/cm2.
What colour wavelength does the light curing wand emit?

The LED emits a spectrum of Blue Light - 420-480nm

Why should the orange light hood on the curing light ALWAYS be used?

As it is potentially damaging to eyesight looking at the light directly or indirectly

There are 3 different light modes for the blue light: fast (constant), pulse and and ramping mode.
How long does the blue light remain on when set to the stardard mode (fast mode)

10 seconds

What product is used primarily in the placement of anterior composite resin restorations?

A clear matrix strip called clear Mylar® strip, acetate strip or celluloid strip - helps shape the mesial and distal margins of the anterior teeth. It doesnt matter what the strip is actually made of, as long as it is thin, tough and lets the light through.

What is the main disadvantage of composite?

highly technique sensitive and prone to contamination (including dust/debris, water, saliva, blood, oils AND light)

As contamination can be a major issues when using composites/resins, It is crucial to develop habits that minimize exposure to these contaminants when handling/manipulating the material. What are some general rules/guidelines to abide by?

1/ Keep the instrument tips clean (not touching any surface which has contaminants on it and constantly wipe clean the tips) NB. Facial tissues are normally used for wiping even though they do produce fine lint fibres 2/ Don't touch the materials with your gloves (unless they are free of water, oil, saliva, blood and you have no skin allergies to the resin, as the liquid monomer can penetrate the gloves) 3/ Minimize exposure to ambient light 4/ Ensure the light-curing wand tip is clear of composite (and avoid contacting the tip onto the composite) 5/ Use appropriate field isolation such as triple syringe air and rubber dam for moisture control 6/ Use photo-block or light safe cannula tips for the light-cured materials and always recap the unidose capsule/ syringe once dispensed and convenient to do so. Dispose of the metal tips in the sharps container. To block out the blue wavelength of light, the photo-block tips are either opaque black or clear tinted yellow or orange.

Viscosity and tackiness tend to be an inversely proportional property of the composite ie. the stiffer the composite, it tends not to stick to the instrument as much. What type of composite is used simclinic and why?

A mid-range viscosity: tends to stick to the hand instrument but has good ability to "flow" or mould onto a surface.

How can you help prevent the composite from sticking to the hand instruments?

The recommended separating coating is a thin amount of flowable composite. Another name for this use of flowable is "sculpting" or "modelling" resin. The use of bonding resin is NOT recommended (though many use it) as it tends to dilute & weaken the composite/absorb water and result in staining.

Most composites have some level of volumetric shrinkage, therefore the greater the volume, the greater the amount of shrinkage. The direction of the shrinkage tends to be towards the surface with the greatest bond strength upon curing. In simclinic, how should smaller occlusal preparations (Class I restorations) vs larger cavity preparations be done/cured?

Class I restoration of the very small occlusal preparations (<2mm deep) should be done in a single increment. In larger cavity preparations (>2mm deep), the incremental layering technique, building up cusp by cusp is recommended, in order to ensure the base of the increment can be reached by the light (20 second light exposure/increment!)

What is the average depth of cure for composite

The depth of cure of a regular composite is 2mm (NB. the darker the tint, the less light can be transmitted)

Describe the difference in the two types of composite resin viscosities

High viscosity = paste -> either syringe or unidose capsules Low viscosity = flowable

What is restorative equilibrium?

The point where the amount of restoration replaces exactly what was lost during preparation