Flashcards in Restoration Materials & Instruments Deck (36):
Factors that affect the choice of restoration?
Extent of caries
What does good cavity prep consist of?
Removal of all caries
Removal of minimum amount of healthy tissue
Avoid accidental exposure of pulp
Protect pulp (linings)
Produce a retentive cavity for restoration
What is the purpose of a mouth mirror?
To aid vision
Reflect light onto tooth
Retract and protect soft tissues
Purpose of right angled probe?
Check aviary margins
Assess soft dentine with a cavity
Detect overhangs in restorations
Purpose of excavators?
Removes softened dentine
Small/large spooned shape
Purpose of an amalgam plugger?
Push and adapt filling material to suit cavity shape
Make sure that no air spaces are left
Purpose of a burnisher?
Press and adapt restoration to the cavity margins to prevent leakages
Purpose of enamel chisel?
Remove unsupported enamel from cavity edges
Item is becoming obsolete and is being replaced with the use of various burs
What are methods of moisture control?
High speed suction
Low speed suction
Another name for fast handpiece?
How many revolutions does a fast handpiece do per minute?
How many revolutions does a slow hand piece do per minute?
What does a round bur do?
Gains access to cavities and at a low speed for removing caries
What does a pear shaped but do?
Shapes and smooths cavities
What does a fissure but do?
Shapes and outlines cavities
Types of mandrels
What is the purpose of restorative materials?
Types of temporary restorations
Zinc oxide and eugenol
What is zinc oxide and eugenol used for?
Temp dressing with soothing qualities
What is zinc phosphate used for?
(Thick) temp fill or base of permanent restoration
(Thin) luring cement: crown, inlay,ortho
What is zinc polycarboxylate used for?
Cement crowns,bridges,inlays & ortho
Temp filling or deciduous teeth permanent
What is the purpose of a lining?
To protect pulp from thermal shock
Encourage secondary dentine
What is the chemical symbol for amalgam?
What is amalgam made up of?
Silver up to 74%
Copper up to 30%
What are dentine pins used for?
Improves retention of restoration
What does a matrix system do?
What are the two types of matrix systems?
Siqveland and tofflemire
What is a matrix system used for class V restorations?
What is the instrument used for supra-gingival calculus?
What are wedges used for?
Placed inter dentally to help secure matrix system
What are the five finishing instruments?
What are the three way mercury poisoning can occur?
Which waste does amalgam go into?
Hazardous waste - non infectious/chemical
What are the three types of composite?
Microfine composites - anterior teeth/polishes/glosses
Hybrid comp - posterior teeth/high strength/ better wear resistance
Universal comp - anterior & posterior/combo of both
How much phosphoric acid is in etch?