11. Introduction to Amalgam Flashcards
The most toxic form of mercury is _
methyl mercury
Mercury can be monitored by _, _, _, and hair
exhalation
urine
blood
_ is the best method to measure chronic mercury exposure with the normal being less than _ ug/L
Urine
25
A reliable measurement of recent methylmercury exposure is through _ with normal being less than _ ug/L
blood
6
Amalgam is used normally when esthetics is less important, in areas where isolation is not possible, and for _ of posterior teeth
core buildups
Amalgam is an alloy of _ with other metals
Hg
Low Cu alloys with Zn exhibit _
delayed expansion
Gamma 1 is _ and _
silver and mercury
Gamma 2 is _ and _
tin and mercury
Gamma is _ and _
silver and tin
_ is the process of mixing Hg with amalgam alloy powder
Trituration
Name the trituration effect: Generates heat creates excess matrix premature setting poor condensation and adaptation weak restoration
Excessive trituration
_trituration produces grainy, crumbly mix
undertrituration
_ is the process of packing the amalgam into the cavity preparation
condensation
Name the process: Continuation of trituration adapts amalgam to cavity walls reduces residual Hg eliminates voids increases strength and serviceability of restoration
Condensation
