Amalgam Selection Flashcards
True or False: Amalgams can cause fractured cusps.
False
True or False: Amalgams often have recurrent caries.
False
True or False: Resin composites last longer than amalgam.
False
True or False: Amalgam can be bonded to teeth
True (really?)
True or False: Amalgam is old, composite is new and therfore better
False, new is not always better
True or False: The ADA supports amalgam for fear of lawsuits.
No evidence/opinion
True or False: The ADA holds the patent for amalgam.
False
True or False: Amalgam is banned in Germany and Sweden.
False
From where do humans get most of their mercury exposure?
fish
Minamata disease was discovered in ____ after industrial wastewater polluted waters and accumulated highly toxic doses of mercury in ____.
Japan
shellfish and fish
What is the amount of Mercury exposure claimed to be released from amalgam fillings, per day?
1.5 to 50 micrograms/day
however, at 50micrograms per day for 3 years, 10% of the filling would be gone…that’s just not the case
True or False: Comparing amalgam to composite, children with amalgam fillings excreted more mercury in urine.
True, but they did not have adverse renal effects because of it
True or False: There is a statistically significant difference in adverse neuropsychological effects in children with amalgam.
False
*it is possible that very small IQ effects cannot be ruled out, however, there could be selection bias
True or False: A retrospective cohort is at the highest level of evidence.
False
True or False: The amalgam cohort study provided sound evidence of an association between amalgam and disease.
False, limited evidence on an association
True or False: Mercury containing fillings placed during pregnancy increased the risk for low-birth weight children.
False
True or False: Numerous clinical studies have shown the improved performance of amalgam over composite for larger restorations.
True
True or False: Amalgam is just as easily colonized by bacteria when compared to composite.
False, less easily colonized
Is high or low copper amalgam better?
High Copper
- low corrosion
- high strength
- low creep
- high longevity
Which phase in the amalgam setting reaction is eliminated by copper?
gamma 2 phase!
-the phase that is responsible for poor physical and chemical properties (corrosion, low strength, etc)
Which phase interlocks grains of Cu-Sn and prevents sliding at grain boundaries?
n-prime
True or False: Spherical amalgam particles results in smooth carving.
True, its “squishy” but shines up nicely if you can handle it properly
True or False: Lathe cut amalgam results in better proximal contacts and fewer overhangs.
True
Admixed or blended particles will handle like ____ alloys.
lathe-cut (easier to condense against)
