Finishing and Polishing Amalgam

Question 1

t/f: Must wait at least 24 hours after placement,
when crystallization is complete, otherwise
excess mercury will be drawn to the surface,
weakening the margins later.

Answer 1

true

Question 2

• Over-finishing could leave the restoration under-contoured or
destroy groove anatomy.
• Careless finishing might destroy occlusal stops that we want to
preserve.
• Accidental overheating of the amalgam might damage the pulp or
draw mercury to the surface of the amalgam, leaving the margins
more prone to corrosion and subsequent ditching.
• Even though amalgam finishing is minimally invasive, it still involves
use of rotary dental instruments in the patient’s mouth.

Answer 2

risks of finishing amalgam prep

Question 3

/ of the enamel thickness in a given area can
be removed to extend the life of the restoration
without replacing it

Answer 3

1/3

Question 4

T/F: When Polishing amalgams, Do not overheat or mercury will be brought to the surface of the amalgam and the margin will corrode more and lose strength. Amalgam will break down more easily.

Answer 4

true

Question 5

• Speed of the bur
• Dullness of the bur
• Pressure exerted
against the work

Answer 5

Factors Producing Heat While Finishing &Polishing Tooth Structure