When polishing the amalgam restoration:
- A. Avoid heat generation by using wet polishing paste.
- B. Wait 24 hours.
- C. A and b.***
- D. B only.
- E. A only.
The correct answer is: c. A and b.
Here's why:
A. Avoid heat generation by using wet polishing paste:
This is correct. Heat generated during polishing can damage the amalgam and the surrounding tooth structure. Using wet polishing paste helps to dissipate heat and prevent this.
B. Wait 24 hours:
This is also correct. The amalgam needs time to fully harden before polishing. Polishing too early can disrupt the setting process and compromise the restoration's strength and longevity.
Therefore, both options a and b are important factors to consider when polishing an amalgam restoration.
Here's why the other options are incorrect:
D. B only:
While waiting 24 hours is important, it's not the only factor. Heat generation during polishing can also be detrimental.
E. A only:
Although using wet polishing paste helps prevent heat generation, it's still crucial to wait for the amalgam to fully harden before polishing.
Polishing procedure:
by using a coarse, rubber abrasive point at low speed or” stall out ”speed and air-water spray for 2 reasons:
- the danger of the point disintegrating at high speeds.
- the danger of elevating the temperature of the restoration and the tooth.
Alternative to rubber abrasive points polishing may be accomplished using a rubber cup with flour of pumice followed by a high luster agent, such as precipitated chalk.
Additional finishing:
and polishing procedures for amalgam are not attempted within 24 hours of insertion because crystallization is not incomplete.
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