Loose enamel rods at the gingival floor of a class II amalgam cavity should be removed using:
- A- Straight chisel.
- B- Hatchet.
- C- Gingival curetla.
- D- Gingival marginal trimmer.
The correct answer is D. Gingival marginal trimmer.
Gingival marginal trimmers are specifically designed to remove loose enamel rods at the gingival floor of a class II amalgam cavity. They are small, sharp instruments that can be used to carefully remove the enamel without damaging the surrounding tooth structure.
The other options are incorrect:
- A. Straight chisel is a large, heavy instrument that is not well-suited for removing small, delicate pieces of enamel.
- B. Hatchet is a similar instrument to the straight chisel, but it is even larger and heavier.
- C. Gingival curetla is used to remove calculus and debris from the gingival sulcus, not to remove enamel.
So the answer is D. Gingival marginal trimmer.
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