Question

The greater number of cutting services on the head of a bur, the:

a) Finer the cut
b) Coarser the cut
c) No impact on the cut
d) Random cutting pattern

Answer 1

The greater number of cutting surfaces on a bur leads to a finer cut due to smaller chips being produced and less material removal per pass. Option A is correct.

Step-by-step explanation:

The question is about the effect of the number of cutting surfaces, also known as flutes, on the head of a dental bur on its cutting action. The more cutting surfaces a bur has, the finer the cut it will produce. This is because multiple cutting edges will produce smaller chips and will tend to remove less material per pass, resulting in a smoother finish. In contrast, a bur with fewer cutting surfaces would remove more material with each pass and thus oftentimes produce a coarser cut. So, the greater number of cutting surfaces on the head of a bur, the finer the cut (option a).