c. Enamel Chisels (CHISEL, DENTAL). Chisels (figure 2-7) are hand
instruments used in cavity preparation. They are designed to cleave enamel along the
lines of the enamel rods and to prepare the walls and accessible margins of a cavity.
Straight chisels have single bevels and straight shanks. Bin-angle chisels have single
bevels and two bends in their shanks. Wedelstaedt chisels have single bevels and
curved shanks. Enamel chisels include Wedelstaedt numbers 41 and 42, and black
numbers 81, 83, 84, 85 and 86.
Figure 2-7. Chisels.
d. Enamel Hatchets (EXCAVATOR, DENTAL). Hatchets (figure 2-8) are
instruments designed to cleave enamel along the lines of enamel rods and to prepare the
walls and accessible margins of a cavity preparation. They include black numbers 8, 17,
23, 51, 52, 53, and 54.
Figure 2-8. Hatchets.
MD0503
2-12