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2. Restorative Instruments

2-10. HAND INSTRUMENTS USED FOR CAVITY PREPARATION

a. General. Hand instruments are used extensively in cavity preparation. A number of instruments of different designs are used for performing different tooth cutting and caries-removing procedures on various surfaces of different teeth and in different parts of the mouth.

b. Spoon Excavators (EXCAVATOR, DENTAL). Spoon excavators (figure 2-6) are used in removing debris and decayed dentin from cavities. Paired instruments are used. These include Darby-Perry instruments numbers 5, 6, 21, and 22, and black instruments numbers 63, 64, 65, and 66.

Figure 2-6. Spoon excavators.

c. Enamel Chisels. 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.

e. Gingival Margin Trimmers. Gingival margin trimmers) (figure 2-9) are used to bevel the enamel at the cervical seat of the cavity preparation. They include black numbers 77, 78, 79, and 80.

Figure 2-9. Gingival margin trimmers.


David L. Heiserman, Editor

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Revised: June 06, 2015