. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . removal of decay and the shaping of the internal parts ofcavities. There are five forms, viz., the hatchet, the hoe, thespoon, the discoid and the cleoid. Their names indicate theirform, they being designed after the ordinary hatchet, hoe,spoon, etc. (Fig. 61). The hatchet excavator (Fig. 61; 12-5-12) has the edge ofthe blade running in a direction parallel with the handle, and EXCAVATORS AND CHISELS 57 is bi-bevelcd. In the hoe excavator (Fig. 6i; 8-3-23) the edgeof the blade is beveled
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . removal of decay and the shaping of the internal parts ofcavities. There are five forms, viz., the hatchet, the hoe, thespoon, the discoid and the cleoid. Their names indicate theirform, they being designed after the ordinary hatchet, hoe,spoon, etc. (Fig. 61). The hatchet excavator (Fig. 61; 12-5-12) has the edge ofthe blade running in a direction parallel with the handle, and EXCAVATORS AND CHISELS 57 is bi-bevelcd. In the hoe excavator (Fig. 6i; 8-3-23) the edgeof the blade is beveled on the side distal (away from) to theshaft and runs at right angles to it. The hatchet and hoe areused for the removal of the harder varieties of decay and togive form to the internal parts of cavities. The spoons (; 10-6-12) and discoids (round spoons) are intended es-pecially for the scooping out of soft decay, and are beveledonly on the distal (far) side. Clcoid means claw-like, theinstrument having a sharp point, with two rounded edgesrunning from it—really a spoon excavator with the blade.
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