. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . afer instrument than the engine reamer. It, aswell as the other varieties of broach, is designed to be usedeither in a broach handle (broach holder) (Fig. 102) or as a long-handle instrument. There is also a variety of twist broachknown as a Nub broach (see illustration. Fig. loi) intended foroperations on the lower teeth. Of these the Downie andKerr are the most prominent makes. SEPARATORS AND MATRICES 77 (c) Separator.—A steel instrument, designed for forcingapart (wedge separator) or d
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . afer instrument than the engine reamer. It, aswell as the other varieties of broach, is designed to be usedeither in a broach handle (broach holder) (Fig. 102) or as a long-handle instrument. There is also a variety of twist broachknown as a Nub broach (see illustration. Fig. loi) intended foroperations on the lower teeth. Of these the Downie andKerr are the most prominent makes. SEPARATORS AND MATRICES 77 (c) Separator.—A steel instrument, designed for forcingapart (wedge separator) or drawing apart (traction separator)two approximating teeth, thus gaining space for makingexamination of, or operating in, inter-proximal spaces. Thewedge separator acts on the principle of a wedge, by the forcingtogether of two steel points; the/rac/^f?w separator Sicts in the op-posite manner by the drawing apart of two pairs of points;while some instruments combine both principles. The Ivory(Figs. 103 and 104), ^Perry^ (Fig. 105), ^Little Giant andElliot (Fig. 106) separators are prominent
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