. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig. 132. Fig. 133. Fig. 134. Fig. 132.—Simple mortise on one surface. Fig. 133.—Simple dovetail mortise on one surface. The plaster block has beensawed in half to show the inside of the cavity, which is dovetailed on two oppositesurfaces. Fig. 134.—Simple mortise form involving two Fig. 135. Fig. 136. Fig. 137. Fig. 135.—Method of dovetaihng the simple mortise involving two surfaces, thusmaking it retentive in form. Fig. 136.—Auxiliary mortise (step form).Fig. 137.—Compound do
. Operative and dental anatomy technics; a class-room and laboratory manual for freshmen dental students . Fig. 132. Fig. 133. Fig. 134. Fig. 132.—Simple mortise on one surface. Fig. 133.—Simple dovetail mortise on one surface. The plaster block has beensawed in half to show the inside of the cavity, which is dovetailed on two oppositesurfaces. Fig. 134.—Simple mortise form involving two Fig. 135. Fig. 136. Fig. 137. Fig. 135.—Method of dovetaihng the simple mortise involving two surfaces, thusmaking it retentive in form. Fig. 136.—Auxiliary mortise (step form).Fig. 137.—Compound dovetail mortise. Technical Exercises On six cubes of plaster of Paris 2 inches square, preparethe six forms of mortise. Study the line and point anglesin these imaginary cavities. GIVING THE CAVITY FORM 103 Rules for obtaining resistance form. Rule 1. Ill llic shaping of all sim])lc cavities, use ihesimple mortise form, or some modification of it. Examples
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