Page 170 - My FlipBook

158 MECHANICAL DENTISTRY AND METALLURGY.
bicuspids and molars, is a neatly fitting ruljber or metal
plate. If the anterior teeth have been moved at the same
time, the plate should not extend far enough forward to
Fig. 120.

rest against these teeth. The plate is unreliable for the
retention of the incisors and cuspids, owing to their sloping
surfaces. When we have this condition to meet, a com-

FlG. 121.

bination of retaining fixtures, a plate for the bicuspids and
molars, and the bands and bar for the incisors and cuspids,
as indicated in Fig. 120, is the most satisfactory.