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RESISTANCE FORM 1 27
illustrating the application of the simple mortise to cavity
formation are seen in Figs. 141, 142, 143 and 144.
Fig. 141. Fig. 142.
Fig. 141.—Cavity in the central fossa of a right upper first molar tooth.
Fig. 142.—Cavity involving the occlusal groove on an upper bicuspid.
Rule 2.—In proximo-occlusal cavities on bicuspids and
molars, where the strength of buccal and lingual walls will
Fig. 143. Fig. 144.
Fig. 143.—Cavity in the gingival third of the labial surface of a cuspid.
Fig. 144.—Cavity involving the lingual pit of a left upper lateral incisor,
permit and there is no decay on the occlusal surface, use the
simple mortise form involving two surfaces (see Figs. 145 and
146).
illustrating the application of the simple mortise to cavity
formation are seen in Figs. 141, 142, 143 and 144.
Fig. 141. Fig. 142.
Fig. 141.—Cavity in the central fossa of a right upper first molar tooth.
Fig. 142.—Cavity involving the occlusal groove on an upper bicuspid.
Rule 2.—In proximo-occlusal cavities on bicuspids and
molars, where the strength of buccal and lingual walls will
Fig. 143. Fig. 144.
Fig. 143.—Cavity in the gingival third of the labial surface of a cuspid.
Fig. 144.—Cavity involving the lingual pit of a left upper lateral incisor,
permit and there is no decay on the occlusal surface, use the
simple mortise form involving two surfaces (see Figs. 145 and
146).
