A text-book of dental histology and embryology, including laboratory directions . Caries beginning in an occlusal defect of a molar. (About 80 X) enamel wall is bevelled to the point where the margin of thefilling is desired and the filling finished to this position. 96 PREPARATION OF TYPICAL ENAMEL WALLS Fig. 55 shows a buccolingual section through a molarwith a small cavity in a mesial pit. Caries has undermined Fig. 56. The preparation of the enamel walls of the cavity shown in Fig. 55 the enamel slightly toward the buccal, but has attacked theenamel on the surface, extending toward the lin
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A text-book of dental histology and embryology, including laboratory directions . Caries beginning in an occlusal defect of a molar. (About 80 X) enamel wall is bevelled to the point where the margin of thefilling is desired and the filling finished to this position. 96 PREPARATION OF TYPICAL ENAMEL WALLS Fig. 55 shows a buccolingual section through a molarwith a small cavity in a mesial pit. Caries has undermined Fig. 56. The preparation of the enamel walls of the cavity shown in Fig. 55 the enamel slightly toward the buccal, but has attacked theenamel on the surface, extending toward the lingual farther PREPARATION OF SIMPLE OCCLUSAL CAVITIES 97 than the enamel has been undermined at the dento-enameljunction. Applying the chisel to the surface, the underminedenamel is split away, as is indicated in Fig. 56. The buccalwall is planed until it is in the axial plane, and the cavo-surface angle bevelled. It is not necessary to extend thecavity to the lingual beyond the point where sound dentineis reached, but the disintegrated enamel on the surface mustbe removed. The enamel wall is, therefore, inclined about6 centigrades lingually from the axial plane, and it is not Fig. 57