A text-book of dental histology and embryology, including laboratory directions . The preparation of the cavity shown in Fig. 60. GINGIVAL THIRD CAVITIES 101 sive occlusal cavity, one that has been neglected untilthe enamel has been broken in, and as a result there wasmuch unnecessary loss of tooth structure. The chisel isapplied to the surface as indicated, and the underminedenamel broken down until the sound dentine is reached. Onthe buccal, the enamel wall is cut to the axial plane, and thecavosurface angle bevelled. If the decay in the dentine hadreached the tip of the dentine cusp, it wou
A text-book of dental histology and embryology, including laboratory directions . The preparation of the cavity shown in Fig. 60. GINGIVAL THIRD CAVITIES 101 sive occlusal cavity, one that has been neglected untilthe enamel has been broken in, and as a result there wasmuch unnecessary loss of tooth structure. The chisel isapplied to the surface as indicated, and the underminedenamel broken down until the sound dentine is reached. Onthe buccal, the enamel wall is cut to the axial plane, and thecavosurface angle bevelled. If the decay in the dentine hadreached the tip of the dentine cusp, it would be necessaryto remove the tip of the enamel cusp and incline the wall Fig. 62. A gingival third cavity in a molar. about 8 centigrades buccally from the axial plane, in orderto obtain a strong wall, and then the cusp would bereplaced by filling material. On the lingual the underminedenamel is removed, and the wall inclined slightly linguallyfrom the axial plane and the cavosurface angle bevelled alittle. Fig. 59 shows the relation of the cavity to the Third Cavities.—Fig. 60 is a buccolingual sectionof a superior bicuspid, showing a break in the enamel in Fig. 63
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectteeth, bookyear1912
