. On the anatomy of vertebrates [electronic resource] . Deciduous and permanent teeth, Human Child : ast. 6^.. o 1 6 Highly-magnified section of dentine and cement, from the fang of a Human molar, v, pi. 123. upper. The average periods of the appearance of both decidu-ous and permanent teeth are as follows:— Deciduous month, mid-incisor, d i to 10th month, , d i to 14th month, first molar, d to 20th month, canine, d to 36th month, second molar, d 4 Permanent ^ years, first molar, m 1, (fig. 258).7th year, mid-incisor, i year,
. On the anatomy of vertebrates [electronic resource] . Deciduous and permanent teeth, Human Child : ast. 6^.. o 1 6 Highly-magnified section of dentine and cement, from the fang of a Human molar, v, pi. 123. upper. The average periods of the appearance of both decidu-ous and permanent teeth are as follows:— Deciduous month, mid-incisor, d i to 10th month, , d i to 14th month, first molar, d to 20th month, canine, d to 36th month, second molar, d 4 Permanent ^ years, first molar, m 1, (fig. 258).7th year, mid-incisor, i year, , i year, first bicuspid, p year, second bicuspid, p to 12th year, canine, to 13th year, second molar, wi to 21st year, third molar, m 3. The structure of human dentine is exemplified in fig. 259. TEETH OF DIPHYODONTS. 327 The dentinal tubes, d, d, send off ramuli into the inter-tubulartissue, and terminate either by anastomotic loops, or in theirregular vacuities or cells at the periphery of the dentine. Thedentinal compartments, or indications of the original ce
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