A system of human anatomy, general and special . 98 TEETH—CLASSIFICATION. anterior ethmoid cells, and of the antrum. The largest of the threepassages is the inferior meatus, which is the space between the infe-rior turbinated bone and the floor of the fossa ; in it there are twoforamina, the termination of the nasal duct, and one opening of theanterior palatine canal. The nasal fossa? commence upon the faceby a large irregular opening, the anterior nares, and terminate poste-riorly in the two posterior nares. TEETH. Man is provided with two successions of teeth; the first are theteeth of child
A system of human anatomy, general and special . 98 TEETH—CLASSIFICATION. anterior ethmoid cells, and of the antrum. The largest of the threepassages is the inferior meatus, which is the space between the infe-rior turbinated bone and the floor of the fossa ; in it there are twoforamina, the termination of the nasal duct, and one opening of theanterior palatine canal. The nasal fossa? commence upon the faceby a large irregular opening, the anterior nares, and terminate poste-riorly in the two posterior nares. TEETH. Man is provided with two successions of teeth; the first are theteeth of childhood, they are called temporary, deciduous, or milkteeth; the second continue until old age, and are named permanent. Fig. 45 *a b c d e f g h. e f g h The permanent teeth are thirty-two in number, sixteen in each jaw;they are divisible into four classes,—incisors, of which there are fourin each jaw, two central and two lateral; canine, two above andtwo below; bicuspid, four above and four below; and molars, sixabove and six below. The temporary teeth are twenty in number (fig. 46); eight inci-sors, four canine, and eight molars. The temporary molars have fourtubercles, and are succeeded by the permanent bicuspides, which haveonly two tubercles. Each tooth is divisible into a crown, which is the part apparentabove the gum; a constricted portion around the base of the crown,the neck; and a root or fang, which is contained within the root is invested by periosteum, which lines the alveolus, and isthen reflected upon the root of the tooth as far as its neck. The incisor teeth (cutting teeth) are named from presenting asharp and cutting edge, formed *t the expense of the posterior sur- of the left orbit, s. The opt
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
