. A system of anatomy for the use of students of medicine (Volume 1). lar, like the duct of asebaceous follicle, and gradually opened as the tooth progressed.—At the fifth month of foetal life, according to Bell, and theeighth and ninth, according to Blake and Fox, the germs of thefirst permanent molars, may be seen at the outside of the infantilerow, and those of the permanent incisors behind the 10—1, 2, shows the attachment of the incisor and molargerms of the two sets, just prior to the eruption of the first. Thepermanent germ is at first placed in the socket of the deciduou
. A system of anatomy for the use of students of medicine (Volume 1). lar, like the duct of asebaceous follicle, and gradually opened as the tooth progressed.—At the fifth month of foetal life, according to Bell, and theeighth and ninth, according to Blake and Fox, the germs of thefirst permanent molars, may be seen at the outside of the infantilerow, and those of the permanent incisors behind the 10—1, 2, shows the attachment of the incisor and molargerms of the two sets, just prior to the eruption of the first. Thepermanent germ is at first placed in the socket of the deciduoustooth, of which it appears, on first view, to be an offshoot orgemmiperous production. Its vessels and nerves are believed to bemere branches of those of the deciduousset. By degrees a distinct socket isformed for it behind the latter, and itsprocess or gubernaculum is elongated, asseen in Fig. 10—3. When the decidu-ous teeth have cut the gum, the twosockets are completely distinct, as seenin Fig. 11, and the gubernaculum is at-tached to the gum. 9* Fig. 102 DEVELOPEMENT OF THE TEETH. —Ossification first commences in the permanent set on the an-terior molares, and may be seen at birth; at the age of twelvemonths, it has progressed to a considerable extent upon these aswell as upon the incisors and the lower cuspidata. At the sixthor seventh year of age the whole of the permanent teeth are moreor less ossified, and the incisors are so far completed as to benearly ready to make their appearance through the gum. Atthis period there are no less than forty-eight teeth in the twojaws, the twenty deciduous and the twenty-eight permanent,which are in different degrees of developement. The last mo-lars do not begin to ossify till the ninth year, and are the last ofall to make their appearance through the gum, whence theyhave received the name of denies sapientice or wisdom teeth.—The permanent teeth, which are more in number and individu-ally of larger size and form a la
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