Page 83 - My FlipBook
P. 83
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81
were so far advanced as to have nearly cut the gum
the shells of the permanent incisores, cuspidati and anterior
grinders were a little advanced, but the cuspidati had not
commenced in the upper jaw, yet he says they are the teeth
of a child eight or nine years of age. This error must
surely be attributed to the printer.
But in plate x. Fig. 1. the teeth of a child he says of five
or six years of age are represented, only the anterior bicus-
pides of the upper jaw had commenced, the middle grind-
ers had not. In the same plate, Fig. 2, the teeth of one side
of both jaws of a child of seven years of age are represen-
ted ; all the succeeding teeth had commenced, but even at
this period the middle permanent grinders had not. He
mentions this as " an age in which there are more teeth
formed and forming than at any other time of life," though
the entire number by his calculation amount to but forty
four. When I come to treat on the shedding of the tempo-
rary teeth, we shall find that some of the permanent inciso-
res appear through the gum before seven years ; or that the
roots of some of the temporary teeth, instead of being per-
fect as Mr. Hunter has represented them, are entirely
wasted. Again in plate xi. fig. % similar mistakes have been
committed ; for he says, in a youth about eleven or twelve
years old, the first two molares of the second set, were so
much advanced that they had cut the gums. Now these
teeth in general appear about the sixth or seventh year ; and
in the same plate he represents the bodies of the middle and
posterior grinders only as slightly formed.
It is unnecessary to recapitulate what I have demonstra-
ted in the beginning of this chapter. Indeed it appears as
an established law of nature, that there should be more teeth
formed and forming at four or five years of age, than at any
that is, in all fifty two. Yet Mr. Hunter has
period of life,
11
81
were so far advanced as to have nearly cut the gum
the shells of the permanent incisores, cuspidati and anterior
grinders were a little advanced, but the cuspidati had not
commenced in the upper jaw, yet he says they are the teeth
of a child eight or nine years of age. This error must
surely be attributed to the printer.
But in plate x. Fig. 1. the teeth of a child he says of five
or six years of age are represented, only the anterior bicus-
pides of the upper jaw had commenced, the middle grind-
ers had not. In the same plate, Fig. 2, the teeth of one side
of both jaws of a child of seven years of age are represen-
ted ; all the succeeding teeth had commenced, but even at
this period the middle permanent grinders had not. He
mentions this as " an age in which there are more teeth
formed and forming than at any other time of life," though
the entire number by his calculation amount to but forty
four. When I come to treat on the shedding of the tempo-
rary teeth, we shall find that some of the permanent inciso-
res appear through the gum before seven years ; or that the
roots of some of the temporary teeth, instead of being per-
fect as Mr. Hunter has represented them, are entirely
wasted. Again in plate xi. fig. % similar mistakes have been
committed ; for he says, in a youth about eleven or twelve
years old, the first two molares of the second set, were so
much advanced that they had cut the gums. Now these
teeth in general appear about the sixth or seventh year ; and
in the same plate he represents the bodies of the middle and
posterior grinders only as slightly formed.
It is unnecessary to recapitulate what I have demonstra-
ted in the beginning of this chapter. Indeed it appears as
an established law of nature, that there should be more teeth
formed and forming at four or five years of age, than at any
that is, in all fifty two. Yet Mr. Hunter has
period of life,
11
