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OF THE FORMATION, ETC., OF THE ADULT TEETH. 125
The first Incisor is placed on the inside of the root of the
corresponding temporary Tooth, and deeper in the Jaw. The
second Incisor and the Guspidatus begin to be formed on the
inside, and somewhat under the temporary second Incisor and
Cuspidaius. These three are all situated much in the same
manner, with respect to the first set ; but as they are larger,
they are placed somewhat farther back in the circle of the Jaw.
The first Bicuspis is placed under, and somewhat farther
back than the first temporary Grinder, or fourth Tooth of the
child.
The second Bicuspis is placed immediately under the second
temporary Grinder.
The second Molaris is situated in the lengthening tubercle in
the Upper-Jaw, and directly under the Coronoid Process in the
Lower.
The third Molaris, or Dens Sapimtim, begins to form imme-
diately under the Coronoid Process.
The first Adult Molaris comes to perfection, and cuts the
Gum about the twelfth year of age, the second about the
eighteenth, and the third, or Dens Sapiential, from the
twentieth to the thirtieth : so that the Incisor-es and Cuspiclati
require about six or seven years, from their first appearance, to
come to perfection ; the Bicuspides about seven or eight ; and
the Molares about twelve, (c)
(c) [The eruption of the permanent teeth takes place a little earlier in
the lower jaw than in the upper. The following tables record the results
of the observations of Dr. Blake and Mr. Cartwright as the period of
eruption :— (1)
Blake. Years, Cartwright. Years.
Molar, First 6| Molar, First 5 to 7
Incisors, Central 7 Incisors, Central Inferior 5 to 7
„ Lateral 8 ,, ,, Superior ... 6 to 8
Bicuspids, Anterior 9 Lateral 7 to 9
,,
„ Posterior 10 Bicuspids, Anterior 8 to 10
Canines 11 to 12 Canines 9 to 12
Molars, Second 12 to 13 Bicuspids, Posterior 10 to 12
Third (or Wisdom) 12 to 1
,, ... 17 to 25 Molars, Second
Third (Wisdom) 17 to 25
,,
(1) From Quain's Anatomy, by Sliarpey and Quain.
Q
OF THE FORMATION, ETC., OF THE ADULT TEETH. 125
The first Incisor is placed on the inside of the root of the
corresponding temporary Tooth, and deeper in the Jaw. The
second Incisor and the Guspidatus begin to be formed on the
inside, and somewhat under the temporary second Incisor and
Cuspidaius. These three are all situated much in the same
manner, with respect to the first set ; but as they are larger,
they are placed somewhat farther back in the circle of the Jaw.
The first Bicuspis is placed under, and somewhat farther
back than the first temporary Grinder, or fourth Tooth of the
child.
The second Bicuspis is placed immediately under the second
temporary Grinder.
The second Molaris is situated in the lengthening tubercle in
the Upper-Jaw, and directly under the Coronoid Process in the
Lower.
The third Molaris, or Dens Sapimtim, begins to form imme-
diately under the Coronoid Process.
The first Adult Molaris comes to perfection, and cuts the
Gum about the twelfth year of age, the second about the
eighteenth, and the third, or Dens Sapiential, from the
twentieth to the thirtieth : so that the Incisor-es and Cuspiclati
require about six or seven years, from their first appearance, to
come to perfection ; the Bicuspides about seven or eight ; and
the Molares about twelve, (c)
(c) [The eruption of the permanent teeth takes place a little earlier in
the lower jaw than in the upper. The following tables record the results
of the observations of Dr. Blake and Mr. Cartwright as the period of
eruption :— (1)
Blake. Years, Cartwright. Years.
Molar, First 6| Molar, First 5 to 7
Incisors, Central 7 Incisors, Central Inferior 5 to 7
„ Lateral 8 ,, ,, Superior ... 6 to 8
Bicuspids, Anterior 9 Lateral 7 to 9
,,
„ Posterior 10 Bicuspids, Anterior 8 to 10
Canines 11 to 12 Canines 9 to 12
Molars, Second 12 to 13 Bicuspids, Posterior 10 to 12
Third (or Wisdom) 12 to 1
,, ... 17 to 25 Molars, Second
Third (Wisdom) 17 to 25
,,
(1) From Quain's Anatomy, by Sliarpey and Quain.
Q
