Ch 2 Primary Lower: Chronology of Human Dentition Table 2-3

Question 1

First week of calcification (weeks in utero):

• i1
• i2
• c
• m1
• m2

Answer 1

• 14(13-16)
• 16(14 2/3-)
• 17(16-)
• 15.5(14.5-17)
• 18(17-19.5)

Question 2

Crown completed (Months)

• i1
• i2
• c
• m1
• m2

Answer 2

• 2.5
• 3
• 9
• 5.5
• 10

Question 3

Eruption (Months)

• i1
• i2
• c
• m1
• m2

Answer 3

• 8(6-10)
• 13(10-16)
• 20(17-23)
• 16(14-18)
• 27(23-31 boy, (24-30) girl

Question 4

Root completed (Years)

• i1
• i2
• c
• m1
• m2

Answer 4

• 1.5
• 1.5
• 3.25
• 2.25
• 3