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

Question 1

First week of calcification (weeks in utero):

• I1
• I2
• C
• P1
• P2
• M1
• M2
• M3

Answer 1

• 3-4mo
• 3-4mo
• 4-5mo
• 1.75-2yr
• 2.25-2.5
• at birth
• 2.5-3yr
• 8-10 yr

Question 2

Crown completed (Months)

• I1
• I2
• C
• P1
• P2
• M1
• M2
• M3

Answer 2

• 4-5yr
• 4-5 yr
• 6-7
• 5-6
• 6-7
• 2.5-3
• 7-8
• 12-16

Question 3

Eruption (Months):

• I1
• I2
• C
• P1
• P2
• M1
• M2
• M3

Answer 3

• 6-7 yr
• 7-8
• 9-10
• 10-12
• 11-12
• 6-7
• 11-13
• 17-21

Question 4

Root completed (Years)

• I1
• I2
• C
• P1
• P2
• M1
• M2
• M3

Answer 4

• 9
• 10
• 12-14
• 12-13
• 13-14
• 9-10
• 14-15
• 18-25