(The inferior generally precede the superior by two or three months.)

Central incisors.............5 to 8 months.

Lateral incisors ............7 to 10 "

First molars..............12 to 16 "

Canines................14 to 20 "

Second molars.............20 to 36 "

The following diagram, by Dr. Louis Starr,1 shows the grouping, the date of eruption and the duration of the pauses between the appearance of each group of temporary teeth.

1 Diseases of the Digestive Organs in Children, Philadelphia, 1891.

The numbers 1 to 5 indicate the groups to which the individual teeth belong and their order of appearance, and the letters a and b the precedence of eruption in the different groups.

Explanation Of Diagram

1. I. Between the fourth and seventh months. Pause of 3 to 9 weeks.

2. 2. 2. 2. Between the eighth and tenth months. Pause of 6 to 12 weeks.

3. 3. 3. 3. 3. 3. Between the twelfth and fifteenth months. Pause until the eighteenth month.

4. 4. 4. 4. Between the eighteenth and twenty-fourth months. Pause of 2 to 3 months.

5. 5. 5. 5. Between the twentieth and thirtieth months.

Permanent Teeth

First molars . . 5 to 6 years.

Central incisors . 6 to 8 "

Lateral incisors . 7 to 9 "

First bicuspids . 9 to 10 "

Second bicuspids 10 to 12 years. Canines . . . . 11 to 13 " Second molars . 12 to 14 " Third molars . . 17 to 21 "