1 month old — 1 year old

2 months old — 3 years old

3 months old — 5 years old

6 months – 9 years

9 months old — 13 years old

1 year old — 17 years old

1.5 years old – 20 years old

2 years of age – 24 years of age (when the mind is stabilized)

3 years old — 28 years old

4 years old — 32 years old

5 years old — 36 years old

6 years old — 40 years old (beginning of middle age, body functions begin to deteriorate and are not suitable for breeding).

7 years old — 44 years old

8 years old — 48 years old

9 years old — 52 years old

10 years of age – 56 years of age

11 years old — 60 years old

12 years old — 64 years old

13 years old — 68 years old

14 years of age – 72 years of age

15 years of age – 76 years of age

16 years of age – 80 years of age

17 years old — 84 years old

18 years of age – 88 years of age

19 years old — 94 years old

20 years of age — 96 years of age

Age Dental condition

19-28 days Molar incisors emerge

21-28 days 3rd premolar eruption

21-35 days Canine teeth emerge

21-42 days 4th premolar eruption

28-42 days 2nd premolar eruption

2 months of age All teething is complete

3-4 months of age Replacement of 1st and 2nd incisors, permanent incisor growth

4-5 months of age Replacement of 1st milk premolars, permanent premolars emerge

4-6 months of age Replacement of canine teeth and permanent dentition

4-7 months of age Replacement of 2nd back molars, development of permanent teeth

5-6 months of age Replacement of 3rd incisor, permanent teeth developed

5-7 months of age 2nd, 3rd, 4th permanent premolars complete

6-9 months old Mandibular 3rd permanent back molar complete

9-10 months of age Fully replaced

1 year Permanent teeth long, white, shiny, incisors with cusps

1.5 years old Wear on tip of 1st incisor of mandible

2.5 years old Wear on tip of mandibular 2nd incisor.

3.5 years old Wear on tip of maxillary 1st incisors.

4.5 years old Wear on the tip of the 2nd maxillary incisor.

5 years old Mandibular 3rd incisor tip beginning to show wear, 1st and 2nd incisors worn as rectangles

6 years old Starting to show wear at tip of mandibular 3rd incisor, canines bluntly rounded, mandibular incisors worn out

8 years of age Mandibular 1st incisor begins to wear down and the abrasive surface is tilted anteriorly

10 years The grinding surfaces of the mandibular 2nd and maxillary 1st incisors are oval in shape

11-15 years old Loss of cut teeth, incomplete dentition

16-20 years old Canine teeth loss