Primary Teeth & Secondary Teeth

* Humans have two Sets of teeth: Primary & Secondary.

* We have 20 Milk Teeth & 32 Permanent Teeth.

* The eruption pattern of milk teeth & permanent teeth showed in diagram.

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The Eruption pattern may vary according to Following factors.

Local factor- Presence of fibrous connective tissue overlying the tooth.

                     -Ankylosed Teeth

Systemic Factors- Premature Birth

                               Chronic Illness

                               Nutritional status

Primary Teeth(Milk Teeth)

-Primary teeth also called as Milk Teeth.

-In most children the eruption of primary teeth is preceded by increased salivation & child's tendency of putting his fingers in his mouth.

-1^st milk tooth appear in child’s mouth at the age of 6 month.

-Spacing in anteriors of  primary dentition is normal & is necessary to provide enough room for alignment of permanent incisors when they erupt.

Permanent Teeth-

-1^st Permanent tooth appear in oral cavity is 1^st Molar at the age of 6yrs.

-It takes about 2-3yrs for roots to be completed after a tooth has erupted into occlusion.

Conclusion

-6months - 6yrs - Primary Dentition

-6yrs -13yrs - Mixed Dentition

-13yrs onwards - Secondary Dentition