Inter transitional period is the period in which:

  # Inter transitional period is the period in which:

A. Permanent canine, premolar and molar erupt

B. Permanent molar has just erupted

C. 7-9 years of age with 12 primary and 12 permanent teeth

D. When all first molars are erupting

The correct answer is C. 7-9 years of age with 12 primary and 12 permanent teeth

Inter transitional period:

• Relatively stable phase 

• Teeth present are the permanent incisors and first molar (8 + 4 = 12) and deciduous canines and molars (4 + 8 = 12) 

Some of the features of this stage are: 

• Presence of Ugly duckling stage (7 to 9 years) 

• Root formation of emerged teeth + increase in alveolar process height 

• Root resorption of remaining deciduous molars 

• Preparatory phase for second transitional phase