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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 

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