INBDE (Integrated National Board Dental Examination) Practice Exam

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The rule of 7s in ortho/pedo is related to what?

  1. Tooth eruption sequence

  2. Primary molar loss

  3. Permanent molar eruption

  4. Fixed appliance timing

The correct answer is: Primary molar loss

The rule of 7s in orthodontics/pediatric dentistry refers to the sequence of normal primary tooth exfoliation or loss. According to this rule, primary teeth are typically shed in the following pattern: - Lower central incisors: around 6-7 years - Upper central incisors: around 7-8 years - Upper lateral incisors: around 8-9 years - Lower lateral incisors: around 9-10 years - First molars: around 10-11 years - Canines: around 11-12 years - Second molars: around 11-12 years This sequence acts as a guideline for dental professionals to anticipate and monitor the normal shedding of primary teeth in children. It is essential knowledge for planning the timing of orthodontic interventions and monitoring the eruption of permanent teeth.

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