INBDE (Integrated National Board Dental Examination) 2026 – 400 Free Practice Questions to Pass the Exam

The average leeway space per side in the mandible is about 2.5 mm. This allows for the eruption of permanent teeth that are larger in size than the primary teeth they replace. Option B, 1.5 mm, is too small and may not provide enough space for proper tooth alignment. Option C, 2 mm, is close, but not quite the average measurement. Option D, 3 mm, is too large and may result in excessive space between teeth or potential crowding issues.