Which landmark marks the beginning of mixed dentition?
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Correct answer: Eruption of permanent first molars
Mixed dentition begins with the eruption of the permanent first molars around age 6. This occurs before any primary teeth are lost.
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More Dentition and development questions
- How many roots does a maxillary first permanent molar typically have?
- Which permanent teeth normally erupt at age 12–13?
- Which primary tooth resembles a permanent premolar in shape?
- Which structure allows developing permanent teeth to erupt by resorbing primary tooth roots?
- Which tooth is most often affected by early childhood caries?
- Which permanent teeth usually erupt without replacing any primary teeth?