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Dentes Decíduos (de Leite): Sequência de Erupção, Características e Exfoliação

20 primary teeth erupt and exfolialize on a predictable timeline:

Eruption Sequence (Average)

• 6–10 mo: Mandibular central incisors
• 8–12 mo: Maxillary centrals
• 9–13 mo: Maxillary laterals
• 10–16 mo: Mandibular laterals
• 13–19 mo: First molars
• 16–22 mo: Canines
• 23–33 mo: Second molars

All 20 usually present by age 3.

Characteristics vs. Permanent

• Smaller, whiter (thinner enamel), broader contact areas.
• Larger pulp chambers → faster caries progression.
• Shorter, divergent roots (resorb for exfoliation).

Exfoliation

• Begins ~6 yr (mandibular centrals).
• Complete ~12–13 yr (second molars).
• Permanent successors erupt lingual (incisors) or beneath (molars).

Care

Brush 2×/day with fluoride rice-grain (≤3 yr) / pea (>3 yr); first dental visit by 1 yr; avoid bottle at bed; sealants on primary molars if high risk.

Primary teeth maintain space, guide eruption, enable nutrition/speech.