In general, mandibular teeth erupt before maxillary teeth; teeth tend to erupt in girls before they do in boys. The first teeth to erupt usually are the mandibular central incisors at 5 to 7 months, followed by the maxillary central incisors at 6 to 8 months. Lateral incisors (mandibular then maxillary) erupt next at 7 to 11 months, followed by the first molars (10-16 months), the cuspids (16-20 months), and the second molars (20-30 months).