Which statement best describes eruption timing of deciduous upper lateral incisor?

Which statement best describes eruption timing of deciduous upper lateral incisor?

• A. Erupts around 11 months
• B. Erupts around 7 months
• C. Erupts around 18 months
• D. Erupts around 24 months

Answer: (A)

Deciduous maxillary lateral incisors tend to erupt after the central incisors, in the first year of life. The typical window is about 9 to 13 months, so around 11 months sits squarely within the expected range. Erupting around seven months would be earlier than usual for this tooth, being more common for central incisors. Waiting until 18 or 24 months would be later than the normal window for a deciduous lateral incisor. Of course, individual variation exists, but 11 months best fits the common timing for this eruption.

Deciduous maxillary lateral incisors tend to erupt after the central incisors, in the first year of life. The typical window is about 9 to 13 months, so around 11 months sits squarely within the expected range. Erupting around seven months would be earlier than usual for this tooth, being more common for central incisors. Waiting until 18 or 24 months would be later than the normal window for a deciduous lateral incisor. Of course, individual variation exists, but 11 months best fits the common timing for this eruption.